Merge branch 'develop' of https://github.com/dotnetcore/CAP into develop

.github/ISSUE_TEMPLATE

+<!--
+Thank you for reporting an issue.
+
+1. It's RECOMMENDED to submit PR for typo or tiny bug fix.
+2. If this's a FEATURE request, please provide: details, pseudo codes if necessary.
+3. If this's a BUG, please provide: course repetition, error log and configuration. Fill in as much of the template below as you're able.
+
+感谢您向我们反馈问题。
+
+1. 提交问题前，请先阅读 https://github.com/dotnetcore/CAP/wiki 上的文档。
+2. 我们推荐如果是小问题（错别字修改，小的 bug fix）直接提交 PR。
+3. 如果是一个新需求，请提供：详细需求描述，最好是有伪代码实现。
+4. 如果是一个 BUG，请提供：复现步骤，错误日志以及相关配置，并尽量填写下面的模板中的条目。
+6. 扩展阅读：[如何向开源项目提交无法解答的问题](https://zhuanlan.zhihu.com/p/25795393)
+-->
+
+Please answer these questions before submitting your issue.
+
+- Why do you submit this issue?
+- [ ] Question or discussion
+- [ ] Bug
+- [ ] Requirement
+- [ ] Feature or performance improvement
+
+___
+### Question
+- What do you want to know?
+
+___
+### Bug
+- Which version of CAP, OS and .NET Core?
+
+- Which company or project?
+
+- What happen?
+If possible, provide a way for reproducing the error. e.g. demo application, component version.
+
+___
+### Requirement or improvement
+- Please describe about your requirements or improvement suggestions.
\ No newline at end of file

CAP.sln

@@ -17,6 +17,7 @@ Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "Solution Items", "Solution
 		CHANGELOG.md = CHANGELOG.md
 		CODE_OF_CONDUCT.md = CODE_OF_CONDUCT.md
 		ConfigureMSDTC.ps1 = ConfigureMSDTC.ps1
+		.github\ISSUE_TEMPLATE = .github\ISSUE_TEMPLATE
 		LICENSE.txt = LICENSE.txt
 		README.md = README.md
 		README.zh-cn.md = README.zh-cn.md
@@ -54,15 +55,11 @@ Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DotNetCore.CAP.MySql.Test",
 EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sample.RabbitMQ.MySql", "samples\Sample.RabbitMQ.MySql\Sample.RabbitMQ.MySql.csproj", "{9F3F9BFE-7B6A-4A7A-A6E6-8B517D611873}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sample.RabbitMQ.SqlServer", "samples\Sample.RabbitMQ.SqlServer\Sample.RabbitMQ.SqlServer.csproj", "{AF17B956-B79E-48B7-9B5B-EB15A386B112}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DotNetCore.CAP.PostgreSql", "src\DotNetCore.CAP.PostgreSql\DotNetCore.CAP.PostgreSql.csproj", "{82C403AB-ED68-4084-9A1D-11334F9F08F9}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sample.RabbitMQ.PostgreSql", "samples\Sample.RabbitMQ.PostgreSql\Sample.RabbitMQ.PostgreSql.csproj", "{A17E8E72-DFFC-4822-BB38-73D59A8B264E}"
-EndProject
 Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "DotNetCore.CAP.PostgreSql.Test", "test\DotNetCore.CAP.PostgreSql.Test\DotNetCore.CAP.PostgreSql.Test.csproj", "{7CA3625D-1817-4695-881D-7E79A1E1DED2}"
 EndProject
-Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sample.Kafka.SqlServer", "samples\Sample.Kafka.SqlServer\Sample.Kafka.SqlServer.csproj", "{573B4D39-5489-48B3-9B6C-5234249CB980}"
+Project("{9A19103F-16F7-4668-BE54-9A1E7A4F7556}") = "Sample.Kafka.MySql", "samples\Sample.Kafka.MySql\Sample.Kafka.MySql.csproj", "{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91}"
 EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
@@ -105,26 +102,18 @@ Global
 		{9F3F9BFE-7B6A-4A7A-A6E6-8B517D611873}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{9F3F9BFE-7B6A-4A7A-A6E6-8B517D611873}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{9F3F9BFE-7B6A-4A7A-A6E6-8B517D611873}.Release|Any CPU.Build.0 = Release|Any CPU
-		{AF17B956-B79E-48B7-9B5B-EB15A386B112}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{AF17B956-B79E-48B7-9B5B-EB15A386B112}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{AF17B956-B79E-48B7-9B5B-EB15A386B112}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{AF17B956-B79E-48B7-9B5B-EB15A386B112}.Release|Any CPU.Build.0 = Release|Any CPU
 		{82C403AB-ED68-4084-9A1D-11334F9F08F9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{82C403AB-ED68-4084-9A1D-11334F9F08F9}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{82C403AB-ED68-4084-9A1D-11334F9F08F9}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{82C403AB-ED68-4084-9A1D-11334F9F08F9}.Release|Any CPU.Build.0 = Release|Any CPU
-		{A17E8E72-DFFC-4822-BB38-73D59A8B264E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{A17E8E72-DFFC-4822-BB38-73D59A8B264E}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{A17E8E72-DFFC-4822-BB38-73D59A8B264E}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{A17E8E72-DFFC-4822-BB38-73D59A8B264E}.Release|Any CPU.Build.0 = Release|Any CPU
 		{7CA3625D-1817-4695-881D-7E79A1E1DED2}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
 		{7CA3625D-1817-4695-881D-7E79A1E1DED2}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{7CA3625D-1817-4695-881D-7E79A1E1DED2}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{7CA3625D-1817-4695-881D-7E79A1E1DED2}.Release|Any CPU.Build.0 = Release|Any CPU
-		{573B4D39-5489-48B3-9B6C-5234249CB980}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
-		{573B4D39-5489-48B3-9B6C-5234249CB980}.Debug|Any CPU.Build.0 = Debug|Any CPU
-		{573B4D39-5489-48B3-9B6C-5234249CB980}.Release|Any CPU.ActiveCfg = Release|Any CPU
-		{573B4D39-5489-48B3-9B6C-5234249CB980}.Release|Any CPU.Build.0 = Release|Any CPU
+		{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -139,11 +128,9 @@ Global
 		{FA15685A-778A-4D2A-A2FE-27FAD2FFA65B} = {9B2AE124-6636-4DE9-83A3-70360DABD0C4}
 		{80A84F62-1558-427B-BA74-B47AA8A665B5} = {C09CDAB0-6DD4-46E9-B7F3-3EF2A4741EA0}
 		{9F3F9BFE-7B6A-4A7A-A6E6-8B517D611873} = {3A6B6931-A123-477A-9469-8B468B5385AF}
-		{AF17B956-B79E-48B7-9B5B-EB15A386B112} = {3A6B6931-A123-477A-9469-8B468B5385AF}
 		{82C403AB-ED68-4084-9A1D-11334F9F08F9} = {9B2AE124-6636-4DE9-83A3-70360DABD0C4}
-		{A17E8E72-DFFC-4822-BB38-73D59A8B264E} = {3A6B6931-A123-477A-9469-8B468B5385AF}
 		{7CA3625D-1817-4695-881D-7E79A1E1DED2} = {C09CDAB0-6DD4-46E9-B7F3-3EF2A4741EA0}
-		{573B4D39-5489-48B3-9B6C-5234249CB980} = {3A6B6931-A123-477A-9469-8B468B5385AF}
+		{9CB51105-A85B-42A4-AFDE-A4FC34D9EA91} = {3A6B6931-A123-477A-9469-8B468B5385AF}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {2E70565D-94CF-40B4-BFE1-AC18D5F736AB}

ConfigureMSDTC.ps1

-# 
-# Enable MSDTC
-# 
-
-Write-Host "Enabling MSDTC..." -ForegroundColor Yellow
-$DTCSecurity = "Incoming"
-$RegPath = "HKLM:\SOFTWARE\Microsoft\MSDTC\"
-
-#Set Security and MSDTC path
-
-$RegSecurityPath = "$RegPath\Security"
-
-Set-ItemProperty path $RegSecurityPath name "NetworkDtcAccess" value 1
-Set-ItemProperty path $RegSecurityPath name "NetworkDtcAccessClients" value 1
-Set-ItemProperty path $RegSecurityPath name "NetworkDtcAccessTransactions" value 1
-Set-ItemProperty path $RegSecurityPath name "NetworkDtcAccessInbound" value 1
-Set-ItemProperty path $RegSecurityPath name "NetworkDtcAccessOutbound" value 1
-Set-ItemProperty path $RegSecurityPath name "LuTransactions" value 1
-
-if ($DTCSecurity eq "None")
-{
-	Set-ItemProperty path $RegPath name "TurnOffRpcSecurity" value 1
-	Set-ItemProperty path $RegPath name "AllowOnlySecureRpcCalls" value 0
-	Set-ItemProperty path $RegPath name "FallbackToUnsecureRPCIfNecessary" value 0
-}
-elseif ($DTCSecurity eq "Incoming")
-{
-	Set-ItemProperty path $RegPath name "TurnOffRpcSecurity" value 0
-	Set-ItemProperty path $RegPath name "AllowOnlySecureRpcCalls" value 0
-	Set-ItemProperty path $RegPath name "FallbackToUnsecureRPCIfNecessary" value 1
-}
-else
-{
-	Set-ItemProperty path $RegPath name "TurnOffRpcSecurity" value 0
-	Set-ItemProperty path $RegPath name "AllowOnlySecureRpcCalls" value 1
-	Set-ItemProperty path $RegPath name "FallbackToUnsecureRPCIfNecessary" value 0
-}
-
-Restart-Service MSDTC
-Write-Host "MSDTC has been configured" foregroundcolor green

README.md

@@ -3,7 +3,7 @@
 [![AppVeyor](https://ci.appveyor.com/api/projects/status/4mpe0tbu7n126vyw?svg=true)](https://ci.appveyor.com/project/yuleyule66/cap)
 [![NuGet](https://img.shields.io/nuget/v/DotNetCore.CAP.svg)](https://www.nuget.org/packages/DotNetCore.CAP/)
 [![NuGet Preview](https://img.shields.io/nuget/vpre/DotNetCore.CAP.svg?label=nuget-pre)](https://www.nuget.org/packages/DotNetCore.CAP/)
-[![Member project of .NET China Foundation](https://img.shields.io/badge/member_project_of-.NET_CHINA-red.svg?style=flat&colorB=9E20C8)](https://github.com/dotnetcore)
+[![Member project of .NET Core Community](https://img.shields.io/badge/member%20project%20of-NCC-9e20c9.svg)](https://github.com/dotnetcore)
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/dotnetcore/CAP/master/LICENSE.txt)
 
 CAP is a library based on .Net standard, which is a solution to deal with distributed transactions, also has the function of EventBus, it is lightweight, easy to use, and efficiently.
@@ -187,7 +187,10 @@ Then inject your  `ISubscriberService`  class in Startup.cs
 ```c#
 public void ConfigureServices(IServiceCollection services)
 {
+    //Note: The injection of services needs before of `services.AddCap()`
     services.AddTransient<ISubscriberService,SubscriberService>();
+	
+    services.AddCap(x=>{});
 }
 ```
 
@@ -218,6 +221,8 @@ services.AddCap(x =>
 });
 ```
 
+The default dashboard address is :[http://localhost:xxx/cap](http://localhost:xxx/cap) , you can also change the `cap` suffix to others with `d.MatchPath` configuration options.
+
 ![dashboard](http://images2017.cnblogs.com/blog/250417/201710/250417-20171004220827302-189215107.png)
 
 ![received](http://images2017.cnblogs.com/blog/250417/201710/250417-20171004220934115-1107747665.png)

README.zh-cn.md

@@ -3,7 +3,7 @@
 [![AppVeyor](https://ci.appveyor.com/api/projects/status/4mpe0tbu7n126vyw?svg=true)](https://ci.appveyor.com/project/yuleyule66/cap)
 [![NuGet](https://img.shields.io/nuget/v/DotNetCore.CAP.svg)](https://www.nuget.org/packages/DotNetCore.CAP/)
 [![NuGet Preview](https://img.shields.io/nuget/vpre/DotNetCore.CAP.svg?label=nuget-pre)](https://www.nuget.org/packages/DotNetCore.CAP/)
-[![Member project of .NET China Foundation](https://img.shields.io/badge/member_project_of-.NET_CHINA-red.svg?style=flat&colorB=9E20C8)](https://github.com/dotnetcore)
+[![Member project of .NET Core Community](https://img.shields.io/badge/member%20project%20of-NCC-9e20c9.svg)](https://github.com/dotnetcore)
 [![GitHub license](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/dotnetcore/CAP/master/LICENSE.txt)
 
 CAP 是一个基于 .NET Standard 的 C# 库，它是一种处理分布式事务的解决方案，同样具有 EventBus 的功能，它具有轻量级、易使用、高性能等特点。
@@ -187,7 +187,10 @@ namespace xxx.Service
 ```c#
 public void ConfigureServices(IServiceCollection services)
 {
+    //注意: 注入的服务需要在 `services.AddCap()` 之前
     services.AddTransient<ISubscriberService,SubscriberService>();
+	
+    services.AddCap(x=>{});
 }
 ```
 
@@ -218,6 +221,8 @@ services.AddCap(x =>
 });
 ```
 
+仪表盘默认的访问地址是：[http://localhost:xxx/cap](http://localhost:xxx/cap)，你可以在`d.MatchPath`配置项中修改`cap`路径后缀为其他的名字。
+
 ![dashboard](http://images2017.cnblogs.com/blog/250417/201710/250417-20171004220827302-189215107.png)
 
 ![received](http://images2017.cnblogs.com/blog/250417/201710/250417-20171004220934115-1107747665.png)

appveyor.yml

@@ -11,7 +11,6 @@ services:
   - mysql
   - postgresql
 build_script:
-- ps: ./ConfigureMSDTC.ps1
 - ps: ./build.ps1
 test: off
 artifacts:

build.cake

@@ -68,6 +68,7 @@ Task("Pack")
 	{
 		Configuration = build.Configuration,
 		VersionSuffix = build.Version.Suffix,
+		IncludeSymbols = true,
 		OutputDirectory = "./artifacts/packages"
 	};
 	foreach (var project in build.ProjectFiles)

build/version.props

 <Project>
 	<PropertyGroup>
 		<VersionMajor>2</VersionMajor>
-		<VersionMinor>1</VersionMinor>
+		<VersionMinor>2</VersionMinor>
 		<VersionPatch>3</VersionPatch>
 		<VersionQuality></VersionQuality>
 		<VersionPrefix>$(VersionMajor).$(VersionMinor).$(VersionPatch)</VersionPrefix>

samples/Sample.Kafka.MySql/Controllers/ValuesController.cs

+using System;
+using System.Threading.Tasks;
+using DotNetCore.CAP;
+using Microsoft.AspNetCore.Mvc;
+using MySql.Data.MySqlClient;
+
+namespace Sample.Kafka.MySql.Controllers
+{
+    [Route("api/[controller]")]
+    public class ValuesController : Controller, ICapSubscribe
+    {
+        private readonly ICapPublisher _capBus;
+
+        public ValuesController(ICapPublisher producer)
+        {
+            _capBus = producer;
+        }
+
+        [Route("~/publish")]
+        public async Task<IActionResult> PublishMessage()
+        {
+            using (var connection = new MySqlConnection("Server=192.168.10.110;Database=testcap;UserId=root;Password=123123;"))
+            {
+                connection.Open();
+                var transaction = connection.BeginTransaction();
+
+                //your business code here
+
+                await _capBus.PublishAsync("xxx.xxx.test2", 123456, transaction);
+
+                transaction.Commit();
+            }
+
+            return Ok("publish successful!");
+        }
+
+        [CapSubscribe("xxx.xxx.test2")]
+        public void Test2(int value)
+        {
+            Console.WriteLine("Subscriber output message: " + value);
+        }
+    }
+}
\ No newline at end of file

samples/Sample.RabbitMQ.SqlServer/Program.cs → samples/Sample.Kafka.MySql/Program.cs

-using System.IO;
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
+using NLog.Web;
 
-namespace Sample.RabbitMQ.SqlServer
+namespace Sample.Kafka.MySql
 {
     public class Program
     {
@@ -16,9 +14,12 @@ namespace Sample.RabbitMQ.SqlServer
 
         public static IWebHost BuildWebHost(string[] args) =>
             WebHost.CreateDefaultBuilder(args)
-                .UseUrls("http://*:5800")
                 .UseStartup<Startup>()
+                .ConfigureLogging((hostingContext, builder) =>
+                {
+                    hostingContext.HostingEnvironment.ConfigureNLog("nlog.config");
+                })
+                .UseNLog()
                 .Build();
-
     }
 }
\ No newline at end of file

samples/Sample.Kafka.SqlServer/Sample.Kafka.SqlServer.csproj → samples/Sample.Kafka.MySql/Sample.Kafka.MySql.csproj

@@ -2,21 +2,28 @@
 
   <PropertyGroup>
     <TargetFramework>netcoreapp2.0</TargetFramework>
-    <AssemblyName>Sample.Kafka.SqlServer</AssemblyName>
+    <AssemblyName>Sample.Kafka.MySql</AssemblyName>
     <WarningsAsErrors>NU1701</WarningsAsErrors>
     <NoWarn>NU1701</NoWarn>
   </PropertyGroup>
  
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.3" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.6" />
+    <PackageReference Include="MySqlConnector" Version="0.40.3" />
+    <PackageReference Include="NLog.Web.AspNetCore" Version="4.5.2" />
   </ItemGroup>
   <ItemGroup>
     <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\DotNetCore.CAP.Kafka\DotNetCore.CAP.Kafka.csproj" />
-    <ProjectReference Include="..\..\src\DotNetCore.CAP.SqlServer\DotNetCore.CAP.SqlServer.csproj" />
+    <ProjectReference Include="..\..\src\DotNetCore.CAP.MySql\DotNetCore.CAP.MySql.csproj" />
     <ProjectReference Include="..\..\src\DotNetCore.CAP\DotNetCore.CAP.csproj" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Update="nlog.config">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
 
 </Project>

samples/Sample.RabbitMQ.PostgreSql/Startup.cs → samples/Sample.Kafka.MySql/Startup.cs

 using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
 using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 
-namespace Sample.RabbitMQ.PostgreSql
+namespace Sample.Kafka.MySql
 {
     public class Startup
     {
-        // This method gets called by the runtime. Use this method to add services to the container.
         public void ConfigureServices(IServiceCollection services)
         {
-            services.AddDbContext<AppDbContext>();
             services.AddCap(x =>
             {
-                x.UseEntityFramework<AppDbContext>();
-                x.UseRabbitMQ("localhost");
+                x.UseMySql("Server=localhost;Database=testcap;UserId=root;Password=123123;");
+                x.UseKafka("localhost:9092");
                 x.UseDashboard();
-                x.UseDiscovery(d =>
-                {
-                    d.DiscoveryServerHostName = "localhost";
-                    d.DiscoveryServerPort = 8500;
-                    d.CurrentNodeHostName = "localhost";
-                    d.CurrentNodePort = 5800;
-                    d.NodeName = "CAP 一号节点";
-                });
             });
+
             services.AddMvc();
         }
 
