Add supports for some EntityFrameworkCore Providers (#41)

* Add EntityFrameworkCore component define

* Add EntityFrameworkCore component define

* Refactor Diagnostics.EntityFrameworkCore

* Remove DefaultEFCoreComponentProvider

* Support EntityFrameworkCore.Sqlite

* Update Sample.Backend

* Support Pomelo_EntityFrameworkCore_MySql provider for EntityFrameworkCore

*  Fix Parent Application Instance Id is 0

* Support Npgsql.EntityFramework

sample/SkyWalking.Sample.Backend/Controllers/AppsController.cs

+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.AspNetCore.Mvc;
+using SkyWalking.Sample.Backend.Models;
+
+namespace SkyWalking.Sample.Backend.Controllers
+{
+    [Route("api/[controller]")]
+    public class AppsController: Controller
+    {
+        private readonly SampleDbContext _dbContext;
+
+        public AppsController(SampleDbContext sampleDbContext)
+        {
+            _dbContext = sampleDbContext;
+        }
+
+        [HttpGet]
+        public IEnumerable<Application> Get()
+        {
+            return _dbContext.Applications.ToList();
+        }
+
+        [HttpGet("{id}")]
+        public Application Get(int id)
+        {
+            return _dbContext.Applications.Find(id);
+        }
+
+        [HttpPut]
+        public void Put([FromBody]Application application)
+        {
+            _dbContext.Applications.Add(application);
+            _dbContext.SaveChanges();
+        }
+    }
+}
\ No newline at end of file

sample/SkyWalking.Sample.Backend/Controllers/ValuesController.cs

 using System.Collections.Generic;
+using System.Linq;
 using System.Net.Http;
 using System.Threading.Tasks;
 using Microsoft.AspNetCore.Mvc;
+using SkyWalking.Sample.Backend.Models;
 
 namespace SkyWalking.Sample.Backend.Controllers
 {
@@ -12,15 +14,14 @@ namespace SkyWalking.Sample.Backend.Controllers
         [HttpGet]
         public IEnumerable<string> Get()
         {
-            return new string[] { "value1", "value2" };
+            return new List<string> {"value1", "value2"};
         }
 
         // GET api/values/5
         [HttpGet("{id}")]
-        public async Task<string> Get(int id)
+        public string Get(int id)
         {
-            var httpClient = new HttpClient();
-            return await httpClient.GetStringAsync("http://www.baidu.com");
+            return "value";
         }
     } 
 }
\ No newline at end of file

sample/SkyWalking.Sample.Backend/Models/Application.cs

+namespace SkyWalking.Sample.Backend.Models
+{
+    public class Application
+    {
+        public int Id { get; set; }
+        
+        public string Name { get; set; }
+    }
+}
\ No newline at end of file

sample/SkyWalking.Sample.Backend/Models/SampleDbContext.cs

+using Microsoft.EntityFrameworkCore;
+
+namespace SkyWalking.Sample.Backend.Models
+{
+    public class SampleDbContext :DbContext
+    {
+        public  DbSet<Application> Applications { get; set; }
+
+        public SampleDbContext(DbContextOptions options):base(options)
+        {
+        }
+
+        protected override void OnModelCreating(ModelBuilder modelBuilder)
+        {
+            modelBuilder.Entity<Application>().HasKey(x => x.Id);
+            modelBuilder.Entity<Application>().Property(x => x.Name);
+            base.OnModelCreating(modelBuilder);
+        }
+    }
+}
\ No newline at end of file

sample/SkyWalking.Sample.Backend/SkyWalking.Sample.Backend.csproj

@@ -7,6 +7,7 @@
   </ItemGroup>
   <ItemGroup>
     <ProjectReference Include="..\..\src\SkyWalking.AspNetCore\SkyWalking.AspNetCore.csproj" />
+    <ProjectReference Include="..\..\src\SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite\SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite.csproj" />
   </ItemGroup>
   <ItemGroup>
     <PackageReference Include="Microsoft.AspNetCore.All" Version="2.0.0" />

