Code refactoring

src/DotNetCore.CAP/Internal/IMessageSender.Default.cs

@@ -95,10 +95,8 @@ namespace DotNetCore.CAP.Internal
         {
             var needRetry = UpdateMessageForRetry(message);
 
-            if (message.ExpiresAt != null)
-            {
-                message.ExpiresAt = DateTime.Now.AddDays(15);
-            }
+            message.ExpiresAt = message.Added.AddDays(15);
+
             await _dataStorage.ChangePublishStateAsync(message, StatusName.Failed);
 
             return needRetry;
@@ -106,12 +104,8 @@ namespace DotNetCore.CAP.Internal
 
         private bool UpdateMessageForRetry(MediumMessage message)
         {
-            var retryBehavior = RetryBehavior.DefaultRetry;
-
             var retries = ++message.Retries;
-            message.ExpiresAt = message.Added.AddSeconds(retryBehavior.RetryIn(retries));
-
-            var retryCount = Math.Min(_options.Value.FailedRetryCount, retryBehavior.RetryCount);
+            var retryCount = Math.Min(_options.Value.FailedRetryCount, 3);
             if (retries >= retryCount)
             {
                 if (retries == _options.Value.FailedRetryCount)
@@ -194,7 +188,7 @@ namespace DotNetCore.CAP.Internal
 
                 s_diagnosticListener.Write(CapDiagnosticListenerNames.ErrorPublish, eventData);
             }
-        } 
+        }
 
         #endregion
     }

src/DotNetCore.CAP/Internal/ISubscribeDispatcher.Default.cs

@@ -128,6 +128,8 @@ namespace DotNetCore.CAP.Internal
 
             var needRetry = UpdateMessageForRetry(message);
 
+            message.ExpiresAt = message.Added.AddDays(15);
+
             await _dataStorage.ChangeReceiveStateAsync(message, StatusName.Failed);
 
             return needRetry;
@@ -135,12 +137,9 @@ namespace DotNetCore.CAP.Internal
 
         private bool UpdateMessageForRetry(MediumMessage message)
         {
-            var retryBehavior = RetryBehavior.DefaultRetry;
-
             var retries = ++message.Retries;
-            message.ExpiresAt = message.Added.AddSeconds(retryBehavior.RetryIn(retries));
 
-            var retryCount = Math.Min(_options.FailedRetryCount, retryBehavior.RetryCount);
+            var retryCount = Math.Min(_options.FailedRetryCount, 3);
             if (retries >= retryCount)
             {
                 if (retries == _options.FailedRetryCount)
@@ -197,7 +196,7 @@ namespace DotNetCore.CAP.Internal
             catch (Exception ex)
             {
                 var e = new SubscriberExecutionFailedException(ex.Message, ex);
-                
+
                 TracingError(tracingTimestamp, message.Origin, descriptor.MethodInfo, e);
 
                 throw e;

src/DotNetCore.CAP/Processor/RetryBehavior.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;
-
-namespace DotNetCore.CAP.Processor
-{
-    public class RetryBehavior
-    {
-        public static readonly int DefaultRetryCount;
-        public static readonly Func<int, int> DefaultRetryInThunk;
-
-        public static readonly RetryBehavior DefaultRetry;
-        public static readonly RetryBehavior NoRetry;
-
-        // ReSharper disable once InconsistentNaming
-        private static readonly Random _random = new Random();
-
-        private readonly Func<int, int> _retryInThunk;
-
-        static RetryBehavior()
-        {
-            DefaultRetryCount = 3;
-            DefaultRetryInThunk = retries =>
-                (int) Math.Round(Math.Pow(retries - 1, 4) + 3 + _random.Next(30) * retries);
-
-            DefaultRetry = new RetryBehavior(true);
-            NoRetry = new RetryBehavior(false);
-        }
-
-        public RetryBehavior(bool retry)
-            : this(retry, DefaultRetryCount, DefaultRetryInThunk)
-        {
-        }
-
-        /// <summary>
-        /// Initializes a new instance of the <see cref="RetryBehavior" /> class.
-        /// </summary>
-        /// <param name="retry">Whether to retry.</param>
-        /// <param name="retryCount">The maximum retry count.</param>
-        /// <param name="retryInThunk">The retry in function to use.</param>
-        public RetryBehavior(bool retry, int retryCount, Func<int, int> retryInThunk)
-        {
-            if (retry)
-            {
-                if (retryCount < 0)
-                {
-                    throw new ArgumentOutOfRangeException(nameof(retryCount), "Can't be negative.");
-                }
-            }
-
-            Retry = retry;
-            RetryCount = retryCount;
-            _retryInThunk = retryInThunk ?? DefaultRetryInThunk;
-        }
-
-        public Random Random => _random;
-
-        /// <summary>
-        /// Gets whether to retry or disable retrying.
-        /// </summary>
-        public bool Retry { get; }
-
-        /// <summary>
-        /// Gets the maximum retry count.
-        /// </summary>
-        public int RetryCount { get; }
-
-        /// <summary>
-        /// Returns the seconds to delay before retrying again.
-        /// </summary>
-        /// <param name="retries">The current retry count.</param>
-        /// <returns>The seconds to delay.</returns>
-        public int RetryIn(int retries)
-        {
-            return _retryInThunk(retries);
-        }
-    }
-}
\ No newline at end of file