-        // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env)
+        public void Configure(IApplicationBuilder app)
         {
             app.UseMvc();
 

samples/Sample.Kafka.MySql/appsettings.json

+{
+  "Logging": {
+    "IncludeScopes": false,
+    "LogLevel": {
+      "Default": "Debug"
+    }
+  }
+}

samples/Sample.Kafka.SqlServer/AppDbContext.cs

-using Microsoft.EntityFrameworkCore;
-
-namespace Sample.Kafka.SqlServer
-{
-    public class AppDbContext : DbContext
-    {
-
-        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        {
-           //optionsBuilder.UseSqlServer("Server=192.168.2.206;Initial Catalog=Sample.Kafka.SqlServer;User Id=cmswuliu;Password=h7xY81agBn*Veiu3;MultipleActiveResultSets=True");
-           optionsBuilder.UseSqlServer("Server=192.168.2.206;Initial Catalog=TestCap;User Id=cmswuliu;Password=h7xY81agBn*Veiu3;MultipleActiveResultSets=True");
-        }
-    }
-}

samples/Sample.Kafka.SqlServer/CmsContentSerializer.cs

-using System;
-using DotNetCore.CAP.Abstractions;
-using DotNetCore.CAP.Models;
-using Newtonsoft.Json;
-
-namespace Sample.RabbitMQ.SqlServer
-{
-    public class MessageContent : CapMessage
-    {
-        [JsonProperty("id")]
-        public override string Id { get; set; }
-
-        [JsonProperty("createdTime")]
-        public override DateTime Timestamp { get; set; }
-
-        [JsonProperty("msgBody")]
-        public override string Content { get; set; }
-
-        [JsonProperty("callbackTopicName")]
-        public override string CallbackName { get; set; }
-    }
-
-    public class MyMessagePacker : IMessagePacker
-    {
-        private readonly IContentSerializer _serializer;
-
-        public MyMessagePacker(IContentSerializer serializer)
-        {
-            _serializer = serializer;
-        }
-
-        public string Pack(CapMessage obj)
-        {
-            var content = new MessageContent
-            {
-                Id = obj.Id,
-                Content = obj.Content,
-                CallbackName = obj.CallbackName,
-                Timestamp = obj.Timestamp
-            };
-            return _serializer.Serialize(content);
-        }
-
-        public CapMessage UnPack(string packingMessage)
-        {
-            return _serializer.DeSerialize<MessageContent>(packingMessage);
-        }
-    }
-}
-

samples/Sample.Kafka.SqlServer/Controllers/ValuesController.cs

-using System;
-using System.Diagnostics;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-using Microsoft.AspNetCore.Authorization;
-using Microsoft.AspNetCore.Mvc;
-using Newtonsoft.Json;
-
-namespace Sample.Kafka.SqlServer.Controllers
-{
-    public class Person
-    {
-        [JsonProperty("id")]
-        public string Id { get; set; }
-
-        [JsonProperty("uname")]
-        public string Name { get; set; }
-
-        public HAHA Haha { get; set; }
-
-        public override string ToString()
-        {
-            return "Name:" + Name + ";Id:" + Id + "Haha:" + Haha?.ToString();
-        }
-    }
-
-    public class HAHA
-    {
-        [JsonProperty("id")]
-        public string Id { get; set; }
-
-        [JsonProperty("uname")]
-        public string Name { get; set; }
-        public override string ToString()
-        {
-            return "Name:" + Name + ";Id:" + Id;
-        }
-    }
-
-
-    [Route("api/[controller]")]
-    public class ValuesController : Controller, ICapSubscribe
-    {
-        private readonly ICapPublisher _capBus;
-        private readonly AppDbContext _dbContext;
-
-        public ValuesController(ICapPublisher producer, AppDbContext dbContext)
-        {
-            _capBus = producer;
-            _dbContext = dbContext;
-        }
-
-
-        [Route("~/publish")]
-        public IActionResult PublishMessage()
-        {
-            var p = new Person
-            {
-                Id = Guid.NewGuid().ToString(),
-                Name = "杨晓东",
-                Haha = new HAHA
-                {
-                    Id = Guid.NewGuid().ToString(),
-                    Name = "1-1杨晓东",
-                }
-            };
-
-            _capBus.Publish("wl.yxd.test", p, "wl.yxd.test.callback");
-
-
-            //_capBus.Publish("wl.cj.test", p);
-            return Ok();
-        }
-
-        [CapSubscribe("wl.yxd.test.callback")]
-        public void KafkaTestCallback(Person p)
-        {
-            Console.WriteLine("回调内容：" + p);
-        }
-
-
-        [CapSubscribe("wl.cj.test")]
-        public string KafkaTestReceived(Person person)
-        {
-            Console.WriteLine(person);
-            Debug.WriteLine(person);
-            return "this is callback message";
-        }
-
-        [Route("~/publishWithTrans")]
-        public async Task<IActionResult> PublishMessageWithTransaction()
-        {
-            using (var trans = await _dbContext.Database.BeginTransactionAsync())
-            {
-                await _capBus.PublishAsync("sample.rabbitmq.mysql", "");
-
-                trans.Commit();
-            }
-            return Ok();
-        }
-
-        [CapSubscribe("sample.rabbitmq.mysql33333", Group = "Test.Group")]
-        public void KafkaTest22(Person person)
-        {
-            var aa = _dbContext.Database;
-
-            _dbContext.Dispose();
-
-            Console.WriteLine("[sample.kafka.sqlserver] message received   " + person.ToString());
-            Debug.WriteLine("[sample.kafka.sqlserver] message received   " + person.ToString());
-        }
-
-        //[CapSubscribe("sample.rabbitmq.mysql22222")]
-        //public void KafkaTest22(DateTime time)
-        //{
-        //    Console.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-        //    Debug.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-        //}
-
-        [CapSubscribe("sample.rabbitmq.mysql22222")]
-        public async Task<DateTime> KafkaTest33(DateTime time)
-        {
-            Console.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-            Debug.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-            return await Task.FromResult(time);
-        }
-
-        [NonAction]
-        [CapSubscribe("sample.kafka.sqlserver3")]
-        [CapSubscribe("sample.kafka.sqlserver4")]
-        public void KafkaTest()
-        {
-            Console.WriteLine("[sample.kafka.sqlserver] message received");
-            Debug.WriteLine("[sample.kafka.sqlserver] message received");
-        }
-    }
-}
\ No newline at end of file

samples/Sample.Kafka.SqlServer/Program.cs

-using System.IO;
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-
-namespace Sample.Kafka.SqlServer
-{
-    public class Program
-    {
- 
-        public static void Main(string[] args)
-        { 
-            BuildWebHost(args).Run();
-        }
-
-        public static IWebHost BuildWebHost(string[] args) =>
-            WebHost.CreateDefaultBuilder(args)
-                .UseStartup<Startup>()
-                .Build();
-
-    }
-}
\ No newline at end of file

samples/Sample.Kafka.SqlServer/Startup.cs

-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Logging;
-using Sample.RabbitMQ.SqlServer;
-
-namespace Sample.Kafka.SqlServer
-{
-    public class Startup
-    {
-        public void ConfigureServices(IServiceCollection services)
-        {
-            services.AddDbContext<AppDbContext>();
-
-            services.AddCap(x =>
-            {
-                x.UseEntityFramework<AppDbContext>();
-                x.UseKafka("192.168.2.215:9092");
-                x.UseDashboard();
-                //x.UseDiscovery(d =>
-                //{
-                //    d.DiscoveryServerHostName = "localhost";
-                //    d.DiscoveryServerPort = 8500;
-                //    d.CurrentNodeHostName = "localhost";
-                //    d.CurrentNodePort = 5820;
-                //    d.NodeName = "CAP 2号节点";
-                //});
-            }).AddMessagePacker<MyMessagePacker>();
-            services.AddMvc();
-        }
-
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
-        {
-            app.UseMvc();
-
-            app.UseCap();
-        }
-    }
-}
\ No newline at end of file

samples/Sample.RabbitMQ.MySql/AppDbContext.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.EntityFrameworkCore;
+using Microsoft.EntityFrameworkCore;
 
 namespace Sample.RabbitMQ.MySql
 {
@@ -10,8 +6,7 @@ namespace Sample.RabbitMQ.MySql
     {
         protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
         {
-            optionsBuilder.UseMySql("Server=localhost;Database=Sample.RabbitMQ.MySql;UserId=root;Password=123123;Allow User Variables=True");
-            //optionsBuilder.UseMySql("Server=192.168.2.206;Database=Sample.RabbitMQ.MySql;UserId=root;Password=123123;");
+            optionsBuilder.UseMySql("Server=localhost;Database=testcap;UserId=root;Password=123123;");
         }
     }
 }

samples/Sample.RabbitMQ.MySql/Controllers/ValuesController.cs

 using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Linq;
 using System.Threading.Tasks;
 using DotNetCore.CAP;
 using Microsoft.AspNetCore.Mvc;
@@ -53,7 +50,7 @@ namespace Sample.RabbitMQ.MySql.Controllers
         [CapSubscribe("sample.rabbitmq.mysql")]
         public void ReceiveMessage(DateTime time)
         {
-            Console.WriteLine("[sample.rabbitmq.mysql] message received: "+ DateTime.Now.ToString() +" , sent time: " + time.ToString());
+            Console.WriteLine("[sample.rabbitmq.mysql] message received: " + DateTime.Now + ",sent time: " + time);
         }
     }
 }

samples/Sample.RabbitMQ.MySql/Program.cs

-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore;
 using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
+using NLog.Web;
 
 namespace Sample.RabbitMQ.MySql
 {
@@ -20,6 +14,11 @@ namespace Sample.RabbitMQ.MySql
         public static IWebHost BuildWebHost(string[] args) =>
             WebHost.CreateDefaultBuilder(args)
                 .UseStartup<Startup>()
+                .ConfigureLogging((hostingContext, builder) =>
+                {
+                    hostingContext.HostingEnvironment.ConfigureNLog("nlog.config");
+                })
+                .UseNLog()
                 .Build();
     }
 }

samples/Sample.RabbitMQ.MySql/Properties/launchSettings.json

+{
+  "iisSettings": {
+    "windowsAuthentication": false,
+    "anonymousAuthentication": true,
+    "iisExpress": {
+      "applicationUrl": "http://localhost:57171/",
+      "sslPort": 0
+    }
+  },
+  "profiles": {
+    "IIS Express": {
+      "commandName": "IISExpress",
+      "launchBrowser": true,
+      "launchUrl": "cap",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      }
+    },
+    "Sample.RabbitMQ.MySql": {
+      "commandName": "Project",
+      "launchBrowser": true,
+      "launchUrl": "cap",
+      "environmentVariables": {
+        "ASPNETCORE_ENVIRONMENT": "Development"
+      },
+      "applicationUrl": "http://localhost:57173/"
+    }
+  }
+}
\ No newline at end of file

samples/Sample.RabbitMQ.MySql/Sample.RabbitMQ.MySql.csproj

@@ -10,8 +10,9 @@
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.3" />
+    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.6" />
     <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="2.0.1" />
+    <PackageReference Include="NLog.Web.AspNetCore" Version="4.5.2" />
   </ItemGroup>
   <ItemGroup>
     <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
@@ -21,5 +22,10 @@
     <ProjectReference Include="..\..\src\DotNetCore.CAP.RabbitMQ\DotNetCore.CAP.RabbitMQ.csproj" />
     <ProjectReference Include="..\..\src\DotNetCore.CAP\DotNetCore.CAP.csproj" />
   </ItemGroup>
+  <ItemGroup>
+    <Content Update="nlog.config">
+      <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
+    </Content>
+  </ItemGroup>
 
 </Project>

samples/Sample.RabbitMQ.MySql/Startup.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore.Builder;
+using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
 using Microsoft.Extensions.DependencyInjection;
 using Microsoft.Extensions.Logging;

samples/Sample.RabbitMQ.MySql/appsettings.json

+{
+  "Logging": {
+    "IncludeScopes": false,
+    "LogLevel": {
+      "Default": "Debug"
+    }
+  }
+}

samples/Sample.RabbitMQ.PostgreSql/AppDbContext.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.EntityFrameworkCore;
-
-namespace Sample.RabbitMQ.PostgreSql
-{
-    public class AppDbContext : DbContext
-    {
-        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        {
-            optionsBuilder.UseNpgsql("Server=localhost;Database=Sample.RabbitMQ.PostgreSql;UserId=postgres;Password=123123;");
-        }
-    }
-}

samples/Sample.RabbitMQ.PostgreSql/Controllers/ValuesController.cs

-using System;
-using System.Collections.Generic;
-using System.Diagnostics;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-using Microsoft.AspNetCore.Mvc;
-
-namespace Sample.RabbitMQ.PostgreSql.Controllers
-{
-    [Route("api/[controller]")]
-    public class ValuesController : Controller
-    {
-        private readonly AppDbContext _dbContext;
-        private readonly ICapPublisher _capBus;
-
-        public ValuesController(AppDbContext dbContext, ICapPublisher capPublisher)
-        {
-            _dbContext = dbContext;
-            _capBus = capPublisher;
-        }
-
-        [Route("~/publish")]
-        public IActionResult PublishMessage()
-        {
-            _capBus.Publish("sample.rabbitmq.mysql", DateTime.Now);
-
-            return Ok();
-        }
-
-
-        [Route("~/publish2")]
-        public IActionResult PublishMessage2()
-        {
-            _capBus.Publish("sample.kafka.sqlserver4", DateTime.Now);
-
-            return Ok();
-        }
-
-        [Route("~/publishWithTrans")]
-        public async Task<IActionResult> PublishMessageWithTransaction()
-        {
-            using (var trans = await _dbContext.Database.BeginTransactionAsync())
-            {
-                await _capBus.PublishAsync("sample.kafka.sqlserver", "");
-                
-                trans.Commit();
-            }
-            return Ok();
-        }
-        
-        [NonAction]
-        [CapSubscribe("sample.rabbitmq.mysql")]
-        public void ReceiveMessage()
-        {
-            Console.WriteLine("[sample.rabbitmq.mysql] message received");
-            Debug.WriteLine("[sample.rabbitmq.mysql] message received");
-        }
-    }
-}

samples/Sample.RabbitMQ.PostgreSql/Program.cs

-using System;
-using System.Collections.Generic;
-using System.IO;
-using System.Linq;
-using System.Threading.Tasks;
-using Microsoft.AspNetCore;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.Configuration;
-using Microsoft.Extensions.Logging;
-
-namespace Sample.RabbitMQ.PostgreSql
-{
-    public class Program
-    {
-        public static void Main(string[] args)
-        {
-            BuildWebHost(args).Run();
-        }
-
-        public static IWebHost BuildWebHost(string[] args) =>
-            WebHost.CreateDefaultBuilder(args)
-                .UseStartup<Startup>()
-                .Build();
-    }
-}

samples/Sample.RabbitMQ.PostgreSql/Sample.RabbitMQ.PostgreSql.csproj

-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-  </PropertyGroup>
-
-  <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.3" />
-    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.0.0" />
-  </ItemGroup>
-
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\DotNetCore.CAP.PostgreSql\DotNetCore.CAP.PostgreSql.csproj" />
-    <ProjectReference Include="..\..\src\DotNetCore.CAP.RabbitMQ\DotNetCore.CAP.RabbitMQ.csproj" />
-    <ProjectReference Include="..\..\src\DotNetCore.CAP\DotNetCore.CAP.csproj" />
-  </ItemGroup>
-
-</Project>

samples/Sample.RabbitMQ.SqlServer/AppDbContext.cs

-using Microsoft.EntityFrameworkCore;
-using Sample.RabbitMQ.SqlServer.Controllers;
-
-namespace Sample.RabbitMQ.SqlServer
-{
-    public class AppDbContext : DbContext
-    {
-
-        public DbSet<Person> Persons { get; set; }
-
-        protected override void OnConfiguring(DbContextOptionsBuilder optionsBuilder)
-        {
-           //optionsBuilder.UseSqlServer("Server=192.168.2.206;Initial Catalog=TestCap;User Id=cmswuliu;Password=h7xY81agBn*Veiu3;MultipleActiveResultSets=True");
-            optionsBuilder.UseSqlServer("Server=DESKTOP-M9R8T31;Initial Catalog=Sample.Kafka.SqlServer;User Id=sa;Password=P@ssw0rd;MultipleActiveResultSets=True");
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Controllers/ValuesController.cs

-using System;
-using System.Diagnostics;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-using Microsoft.AspNetCore.Authorization;
-using Microsoft.AspNetCore.Mvc;
-
-namespace Sample.RabbitMQ.SqlServer.Controllers
-{
-    public class Person
-    {
-        public int Id { get; set; }
-        public string Name { get; set; }
-        public int Age { get; set; }
-
-        public override string ToString()
-        {
-            return "Name:" + Name + ";Age:" + Age;
-        }
-    }
-
-
-    [Route("api/[controller]")]
-    public class ValuesController : Controller, ICapSubscribe
-    {
-        private readonly ICapPublisher _capBus;
-        private readonly AppDbContext _dbContext;
-
-        public ValuesController(ICapPublisher producer, AppDbContext dbContext)
-        {
-            _capBus = producer;
-            _dbContext = dbContext;
-        }
-
-        [Route("~/publish")]
-        public IActionResult PublishMessage()
-        {
-
-            _capBus.Publish("sample.rabbitmq.sqlserver.order.check", DateTime.Now);
-
-            //var person = new Person
-            //{
-            //    Name = "杨晓东",
-            //    Age = 11,
-            //    Id = 23
-            //};
-            //_capBus.Publish("sample.rabbitmq.mysql33333", person);
-
-            return Ok();
-        }
-
-        [Route("~/publishWithTrans")]
-        public async Task<IActionResult> PublishMessageWithTransaction()
-        {
-            using (var trans = await _dbContext.Database.BeginTransactionAsync())
-            {
-                await _capBus.PublishAsync("sample.rabbitmq.mysql", "");
-
-                trans.Commit();
-            }
-            return Ok();
-        }
-
-        [CapSubscribe("sample.rabbitmq.mysql33333",Group ="Test.Group")]
-        public void KafkaTest22(Person person)
-        {
-            var aa = _dbContext.Database;
-
-            _dbContext.Dispose();
-
-            Console.WriteLine("[sample.kafka.sqlserver] message received   " + person.ToString());
-            Debug.WriteLine("[sample.kafka.sqlserver] message received   " + person.ToString());
-        }
-
-        //[CapSubscribe("sample.rabbitmq.mysql22222")]
-        //public void KafkaTest22(DateTime time)
-        //{
-        //    Console.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-        //    Debug.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-        //}
-
-        [CapSubscribe("sample.rabbitmq.mysql22222")]
-        public async Task<DateTime> KafkaTest33(DateTime time)
-        {
-            Console.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-            Debug.WriteLine("[sample.kafka.sqlserver] message received   " + time.ToString());
-            return await Task.FromResult(time);
-        }
-
-        [NonAction]
-        [CapSubscribe("sample.kafka.sqlserver3")]
-        [CapSubscribe("sample.kafka.sqlserver4")]
-        public void KafkaTest()
-        {
-            Console.WriteLine("[sample.kafka.sqlserver] message received");
-            Debug.WriteLine("[sample.kafka.sqlserver] message received");
-        }
-    }
-}
\ No newline at end of file

samples/Sample.RabbitMQ.SqlServer/Migrations/20170824130007_AddPersons.Designer.cs