sample/SkyWalking.Sample.Backend/Startup.cs

-using Microsoft.AspNetCore.Builder;
+using System.Data.SqlClient;
+using Microsoft.AspNetCore.Builder;
 using Microsoft.AspNetCore.Hosting;
+using Microsoft.Data.Sqlite;
+using Microsoft.EntityFrameworkCore;
 using Microsoft.Extensions.Configuration;
 using Microsoft.Extensions.DependencyInjection;
 using SkyWalking.AspNetCore;
+using SkyWalking.Diagnostics.EntityFrameworkCore;
+using SkyWalking.Sample.Backend.Models;
 
 namespace SkyWalking.Sample.Backend
 {
@@ -24,7 +29,13 @@ namespace SkyWalking.Sample.Backend
             {
                 option.DirectServers = "localhost:11800";
                 option.ApplicationCode = "asp-net-core-backend";
-            });
+            }).
+            AddEntityFrameworkCore(c => { c.AddSqlite(); });
+
+            var sqliteConnection = new SqliteConnection("DataSource=:memory:");
+            sqliteConnection.Open();
+            
+            services.AddEntityFrameworkSqlite().AddDbContext<SampleDbContext>(c => c.UseSqlite(sqliteConnection));
         }
 
         // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
@@ -35,6 +46,14 @@ namespace SkyWalking.Sample.Backend
                 app.UseDeveloperExceptionPage();
             }
 
+            using (var scope = app.ApplicationServices.CreateScope())
+            {
+                using (var sampleDbContext = scope.ServiceProvider.GetService<SampleDbContext>())
+                {
+                    sampleDbContext.Database.EnsureCreated();
+                } 
+            }
+
             app.UseMvc();
         }
     }