-// <auto-generated />
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Metadata;
-using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Storage;
-using Microsoft.EntityFrameworkCore.Storage.Internal;
-using Sample.RabbitMQ.SqlServer;
-using System;
-
-namespace Sample.RabbitMQ.SqlServer.Migrations
-{
-    [DbContext(typeof(AppDbContext))]
-    [Migration("20170824130007_AddPersons")]
-    partial class AddPersons
-    {
-        protected override void BuildTargetModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "2.0.0-rtm-26452")
-                .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
-
-            modelBuilder.Entity("Sample.RabbitMQ.SqlServer.Controllers.Person", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd();
-
-                    b.Property<int>("Age");
-
-                    b.Property<string>("Name");
-
-                    b.HasKey("Id");
-
-                    b.ToTable("Persons");
-                });
-#pragma warning restore 612, 618
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Migrations/20170824130007_AddPersons.cs

-using Microsoft.EntityFrameworkCore.Metadata;
-using Microsoft.EntityFrameworkCore.Migrations;
-using System;
-using System.Collections.Generic;
-
-namespace Sample.RabbitMQ.SqlServer.Migrations
-{
-    public partial class AddPersons : Migration
-    {
-        protected override void Up(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.CreateTable(
-                name: "Persons",
-                columns: table => new
-                {
-                    Id = table.Column<int>(type: "int", nullable: false)
-                        .Annotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn),
-                    Age = table.Column<int>(type: "int", nullable: false),
-                    Name = table.Column<string>(type: "nvarchar(max)", nullable: true)
-                },
-                constraints: table =>
-                {
-                    table.PrimaryKey("PK_Persons", x => x.Id);
-                });
-        }
-
-        protected override void Down(MigrationBuilder migrationBuilder)
-        {
-            migrationBuilder.DropTable(
-                name: "Persons");
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Migrations/AppDbContextModelSnapshot.cs

-// <auto-generated />
-using Microsoft.EntityFrameworkCore;
-using Microsoft.EntityFrameworkCore.Infrastructure;
-using Microsoft.EntityFrameworkCore.Metadata;
-using Microsoft.EntityFrameworkCore.Migrations;
-using Microsoft.EntityFrameworkCore.Storage;
-using Microsoft.EntityFrameworkCore.Storage.Internal;
-using Sample.RabbitMQ.SqlServer;
-using System;
-
-namespace Sample.RabbitMQ.SqlServer.Migrations
-{
-    [DbContext(typeof(AppDbContext))]
-    partial class AppDbContextModelSnapshot : ModelSnapshot
-    {
-        protected override void BuildModel(ModelBuilder modelBuilder)
-        {
-#pragma warning disable 612, 618
-            modelBuilder
-                .HasAnnotation("ProductVersion", "2.0.0-rtm-26452")
-                .HasAnnotation("SqlServer:ValueGenerationStrategy", SqlServerValueGenerationStrategy.IdentityColumn);
-
-            modelBuilder.Entity("Sample.RabbitMQ.SqlServer.Controllers.Person", b =>
-                {
-                    b.Property<int>("Id")
-                        .ValueGeneratedOnAdd();
-
-                    b.Property<int>("Age");
-
-                    b.Property<string>("Name");
-
-                    b.HasKey("Id");
-
-                    b.ToTable("Persons");
-                });
-#pragma warning restore 612, 618
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Sample.RabbitMQ.SqlServer.csproj

-<Project Sdk="Microsoft.NET.Sdk.Web">
-
-  <PropertyGroup>
-    <TargetFramework>netcoreapp2.0</TargetFramework>
-    <AssemblyName>Sample.RabbitMQ.SqlServer</AssemblyName>
-  </PropertyGroup>
- 
-  <ItemGroup>
-    <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.3" />
-  </ItemGroup>
-  <ItemGroup>
-    <DotNetCliToolReference Include="Microsoft.EntityFrameworkCore.Tools.DotNet" Version="2.0.0" />
-  </ItemGroup>
-  <ItemGroup>
-    <ProjectReference Include="..\..\src\DotNetCore.CAP.RabbitMQ\DotNetCore.CAP.RabbitMQ.csproj" />
-    <ProjectReference Include="..\..\src\DotNetCore.CAP.SqlServer\DotNetCore.CAP.SqlServer.csproj" />
-    <ProjectReference Include="..\..\src\DotNetCore.CAP\DotNetCore.CAP.csproj" />
-  </ItemGroup>
-
-</Project>

samples/Sample.RabbitMQ.SqlServer/Services/ICmsService.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-
-namespace Sample.RabbitMQ.SqlServer.Services
-{
-    public interface ICmsService 
-    {
-        void Add();
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Services/IOrderService.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-
-namespace Sample.RabbitMQ.SqlServer.Services
-{
-    public interface IOrderService
-    {
-        void Check();
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Services/Impl/CmsService.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-
-namespace Sample.RabbitMQ.SqlServer.Services.Impl
-{
-    public class CmsService : ICmsService, ICapSubscribe
-    {
-        public void Add()
-        {
-            throw new NotImplementedException();
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Services/Impl/OrderService.cs

-using System;
-using System.Collections.Generic;
-using System.Linq;
-using System.Threading.Tasks;
-using DotNetCore.CAP;
-
-namespace Sample.RabbitMQ.SqlServer.Services.Impl
-{
-    public class OrderService : IOrderService, ICapSubscribe
-    {
-        [CapSubscribe("sample.rabbitmq.sqlserver.order.check")]
-        public void Check()
-        {
-            Console.WriteLine("out");
-        }
-    }
-}

samples/Sample.RabbitMQ.SqlServer/Startup.cs

-using Microsoft.AspNetCore.Builder;
-using Microsoft.AspNetCore.Hosting;
-using Microsoft.Extensions.DependencyInjection;
-using Microsoft.Extensions.Logging;
-using Sample.RabbitMQ.SqlServer.Services;
-using Sample.RabbitMQ.SqlServer.Services.Impl;
-
-namespace Sample.RabbitMQ.SqlServer
-{
-    public class Startup
-    {
-        public void ConfigureServices(IServiceCollection services)
-        {
-            services.AddDbContext<AppDbContext>();
-
-            services.AddScoped<IOrderService, OrderService>();
-            services.AddTransient<ICmsService, CmsService>();
-
-            services.AddCap(x =>
-            {
-                x.UseEntityFramework<AppDbContext>();
-                x.UseRabbitMQ("localhost");
-                x.UseDashboard();
-                x.UseDiscovery(d =>
-                {
-                    d.DiscoveryServerHostName = "localhost";
-                    d.DiscoveryServerPort = 8500;
-
-                    d.CurrentNodeHostName = "192.168.1.11";
-                    d.CurrentNodePort = 5800;
-                    d.NodeName = "CAP Node Windows";
-                    d.NodeId = 1;
-                });
-            });
-
-            services.AddMvc();
-        }
-
-        public void Configure(IApplicationBuilder app, IHostingEnvironment env, ILoggerFactory loggerFactory)
-        {
-            loggerFactory.AddConsole();
-            loggerFactory.AddDebug();
-
-            app.UseMvc();
-
-            app.UseCap();
-        }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.Kafka/CAP.KafkaCapOptionsExtension.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP.Kafka;
 using Microsoft.Extensions.DependencyInjection;
 
@@ -23,9 +26,9 @@ namespace DotNetCore.CAP
             services.AddSingleton(kafkaOptions);
 
             services.AddSingleton<IConsumerClientFactory, KafkaConsumerClientFactory>();
-            services.AddSingleton<IQueueExecutor, PublishQueueExecutor>();
-            services.AddSingleton<IPublishExecutor, PublishQueueExecutor>();
-            services.AddSingleton<ConnectionPool>();
+            services.AddSingleton<IPublishExecutor, KafkaPublishMessageSender>();
+            services.AddSingleton<IPublishMessageSender, KafkaPublishMessageSender>();
+            services.AddSingleton<IConnectionPool,ConnectionPool>();
         }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.Kafka/CAP.KafkaOptions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Linq;
@@ -45,16 +48,21 @@ namespace DotNetCore.CAP
             if (_kafkaConfig == null)
             {
                 if (string.IsNullOrWhiteSpace(Servers))
+                {
                     throw new ArgumentNullException(nameof(Servers));
+                }
 
                 MainConfig["bootstrap.servers"] = Servers;
                 MainConfig["queue.buffering.max.ms"] = "10";
                 MainConfig["socket.blocking.max.ms"] = "10";
                 MainConfig["enable.auto.commit"] = "false";
                 MainConfig["log.connection.close"] = "false";
+                MainConfig["request.timeout.ms"] = "3000";
+                MainConfig["message.timeout.ms"] = "5000";
 
                 _kafkaConfig = MainConfig.AsEnumerable();
             }
+
             return _kafkaConfig;
         }
     }

src/DotNetCore.CAP.Kafka/CAP.Options.Extensions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP;
 
 // ReSharper disable once CheckNamespace
@@ -24,7 +27,10 @@ namespace Microsoft.Extensions.DependencyInjection
         /// <returns></returns>
         public static CapOptions UseKafka(this CapOptions options, Action<KafkaOptions> configure)
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
             options.RegisterExtension(new KafkaCapOptionsExtension(configure));
 

src/DotNetCore.CAP.Kafka/CAP.SubscribeAttribute.cs

-using DotNetCore.CAP.Abstractions;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using DotNetCore.CAP.Abstractions;
 
 // ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP

src/DotNetCore.CAP.Kafka/DotNetCore.CAP.Kafka.csproj

@@ -8,14 +8,14 @@
     <PackageTags>$(PackageTags);Kafka</PackageTags>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
+  <PropertyGroup>
     <WarningsAsErrors>NU1605;NU1701</WarningsAsErrors>
     <NoWarn>NU1701;CS1591</NoWarn>
-    <DocumentationFile>bin\Debug\netstandard2.0\DotNetCore.CAP.Kafka.xml</DocumentationFile>
+    <DocumentationFile>bin\$(Configuration)\netstandard2.0\DotNetCore.CAP.Kafka.xml</DocumentationFile>
   </PropertyGroup>
 
   <ItemGroup>
-    <PackageReference Include="Confluent.Kafka" Version="0.11.3" />
+    <PackageReference Include="Confluent.Kafka" Version="0.11.4" />
   </ItemGroup>
 
   <ItemGroup>

src/DotNetCore.CAP.Kafka/ConnectionPool.cs → src/DotNetCore.CAP.Kafka/IConnectionPool.Default.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.Threading;
 using Confluent.Kafka;
+using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
 
 namespace DotNetCore.CAP.Kafka
 {
     public class ConnectionPool : IConnectionPool, IDisposable
     {
+        private readonly ILogger<ConnectionPool> _logger;
         private readonly Func<Producer> _activator;
-        private readonly ConcurrentQueue<Producer> _pool = new ConcurrentQueue<Producer>();
+        private readonly ConcurrentQueue<Producer> _pool;
         private int _count;
-
         private int _maxSize;
 
-        public ConnectionPool(KafkaOptions options)
+        public ConnectionPool(ILogger<ConnectionPool> logger, KafkaOptions options)
         {
+            _logger = logger;
+            _pool = new ConcurrentQueue<Producer>();
             _maxSize = options.ConnectionPoolSize;
             _activator = CreateActivator(options);
+            ServersAddress = options.Servers;
+
+            _logger.LogDebug("Kafka configuration of CAP :\r\n {0}",
+                JsonConvert.SerializeObject(options.AsKafkaConfig(), Formatting.Indented));
         }
 
+        public string ServersAddress { get; }
+
         Producer IConnectionPool.Rent()
         {
             return Rent();
@@ -35,8 +48,10 @@ namespace DotNetCore.CAP.Kafka
             _maxSize = 0;
 
             while (_pool.TryDequeue(out var context))
+            {
                 context.Dispose();
             }
+        }
 
         private static Func<Producer> CreateActivator(KafkaOptions options)
         {

src/DotNetCore.CAP.Kafka/IConnectionPool.cs

-
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using Confluent.Kafka;
 
 namespace DotNetCore.CAP.Kafka
 {
     public interface IConnectionPool
     {
+        string ServersAddress { get; }
+
         Producer Rent();
 
         bool Return(Producer context);

src/DotNetCore.CAP.Kafka/PublishQueueExecutor.cs → src/DotNetCore.CAP.Kafka/IPublishMessageSender.Kafka.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Text;
 using System.Threading.Tasks;
+using DotNetCore.CAP.Internal;
 using DotNetCore.CAP.Processor.States;
 using Microsoft.Extensions.Logging;
 
 namespace DotNetCore.CAP.Kafka
 {
-    internal class PublishQueueExecutor : BasePublishQueueExecutor
+    internal class KafkaPublishMessageSender : BasePublishMessageSender
     {
-        private readonly ConnectionPool _connectionPool;
+        private readonly IConnectionPool _connectionPool;
         private readonly ILogger _logger;
 
-        public PublishQueueExecutor(
-            CapOptions options,
-            IStateChanger stateChanger,
-            ConnectionPool connectionPool,
-            ILogger<PublishQueueExecutor> logger)
-            : base(options, stateChanger, logger)
+        public KafkaPublishMessageSender(
+            CapOptions options, IStateChanger stateChanger, IStorageConnection connection,
+            IConnectionPool connectionPool, ILogger<KafkaPublishMessageSender> logger)
+            : base(logger, options, connection, stateChanger)
         {
             _logger = logger;
             _connectionPool = connectionPool;
+            ServersAddress = _connectionPool.ServersAddress;
         }
 
         public override async Task<OperateResult> PublishAsync(string keyName, string content)
         {
             var producer = _connectionPool.Rent();
+
             try
             {
                 var contentBytes = Encoding.UTF8.GetBytes(content);
-
                 var message = await producer.ProduceAsync(keyName, null, contentBytes);
 
-                if (!message.Error.HasError)
+                if (message.Error.HasError)
                 {
+                    throw new PublisherSentFailedException(message.Error.ToString());
+                }
+
                 _logger.LogDebug($"kafka topic message [{keyName}] has been published.");
 
                 return OperateResult.Success;
             }
-                return OperateResult.Failed(new OperateError
-                {
-                    Code = message.Error.Code.ToString(),
-                    Description = message.Error.Reason
-                });
-
-            }
             catch (Exception ex)
             {
-                _logger.LogError(ex,
-                    $"An error occurred during sending the topic message to kafka. Topic:[{keyName}], Exception: {ex.Message}");
+                var wapperEx = new PublisherSentFailedException(ex.Message, ex);
 
-                return OperateResult.Failed(ex);
+                return OperateResult.Failed(wapperEx);
             }
             finally
             {
                 var returned = _connectionPool.Return(producer);
                 if (!returned)
+                {
                     producer.Dispose();
                 }
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.Kafka/KafkaConsumerClient.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Threading;
@@ -26,13 +29,19 @@ namespace DotNetCore.CAP.Kafka
 
         public event EventHandler<LogMessageEventArgs> OnLog;
 
+        public string ServersAddress => _kafkaOptions.Servers;
+
         public void Subscribe(IEnumerable<string> topics)
         {
             if (topics == null)
+            {
                 throw new ArgumentNullException(nameof(topics));
+            }
 
             if (_consumerClient == null)
+            {
                 InitKafkaClient();
+            }
 
             _consumerClient.Subscribe(topics);
         }
@@ -44,6 +53,7 @@ namespace DotNetCore.CAP.Kafka
                 cancellationToken.ThrowIfCancellationRequested();
                 _consumerClient.Poll(timeout);
             }
+
             // ReSharper disable once FunctionNeverReturns
         }
 
@@ -54,7 +64,7 @@ namespace DotNetCore.CAP.Kafka
 
         public void Reject()
         {
-            // Ignore, Kafka will not commit offset when not commit.
+            _consumerClient.Assign(_consumerClient.Assignment);
         }
 
         public void Dispose()
@@ -65,6 +75,8 @@ namespace DotNetCore.CAP.Kafka
         #region private methods
 
         private void InitKafkaClient()
+        {
+            lock (_kafkaOptions)
             {
                 _kafkaOptions.MainConfig["group.id"] = _groupId;
 
@@ -74,7 +86,7 @@ namespace DotNetCore.CAP.Kafka
                 _consumerClient.OnMessage += ConsumerClient_OnMessage;
                 _consumerClient.OnError += ConsumerClient_OnError;
             }
-
+        }
 
         private void ConsumerClient_OnConsumeError(object sender, Message e)
         {

src/DotNetCore.CAP.Kafka/KafkaConsumerClientFactory.cs

-namespace DotNetCore.CAP.Kafka
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+namespace DotNetCore.CAP.Kafka
 {
     internal sealed class KafkaConsumerClientFactory : IConsumerClientFactory
     {

src/DotNetCore.CAP.MySql/CAP.EFOptions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 
 // ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP
 {
     public class EFOptions
     {
+        public const string DefaultSchema = "cap";
+
+        /// <summary>
+        /// Gets or sets the table name prefix to use when creating database objects.
+        /// </summary>
+        public string TableNamePrefix { get; set; } = DefaultSchema;
+
         /// <summary>
         /// EF db context type.
         /// </summary>

src/DotNetCore.CAP.MySql/CAP.MySqlCapOptionsExtension.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP.MySql;
 using DotNetCore.CAP.Processor;
 using Microsoft.EntityFrameworkCore;
@@ -23,24 +26,34 @@ namespace DotNetCore.CAP
             services.AddSingleton<IStorageConnection, MySqlStorageConnection>();
             services.AddScoped<ICapPublisher, CapPublisher>();
             services.AddScoped<ICallbackPublisher, CapPublisher>();
-            services.AddTransient<IAdditionalProcessor, DefaultAdditionalProcessor>();
+            services.AddTransient<ICollectProcessor, MySqlCollectProcessor>();
+
+            AddSingletionMySqlOptions(services);
+        }
 