skywalking-csharp.sln

@@ -50,6 +50,14 @@ Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SkyWalking.Diagnostics.Enti
 EndProject
 Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SkyWalking.Diagnostics.SqlClient", "src\SkyWalking.Diagnostics.SqlClient\SkyWalking.Diagnostics.SqlClient.csproj", "{44DFFDF7-5935-475A-825F-2C0298464117}"
 EndProject
+Project("{2150E333-8FDC-42A3-9474-1A3956D46DE8}") = "EntityFrameworkCore", "EntityFrameworkCore", "{A4E67E09-3156-4D30-B451-F24F706E96C4}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite", "src\SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite\SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite.csproj", "{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql", "src\SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql\SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql.csproj", "{7BD880F3-2886-4EE6-9569-114613AFFCBC}"
+EndProject
+Project("{FAE04EC0-301F-11D3-BF4B-00C04F79EFBC}") = "SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql", "src\SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql\SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql.csproj", "{F8D96C30-369C-4FCB-B5B2-02EAA74199C9}"
+EndProject
 Global
 	GlobalSection(SolutionConfigurationPlatforms) = preSolution
 		Debug|Any CPU = Debug|Any CPU
@@ -116,6 +124,18 @@ Global
 		{44DFFDF7-5935-475A-825F-2C0298464117}.Debug|Any CPU.Build.0 = Debug|Any CPU
 		{44DFFDF7-5935-475A-825F-2C0298464117}.Release|Any CPU.ActiveCfg = Release|Any CPU
 		{44DFFDF7-5935-475A-825F-2C0298464117}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E}.Release|Any CPU.Build.0 = Release|Any CPU
+		{7BD880F3-2886-4EE6-9569-114613AFFCBC}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{7BD880F3-2886-4EE6-9569-114613AFFCBC}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{7BD880F3-2886-4EE6-9569-114613AFFCBC}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{7BD880F3-2886-4EE6-9569-114613AFFCBC}.Release|Any CPU.Build.0 = Release|Any CPU
+		{F8D96C30-369C-4FCB-B5B2-02EAA74199C9}.Debug|Any CPU.ActiveCfg = Debug|Any CPU
+		{F8D96C30-369C-4FCB-B5B2-02EAA74199C9}.Debug|Any CPU.Build.0 = Debug|Any CPU
+		{F8D96C30-369C-4FCB-B5B2-02EAA74199C9}.Release|Any CPU.ActiveCfg = Release|Any CPU
+		{F8D96C30-369C-4FCB-B5B2-02EAA74199C9}.Release|Any CPU.Build.0 = Release|Any CPU
 	EndGlobalSection
 	GlobalSection(SolutionProperties) = preSolution
 		HideSolutionNode = FALSE
@@ -135,9 +155,13 @@ Global
 		{BF5579ED-113C-4EE6-AE03-9A9CA590C924} = {79ED86A5-E9B9-49B2-9354-C911C079D03E}
 		{55621423-19C3-4928-8B45-666FA87BF6A2} = {79ED86A5-E9B9-49B2-9354-C911C079D03E}
 		{05E533B1-473F-48C0-95F7-B87061BE9834} = {613F0980-91ED-4064-8E8C-168582EF4AD7}
-		{CD334460-8E61-41EB-9762-62C6A342CACB} = {79ED86A5-E9B9-49B2-9354-C911C079D03E}
 		{4CF91A8C-25C8-4BD8-A93D-3183AF0FE2E2} = {613F0980-91ED-4064-8E8C-168582EF4AD7}
 		{44DFFDF7-5935-475A-825F-2C0298464117} = {79ED86A5-E9B9-49B2-9354-C911C079D03E}
+		{A4E67E09-3156-4D30-B451-F24F706E96C4} = {79ED86A5-E9B9-49B2-9354-C911C079D03E}
+		{CD334460-8E61-41EB-9762-62C6A342CACB} = {A4E67E09-3156-4D30-B451-F24F706E96C4}
+		{F5C529C9-23C4-46B7-84FF-E86C6D17EB3E} = {A4E67E09-3156-4D30-B451-F24F706E96C4}
+		{7BD880F3-2886-4EE6-9569-114613AFFCBC} = {A4E67E09-3156-4D30-B451-F24F706E96C4}
+		{F8D96C30-369C-4FCB-B5B2-02EAA74199C9} = {A4E67E09-3156-4D30-B451-F24F706E96C4}
 	EndGlobalSection
 	GlobalSection(ExtensibilityGlobals) = postSolution
 		SolutionGuid = {94C0DA2C-CCCB-4314-93A2-9809B5DD0583}

src/SkyWalking.Core/Context/Trace/TraceSegmentRef.cs

@@ -154,7 +154,6 @@ namespace SkyWalking.Context.Trace
             if (_type == SegmentRefType.CrossProcess)
             {
                 traceSegmentReference.RefType = RefType.CrossProcess;
-                traceSegmentReference.ParentApplicationInstanceId = _parentApplicationInstanceId;
                 if (_peerId == DictionaryUtil.NullValue)
                 {
                     traceSegmentReference.NetworkAddress = _peerHost;
@@ -168,7 +167,7 @@ namespace SkyWalking.Context.Trace
             {
                 traceSegmentReference.RefType = RefType.CrossThread;
             }
-
+            traceSegmentReference.ParentApplicationInstanceId = _parentApplicationInstanceId;
             traceSegmentReference.EntryApplicationInstanceId = _entryApplicationInstanceId;
             traceSegmentReference.ParentTraceSegmentId = _traceSegmentId.Transform();
             traceSegmentReference.ParentSpanId = _spanId;