+        private void AddSingletionMySqlOptions(IServiceCollection services)
+        {
             var mysqlOptions = new MySqlOptions();
+
             _configure(mysqlOptions);
 
             if (mysqlOptions.DbContextType != null)
+            {
                 services.AddSingleton(x =>
                 {
                     using (var scope = x.CreateScope())
                     {
                         var provider = scope.ServiceProvider;
-                        var dbContext = (DbContext) provider.GetService(mysqlOptions.DbContextType);
+                        var dbContext = (DbContext)provider.GetService(mysqlOptions.DbContextType);
                         mysqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
                         return mysqlOptions;
                     }
                 });
+            }
             else
+            {
                 services.AddSingleton(mysqlOptions);
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.MySql/CAP.MySqlOptions.cs

-// ReSharper disable once CheckNamespace
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
 
 namespace DotNetCore.CAP
 {
@@ -8,7 +9,5 @@ namespace DotNetCore.CAP
         /// Gets or sets the database's connection string that will be used to store database entities.
         /// </summary>
         public string ConnectionString { get; set; }
-
-        public string TableNamePrefix { get; set; } = "cap";
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.MySql/CAP.Options.Extensions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP;
 using Microsoft.EntityFrameworkCore;
 
@@ -14,7 +17,11 @@ namespace Microsoft.Extensions.DependencyInjection
 
         public static CapOptions UseMySql(this CapOptions options, Action<MySqlOptions> configure)
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
+
 
             options.RegisterExtension(new MySqlCapOptionsExtension(configure));
 
@@ -24,18 +31,22 @@ namespace Microsoft.Extensions.DependencyInjection
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options)
             where TContext : DbContext
         {
-            return options.UseEntityFramework<TContext>(opt => { opt.DbContextType = typeof(TContext); });
+            return options.UseEntityFramework<TContext>(opt => { });
         }
 
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options, Action<EFOptions> configure)
             where TContext : DbContext
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
-
-            var efOptions = new EFOptions {DbContextType = typeof(TContext)};
-            configure(efOptions);
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
-            options.RegisterExtension(new MySqlCapOptionsExtension(configure));
+            options.RegisterExtension(new MySqlCapOptionsExtension(x =>
+            {
+                configure(x);
+                x.DbContextType = typeof(TContext);
+            }));
 
             return options;
         }

src/DotNetCore.CAP.MySql/CapPublisher.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Threading.Tasks;
 using Dapper;
@@ -14,27 +17,31 @@ namespace DotNetCore.CAP.MySql
     public class CapPublisher : CapPublisherBase, ICallbackPublisher
     {
         private readonly DbContext _dbContext;
-        private readonly ILogger _logger;
         private readonly MySqlOptions _options;
 
-        public CapPublisher(IServiceProvider provider,
-            ILogger<CapPublisher> logger,
+        public CapPublisher(ILogger<CapPublisher> logger, IDispatcher dispatcher, IServiceProvider provider,
             MySqlOptions options)
+            : base(logger, dispatcher)
         {
             ServiceProvider = provider;
             _options = options;
-            _logger = logger;
 
-            if (_options.DbContextType == null) return;
+            if (_options.DbContextType == null)
+            {
+                return;
+            }
+
             IsUsingEF = true;
             _dbContext = (DbContext) ServiceProvider.GetService(_options.DbContextType);
         }
 
-        public async Task PublishAsync(CapPublishedMessage message)
+        public async Task PublishCallbackAsync(CapPublishedMessage message)
         {
             using (var conn = new MySqlConnection(_options.ConnectionString))
             {
-                await conn.ExecuteAsync(PrepareSql(), message);
+                var id = await conn.ExecuteScalarAsync<int>(PrepareSql(), message);
+                message.Id = id;
+                Enqueue(message);
             }
         }
 
@@ -51,25 +58,20 @@ namespace DotNetCore.CAP.MySql
                 dbContextTransaction = _dbContext.Database.BeginTransaction(IsolationLevel.ReadCommitted);
                 dbTrans = dbContextTransaction.GetDbTransaction();
             }
+
             DbTransaction = dbTrans;
         }
 
-        protected override void Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override int Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.Execute(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("Published Message has been persisted in the database. name:" + message);
+            return dbConnection.ExecuteScalar<int>(PrepareSql(), message, dbTransaction);
         }
 
-        protected override Task ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override async Task<int> ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.ExecuteAsync(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("Published Message has been persisted in the database. name:" + message);
-
-            return Task.CompletedTask;
+            return await dbConnection.ExecuteScalarAsync<int>(PrepareSql(), message, dbTransaction);
         }
 
         #region private methods
@@ -77,7 +79,7 @@ namespace DotNetCore.CAP.MySql
         private string PrepareSql()
         {
             return
-                $"INSERT INTO `{_options.TableNamePrefix}.published` (`Name`,`Content`,`Retries`,`Added`,`ExpiresAt`,`StatusName`)VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName)";
+                $"INSERT INTO `{_options.TableNamePrefix}.published` (`Name`,`Content`,`Retries`,`Added`,`ExpiresAt`,`StatusName`)VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName);SELECT LAST_INSERT_ID()";
         }
 
         #endregion private methods

src/DotNetCore.CAP.MySql/DotNetCore.CAP.MySql.csproj

@@ -8,16 +8,16 @@
     <PackageTags>$(PackageTags);MySQL</PackageTags>
   </PropertyGroup>
 
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <DocumentationFile>bin\Debug\netstandard2.0\DotNetCore.CAP.MySql.xml</DocumentationFile>
+  <PropertyGroup>
+    <DocumentationFile>bin\$(Configuration)\netstandard2.0\DotNetCore.CAP.MySql.xml</DocumentationFile>
     <NoWarn>1701;1702;1705;CS1591</NoWarn>
   </PropertyGroup>
 
   <ItemGroup>
     <PackageReference Include="Dapper" Version="1.50.4" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.1" />
-    <PackageReference Include="MySqlConnector" Version="0.33.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.2" />
+    <PackageReference Include="MySqlConnector" Version="0.40.3" />
   </ItemGroup>
 
   <ItemGroup>

src/DotNetCore.CAP.MySql/FetchedMessage.cs

-using DotNetCore.CAP.Models;
-
-namespace DotNetCore.CAP.MySql
-{
-    internal class FetchedMessage
-    {
-        public int MessageId { get; set; }
-
-        public MessageType MessageType { get; set; }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.MySql/IAdditionalProcessor.Default.cs → src/DotNetCore.CAP.MySql/ICollectProcessor.MySql.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Threading.Tasks;
 using Dapper;
 using DotNetCore.CAP.Processor;
@@ -7,7 +10,7 @@ using MySql.Data.MySqlClient;
 
 namespace DotNetCore.CAP.MySql
 {
-    internal class DefaultAdditionalProcessor : IAdditionalProcessor
+    internal class MySqlCollectProcessor : ICollectProcessor
     {
         private const int MaxBatch = 1000;
         private readonly TimeSpan _delay = TimeSpan.FromSeconds(1);
@@ -15,7 +18,7 @@ namespace DotNetCore.CAP.MySql
         private readonly MySqlOptions _options;
         private readonly TimeSpan _waitingInterval = TimeSpan.FromMinutes(5);
 
-        public DefaultAdditionalProcessor(ILogger<DefaultAdditionalProcessor> logger,
+        public MySqlCollectProcessor(ILogger<MySqlCollectProcessor> logger,
             MySqlOptions mysqlOptions)
         {
             _logger = logger;
@@ -24,8 +27,6 @@ namespace DotNetCore.CAP.MySql
 
         public async Task ProcessAsync(ProcessingContext context)
         {
-            _logger.LogDebug("Collecting expired entities.");
-
             var tables = new[]
             {
                 $"{_options.TableNamePrefix}.published",
@@ -34,6 +35,8 @@ namespace DotNetCore.CAP.MySql
 
             foreach (var table in tables)
             {
+                _logger.LogDebug($"Collecting expired data from table [{table}].");
+               
                 int removedCount;
                 do
                 {

src/DotNetCore.CAP.MySql/MySqlFetchedMessage.cs

-using Dapper;
-using DotNetCore.CAP.Models;
-using MySql.Data.MySqlClient;
-
-namespace DotNetCore.CAP.MySql
-{
-    public class MySqlFetchedMessage : IFetchedMessage
-    {
-        private readonly MySqlOptions _options;
-        private readonly string _processId;
-
-        public MySqlFetchedMessage(int messageId, MessageType type, string processId, MySqlOptions options)
-        {
-            MessageId = messageId;
-            MessageType = type;
-
-            _processId = processId;
-            _options = options;
-        }
-
-        public int MessageId { get; }
-
-        public MessageType MessageType { get; }
-
-        public void RemoveFromQueue()
-        {
-            using (var connection = new MySqlConnection(_options.ConnectionString))
-            {
-                connection.Execute($"DELETE FROM `{_options.TableNamePrefix}.queue` WHERE `ProcessId`=@ProcessId"
-                    , new { ProcessId = _processId });
-            } 
-        }
-
-        public void Requeue()
-        {
-            using (var connection = new MySqlConnection(_options.ConnectionString))
-            {
-                connection.Execute($"UPDATE `{_options.TableNamePrefix}.queue` SET `ProcessId`=NULL WHERE `ProcessId`=@ProcessId"
-                    , new { ProcessId = _processId });
-            }
-        }
-
-        public void Dispose()
-        {
-            // ignored
-        }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.MySql/MySqlMonitoringApi.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -28,9 +31,7 @@ set transaction isolation level read committed;
 select count(Id) from `{0}.published` where StatusName = N'Succeeded';
 select count(Id) from `{0}.received` where StatusName = N'Succeeded';
 select count(Id) from `{0}.published` where StatusName = N'Failed';
-select count(Id) from `{0}.received` where StatusName = N'Failed';
-select count(Id) from `{0}.published` where StatusName in (N'Processing',N'Scheduled',N'Enqueued');
-select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Scheduled',N'Enqueued');", _prefix);
+select count(Id) from `{0}.received` where StatusName = N'Failed';", _prefix);
 
             var statistics = UseConnection(connection =>
             {
@@ -42,10 +43,8 @@ select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Sched
 
                     stats.PublishedFailed = multi.ReadSingle<int>();
                     stats.ReceivedFailed = multi.ReadSingle<int>();
-
-                    stats.PublishedProcessing = multi.ReadSingle<int>();
-                    stats.ReceivedProcessing = multi.ReadSingle<int>();
                 }
+
                 return stats;
             });
             return statistics;
@@ -70,17 +69,24 @@ select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Sched
             var tableName = queryDto.MessageType == MessageType.Publish ? "published" : "received";
             var where = string.Empty;
             if (!string.IsNullOrEmpty(queryDto.StatusName))
-                if (string.Equals(queryDto.StatusName, StatusName.Processing,
-                    StringComparison.CurrentCultureIgnoreCase))
-                    where += " and StatusName in (N'Processing',N'Scheduled',N'Enqueued')";
-                else
+            {
                 where += " and StatusName=@StatusName";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Name))
+            {
                 where += " and Name=@Name";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Group))
+            {
                 where += " and Group=@Group";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Content))
+            {
                 where += " and Content like '%@Content%'";
+            }
 
             var sqlQuery =
                 $"select * from `{_prefix}.{tableName}` where 1=1 {where} order by Added desc limit @Limit offset @Offset";
@@ -101,11 +107,6 @@ select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Sched
             return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Failed));
         }
 
-        public int PublishedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Processing));
-        }
-
         public int PublishedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Succeeded));
@@ -116,11 +117,6 @@ select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Sched
             return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Failed));
         }
 
-        public int ReceivedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Processing));
-        }
-
         public int ReceivedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Succeeded));
@@ -128,9 +124,7 @@ select count(Id) from `{0}.received` where StatusName  in (N'Processing',N'Sched
 
         private int GetNumberOfMessage(IDbConnection connection, string tableName, string statusName)
         {
-            var sqlQuery = statusName == StatusName.Processing
-                ? $"select count(Id) from `{_prefix}.{tableName}` where StatusName in (N'Processing',N'Scheduled',N'Enqueued')"
-                : $"select count(Id) from `{_prefix}.{tableName}` where StatusName = @state";
+            var sqlQuery = $"select count(Id) from `{_prefix}.{tableName}` where StatusName = @state";
 
             var count = connection.ExecuteScalar<int>(sqlQuery, new {state = statusName});
             return count;
@@ -179,7 +173,12 @@ select aggr.* from (
                 .ToDictionary(x => (string) x.Key, x => (int) x.Count);
 
             foreach (var key in keyMaps.Keys)
-                if (!valuesMap.ContainsKey(key)) valuesMap.Add(key, 0);
+            {
+                if (!valuesMap.ContainsKey(key))
+                {
+                    valuesMap.Add(key, 0);
+                }
+            }
 
             var result = new Dictionary<DateTime, int>();
             for (var i = 0; i < keyMaps.Count; i++)

src/DotNetCore.CAP.MySql/MySqlStorage.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Data;
 using System.Threading;
@@ -11,10 +14,10 @@ namespace DotNetCore.CAP.MySql
 {
     public class MySqlStorage : IStorage
     {
+        private readonly CapOptions _capOptions;
         private readonly IDbConnection _existingConnection = null;
         private readonly ILogger _logger;
         private readonly MySqlOptions _options;
-        private readonly CapOptions _capOptions;
 
         public MySqlStorage(ILogger<MySqlStorage> logger,
             MySqlOptions options,
@@ -37,7 +40,11 @@ namespace DotNetCore.CAP.MySql
 
         public async Task InitializeAsync(CancellationToken cancellationToken)
         {
-            if (cancellationToken.IsCancellationRequested) return;
+            if (cancellationToken.IsCancellationRequested)
+            {
+                return;
+            }
+
             var sql = CreateDbTablesScript(_options.TableNamePrefix);
             using (var connection = new MySqlConnection(_options.ConnectionString))
             {
@@ -51,11 +58,7 @@ namespace DotNetCore.CAP.MySql
         {
             var batchSql =
                 $@"
-CREATE TABLE IF NOT EXISTS `{prefix}.queue` (
-  `MessageId` int(11) NOT NULL,
-  `MessageType` tinyint(4) NOT NULL,
-  `ProcessId` varchar(50) DEFAULT NULL
-) ENGINE=InnoDB DEFAULT CHARSET=utf8;
+DROP TABLE IF EXISTS `{prefix}.queue`;
 
 CREATE TABLE IF NOT EXISTS `{prefix}.received` (
   `Id` int(127) NOT NULL AUTO_INCREMENT,
@@ -102,7 +105,9 @@ CREATE TABLE IF NOT EXISTS `{prefix}.published` (
             var connection = _existingConnection ?? new MySqlConnection(_options.ConnectionString);
 
             if (connection.State == ConnectionState.Closed)
+            {
                 connection.Open();
+            }
 
             return connection;
         }
@@ -115,7 +120,9 @@ CREATE TABLE IF NOT EXISTS `{prefix}.published` (
         internal void ReleaseConnection(IDbConnection connection)
         {
             if (connection != null && !IsExistingConnection(connection))
+            {
                 connection.Dispose();
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.MySql/MySqlStorageConnection.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Collections.Generic;
 using System.Threading.Tasks;
@@ -13,8 +16,6 @@ namespace DotNetCore.CAP.MySql
         private readonly CapOptions _capOptions;
         private readonly string _prefix;
 
-        private const string DateTimeMaxValue = "9999-12-31 23:59:59";
-
         public MySqlStorageConnection(MySqlOptions options, CapOptions capOptions)
         {
             _capOptions = capOptions;
@@ -39,50 +40,32 @@ namespace DotNetCore.CAP.MySql
             }
         }
 
-        public Task<IFetchedMessage> FetchNextMessageAsync()
+        public async Task<IEnumerable<CapPublishedMessage>> GetPublishedMessagesOfNeedRetry()
         {
-            var processId = ObjectId.GenerateNewStringId();
-            var sql = $@"
-UPDATE `{_prefix}.queue` SET `ProcessId`=@ProcessId WHERE `ProcessId` IS NULL LIMIT 1;
-SELECT `MessageId`,`MessageType` FROM `{_prefix}.queue` WHERE `ProcessId`=@ProcessId;";
-
-            return FetchNextMessageCoreAsync(sql, processId);
-        }
-
-        public async Task<CapPublishedMessage> GetNextPublishedMessageToBeEnqueuedAsync()
-        {
-            var sql = $@"
-UPDATE `{_prefix}.published` SET Id=LAST_INSERT_ID(Id),ExpiresAt='{DateTimeMaxValue}' WHERE ExpiresAt IS NULL AND `StatusName` = '{StatusName.Scheduled}' LIMIT 1;
-SELECT * FROM `{_prefix}.published` WHERE Id=LAST_INSERT_ID();";
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
+            var sql =
+                $"SELECT * FROM `{_prefix}.published` WHERE `Retries`<{_capOptions.FailedRetryCount} AND `Added`<'{fourMinsAgo}' AND (`StatusName` = '{StatusName.Failed}' OR `StatusName` = '{StatusName.Scheduled}') LIMIT 200;";
 
             using (var connection = new MySqlConnection(Options.ConnectionString))
             {
-                connection.Execute("SELECT LAST_INSERT_ID(0)");
-                return await connection.QueryFirstOrDefaultAsync<CapPublishedMessage>(sql);
+                return await connection.QueryAsync<CapPublishedMessage>(sql);
             }
         }
 
-        public async Task<IEnumerable<CapPublishedMessage>> GetFailedPublishedMessages()
+        public async Task<int> StoreReceivedMessageAsync(CapReceivedMessage message)
         {
-            var sql = $"SELECT * FROM `{_prefix}.published` WHERE `Retries`<{_capOptions.FailedRetryCount} AND `StatusName` = '{StatusName.Failed}' LIMIT 200;";
-
-            using (var connection = new MySqlConnection(Options.ConnectionString))
+            if (message == null)
             {
-                return await connection.QueryAsync<CapPublishedMessage>(sql);
+                throw new ArgumentNullException(nameof(message));
             }
-        }
-
-        public async Task StoreReceivedMessageAsync(CapReceivedMessage message)
-        {
-            if (message == null) throw new ArgumentNullException(nameof(message));
 
             var sql = $@"
 INSERT INTO `{_prefix}.received`(`Name`,`Group`,`Content`,`Retries`,`Added`,`ExpiresAt`,`StatusName`)
-VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
+VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);SELECT LAST_INSERT_ID();";
 
             using (var connection = new MySqlConnection(Options.ConnectionString))
             {
-                await connection.ExecuteAsync(sql, message);
+                return await connection.ExecuteScalarAsync<int>(sql, message);
             }
         }
 
@@ -95,22 +78,11 @@ VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
             }
         }
 