src/SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql/DatabaseProviderBuilderExtensions.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using Microsoft.Extensions.DependencyInjection;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public static class DatabaseProviderBuilderExtensions
+    {
+        public static DatabaseProviderBuilder AddNpgsql(this DatabaseProviderBuilder builder)
+        {
+            builder.Services.AddSingleton<IEfCoreSpanMetadataProvider, NpgsqlEFCoreSpanMetadataProvider>();
+            return builder;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql/NpgsqlEFCoreSpanMetadataProvider.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using System.Data.Common;
+using Npgsql;
+using SkyWalking.NetworkProtocol.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public class NpgsqlEFCoreSpanMetadataProvider : IEfCoreSpanMetadataProvider
+    {
+        public IComponent Component { get; } = ComponentsDefine.Npgsql_EntityFrameworkCore_PostgreSQL;
+        
+        public bool Match(DbConnection connection)
+        {
+           return connection is NpgsqlConnection;
+        }
+
+        public string GetPeer(DbConnection connection)
+        {
+            return connection.DataSource;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql/SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\..\build\common.props" />
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyName>SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql</AssemblyName>
+    <AssemblyTitle>SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql</AssemblyTitle>
+    <PackageId>SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql</PackageId>
+    <PackageTags>SkyWalking;APM;EntityFrameworkCore;EF</PackageTags>
+    <Description>SkyWalking.Diagnostics.EntityFrameworkCore.Npgsql notifies of EF requests.</Description>
+    <RootNamespace>SkyWalking.Diagnostics.EntityFrameworkCore</RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SkyWalking.Abstractions\SkyWalking.Abstractions.csproj" />
+    <ProjectReference Include="..\SkyWalking.Core\SkyWalking.Core.csproj" />
+    <ProjectReference Include="..\SkyWalking.Diagnostics.EntityFrameworkCore\SkyWalking.Diagnostics.EntityFrameworkCore.csproj" />
+    <ProjectReference Include="..\SkyWalking.Extensions.DependencyInjection\SkyWalking.Extensions.DependencyInjection.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Npgsql.EntityFrameworkCore.PostgreSQL" Version="2.0.0" />
+  </ItemGroup>
+</Project>
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql/DatabaseProviderBuilderExtensions.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using Microsoft.Extensions.DependencyInjection;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public static class DatabaseProviderBuilderExtensions
+    {
+        public static DatabaseProviderBuilder AddPomeloMysql(this DatabaseProviderBuilder builder)
+        {
+            builder.Services.AddSingleton<IEfCoreSpanMetadataProvider, MySqlEFCoreSpanMetadataProvider>();
+            return builder;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql/MySqlEFCoreSpanMetadataProvider.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using System.Data.Common;
+using MySql.Data.MySqlClient;
+using SkyWalking.NetworkProtocol.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public class MySqlEFCoreSpanMetadataProvider : IEfCoreSpanMetadataProvider
+    {
+        public IComponent Component { get; } = ComponentsDefine.Pomelo_EntityFrameworkCore_MySql;
+        
+        public bool Match(DbConnection connection)
+        {
+            return connection is MySqlConnection;
+        }
+
+        public string GetPeer(DbConnection connection)
+        {
+            return connection.DataSource;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql/SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\..\build\common.props" />
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyName>SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql</AssemblyName>
+    <AssemblyTitle>SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql</AssemblyTitle>
+    <PackageId>SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql</PackageId>
+    <PackageTags>SkyWalking;APM;EntityFrameworkCore;EF</PackageTags>
+    <Description>SkyWalking.Diagnostics.EntityFrameworkCore.Pomelo.MySql notifies of EF requests.</Description>
+    <RootNamespace>SkyWalking.Diagnostics.EntityFrameworkCore</RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SkyWalking.Abstractions\SkyWalking.Abstractions.csproj" />
+    <ProjectReference Include="..\SkyWalking.Core\SkyWalking.Core.csproj" />
+    <ProjectReference Include="..\SkyWalking.Diagnostics.EntityFrameworkCore\SkyWalking.Diagnostics.EntityFrameworkCore.csproj" />
+    <ProjectReference Include="..\SkyWalking.Extensions.DependencyInjection\SkyWalking.Extensions.DependencyInjection.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Pomelo.EntityFrameworkCore.MySql" Version="2.0.1" />
+  </ItemGroup>
+</Project>
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite/DatabaseProviderBuilderExtensions.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using Microsoft.Extensions.DependencyInjection;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public static class DatabaseProviderBuilderExtensions
+    {
+        public static DatabaseProviderBuilder AddSqlite(this DatabaseProviderBuilder builder)
+        {
+            builder.Services.AddSingleton<IEfCoreSpanMetadataProvider, SqliteEFCoreSpanMetadataProvider>();
+            return builder;
+        }
+    }
+}

src/SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite/SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite.csproj