-        public async Task<CapReceivedMessage> GetNextReceivedMessageToBeEnqueuedAsync()
+        public async Task<IEnumerable<CapReceivedMessage>> GetReceivedMessagesOfNeedRetry()
         {
-            var sql = $@"
-UPDATE `{_prefix}.received` SET Id=LAST_INSERT_ID(Id),ExpiresAt='{DateTimeMaxValue}' WHERE ExpiresAt IS NULL AND `StatusName` = '{StatusName.Scheduled}' LIMIT 1;
-SELECT * FROM `{_prefix}.received` WHERE Id=LAST_INSERT_ID();";
-
-            using (var connection = new MySqlConnection(Options.ConnectionString))
-            {
-                connection.Execute("SELECT LAST_INSERT_ID(0)");
-                return await connection.QueryFirstOrDefaultAsync<CapReceivedMessage>(sql);
-            }
-        }
-
-        public async Task<IEnumerable<CapReceivedMessage>> GetFailedReceivedMessages()
-        {
-            var sql = $"SELECT * FROM `{_prefix}.received` WHERE `Retries`<{_capOptions.FailedRetryCount} AND `StatusName` = '{StatusName.Failed}' LIMIT 200;";
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
+            var sql =
+                $"SELECT * FROM `{_prefix}.received` WHERE `Retries`<{_capOptions.FailedRetryCount} AND `Added`<'{fourMinsAgo}' AND (`StatusName` = '{StatusName.Failed}' OR `StatusName` = '{StatusName.Scheduled}') LIMIT 200;";
             using (var connection = new MySqlConnection(Options.ConnectionString))
             {
                 return await connection.QueryAsync<CapReceivedMessage>(sql);
@@ -139,20 +111,6 @@ SELECT * FROM `{_prefix}.received` WHERE Id=LAST_INSERT_ID();";
             }
         }
 
-        private async Task<IFetchedMessage> FetchNextMessageCoreAsync(string sql, string processId)
-        {
-            FetchedMessage fetchedMessage;
-            using (var connection = new MySqlConnection(Options.ConnectionString))
-            {
-                fetchedMessage = await connection.QuerySingleOrDefaultAsync<FetchedMessage>(sql, new { ProcessId = processId });
-            }
-
-            if (fetchedMessage == null)
-                return null;
-
-            return new MySqlFetchedMessage(fetchedMessage.MessageId, fetchedMessage.MessageType, processId, Options);
-        }
-
         public void Dispose()
         {
         }

src/DotNetCore.CAP.MySql/MySqlStorageTransaction.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Threading.Tasks;
 using Dapper;
@@ -11,7 +14,7 @@ namespace DotNetCore.CAP.MySql
     {
         private readonly IDbConnection _dbConnection;
 
-        private readonly IDbTransaction _dbTransaction;
+        //private readonly IDbTransaction _dbTransaction;
         private readonly string _prefix;
 
         public MySqlStorageTransaction(MySqlStorageConnection connection)
@@ -20,55 +23,45 @@ namespace DotNetCore.CAP.MySql
             _prefix = options.TableNamePrefix;
 
             _dbConnection = new MySqlConnection(options.ConnectionString);
-            _dbConnection.Open();
-            _dbTransaction = _dbConnection.BeginTransaction(IsolationLevel.ReadCommitted);
+            // _dbConnection.Open();    for performance
+            // _dbTransaction = _dbConnection.BeginTransaction(IsolationLevel.ReadCommitted);
         }
 
         public void UpdateMessage(CapPublishedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql =
                 $"UPDATE `{_prefix}.published` SET `Retries` = @Retries,`Content`= @Content,`ExpiresAt` = @ExpiresAt,`StatusName`=@StatusName WHERE `Id`=@Id;";
-            _dbConnection.Execute(sql, message, _dbTransaction);
+            _dbConnection.Execute(sql, message);
         }
 
         public void UpdateMessage(CapReceivedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
-
-            var sql =
-                $"UPDATE `{_prefix}.received` SET `Retries` = @Retries,`Content`= @Content,`ExpiresAt` = @ExpiresAt,`StatusName`=@StatusName WHERE `Id`=@Id;";
-            _dbConnection.Execute(sql, message, _dbTransaction);
-        }
-
-        public void EnqueueMessage(CapPublishedMessage message)
+            if (message == null)
             {
-            if (message == null) throw new ArgumentNullException(nameof(message));
-
-            var sql = $"INSERT INTO `{_prefix}.queue`(`MessageId`,`MessageType`) values(@MessageId,@MessageType);";
-            _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Publish},
-                _dbTransaction);
+                throw new ArgumentNullException(nameof(message));
             }
 
-        public void EnqueueMessage(CapReceivedMessage message)
-        {
-            if (message == null) throw new ArgumentNullException(nameof(message));
-
-            var sql = $"INSERT INTO `{_prefix}.queue`(`MessageId`,`MessageType`) values(@MessageId,@MessageType);";
-            _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Subscribe},
-                _dbTransaction);
+            var sql =
+                $"UPDATE `{_prefix}.received` SET `Retries` = @Retries,`Content`= @Content,`ExpiresAt` = @ExpiresAt,`StatusName`=@StatusName WHERE `Id`=@Id;";
+            _dbConnection.Execute(sql, message);
         }
 
         public Task CommitAsync()
         {
-            _dbTransaction.Commit();
+            _dbConnection.Close();
+            _dbConnection.Dispose();
+            //_dbTransaction.Commit();
             return Task.CompletedTask;
         }
 
         public void Dispose()
         {
-            _dbTransaction.Dispose();
+            //_dbTransaction.Dispose();
             _dbConnection.Dispose();
         }
     }

src/DotNetCore.CAP.PostgreSql/CAP.EFOptions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 
 // ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP

src/DotNetCore.CAP.PostgreSql/CAP.Options.Extensions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP;
 using Microsoft.EntityFrameworkCore;
 
@@ -14,7 +17,10 @@ namespace Microsoft.Extensions.DependencyInjection
 
         public static CapOptions UsePostgreSql(this CapOptions options, Action<PostgreSqlOptions> configure)
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
             options.RegisterExtension(new PostgreSqlCapOptionsExtension(configure));
 
@@ -24,18 +30,22 @@ namespace Microsoft.Extensions.DependencyInjection
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options)
             where TContext : DbContext
         {
-            return options.UseEntityFramework<TContext>(opt => { opt.DbContextType = typeof(TContext); });
+            return options.UseEntityFramework<TContext>(opt => { });
         }
 
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options, Action<EFOptions> configure)
             where TContext : DbContext
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
-
-            var efOptions = new EFOptions {DbContextType = typeof(TContext)};
-            configure(efOptions);
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
-            options.RegisterExtension(new PostgreSqlCapOptionsExtension(configure));
+            options.RegisterExtension(new PostgreSqlCapOptionsExtension(x =>
+            {
+                configure(x);
+                x.DbContextType = typeof(TContext);
+            }));
 
             return options;
         }

src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlCapOptionsExtension.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP.PostgreSql;
 using DotNetCore.CAP.Processor;
 using Microsoft.EntityFrameworkCore;
@@ -23,24 +26,33 @@ namespace DotNetCore.CAP
             services.AddSingleton<IStorageConnection, PostgreSqlStorageConnection>();
             services.AddScoped<ICapPublisher, CapPublisher>();
             services.AddScoped<ICallbackPublisher, CapPublisher>();
-            services.AddTransient<IAdditionalProcessor, DefaultAdditionalProcessor>();
+            services.AddTransient<ICollectProcessor, PostgreSqlCollectProcessor>();
+
+            AddSingletonPostgreSqlOptions(services);
+        }
 
+        private void AddSingletonPostgreSqlOptions(IServiceCollection services)
+        {
             var postgreSqlOptions = new PostgreSqlOptions();
             _configure(postgreSqlOptions);
 
             if (postgreSqlOptions.DbContextType != null)
+            {
                 services.AddSingleton(x =>
                 {
                     using (var scope = x.CreateScope())
                     {
                         var provider = scope.ServiceProvider;
-                        var dbContext = (DbContext)provider.GetService(postgreSqlOptions.DbContextType);
+                        var dbContext = (DbContext) provider.GetService(postgreSqlOptions.DbContextType);
                         postgreSqlOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
                         return postgreSqlOptions;
                     }
                 });
+            }
             else
+            {
                 services.AddSingleton(postgreSqlOptions);
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.PostgreSql/CAP.PostgreSqlOptions.cs

-// ReSharper disable once CheckNamespace
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
 
 namespace DotNetCore.CAP
 {

src/DotNetCore.CAP.PostgreSql/CapPublisher.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Threading.Tasks;
 using Dapper;
@@ -14,16 +17,14 @@ namespace DotNetCore.CAP.PostgreSql
     public class CapPublisher : CapPublisherBase, ICallbackPublisher
     {
         private readonly DbContext _dbContext;
-        private readonly ILogger _logger;
         private readonly PostgreSqlOptions _options;
 
-        public CapPublisher(IServiceProvider provider,
-            ILogger<CapPublisher> logger,
-            PostgreSqlOptions options)
+        public CapPublisher(ILogger<CapPublisher> logger, IDispatcher dispatcher,
+            IServiceProvider provider, PostgreSqlOptions options)
+            : base(logger, dispatcher)
         {
             ServiceProvider = provider;
             _options = options;
-            _logger = logger;
 
             if (_options.DbContextType != null)
             {
@@ -32,11 +33,13 @@ namespace DotNetCore.CAP.PostgreSql
             }
         }
 
-        public async Task PublishAsync(CapPublishedMessage message)
+        public async Task PublishCallbackAsync(CapPublishedMessage message)
         {
             using (var conn = new NpgsqlConnection(_options.ConnectionString))
             {
-                await conn.ExecuteAsync(PrepareSql(), message);
+                var id = await conn.ExecuteScalarAsync<int>(PrepareSql(), message);
+                message.Id = id;
+                Enqueue(message);
             }
         }
 
@@ -53,25 +56,20 @@ namespace DotNetCore.CAP.PostgreSql
                 dbContextTransaction = _dbContext.Database.BeginTransaction(IsolationLevel.ReadCommitted);
                 dbTrans = dbContextTransaction.GetDbTransaction();
             }
+
             DbTransaction = dbTrans;
         }
 
-        protected override void Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override int Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.Execute(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("Published Message has been persisted in the database. name:" + message);
+            return dbConnection.ExecuteScalar<int>(PrepareSql(), message, dbTransaction);
         }
 
-        protected override Task ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override Task<int> ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.ExecuteAsync(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("Published Message has been persisted in the database. name:" + message);
-
-            return Task.CompletedTask;
+            return dbConnection.ExecuteScalarAsync<int>(PrepareSql(), message, dbTransaction);
         }
 
         #region private methods
@@ -79,7 +77,7 @@ namespace DotNetCore.CAP.PostgreSql
         private string PrepareSql()
         {
             return
-                $"INSERT INTO \"{_options.Schema}\".\"published\" (\"Name\",\"Content\",\"Retries\",\"Added\",\"ExpiresAt\",\"StatusName\")VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName)";
+                $"INSERT INTO \"{_options.Schema}\".\"published\" (\"Name\",\"Content\",\"Retries\",\"Added\",\"ExpiresAt\",\"StatusName\")VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName) RETURNING \"Id\";";
         }
 
         #endregion private methods

src/DotNetCore.CAP.PostgreSql/DotNetCore.CAP.PostgreSql.csproj

@@ -8,16 +8,16 @@
     <PackageTags>$(PackageTags);PostgreSQL</PackageTags>
   </PropertyGroup>
   
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <DocumentationFile>bin\Debug\netstandard2.0\DotNetCore.CAP.PostgreSql.xml</DocumentationFile>
+  <PropertyGroup>
+    <DocumentationFile>bin\$(Configuration)\netstandard2.0\DotNetCore.CAP.PostgreSql.xml</DocumentationFile>
     <NoWarn>1701;1702;1705;CS1591</NoWarn>
   </PropertyGroup>
   
   <ItemGroup>
     <PackageReference Include="Dapper" Version="1.50.4" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.1" />
-    <PackageReference Include="Npgsql" Version="3.2.6" /> 
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.2" />
+    <PackageReference Include="Npgsql" Version="3.2.7" /> 
   </ItemGroup>
 
   <ItemGroup>

src/DotNetCore.CAP.PostgreSql/FetchedMessage.cs

-using DotNetCore.CAP.Models;
-
-namespace DotNetCore.CAP.PostgreSql
-{
-    internal class FetchedMessage
-    {
-        public int MessageId { get; set; }
-
-        public MessageType MessageType { get; set; }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.PostgreSql/IAdditionalProcessor.Default.cs → src/DotNetCore.CAP.PostgreSql/ICollectlProcessor.PostgreSql.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Threading.Tasks;
 using Dapper;
 using DotNetCore.CAP.Processor;
@@ -7,7 +10,7 @@ using Npgsql;
 
 namespace DotNetCore.CAP.PostgreSql
 {
-    internal class DefaultAdditionalProcessor : IAdditionalProcessor
+    internal class PostgreSqlCollectProcessor : ICollectProcessor
     {
         private const int MaxBatch = 1000;
 
@@ -21,7 +24,7 @@ namespace DotNetCore.CAP.PostgreSql
         private readonly PostgreSqlOptions _options;
         private readonly TimeSpan _waitingInterval = TimeSpan.FromMinutes(5);
 
-        public DefaultAdditionalProcessor(ILogger<DefaultAdditionalProcessor> logger,
+        public PostgreSqlCollectProcessor(ILogger<PostgreSqlCollectProcessor> logger,
             PostgreSqlOptions sqlServerOptions)
         {
             _logger = logger;
@@ -30,10 +33,10 @@ namespace DotNetCore.CAP.PostgreSql
 
         public async Task ProcessAsync(ProcessingContext context)
         {
-            _logger.LogDebug("Collecting expired entities.");
-
             foreach (var table in Tables)
             {
+                _logger.LogDebug($"Collecting expired data from table [{_options.Schema}].[{table}].");
+
                 var removedCount = 0;
                 do
                 {

src/DotNetCore.CAP.PostgreSql/PostgreSqlFetchedMessage.cs

-using System;
-using System.Data;
-using System.Threading;
-using Dapper;
-using DotNetCore.CAP.Models;
-
-namespace DotNetCore.CAP.PostgreSql
-{
-    public class PostgreSqlFetchedMessage : IFetchedMessage
-    {
-        private static readonly TimeSpan KeepAliveInterval = TimeSpan.FromMinutes(1);
-        private readonly IDbConnection _connection;
-        private readonly object _lockObject = new object();
-        private readonly Timer _timer;
-        private readonly IDbTransaction _transaction;
-
-        public PostgreSqlFetchedMessage(int messageId,
-            MessageType type,
-            IDbConnection connection,
-            IDbTransaction transaction)
-        {
-            MessageId = messageId;
-            MessageType = type;
-            _connection = connection;
-            _transaction = transaction;
-            _timer = new Timer(ExecuteKeepAliveQuery, null, KeepAliveInterval, KeepAliveInterval);
-        }
-
-        public int MessageId { get; }
-
-        public MessageType MessageType { get; }
-
-        public void RemoveFromQueue()
-        {
-            lock (_lockObject)
-            {
-                _transaction.Commit();
-            }
-        }
-
-        public void Requeue()
-        {
-            lock (_lockObject)
-            {
-                _transaction.Rollback();
-            }
-        }
-
-        public void Dispose()
-        {
-            lock (_lockObject)
-            {
-                _timer?.Dispose();
-                _transaction.Dispose();
-                _connection.Dispose();
-            }
-        }
-
-        private void ExecuteKeepAliveQuery(object obj)
-        {
-            lock (_lockObject)
-            {
-                try
-                {
-                    _connection?.Execute("SELECT 1", _transaction);
-                }
-                catch
-                {
-                    // ignored
-                }
-            }
-        }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.PostgreSql/PostgreSqlMonitoringApi.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -27,9 +30,7 @@ namespace DotNetCore.CAP.PostgreSql
 select count(""Id"") from ""{0}"".""published"" where ""StatusName"" = N'Succeeded';
 select count(""Id"") from ""{0}"".""received""  where ""StatusName"" = N'Succeeded';
 select count(""Id"") from ""{0}"".""published"" where ""StatusName"" = N'Failed';
-select count(""Id"") from ""{0}"".""received""  where ""StatusName"" = N'Failed';
-select count(""Id"") from ""{0}"".""published"" where ""StatusName"" in (N'Processing',N'Scheduled',N'Enqueued');
-select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Processing',N'Scheduled',N'Enqueued');",
+select count(""Id"") from ""{0}"".""received""  where ""StatusName"" = N'Failed';",
                 _options.Schema);
 
             var statistics = UseConnection(connection =>
@@ -42,10 +43,8 @@ select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Proce
 
                     stats.PublishedFailed = multi.ReadSingle<int>();
                     stats.ReceivedFailed = multi.ReadSingle<int>();
-
-                    stats.PublishedProcessing = multi.ReadSingle<int>();
-                    stats.ReceivedProcessing = multi.ReadSingle<int>();
                 }
+
                 return stats;
             });
             return statistics;
@@ -57,17 +56,24 @@ select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Proce
             var where = string.Empty;
 
             if (!string.IsNullOrEmpty(queryDto.StatusName))
-                if (string.Equals(queryDto.StatusName, StatusName.Processing,
-                    StringComparison.CurrentCultureIgnoreCase))
-                    where += " and \"StatusName\" in (N'Processing',N'Scheduled',N'Enqueued')";
-                else
+            {
                 where += " and Lower(\"StatusName\") = Lower(@StatusName)";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Name))
+            {
                 where += " and Lower(\"Name\") = Lower(@Name)";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Group))
+            {
                 where += " and Lower(\"Group\") = Lower(@Group)";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Content))
+            {
                 where += " and \"Content\" ILike '%@Content%'";
+            }
 
             var sqlQuery =
                 $"select * from \"{_options.Schema}\".\"{tableName}\" where 1=1 {where} order by \"Added\" desc offset @Offset limit @Limit";
@@ -88,11 +94,6 @@ select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Proce
             return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Failed));
         }
 
-        public int PublishedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Processing));
-        }
-
         public int PublishedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "published", StatusName.Succeeded));
@@ -103,11 +104,6 @@ select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Proce
             return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Failed));
         }
 
-        public int ReceivedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Processing));
-        }
-
         public int ReceivedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "received", StatusName.Succeeded));
@@ -129,11 +125,10 @@ select count(""Id"") from ""{0}"".""received""  where ""StatusName"" in (N'Proce
 
         private int GetNumberOfMessage(IDbConnection connection, string tableName, string statusName)
         {
-            var sqlQuery = statusName == StatusName.Processing
-                ? $"select count(\"Id\") from \"{_options.Schema}\".\"{tableName}\" where \"StatusName\" in (N'Processing',N'Scheduled',N'Enqueued')"
-                : $"select count(\"Id\") from \"{_options.Schema}\".\"{tableName}\" where Lower(\"StatusName\") = Lower(@state)";
+            var sqlQuery =
+                $"select count(\"Id\") from \"{_options.Schema}\".\"{tableName}\" where Lower(\"StatusName\") = Lower(@state)";
 