+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\..\build\common.props" />
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyName>SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite</AssemblyName>
+    <AssemblyTitle>SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite</AssemblyTitle>
+    <PackageId>SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite</PackageId>
+    <PackageTags>SkyWalking;APM;EntityFrameworkCore;EF</PackageTags>
+    <Description>SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite notifies of EF requests.</Description>
+    <RootNamespace>SkyWalking.Diagnostics.EntityFrameworkCore</RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SkyWalking.Abstractions\SkyWalking.Abstractions.csproj" />
+    <ProjectReference Include="..\SkyWalking.Core\SkyWalking.Core.csproj" />
+    <ProjectReference Include="..\SkyWalking.Diagnostics.EntityFrameworkCore\SkyWalking.Diagnostics.EntityFrameworkCore.csproj" />
+    <ProjectReference Include="..\SkyWalking.Extensions.DependencyInjection\SkyWalking.Extensions.DependencyInjection.csproj" />
+  </ItemGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Sqlite" Version="2.0.0" />
+  </ItemGroup>
+</Project>
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore.Sqlite/SqliteEFCoreSpanMetadataProvider.cs

+/*
+ * Licensed to the OpenSkywalking under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ *
+ */
+
+using System.Data.Common;
+using Microsoft.Data.Sqlite;
+using SkyWalking.NetworkProtocol.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public class SqliteEFCoreSpanMetadataProvider : IEfCoreSpanMetadataProvider
+    {
+        public IComponent Component { get; } = ComponentsDefine.EntityFrameworkCore_Sqlite;
+        
+        public bool Match(DbConnection connection)
+        {
+            return connection is SqliteConnection;
+        }
+
+        public string GetPeer(DbConnection connection)
+        {
+            string dataSource;
+            switch (connection.DataSource)
+            {
+                    case "":
+                        dataSource = "localhost";
+                        break;
+                    default:
+                        dataSource = connection.DataSource;
+                        break;
+            }
+
+            return $"{dataSource}";
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore/DatabaseProviderBuilder.cs

+using Microsoft.Extensions.DependencyInjection;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public class DatabaseProviderBuilder
+    {
+        public IServiceCollection Services { get; }
+
+        public DatabaseProviderBuilder(IServiceCollection services)
+        {
+            Services = services;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore/EfCoreSpanFactory.cs

+using System.Collections.Generic;
+using System.Linq;
+using Microsoft.EntityFrameworkCore.Diagnostics;
+using SkyWalking.Context;
+using SkyWalking.Context.Trace;
+using SkyWalking.NetworkProtocol.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public class EfCoreSpanFactory : IEfCoreSpanFactory
+    {
+        private readonly IEnumerable<IEfCoreSpanMetadataProvider> _spanMetadataProviders;
+
+        public EfCoreSpanFactory(IEnumerable<IEfCoreSpanMetadataProvider> spanMetadataProviders)
+        {
+            _spanMetadataProviders = spanMetadataProviders;
+        }
+
+        public ISpan Create(string operationName, CommandEventData eventData)
+        {
+            foreach (var provider in _spanMetadataProviders)
+                if (provider.Match(eventData.Command.Connection)) return CreateSpan(operationName, eventData, provider);
+
+            return CreateDefaultSpan(operationName, eventData);
+        }
+
+        protected virtual ISpan CreateSpan(string operationName, CommandEventData eventData, IEfCoreSpanMetadataProvider metadataProvider)
+        {
+            var span = ContextManager.CreateExitSpan(operationName, metadataProvider.GetPeer(eventData.Command.Connection));
+            span.SetComponent(metadataProvider.Component);
+            return span;
+        }
+
+        private ISpan CreateDefaultSpan(string operationName, CommandEventData eventData)
+        {
+            var span = ContextManager.CreateLocalSpan(operationName);
+            span.SetComponent(ComponentsDefine.EntityFrameworkCore);
+            return span;
+        }
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore/EntityFrameworkCoreDiagnosticProcessor.cs