-            var count = connection.ExecuteScalar<int>(sqlQuery, new { state = statusName });
+            var count = connection.ExecuteScalar<int>(sqlQuery, new {state = statusName});
             return count;
         }
 
@@ -175,12 +170,17 @@ with aggr as (
 )
 select ""Key"",""Count"" from aggr where ""Key""= Any(@keys);";
 
-            var valuesMap = connection.Query(sqlQuery,new { keys = keyMaps.Keys.ToList(), statusName })
+            var valuesMap = connection.Query(sqlQuery, new {keys = keyMaps.Keys.ToList(), statusName})
                 .ToList()
-                    .ToDictionary(x => (string)x.Key, x => (int)x.Count);
+                .ToDictionary(x => (string) x.Key, x => (int) x.Count);
 
             foreach (var key in keyMaps.Keys)
-                if (!valuesMap.ContainsKey(key)) valuesMap.Add(key, 0);
+            {
+                if (!valuesMap.ContainsKey(key))
+                {
+                    valuesMap.Add(key, 0);
+                }
+            }
 
             var result = new Dictionary<DateTime, int>();
             for (var i = 0; i < keyMaps.Count; i++)

src/DotNetCore.CAP.PostgreSql/PostgreSqlStorage.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Data;
 using System.Threading;
@@ -11,9 +14,9 @@ namespace DotNetCore.CAP.PostgreSql
 {
     public class PostgreSqlStorage : IStorage
     {
+        private readonly CapOptions _capOptions;
         private readonly IDbConnection _existingConnection = null;
         private readonly ILogger _logger;
-        private readonly CapOptions _capOptions;
         private readonly PostgreSqlOptions _options;
 
         public PostgreSqlStorage(ILogger<PostgreSqlStorage> logger,
@@ -37,7 +40,10 @@ namespace DotNetCore.CAP.PostgreSql
 
         public async Task InitializeAsync(CancellationToken cancellationToken)
         {
-            if (cancellationToken.IsCancellationRequested) return;
+            if (cancellationToken.IsCancellationRequested)
+            {
+                return;
+            }
 
             var sql = CreateDbTablesScript(_options.Schema);
 
@@ -45,6 +51,7 @@ namespace DotNetCore.CAP.PostgreSql
             {
                 await connection.ExecuteAsync(sql);
             }
+
             _logger.LogDebug("Ensuring all create database tables script are applied.");
         }
 
@@ -68,7 +75,9 @@ namespace DotNetCore.CAP.PostgreSql
             var connection = _existingConnection ?? new NpgsqlConnection(_options.ConnectionString);
 
             if (connection.State == ConnectionState.Closed)
+            {
                 connection.Open();
+            }
 
             return connection;
         }
@@ -81,18 +90,17 @@ namespace DotNetCore.CAP.PostgreSql
         internal void ReleaseConnection(IDbConnection connection)
         {
             if (connection != null && !IsExistingConnection(connection))
+            {
                 connection.Dispose();
             }
+        }
 
         protected virtual string CreateDbTablesScript(string schema)
         {
             var batchSql = $@"
 CREATE SCHEMA IF NOT EXISTS ""{schema}"";
 
-CREATE TABLE IF NOT EXISTS ""{schema}"".""queue""(
-	""MessageId"" int NOT NULL ,
-	""MessageType"" int NOT NULL
-);
+DROP TABLE IF EXISTS ""{schema}"".""queue"";
 
 CREATE TABLE IF NOT EXISTS ""{schema}"".""received""(
 	""Id"" SERIAL PRIMARY KEY NOT NULL,

src/DotNetCore.CAP.PostgreSql/PostgreSqlStorageConnection.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Collections.Generic;
-using System.Data;
 using System.Threading.Tasks;
 using Dapper;
 using DotNetCore.CAP.Infrastructure;
@@ -36,44 +38,31 @@ namespace DotNetCore.CAP.PostgreSql
             }
         }
 
-        public Task<IFetchedMessage> FetchNextMessageAsync()
-        {
-            var sql = $@"DELETE FROM ""{Options.Schema}"".""queue"" WHERE ""MessageId"" = (SELECT ""MessageId"" FROM ""{Options.Schema}"".""queue"" FOR UPDATE SKIP LOCKED LIMIT 1) RETURNING *;";
-            return FetchNextMessageCoreAsync(sql);
-        }
-
-        public async Task<CapPublishedMessage> GetNextPublishedMessageToBeEnqueuedAsync()
+        public async Task<IEnumerable<CapPublishedMessage>> GetPublishedMessagesOfNeedRetry()
         {
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
             var sql =
-                $"SELECT * FROM \"{Options.Schema}\".\"published\" WHERE \"StatusName\" = '{StatusName.Scheduled}' FOR UPDATE SKIP LOCKED LIMIT 1;";
+                $"SELECT * FROM \"{Options.Schema}\".\"published\" WHERE \"Retries\"<{_capOptions.FailedRetryCount} AND \"Added\"<'{fourMinsAgo}' AND (\"StatusName\"='{StatusName.Failed}' OR \"StatusName\"='{StatusName.Scheduled}') LIMIT 200;";
 
             using (var connection = new NpgsqlConnection(Options.ConnectionString))
             {
-                return await connection.QueryFirstOrDefaultAsync<CapPublishedMessage>(sql);
+                return await connection.QueryAsync<CapPublishedMessage>(sql);
             }
         }
 
-        public async Task<IEnumerable<CapPublishedMessage>> GetFailedPublishedMessages()
+        public async Task<int> StoreReceivedMessageAsync(CapReceivedMessage message)
         {
-            var sql =
-                $"SELECT * FROM \"{Options.Schema}\".\"published\" WHERE \"Retries\"<{_capOptions.FailedRetryCount} AND \"StatusName\"='{StatusName.Failed}' LIMIT 200;";
-
-            using (var connection = new NpgsqlConnection(Options.ConnectionString))
+            if (message == null)
             {
-                return await connection.QueryAsync<CapPublishedMessage>(sql);
+                throw new ArgumentNullException(nameof(message));
             }
-        }
-
-        public async Task StoreReceivedMessageAsync(CapReceivedMessage message)
-        {
-            if (message == null) throw new ArgumentNullException(nameof(message));
 
             var sql =
-                $"INSERT INTO \"{Options.Schema}\".\"received\"(\"Name\",\"Group\",\"Content\",\"Retries\",\"Added\",\"ExpiresAt\",\"StatusName\")VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
+                $"INSERT INTO \"{Options.Schema}\".\"received\"(\"Name\",\"Group\",\"Content\",\"Retries\",\"Added\",\"ExpiresAt\",\"StatusName\")VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName) RETURNING \"Id\";";
 
             using (var connection = new NpgsqlConnection(Options.ConnectionString))
             {
-                await connection.ExecuteAsync(sql, message);
+                return await connection.ExecuteScalarAsync<int>(sql, message);
             }
         }
 
@@ -86,20 +75,11 @@ namespace DotNetCore.CAP.PostgreSql
             }
         }
 
-        public async Task<CapReceivedMessage> GetNextReceivedMessageToBeEnqueuedAsync()
-        {
-            var sql =
-                $"SELECT * FROM \"{Options.Schema}\".\"received\" WHERE \"StatusName\" = '{StatusName.Scheduled}' FOR UPDATE SKIP LOCKED LIMIT 1;";
-            using (var connection = new NpgsqlConnection(Options.ConnectionString))
-            {
-                return await connection.QueryFirstOrDefaultAsync<CapReceivedMessage>(sql);
-            }
-        }
-
-        public async Task<IEnumerable<CapReceivedMessage>> GetFailedReceivedMessages()
+        public async Task<IEnumerable<CapReceivedMessage>> GetReceivedMessagesOfNeedRetry()
         {
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
             var sql =
-                $"SELECT * FROM \"{Options.Schema}\".\"received\" WHERE \"Retries\"<{_capOptions.FailedRetryCount} AND \"StatusName\"='{StatusName.Failed}' LIMIT 200;";
+                $"SELECT * FROM \"{Options.Schema}\".\"received\" WHERE \"Retries\"<{_capOptions.FailedRetryCount} AND \"Added\"<'{fourMinsAgo}' AND (\"StatusName\"='{StatusName.Failed}' OR \"StatusName\"='{StatusName.Scheduled}') LIMIT 200;";
             using (var connection = new NpgsqlConnection(Options.ConnectionString))
             {
                 return await connection.QueryAsync<CapReceivedMessage>(sql);
@@ -131,35 +111,5 @@ namespace DotNetCore.CAP.PostgreSql
                 return connection.Execute(sql) > 0;
             }
         }
-
-        private async Task<IFetchedMessage> FetchNextMessageCoreAsync(string sql, object args = null)
-        {
-            //here don't use `using` to dispose
-            var connection = new NpgsqlConnection(Options.ConnectionString);
-            await connection.OpenAsync();
-            var transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
-            FetchedMessage fetchedMessage;
-            try
-            {
-                fetchedMessage = await connection.QueryFirstOrDefaultAsync<FetchedMessage>(sql, args, transaction);
-            }
-            catch (NpgsqlException)
-            {
-                transaction.Dispose();
-                connection.Dispose();
-                throw;
-            }
-
-            if (fetchedMessage == null)
-            {
-                transaction.Rollback();
-                transaction.Dispose();
-                connection.Dispose();
-                return null;
-            }
-
-            return new PostgreSqlFetchedMessage(fetchedMessage.MessageId, fetchedMessage.MessageType, connection,
-                transaction);
-        }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.PostgreSql/PostgreSqlStorageTransaction.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Threading.Tasks;
 using Dapper;
@@ -26,7 +29,10 @@ namespace DotNetCore.CAP.PostgreSql
 
         public void UpdateMessage(CapPublishedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql =
                 $@"UPDATE ""{
@@ -37,7 +43,10 @@ namespace DotNetCore.CAP.PostgreSql
 
         public void UpdateMessage(CapReceivedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql =
                 $@"UPDATE ""{
@@ -46,9 +55,24 @@ namespace DotNetCore.CAP.PostgreSql
             _dbConnection.Execute(sql, message, _dbTransaction);
         }
 
+        public Task CommitAsync()
+        {
+            _dbTransaction.Commit();
+            return Task.CompletedTask;
+        }
+
+        public void Dispose()
+        {
+            _dbTransaction.Dispose();
+            _dbConnection.Dispose();
+        }
+
         public void EnqueueMessage(CapPublishedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql = $@"INSERT INTO ""{_schema}"".""queue"" values(@MessageId,@MessageType);";
             _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Publish},
@@ -57,23 +81,14 @@ namespace DotNetCore.CAP.PostgreSql
 
         public void EnqueueMessage(CapReceivedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql = $@"INSERT INTO ""{_schema}"".""queue"" values(@MessageId,@MessageType);";
             _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Subscribe},
                 _dbTransaction);
         }
-
-        public Task CommitAsync()
-        {
-            _dbTransaction.Commit();
-            return Task.CompletedTask;
-        }
-
-        public void Dispose()
-        {
-            _dbTransaction.Dispose();
-            _dbConnection.Dispose();
-        }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.RabbitMQ/CAP.Options.Extensions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP;
 
 // ReSharper disable once CheckNamespace
@@ -13,7 +16,10 @@ namespace Microsoft.Extensions.DependencyInjection
 
         public static CapOptions UseRabbitMQ(this CapOptions options, Action<RabbitMQOptions> configure)
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
             options.RegisterExtension(new RabbitMQCapOptionsExtension(configure));
 

src/DotNetCore.CAP.RabbitMQ/CAP.RabbiMQOptions.cs

-// ReSharper disable once CheckNamespace
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
 
+// ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP
 {
     public class RabbitMQOptions
@@ -56,7 +58,7 @@ namespace DotNetCore.CAP
         /// <summary>
         /// Topic exchange name when declare a topic exchange.
         /// </summary>
-        public string TopicExchangeName { get; set; } = DefaultExchangeName;
+        public string ExchangeName { get; set; } = DefaultExchangeName;
 
         /// <summary>
         /// Timeout setting for connection attempts (in milliseconds).

src/DotNetCore.CAP.RabbitMQ/CAP.RabbitMQCapOptionsExtension.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP.RabbitMQ;
 using Microsoft.Extensions.DependencyInjection;
 
@@ -24,8 +27,8 @@ namespace DotNetCore.CAP
 
             services.AddSingleton<IConsumerClientFactory, RabbitMQConsumerClientFactory>();
             services.AddSingleton<IConnectionChannelPool, ConnectionChannelPool>();
-            services.AddSingleton<IQueueExecutor, PublishQueueExecutor>();
-            services.AddSingleton<IPublishExecutor, PublishQueueExecutor>();
+            services.AddSingleton<IPublishExecutor, RabbitMQPublishMessageSender>();
+            services.AddSingleton<IPublishMessageSender, RabbitMQPublishMessageSender>();
         }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.RabbitMQ/CAP.SubscribeAttribute.cs

-using DotNetCore.CAP.Abstractions;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using DotNetCore.CAP.Abstractions;
 
 // ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP

src/DotNetCore.CAP.RabbitMQ/DotNetCore.CAP.RabbitMQ.csproj

@@ -8,8 +8,8 @@
     <PackageTags>$(PackageTags);RabbitMQ</PackageTags>
   </PropertyGroup>
   
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <DocumentationFile>bin\Debug\netstandard2.0\DotNetCore.CAP.RabbitMQ.xml</DocumentationFile>
+  <PropertyGroup>
+    <DocumentationFile>bin\$(Configuration)\netstandard2.0\DotNetCore.CAP.RabbitMQ.xml</DocumentationFile>
     <NoWarn>1701;1702;1705;CS1591</NoWarn>
   </PropertyGroup>
 

src/DotNetCore.CAP.RabbitMQ/ConnectionChannelPool.cs → src/DotNetCore.CAP.RabbitMQ/IConnectionChannelPool.Default.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.Threading;
 using Microsoft.Extensions.Logging;
+using Newtonsoft.Json;
 using RabbitMQ.Client;
 
 namespace DotNetCore.CAP.RabbitMQ
@@ -12,19 +16,24 @@ namespace DotNetCore.CAP.RabbitMQ
         private const int DefaultPoolSize = 15;
         private readonly Func<IConnection> _connectionActivator;
         private readonly ILogger<ConnectionChannelPool> _logger;
-        private readonly ConcurrentQueue<IModel> _pool = new ConcurrentQueue<IModel>();
+        private readonly ConcurrentQueue<IModel> _pool;
         private IConnection _connection;
 
         private int _count;
         private int _maxSize;
 
-        public ConnectionChannelPool(ILogger<ConnectionChannelPool> logger,
-            RabbitMQOptions options)
+        public ConnectionChannelPool(ILogger<ConnectionChannelPool> logger, RabbitMQOptions options)
         {
             _logger = logger;
             _maxSize = DefaultPoolSize;
-
+            _pool = new ConcurrentQueue<IModel>();
             _connectionActivator = CreateConnection(options);
+
+            HostAddress = options.HostName + ":" + options.Port;
+            Exchange = options.ExchangeName;
+
+            _logger.LogDebug("RabbitMQ configuration of CAP :\r\n {0}",
+                JsonConvert.SerializeObject(options, Formatting.Indented));
         }
 
         IModel IConnectionChannelPool.Rent()
@@ -37,10 +46,17 @@ namespace DotNetCore.CAP.RabbitMQ
             return Return(connection);
         }
 
+        public string HostAddress { get; }
+
+        public string Exchange { get; }
+
         public IConnection GetConnection()
         {
             if (_connection != null && _connection.IsOpen)
+            {
                 return _connection;
+            }
+
             _connection = _connectionActivator();
             _connection.ConnectionShutdown += RabbitMQ_ConnectionShutdown;
             return _connection;
@@ -51,8 +67,10 @@ namespace DotNetCore.CAP.RabbitMQ
             _maxSize = 0;
 
             while (_pool.TryDequeue(out var context))
+            {
                 context.Dispose();
             }
+        }
 
         private static Func<IConnection> CreateConnection(RabbitMQOptions options)
         {
@@ -73,7 +91,7 @@ namespace DotNetCore.CAP.RabbitMQ
 
         private void RabbitMQ_ConnectionShutdown(object sender, ShutdownEventArgs e)
         {
-            _logger.LogWarning($"RabbitMQ client connection closed! {e}");
+            _logger.LogWarning($"RabbitMQ client connection closed! --> {e.ReplyText}");
         }
 
         public virtual IModel Rent()

src/DotNetCore.CAP.RabbitMQ/IConnectionChannelPool.cs

-using RabbitMQ.Client;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using RabbitMQ.Client;
 
 namespace DotNetCore.CAP.RabbitMQ
 {
     public interface IConnectionChannelPool
     {
+        string HostAddress { get; }
+
+        string Exchange { get; }
+
         IConnection GetConnection();
 
         IModel Rent();

src/DotNetCore.CAP.RabbitMQ/PublishQueueExecutor.cs → src/DotNetCore.CAP.RabbitMQ/IPublishMessageSender.RabbitMQ.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Text;
 using System.Threading.Tasks;
+using DotNetCore.CAP.Internal;
 using DotNetCore.CAP.Processor.States;
 using Microsoft.Extensions.Logging;
 using RabbitMQ.Client;
 
 namespace DotNetCore.CAP.RabbitMQ
 {
-    internal sealed class PublishQueueExecutor : BasePublishQueueExecutor
+    internal sealed class RabbitMQPublishMessageSender : BasePublishMessageSender
     {
         private readonly IConnectionChannelPool _connectionChannelPool;
         private readonly ILogger _logger;
-        private readonly RabbitMQOptions _rabbitMQOptions;
+        private readonly string _exchange;
 
-        public PublishQueueExecutor(ILogger<PublishQueueExecutor> logger, CapOptions options,
-            RabbitMQOptions rabbitMQOptions, IConnectionChannelPool connectionChannelPool, IStateChanger stateChanger)
-            : base(options, stateChanger, logger)
+        public RabbitMQPublishMessageSender(ILogger<RabbitMQPublishMessageSender> logger, CapOptions options,
+            IStorageConnection connection, IConnectionChannelPool connectionChannelPool, IStateChanger stateChanger)
+            : base(logger, options, connection, stateChanger)
         {
             _logger = logger;
             _connectionChannelPool = connectionChannelPool;
-            _rabbitMQOptions = rabbitMQOptions;
+            _exchange = _connectionChannelPool.Exchange;
+            ServersAddress = _connectionChannelPool.HostAddress;
         }
 
         public override Task<OperateResult> PublishAsync(string keyName, string content)
@@ -28,12 +33,8 @@ namespace DotNetCore.CAP.RabbitMQ
             try
             {
                 var body = Encoding.UTF8.GetBytes(content);
-
-                channel.ExchangeDeclare(_rabbitMQOptions.TopicExchangeName, RabbitMQOptions.ExchangeType, true);
-                channel.BasicPublish(_rabbitMQOptions.TopicExchangeName,
-                    keyName,
-                    null,
-                    body);
+                channel.ExchangeDeclare(_exchange, RabbitMQOptions.ExchangeType, true);
+                channel.BasicPublish(_exchange, keyName, null, body);
 
                 _logger.LogDebug($"RabbitMQ topic message [{keyName}] has been published.");
 
@@ -41,22 +42,23 @@ namespace DotNetCore.CAP.RabbitMQ
             }
             catch (Exception ex)
             {
-                _logger.LogError(
-                    $"RabbitMQ topic message [{keyName}] has been raised an exception of sending. the exception is: {ex.Message}");
-
-                return Task.FromResult(OperateResult.Failed(ex,
-                    new OperateError
+                var wapperEx = new PublisherSentFailedException(ex.Message, ex);
+                var errors = new OperateError
                 {
                     Code = ex.HResult.ToString(),
                     Description = ex.Message
-                    }));
+                };
+
+                return Task.FromResult(OperateResult.Failed(wapperEx, errors));
             }
             finally
             {
                 var returned = _connectionChannelPool.Return(channel);
                 if (!returned)
+                {
                     channel.Dispose();
                 }
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.RabbitMQ/RabbitMQConsumerClient.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Text;
 using System.Threading;
@@ -13,9 +16,9 @@ namespace DotNetCore.CAP.RabbitMQ
         private readonly string _exchageName;
         private readonly string _queueName;
         private readonly RabbitMQOptions _rabbitMQOptions;
+        private IModel _channel;
 
         private IConnection _connection;
-        private IModel _channel;
         private ulong _deliveryTag;
 
         public RabbitMQConsumerClient(string queueName,
@@ -25,7 +28,7 @@ namespace DotNetCore.CAP.RabbitMQ
             _queueName = queueName;
             _connectionChannelPool = connectionChannelPool;
             _rabbitMQOptions = options;
-            _exchageName = options.TopicExchangeName;
+            _exchageName = options.ExchangeName;
 
             InitClient();
         }
@@ -34,13 +37,20 @@ namespace DotNetCore.CAP.RabbitMQ
 
         public event EventHandler<LogMessageEventArgs> OnLog;
 
+        public string ServersAddress => _rabbitMQOptions.HostName;
+
         public void Subscribe(IEnumerable<string> topics)
         {
-            if (topics == null) throw new ArgumentNullException(nameof(topics));
+            if (topics == null)
+            {
+                throw new ArgumentNullException(nameof(topics));
+            }
 
             foreach (var topic in topics)
+            {
                 _channel.QueueBind(_queueName, _exchageName, topic);
             }
+        }
 
         public void Listening(TimeSpan timeout, CancellationToken cancellationToken)
         {
@@ -58,6 +68,7 @@ namespace DotNetCore.CAP.RabbitMQ
                 cancellationToken.ThrowIfCancellationRequested();
                 cancellationToken.WaitHandle.WaitOne(timeout);
             }
+
             // ReSharper disable once FunctionNeverReturns
         }
 
@@ -88,8 +99,9 @@ namespace DotNetCore.CAP.RabbitMQ
                 RabbitMQOptions.ExchangeType,
                 true);
 
-            var arguments = new Dictionary<string, object> {
-                { "x-message-ttl", _rabbitMQOptions.QueueMessageExpires }
+            var arguments = new Dictionary<string, object>
+            {
+                {"x-message-ttl", _rabbitMQOptions.QueueMessageExpires}
             };
             _channel.QueueDeclare(_queueName, true, false, false, arguments);
         }
@@ -143,7 +155,7 @@ namespace DotNetCore.CAP.RabbitMQ
             var args = new LogMessageEventArgs
             {
                 LogType = MqLogType.ConsumerShutdown,
-                Reason = e.ToString()
+                Reason =  e.ReplyText
             };
             OnLog?.Invoke(sender, args);
         }

src/DotNetCore.CAP.RabbitMQ/RabbitMQConsumerClientFactory.cs

-namespace DotNetCore.CAP.RabbitMQ
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+namespace DotNetCore.CAP.RabbitMQ
 {
     internal sealed class RabbitMQConsumerClientFactory : IConsumerClientFactory
     {

src/DotNetCore.CAP.SqlServer/CAP.EFOptions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 
 // ReSharper disable once CheckNamespace
 namespace DotNetCore.CAP

src/DotNetCore.CAP.SqlServer/CAP.Options.Extensions.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP;
 using Microsoft.EntityFrameworkCore;
 
@@ -14,7 +17,10 @@ namespace Microsoft.Extensions.DependencyInjection
 
         public static CapOptions UseSqlServer(this CapOptions options, Action<SqlServerOptions> configure)
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
             options.RegisterExtension(new SqlServerCapOptionsExtension(configure));
 
@@ -24,18 +30,22 @@ namespace Microsoft.Extensions.DependencyInjection
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options)
             where TContext : DbContext
         {
-            return options.UseEntityFramework<TContext>(opt => { opt.DbContextType = typeof(TContext); });
+            return options.UseEntityFramework<TContext>(opt => { });
         }
 
         public static CapOptions UseEntityFramework<TContext>(this CapOptions options, Action<EFOptions> configure)
             where TContext : DbContext
         {
-            if (configure == null) throw new ArgumentNullException(nameof(configure));
-
-            var efOptions = new EFOptions {DbContextType = typeof(TContext)};
-            configure(efOptions);
+            if (configure == null)
+            {
+                throw new ArgumentNullException(nameof(configure));
+            }
 
-            options.RegisterExtension(new SqlServerCapOptionsExtension(configure));
+            options.RegisterExtension(new SqlServerCapOptionsExtension(x =>
+            {
+                configure(x);
+                x.DbContextType = typeof(TContext);
+            }));
 
             return options;
         }

src/DotNetCore.CAP.SqlServer/CAP.SqlServerCapOptionsExtension.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using DotNetCore.CAP.Processor;
 using DotNetCore.CAP.SqlServer;
 using Microsoft.EntityFrameworkCore;
@@ -23,7 +26,8 @@ namespace DotNetCore.CAP
             services.AddSingleton<IStorageConnection, SqlServerStorageConnection>();
             services.AddScoped<ICapPublisher, CapPublisher>();
             services.AddScoped<ICallbackPublisher, CapPublisher>();
-            services.AddTransient<IAdditionalProcessor, DefaultAdditionalProcessor>();
+            services.AddTransient<ICollectProcessor, SqlServerCollectProcessor>();
+
             AddSqlServerOptions(services);
         }
 
@@ -34,18 +38,22 @@ namespace DotNetCore.CAP
             _configure(sqlServerOptions);
 
             if (sqlServerOptions.DbContextType != null)
+            {
                 services.AddSingleton(x =>
                 {
                     using (var scope = x.CreateScope())
                     {
                         var provider = scope.ServiceProvider;
-                        var dbContext = (DbContext) provider.GetService(sqlServerOptions.DbContextType);
+                        var dbContext = (DbContext)provider.GetService(sqlServerOptions.DbContextType);
                         sqlServerOptions.ConnectionString = dbContext.Database.GetDbConnection().ConnectionString;
                         return sqlServerOptions;
                     }
                 });
+            }
             else
+            {
                 services.AddSingleton(sqlServerOptions);
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.SqlServer/CAP.SqlServerOptions.cs

-// ReSharper disable once CheckNamespace
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
 
 namespace DotNetCore.CAP
 {

src/DotNetCore.CAP.SqlServer/CapPublisher.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Data.SqlClient;
 using System.Threading.Tasks;
@@ -14,28 +17,31 @@ namespace DotNetCore.CAP.SqlServer
     public class CapPublisher : CapPublisherBase, ICallbackPublisher
     {
         private readonly DbContext _dbContext;
-        private readonly ILogger _logger;
         private readonly SqlServerOptions _options;
 
-        public CapPublisher(IServiceProvider provider,
-            ILogger<CapPublisher> logger,
-            SqlServerOptions options)
+        public CapPublisher(ILogger<CapPublisher> logger, IDispatcher dispatcher,
+            IServiceProvider provider, SqlServerOptions options)
+            : base(logger, dispatcher)
         {
             ServiceProvider = provider;
-            _logger = logger;
             _options = options;
 
-            if (_options.DbContextType == null) return;
+            if (_options.DbContextType == null)
+            {
+                return;
+            }
 
             IsUsingEF = true;
-            _dbContext = (DbContext)ServiceProvider.GetService(_options.DbContextType);
+            _dbContext = (DbContext) ServiceProvider.GetService(_options.DbContextType);
         }
 
-        public async Task PublishAsync(CapPublishedMessage message)
+        public async Task PublishCallbackAsync(CapPublishedMessage message)
         {
             using (var conn = new SqlConnection(_options.ConnectionString))
             {
-               await conn.ExecuteAsync(PrepareSql(), message);
+                var id = await conn.ExecuteScalarAsync<int>(PrepareSql(), message);
+                message.Id = id;
+                Enqueue(message);
             }
         }
 
@@ -52,25 +58,20 @@ namespace DotNetCore.CAP.SqlServer
                 dbContextTransaction = _dbContext.Database.BeginTransaction(IsolationLevel.ReadCommitted);
                 dbTrans = dbContextTransaction.GetDbTransaction();
             }
+
             DbTransaction = dbTrans;
         }
 
-        protected override void Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override int Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.Execute(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("published message has been persisted to the database. name:" + message);
+            return dbConnection.ExecuteScalar<int>(PrepareSql(), message, dbTransaction);
         }
 
-        protected override Task ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected override Task<int> ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message)
         {
-            dbConnection.ExecuteAsync(PrepareSql(), message, dbTransaction);
-
-            _logger.LogInformation("published message has been persisted to the database. name:" + message);
-
-            return Task.CompletedTask;
+            return dbConnection.ExecuteScalarAsync<int>(PrepareSql(), message, dbTransaction);
         }
 
         #region private methods
@@ -78,7 +79,7 @@ namespace DotNetCore.CAP.SqlServer
         private string PrepareSql()
         {
             return
-                $"INSERT INTO {_options.Schema}.[Published] ([Name],[Content],[Retries],[Added],[ExpiresAt],[StatusName])VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName)";
+                $"INSERT INTO {_options.Schema}.[Published] ([Name],[Content],[Retries],[Added],[ExpiresAt],[StatusName])VALUES(@Name,@Content,@Retries,@Added,@ExpiresAt,@StatusName);SELECT SCOPE_IDENTITY();";
         }
 
         #endregion private methods

src/DotNetCore.CAP.SqlServer/DotNetCore.CAP.SqlServer.csproj

@@ -8,16 +8,16 @@
     <PackageTags>$(PackageTags);SQL Server</PackageTags>
   </PropertyGroup>
   
-  <PropertyGroup Condition="'$(Configuration)|$(Platform)'=='Debug|AnyCPU'">
-    <DocumentationFile>bin\Debug\netstandard2.0\DotNetCore.CAP.SqlServer.xml</DocumentationFile>
+  <PropertyGroup>
+    <DocumentationFile>bin\$(Configuration)\netstandard2.0\DotNetCore.CAP.SqlServer.xml</DocumentationFile>
     <NoWarn>1701;1702;1705;CS1591</NoWarn>
   </PropertyGroup>
   
   <ItemGroup>
     <PackageReference Include="Dapper" Version="1.50.4" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.1" />
-    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.1" />
-    <PackageReference Include="System.Data.SqlClient" Version="4.4.2" /> 
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.2" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.2" />
+    <PackageReference Include="System.Data.SqlClient" Version="4.4.3" /> 
   </ItemGroup>
 
   <ItemGroup>

src/DotNetCore.CAP.SqlServer/FetchedMessage.cs

-using DotNetCore.CAP.Models;
-
-namespace DotNetCore.CAP.SqlServer
-{
-    internal class FetchedMessage
-    {
-        public int MessageId { get; set; }
-
-        public MessageType MessageType { get; set; }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.SqlServer/IAdditionalProcessor.Default.cs → src/DotNetCore.CAP.SqlServer/ICollectProcessor.SqlServer.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data.SqlClient;
 using System.Threading.Tasks;
 using Dapper;
@@ -7,7 +10,7 @@ using Microsoft.Extensions.Logging;
 
 namespace DotNetCore.CAP.SqlServer
 {
-    public class DefaultAdditionalProcessor : IAdditionalProcessor
+    public class SqlServerCollectProcessor : ICollectProcessor
     {
         private const int MaxBatch = 1000;
 
@@ -21,7 +24,7 @@ namespace DotNetCore.CAP.SqlServer
         private readonly SqlServerOptions _options;
         private readonly TimeSpan _waitingInterval = TimeSpan.FromMinutes(5);
 
-        public DefaultAdditionalProcessor(ILogger<DefaultAdditionalProcessor> logger,
+        public SqlServerCollectProcessor(ILogger<SqlServerCollectProcessor> logger,
             SqlServerOptions sqlServerOptions)
         {
             _logger = logger;
@@ -30,10 +33,10 @@ namespace DotNetCore.CAP.SqlServer
 
         public async Task ProcessAsync(ProcessingContext context)
         {
-            _logger.LogDebug("Collecting expired entities.");
-
             foreach (var table in Tables)
             {
+                _logger.LogDebug($"Collecting expired data from table [{_options.Schema}].[{table}].");
+
                 int removedCount;
                 do
                 {

src/DotNetCore.CAP.SqlServer/SqlServerFetchedMessage.cs

-using System;
-using System.Data;
-using System.Threading;
-using Dapper;
-using DotNetCore.CAP.Models;
-
-namespace DotNetCore.CAP.SqlServer
-{
-    public class SqlServerFetchedMessage : IFetchedMessage
-    {
-        private static readonly TimeSpan KeepAliveInterval = TimeSpan.FromMinutes(1);
-        private readonly IDbConnection _connection;
-        private readonly object _lockObject = new object();
-        private readonly Timer _timer;
-        private readonly IDbTransaction _transaction;
-
-        public SqlServerFetchedMessage(int messageId,
-            MessageType type,
-            IDbConnection connection,
-            IDbTransaction transaction)
-        {
-            MessageId = messageId;
-            MessageType = type;
-            _connection = connection;
-            _transaction = transaction;
-            _timer = new Timer(ExecuteKeepAliveQuery, null, KeepAliveInterval, KeepAliveInterval);
-        }
-
-        public int MessageId { get; }
-
-        public MessageType MessageType { get; }
-
-        public void RemoveFromQueue()
-        {
-            lock (_lockObject)
-            {
-                _transaction.Commit();
-            }
-        }
-
-        public void Requeue()
-        {
-            lock (_lockObject)
-            {
-                _transaction.Rollback();
-            }
-        }
-
-        public void Dispose()
-        {
-            lock (_lockObject)
-            {
-                _timer?.Dispose();
-                _transaction.Dispose();
-                _connection.Dispose();
-            }
-        }
-
-        private void ExecuteKeepAliveQuery(object obj)
-        {
-            lock (_lockObject)
-            {
-                try
-                {
-                    _connection?.Execute("SELECT 1", _transaction);
-                }
-                catch
-                {
-                    // ignored
-                }
-            }
-        }
-    }
-}
\ No newline at end of file

src/DotNetCore.CAP.SqlServer/SqlServerMonitoringApi.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -28,9 +31,7 @@ set transaction isolation level read committed;
 select count(Id) from [{0}].Published with (nolock) where StatusName = N'Succeeded';
 select count(Id) from [{0}].Received with (nolock) where StatusName = N'Succeeded';
 select count(Id) from [{0}].Published with (nolock) where StatusName = N'Failed';
-select count(Id) from [{0}].Received with (nolock) where StatusName = N'Failed';
-select count(Id) from [{0}].Published with (nolock) where StatusName in (N'Processing',N'Scheduled',N'Enqueued');
-select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Processing',N'Scheduled',N'Enqueued');",
+select count(Id) from [{0}].Received with (nolock) where StatusName = N'Failed';",
                 _options.Schema);
 
             var statistics = UseConnection(connection =>
@@ -43,10 +44,8 @@ select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Proces
 
                     stats.PublishedFailed = multi.ReadSingle<int>();
                     stats.ReceivedFailed = multi.ReadSingle<int>();
-
-                    stats.PublishedProcessing = multi.ReadSingle<int>();
-                    stats.ReceivedProcessing = multi.ReadSingle<int>();
                 }
+
                 return stats;
             });
             return statistics;
@@ -71,17 +70,24 @@ select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Proces
             var tableName = queryDto.MessageType == MessageType.Publish ? "Published" : "Received";
             var where = string.Empty;
             if (!string.IsNullOrEmpty(queryDto.StatusName))
-                if (string.Equals(queryDto.StatusName, StatusName.Processing,
-                    StringComparison.CurrentCultureIgnoreCase))
-                    where += " and statusname in (N'Processing',N'Scheduled',N'Enqueued')";
-                else
+            {
                 where += " and statusname=@StatusName";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Name))
+            {
                 where += " and name=@Name";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Group))
+            {
                 where += " and group=@Group";
+            }
+
             if (!string.IsNullOrEmpty(queryDto.Content))
+            {
                 where += " and content like '%@Content%'";
+            }
 
             var sqlQuery =
                 $"select * from [{_options.Schema}].{tableName} where 1=1 {where} order by Added desc offset @Offset rows fetch next @Limit rows only";
@@ -102,11 +108,6 @@ select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Proces
             return UseConnection(conn => GetNumberOfMessage(conn, "Published", StatusName.Failed));
         }
 
-        public int PublishedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "Published", StatusName.Processing));
-        }
-
         public int PublishedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "Published", StatusName.Succeeded));
@@ -117,11 +118,6 @@ select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Proces
             return UseConnection(conn => GetNumberOfMessage(conn, "Received", StatusName.Failed));
         }
 