@@ -18,19 +18,22 @@
 
 using System;
 using System.Data.Common;
+using System.Linq;
+using System.Runtime.InteropServices.ComTypes;
 using Microsoft.EntityFrameworkCore;
 using Microsoft.EntityFrameworkCore.Diagnostics;
 using Microsoft.EntityFrameworkCore.Storage.Internal;
+using SkyWalking.Config;
 using SkyWalking.Context;
 using SkyWalking.Context.Tag;
 using SkyWalking.Context.Trace;
-using SkyWalking.NetworkProtocol.Trace;
 
 namespace SkyWalking.Diagnostics.EntityFrameworkCore
 {
     public class EntityFrameworkCoreDiagnosticProcessor : ITracingDiagnosticProcessor
     {
         private Func<CommandEventData, string> _operationNameResolver;
+        private readonly IEfCoreSpanFactory _efCoreSpanFactory;
 
         public string ListenerName => DbLoggerCategory.Name;
 
@@ -42,17 +45,25 @@ namespace SkyWalking.Diagnostics.EntityFrameworkCore
             get
             {
                 return _operationNameResolver ??
-                       (_operationNameResolver = (data) => "DB " + data.ExecuteMethod.ToString());
+                       (_operationNameResolver = (data) =>
+                       {
+                           var commandType = data.Command.CommandText?.Split(' ');
+                           return "DB " + (commandType.FirstOrDefault() ?? data.ExecuteMethod.ToString());
+                       });
             }
             set => _operationNameResolver = value ?? throw new ArgumentNullException(nameof(OperationNameResolver));
         }
 
+        public EntityFrameworkCoreDiagnosticProcessor(IEfCoreSpanFactory spanFactory)
+        {
+            _efCoreSpanFactory = spanFactory;
+        }
+
         [DiagnosticName("Microsoft.EntityFrameworkCore.Database.Command.CommandExecuting")]
-        public void CommandExecuting([Object]CommandEventData eventData)
+        public void CommandExecuting([Object] CommandEventData eventData)
         {
             var operationName = OperationNameResolver(eventData);
-            var span = ContextManager.CreateLocalSpan(operationName);
-            span.SetComponent(ComponentsDefine.EntityFrameworkCore);
+            var span = _efCoreSpanFactory.Create(operationName, eventData);
             span.SetLayer(SpanLayer.DB);
             Tags.DbType.Set(span, "Sql");
             Tags.DbInstance.Set(span, eventData.Command.Connection.Database);

src/SkyWalking.Diagnostics.EntityFrameworkCore/IEfCoreSpanFactory.cs

+using Microsoft.EntityFrameworkCore.Diagnostics;
+using SkyWalking.Context.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public interface IEfCoreSpanFactory
+    {
+        ISpan Create(string operationName, CommandEventData eventData);
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore/IEfCoreSpanMetadataProvider.cs

+using System;
+using System.Data.Common;
+using  SkyWalking.NetworkProtocol.Trace;
+
+namespace SkyWalking.Diagnostics.EntityFrameworkCore
+{
+    public interface IEfCoreSpanMetadataProvider
+    {
+        IComponent Component { get; }
+
+        bool Match(DbConnection connection);
+
+        string GetPeer(DbConnection connection);
+    }
+}
\ No newline at end of file

src/SkyWalking.Diagnostics.EntityFrameworkCore/SkyWalking.Diagnostics.EntityFrameworkCore.csproj

-<Project Sdk="Microsoft.NET.Sdk">
-
-    <Import Project="..\..\build\common.props" />
-
-    <PropertyGroup>
-        <TargetFramework>netstandard2.0</TargetFramework>
-    </PropertyGroup>
-
-    <PropertyGroup>
-        <AssemblyName>SkyWalking.Diagnostics.EntityFrameworkCore</AssemblyName>
-        <AssemblyTitle>SkyWalking.Diagnostics.EntityFrameworkCore</AssemblyTitle>
-        <PackageId>SkyWalking.Diagnostics.EntityFrameworkCore</PackageId>
-        <PackageTags>SkyWalking;APM;EntityFrameworkCore;EF</PackageTags>
-        <Description>SkyWalking.Diagnostics.EntityFrameworkCore notifies of EF requests.</Description>
-        <RootNamespace>SkyWalking.Diagnostics.HttpClient</RootNamespace>
-    </PropertyGroup>
-
-    <ItemGroup>
-      <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.0" />
-      <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.0" />
-    </ItemGroup>
-
-    <ItemGroup>
-        <ProjectReference Include="..\SkyWalking.Abstractions\SkyWalking.Abstractions.csproj" />
+<Project Sdk="Microsoft.NET.Sdk">
+  <Import Project="..\..\build\common.props" />
+  <PropertyGroup>
+    <TargetFramework>netstandard2.0</TargetFramework>
+  </PropertyGroup>
+  <PropertyGroup>
+    <AssemblyName>SkyWalking.Diagnostics.EntityFrameworkCore</AssemblyName>
+    <AssemblyTitle>SkyWalking.Diagnostics.EntityFrameworkCore</AssemblyTitle>
+    <PackageId>SkyWalking.Diagnostics.EntityFrameworkCore</PackageId>
+    <PackageTags>SkyWalking;APM;EntityFrameworkCore;EF</PackageTags>
+    <Description>SkyWalking.Diagnostics.EntityFrameworkCore notifies of EF requests.</Description>
+    <RootNamespace>SkyWalking.Diagnostics.EntityFrameworkCore</RootNamespace>
+  </PropertyGroup>
+  <ItemGroup>
+    <PackageReference Include="Microsoft.EntityFrameworkCore" Version="2.0.0" />
+    <PackageReference Include="Microsoft.EntityFrameworkCore.Relational" Version="2.0.0" />
+  </ItemGroup>
+  <ItemGroup>
+    <ProjectReference Include="..\SkyWalking.Abstractions\SkyWalking.Abstractions.csproj" />
+    <ProjectReference Include="..\SkyWalking.Core\SkyWalking.Core.csproj" />
+    <ProjectReference Include="..\SkyWalking.Extensions.DependencyInjection\SkyWalking.Extensions.DependencyInjection.csproj" />
+  </ItemGroup>
+</Project>
\ No newline at end of file
-        <ProjectReference Include="..\SkyWalking.Core\SkyWalking.Core.csproj" />
-        <ProjectReference Include="..\SkyWalking.Extensions.DependencyInjection\SkyWalking.Extensions.DependencyInjection.csproj" />
-    </ItemGroup>
-
-</Project>

src/SkyWalking.Diagnostics.EntityFrameworkCore/SkyWalkingBuilderExtensions.cs

@@ -24,7 +24,7 @@ namespace SkyWalking.Diagnostics.EntityFrameworkCore
 {
     public static class SkyWalkingBuilderExtensions
     {
-        public static SkyWalkingBuilder AddEntityFrameworkCore(this SkyWalkingBuilder builder)
+        public static SkyWalkingBuilder AddEntityFrameworkCore(this SkyWalkingBuilder builder, Action<DatabaseProviderBuilder> optionAction)
         {
             if (builder == null)
             {
@@ -32,7 +32,14 @@ namespace SkyWalking.Diagnostics.EntityFrameworkCore
             }
 