-        public int ReceivedProcessingCount()
-        {
-            return UseConnection(conn => GetNumberOfMessage(conn, "Received", StatusName.Processing));
-        }
-
         public int ReceivedSucceededCount()
         {
             return UseConnection(conn => GetNumberOfMessage(conn, "Received", StatusName.Succeeded));
@@ -129,9 +125,8 @@ select count(Id) from [{0}].Received with (nolock) where StatusName in (N'Proces
 
         private int GetNumberOfMessage(IDbConnection connection, string tableName, string statusName)
         {
-            var sqlQuery = statusName == StatusName.Processing
-                ? $"select count(Id) from [{_options.Schema}].{tableName} with (nolock) where StatusName in (N'Processing',N'Scheduled',N'Enqueued')"
-                : $"select count(Id) from [{_options.Schema}].{tableName} with (nolock) where StatusName = @state";
+            var sqlQuery =
+                $"select count(Id) from [{_options.Schema}].{tableName} with (nolock) where StatusName = @state";
 
             var count = connection.ExecuteScalar<int>(sqlQuery, new {state = statusName});
             return count;
@@ -182,7 +177,12 @@ select [Key], [Count] from aggr with (nolock) where [Key] in @keys;";
                 .ToDictionary(x => (string) x.Key, x => (int) x.Count);
 
             foreach (var key in keyMaps.Keys)
-                if (!valuesMap.ContainsKey(key)) valuesMap.Add(key, 0);
+            {
+                if (!valuesMap.ContainsKey(key))
+                {
+                    valuesMap.Add(key, 0);
+                }
+            }
 
             var result = new Dictionary<DateTime, int>();
             for (var i = 0; i < keyMaps.Count; i++)

src/DotNetCore.CAP.SqlServer/SqlServerStorage.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Data;
 using System.Data.SqlClient;
@@ -11,9 +14,9 @@ namespace DotNetCore.CAP.SqlServer
 {
     public class SqlServerStorage : IStorage
     {
+        private readonly CapOptions _capOptions;
         private readonly IDbConnection _existingConnection = null;
         private readonly ILogger _logger;
-        private readonly CapOptions _capOptions;
         private readonly SqlServerOptions _options;
 
         public SqlServerStorage(ILogger<SqlServerStorage> logger,
@@ -37,7 +40,10 @@ namespace DotNetCore.CAP.SqlServer
 
         public async Task InitializeAsync(CancellationToken cancellationToken)
         {
-            if (cancellationToken.IsCancellationRequested) return;
+            if (cancellationToken.IsCancellationRequested)
+            {
+                return;
+            }
 
             var sql = CreateDbTablesScript(_options.Schema);
 
@@ -45,6 +51,7 @@ namespace DotNetCore.CAP.SqlServer
             {
                 await connection.ExecuteAsync(sql);
             }
+
             _logger.LogDebug("Ensuring all create database tables script are applied.");
         }
 
@@ -54,15 +61,12 @@ namespace DotNetCore.CAP.SqlServer
                 $@"
 IF NOT EXISTS (SELECT * FROM sys.schemas WHERE name = '{schema}')
 BEGIN
-	EXEC('CREATE SCHEMA {schema}')
+	EXEC('CREATE SCHEMA [{schema}]')
 END;
 
-IF OBJECT_ID(N'[{schema}].[Queue]',N'U') IS NULL
+IF OBJECT_ID(N'[{schema}].[Queue]',N'U') IS NOT NULL
 BEGIN
-	CREATE TABLE [{schema}].[Queue](
-		[MessageId] [int] NOT NULL,
-		[MessageType] [tinyint] NOT NULL
-	) ON [PRIMARY]
+	DROP TABLE [{schema}].[Queue];
 END;
 
 IF OBJECT_ID(N'[{schema}].[Received]',N'U') IS NULL
@@ -122,7 +126,9 @@ END;";
             var connection = _existingConnection ?? new SqlConnection(_options.ConnectionString);
 
             if (connection.State == ConnectionState.Closed)
+            {
                 connection.Open();
+            }
 
             return connection;
         }
@@ -135,7 +141,9 @@ END;";
         internal void ReleaseConnection(IDbConnection connection)
         {
             if (connection != null && !IsExistingConnection(connection))
+            {
                 connection.Dispose();
             }
         }
+    }
 }
\ No newline at end of file

src/DotNetCore.CAP.SqlServer/SqlServerStorageConnection.cs

+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
 using System;
 using System.Collections.Generic;
-using System.Data;
 using System.Data.SqlClient;
 using System.Threading.Tasks;
 using Dapper;
@@ -36,49 +38,32 @@ namespace DotNetCore.CAP.SqlServer
             }
         }
 
-        public Task<IFetchedMessage> FetchNextMessageAsync()
-        {
-            var sql = $@"
-DELETE TOP (1)
-FROM [{Options.Schema}].[Queue] WITH (readpast, updlock, rowlock)
-OUTPUT DELETED.MessageId,DELETED.[MessageType];";
-
-            return FetchNextMessageCoreAsync(sql);
-        }
-
-        public async Task<CapPublishedMessage> GetNextPublishedMessageToBeEnqueuedAsync()
+        public async Task<IEnumerable<CapPublishedMessage>> GetPublishedMessagesOfNeedRetry()
         {
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
             var sql =
-                $"SELECT TOP (1) * FROM [{Options.Schema}].[Published] WITH (readpast) WHERE StatusName = '{StatusName.Scheduled}'";
+                $"SELECT TOP (200) * FROM [{Options.Schema}].[Published] WITH (readpast) WHERE Retries<{_capOptions.FailedRetryCount} AND Added<'{fourMinsAgo}' AND (StatusName = '{StatusName.Failed}' OR StatusName = '{StatusName.Scheduled}')";
 
             using (var connection = new SqlConnection(Options.ConnectionString))
             {
-                return await connection.QueryFirstOrDefaultAsync<CapPublishedMessage>(sql);
+                return await connection.QueryAsync<CapPublishedMessage>(sql);
             }
         }
 
-        public async Task<IEnumerable<CapPublishedMessage>> GetFailedPublishedMessages()
+        public async Task<int> StoreReceivedMessageAsync(CapReceivedMessage message)
         {
-            var sql =
-                $"SELECT TOP (200) * FROM [{Options.Schema}].[Published] WITH (readpast) WHERE Retries<{_capOptions.FailedRetryCount} AND StatusName = '{StatusName.Failed}'";
-
-            using (var connection = new SqlConnection(Options.ConnectionString))
+            if (message == null)
             {
-                return await connection.QueryAsync<CapPublishedMessage>(sql);
-            }
+                throw new ArgumentNullException(nameof(message));
             }
 
-        public async Task StoreReceivedMessageAsync(CapReceivedMessage message)
-        {
-            if (message == null) throw new ArgumentNullException(nameof(message));
-
             var sql = $@"
 INSERT INTO [{Options.Schema}].[Received]([Name],[Group],[Content],[Retries],[Added],[ExpiresAt],[StatusName])
-VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
+VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);SELECT SCOPE_IDENTITY();";
 
             using (var connection = new SqlConnection(Options.ConnectionString))
             {
-                await connection.ExecuteAsync(sql, message);
+                return await connection.ExecuteScalarAsync<int>(sql, message);
             }
         }
 
@@ -91,20 +76,11 @@ VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
             }
         }
 
-        public async Task<CapReceivedMessage> GetNextReceivedMessageToBeEnqueuedAsync()
-        {
-            var sql =
-                $"SELECT TOP (1) * FROM [{Options.Schema}].[Received] WITH (readpast) WHERE StatusName = '{StatusName.Scheduled}'";
-            using (var connection = new SqlConnection(Options.ConnectionString))
-            {
-                return await connection.QueryFirstOrDefaultAsync<CapReceivedMessage>(sql);
-            }
-        }
-
-        public async Task<IEnumerable<CapReceivedMessage>> GetFailedReceivedMessages()
+        public async Task<IEnumerable<CapReceivedMessage>> GetReceivedMessagesOfNeedRetry()
         {
+            var fourMinsAgo = DateTime.Now.AddMinutes(-4);
             var sql =
-                $"SELECT TOP (200) * FROM [{Options.Schema}].[Received] WITH (readpast) WHERE Retries<{_capOptions.FailedRetryCount} AND StatusName = '{StatusName.Failed}'";
+                $"SELECT TOP (200) * FROM [{Options.Schema}].[Received] WITH (readpast) WHERE Retries<{_capOptions.FailedRetryCount} AND Added<'{fourMinsAgo}' AND (StatusName = '{StatusName.Failed}' OR StatusName = '{StatusName.Scheduled}')";
             using (var connection = new SqlConnection(Options.ConnectionString))
             {
                 return await connection.QueryAsync<CapReceivedMessage>(sql);
@@ -136,35 +112,5 @@ VALUES(@Name,@Group,@Content,@Retries,@Added,@ExpiresAt,@StatusName);";
         public void Dispose()
         {
         }
-
-        private async Task<IFetchedMessage> FetchNextMessageCoreAsync(string sql, object args = null)
-        {
-            //here don't use `using` to dispose
-            var connection = new SqlConnection(Options.ConnectionString);
-            await connection.OpenAsync();
-            var transaction = connection.BeginTransaction(IsolationLevel.ReadCommitted);
-            FetchedMessage fetchedMessage;
-            try
-            {
-                fetchedMessage = await connection.QueryFirstOrDefaultAsync<FetchedMessage>(sql, args, transaction);
-            }
-            catch (SqlException)
-            {
-                transaction.Dispose();
-                connection.Dispose();
-                throw;
-            }
-
-            if (fetchedMessage == null)
-            {
-                transaction.Rollback();
-                transaction.Dispose();
-                connection.Dispose();
-                return null;
-            }
-
-            return new SqlServerFetchedMessage(fetchedMessage.MessageId, fetchedMessage.MessageType, connection,
-                transaction);
-        }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP.SqlServer/SqlServerStorageTransaction.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
 using System.Data.SqlClient;
 using System.Threading.Tasks;
@@ -26,7 +29,10 @@ namespace DotNetCore.CAP.SqlServer
 
         public void UpdateMessage(CapPublishedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql =
                 $"UPDATE [{_schema}].[Published] SET [Retries] = @Retries,[Content] = @Content,[ExpiresAt] = @ExpiresAt,[StatusName]=@StatusName WHERE Id=@Id;";
@@ -35,16 +41,34 @@ namespace DotNetCore.CAP.SqlServer
 
         public void UpdateMessage(CapReceivedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql =
                 $"UPDATE [{_schema}].[Received] SET [Retries] = @Retries,[Content] = @Content,[ExpiresAt] = @ExpiresAt,[StatusName]=@StatusName WHERE Id=@Id;";
             _dbConnection.Execute(sql, message, _dbTransaction);
         }
 
+        public Task CommitAsync()
+        {
+            _dbTransaction.Commit();
+            return Task.CompletedTask;
+        }
+
+        public void Dispose()
+        {
+            _dbTransaction.Dispose();
+            _dbConnection.Dispose();
+        }
+
         public void EnqueueMessage(CapPublishedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql = $"INSERT INTO [{_schema}].[Queue] values(@MessageId,@MessageType);";
             _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Publish},
@@ -53,23 +77,14 @@ namespace DotNetCore.CAP.SqlServer
 
         public void EnqueueMessage(CapReceivedMessage message)
         {
-            if (message == null) throw new ArgumentNullException(nameof(message));
+            if (message == null)
+            {
+                throw new ArgumentNullException(nameof(message));
+            }
 
             var sql = $"INSERT INTO [{_schema}].[Queue] values(@MessageId,@MessageType);";
             _dbConnection.Execute(sql, new CapQueue {MessageId = message.Id, MessageType = MessageType.Subscribe},
                 _dbTransaction);
         }
-
-        public Task CommitAsync()
-        {
-            _dbTransaction.Commit();
-            return Task.CompletedTask;
-        }
-
-        public void Dispose()
-        {
-            _dbTransaction.Dispose();
-            _dbConnection.Dispose();
-        }
     }
 }
\ No newline at end of file

src/DotNetCore.CAP/Abstractions/CapPublisherBase.cs

-using System;
+// Copyright (c) .NET Core Community. All rights reserved.
+// Licensed under the MIT License. See License.txt in the project root for license information.
+
+using System;
 using System.Data;
+using System.Diagnostics;
 using System.Threading.Tasks;
+using DotNetCore.CAP.Diagnostics;
 using DotNetCore.CAP.Infrastructure;
 using DotNetCore.CAP.Models;
-using DotNetCore.CAP.Processor;
+using Microsoft.Extensions.Logging;
 
 namespace DotNetCore.CAP.Abstractions
 {
     public abstract class CapPublisherBase : ICapPublisher, IDisposable
     {
+        private readonly IDispatcher _dispatcher;
+        private readonly ILogger _logger;
+
+        // diagnostics listener
+        // ReSharper disable once InconsistentNaming
+        private static readonly DiagnosticListener s_diagnosticListener =
+            new DiagnosticListener(CapDiagnosticListenerExtensions.DiagnosticListenerName);
+
+        protected CapPublisherBase(ILogger<CapPublisherBase> logger, IDispatcher dispatcher)
+        {
+            _logger = logger;
+            _dispatcher = dispatcher;
+        }
+
         protected IDbConnection DbConnection { get; set; }
         protected IDbTransaction DbTransaction { get; set; }
         protected bool IsCapOpenedTrans { get; set; }
@@ -21,9 +40,7 @@ namespace DotNetCore.CAP.Abstractions
             CheckIsUsingEF(name);
             PrepareConnectionForEF();
 
-            var content = Serialize(contentObj, callbackName);
-
-            PublishWithTrans(name, content);
+            PublishWithTrans(name, contentObj, callbackName);
         }
 
         public Task PublishAsync<T>(string name, T contentObj, string callbackName = null)
@@ -31,9 +48,7 @@ namespace DotNetCore.CAP.Abstractions
             CheckIsUsingEF(name);
             PrepareConnectionForEF();
 
-            var content = Serialize(contentObj, callbackName);
-
-            return PublishWithTransAsync(name, content);
+            return PublishWithTransAsync(name, contentObj, callbackName);
         }
 
         public void Publish<T>(string name, T contentObj, IDbTransaction dbTransaction, string callbackName = null)
@@ -41,9 +56,7 @@ namespace DotNetCore.CAP.Abstractions
             CheckIsAdoNet(name);
             PrepareConnectionForAdo(dbTransaction);
 
-            var content = Serialize(contentObj, callbackName);
-
-            PublishWithTrans(name, content);
+            PublishWithTrans(name, contentObj, callbackName);
         }
 
         public Task PublishAsync<T>(string name, T contentObj, IDbTransaction dbTransaction, string callbackName = null)
@@ -51,17 +64,20 @@ namespace DotNetCore.CAP.Abstractions
             CheckIsAdoNet(name);
             PrepareConnectionForAdo(dbTransaction);
 
-            var content = Serialize(contentObj, callbackName);
+            return PublishWithTransAsync(name, contentObj, callbackName);
+        }
 
-            return PublishWithTransAsync(name, content);
+        protected void Enqueue(CapPublishedMessage message)
+        {
+            _dispatcher.EnqueueToPublish(message);
         }
 
         protected abstract void PrepareConnectionForEF();
 
-        protected abstract void Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected abstract int Execute(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message);
 
-        protected abstract Task ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
+        protected abstract Task<int> ExecuteAsync(IDbConnection dbConnection, IDbTransaction dbTransaction,
             CapPublishedMessage message);
 
         protected virtual string Serialize<T>(T obj, string callbackName = null)
@@ -89,7 +105,6 @@ namespace DotNetCore.CAP.Abstractions
             {
                 CallbackName = callbackName
             };
-
             return packer.Pack(message);
         }
 
@@ -108,23 +123,38 @@ namespace DotNetCore.CAP.Abstractions
 
         private void CheckIsUsingEF(string name)
         {
-            if (name == null) throw new ArgumentNullException(nameof(name));
+            if (name == null)
+            {
+                throw new ArgumentNullException(nameof(name));
+            }
+
             if (!IsUsingEF)
+            {
                 throw new InvalidOperationException(
                     "If you are using the EntityFramework, you need to configure the DbContextType first." +
-                    " otherwise you need to use overloaded method with IDbConnection and IDbTransaction.");
+                    " otherwise you need to use overloaded method with IDbTransaction.");
+            }
         }
 
         private void CheckIsAdoNet(string name)
         {
-            if (name == null) throw new ArgumentNullException(nameof(name));
+            if (name == null)
+            {
+                throw new ArgumentNullException(nameof(name));
+            }
+
             if (IsUsingEF)
+            {
                 throw new InvalidOperationException(
                     "If you are using the EntityFramework, you do not need to use this overloaded.");
             }
+        }
 
-        private async Task PublishWithTransAsync(string name, string content)
+        private async Task PublishWithTransAsync<T>(string name, T contentObj, string callbackName = null)
         {
+            Guid operationId = default(Guid);
+            var content = Serialize(contentObj, callbackName);
+
             var message = new CapPublishedMessage
             {
                 Name = name,
@@ -132,15 +162,39 @@ namespace DotNetCore.CAP.Abstractions
                 StatusName = StatusName.Scheduled
             };
 
-            await ExecuteAsync(DbConnection, DbTransaction, message);
+            try
+            {
+                operationId = s_diagnosticListener.WritePublishMessageStoreBefore(message);
+
+                var id = await ExecuteAsync(DbConnection, DbTransaction, message);
 
                 ClosedCap();
 
-            PublishQueuer.PulseEvent.Set();
+                if (id > 0)
+                {
+                    _logger.LogInformation($"message [{message}] has been persisted in the database.");
+                    s_diagnosticListener.WritePublishMessageStoreAfter(operationId, message);
+
+                    message.Id = id;
+
+                    Enqueue(message);
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.LogError("An exception was occurred when publish message. exception message:" + e.Message, e);
+                s_diagnosticListener.WritePublishMessageStoreError(operationId, message, e);
+                Console.WriteLine(e);
+                throw;
+            }
         }
 
-        private void PublishWithTrans(string name, string content)
+        private void PublishWithTrans<T>(string name, T contentObj, string callbackName = null)
         {
+            Guid operationId = default(Guid);
+
+            var content = Serialize(contentObj, callbackName);
+
             var message = new CapPublishedMessage
             {
                 Name = name,
@@ -148,11 +202,29 @@ namespace DotNetCore.CAP.Abstractions
                 StatusName = StatusName.Scheduled
             };
 
-            Execute(DbConnection, DbTransaction, message);
+            try
+            {
+                operationId = s_diagnosticListener.WritePublishMessageStoreBefore(message);
+
+                var id = Execute(DbConnection, DbTransaction, message);
 
                 ClosedCap();
 
-            PublishQueuer.PulseEvent.Set();
+                if (id > 0)
+                {
+                    _logger.LogInformation($"message [{message}] has been persisted in the database.");
+                    s_diagnosticListener.WritePublishMessageStoreAfter(operationId, message);
+                    message.Id = id;
+                    Enqueue(message);
+                }
+            }
+            catch (Exception e)
+            {
+                _logger.LogError("An exception was occurred when publish message. exception message:" + e.Message, e);
+                s_diagnosticListener.WritePublishMessageStoreError(operationId, message, e);
+                Console.WriteLine(e);
+                throw;
+            }
         }
 
         private void ClosedCap()
@@ -162,9 +234,12 @@ namespace DotNetCore.CAP.Abstractions
                 DbTransaction.Commit();
                 DbTransaction.Dispose();
             }
+
             if (IsCapOpenedConn)
+            {
                 DbConnection.Dispose();
             }
+        }
 
         public void Dispose()
         {