             builder.Services.AddSingleton<ITracingDiagnosticProcessor, EntityFrameworkCoreDiagnosticProcessor>();
-            
+            builder.Services.AddSingleton<IEfCoreSpanFactory, EfCoreSpanFactory>();
+
+            if (optionAction != null)
+            {
+                var databaseProviderBuilder = new DatabaseProviderBuilder(builder.Services);
+                optionAction(databaseProviderBuilder);
+            }
+
             return builder;
         }
     }

src/SkyWalking.NetworkProtocol.Trace/ComponentsDefine.cs

@@ -37,17 +37,27 @@ namespace SkyWalking.NetworkProtocol.Trace
         
         public static readonly OfficialComponent SqlServer = new OfficialComponent(3006, "SqlServer");
         
+        public static readonly OfficialComponent Npgsql = new OfficialComponent(3007, "Npgsql");
+        
+        public static readonly OfficialComponent MySqlConnector = new OfficialComponent(3008, "MySqlConnector");
+        
+        public static readonly OfficialComponent EntityFrameworkCore_InMemory = new OfficialComponent(3009, "EntityFrameworkCore.InMemory");
+        
+        public static readonly OfficialComponent EntityFrameworkCore_SqlServer = new OfficialComponent(3010, "EntityFrameworkCore.SqlServer");
+        
+        public static readonly OfficialComponent EntityFrameworkCore_Sqlite = new OfficialComponent(3011, "EntityFrameworkCore.Sqlite");
+        
+        public static readonly OfficialComponent Pomelo_EntityFrameworkCore_MySql = new OfficialComponent(3012, "Pomelo.EntityFrameworkCore.MySql");
+        
+        public static readonly OfficialComponent Npgsql_EntityFrameworkCore_PostgreSQL = new OfficialComponent(3013, "Npgsql.EntityFrameworkCore.PostgreSQL");
+        
+        public static readonly OfficialComponent InMemoryDatabase = new OfficialComponent(3014, "InMemoryDatabase");
+        
         private static readonly ComponentsDefine _instance = new ComponentsDefine();
 
-        public ComponentsDefine Instance
-        {
-            get
-            {
-                return _instance;
-            }
-        }
+        public ComponentsDefine Instance => _instance;
 
-        private Dictionary<int, string> _components;
+        private readonly Dictionary<int, string> _components;
 
         private ComponentsDefine()
         {
@@ -58,6 +68,14 @@ namespace SkyWalking.NetworkProtocol.Trace
             AddComponent(CAP);
             AddComponent(StackExchange_Redis);
             AddComponent(SqlServer);
+            AddComponent(Npgsql);
+            AddComponent(MySqlConnector);
+            AddComponent(EntityFrameworkCore_InMemory);
+            AddComponent(EntityFrameworkCore_SqlServer);
+            AddComponent(EntityFrameworkCore_Sqlite);
+            AddComponent(Pomelo_EntityFrameworkCore_MySql);
+            AddComponent(Npgsql_EntityFrameworkCore_PostgreSQL);
+            AddComponent(InMemoryDatabase);
         }
 
         private void AddComponent(OfficialComponent component)

test/SkyWalking.Diagnostics.EntityFrameworkCore.Tests/EFCoreDiagnosticProcessorTests.cs

 using System;
+using System.Collections.Generic;
 using System.Diagnostics;
 using Microsoft.Data.Sqlite;
 using Microsoft.EntityFrameworkCore;
@@ -57,7 +58,7 @@ namespace SkyWalking.Diagnostics.EntityFrameworkCore.Tests
         {
             var processorObserver = new TracingDiagnosticProcessorObserver(new[]
             {
-                new EntityFrameworkCoreDiagnosticProcessor()
+                new EntityFrameworkCoreDiagnosticProcessor(new EfCoreSpanFactory(new List<IEfCoreSpanMetadataProvider>()))
             });
 
             DiagnosticListener.AllListeners.Subscribe(processorObserver);