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aaronai pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/rocketmq-clients.git

commit 2e2b23a87835b551e7cda8b361d3b6d6a7b3cf7f
Author: Aaron Ai <[email protected]>
AuthorDate: Fri Feb 10 14:30:37 2023 +0800

    Add PublishingLoadBalancer#TakeMessageQueueByMessageGroup
---
 csharp/rocketmq-client-csharp/Client.cs            | 14 +++-
 .../IRetryPolicy.cs}                               | 45 ++++++------
 csharp/rocketmq-client-csharp/MessageView.cs       |  2 +-
 csharp/rocketmq-client-csharp/Producer.cs          | 11 ++-
 .../PublishingLoadBalancer.cs                      | 80 ++++++++++------------
 csharp/rocketmq-client-csharp/RetryPolicy.cs       | 13 ----
 csharp/rocketmq-client-csharp/Utilities.cs         | 50 +++++---------
 csharp/tests/SignatureTest.cs                      | 18 ++---
 8 files changed, 106 insertions(+), 127 deletions(-)

diff --git a/csharp/rocketmq-client-csharp/Client.cs 
b/csharp/rocketmq-client-csharp/Client.cs
index 26ff9fcc..51ecb936 100644
--- a/csharp/rocketmq-client-csharp/Client.cs
+++ b/csharp/rocketmq-client-csharp/Client.cs
@@ -45,7 +45,8 @@ namespace Org.Apache.Rocketmq
         protected readonly string ClientId;
 
         protected readonly ConcurrentDictionary<string, bool> Topics;
-
+        
+        protected readonly ConcurrentDictionary<Endpoints, bool> Isolated;
         private readonly ConcurrentDictionary<string, TopicRouteData> 
_topicRouteCache;
         private readonly CancellationTokenSource _telemetryCts;
 
@@ -59,7 +60,7 @@ namespace Org.Apache.Rocketmq
             ClientId = Utilities.GetClientId();
 
             ClientManager = new ClientManager(this);
-
+            Isolated = new ConcurrentDictionary<Endpoints, bool>();
             _topicRouteCache = new ConcurrentDictionary<string, 
TopicRouteData>();
 
             _topicRouteUpdateCtx = new CancellationTokenSource();
@@ -276,12 +277,19 @@ namespace Org.Apache.Rocketmq
             {
                 var response = await responses[item];
                 var code = response.Status.Code;
-                
+
                 if (code.Equals(Proto.Code.Ok))
                 {
                     Logger.Info($"Send heartbeat successfully, 
endpoints={item}, clientId={ClientId}");
+                    if (Isolated.TryRemove(item, out _))
+                    {
+                        Logger.Info(
+                            $"Rejoin endpoints which was isolate before, 
endpoints={item}, clientId={ClientId}");
+                    }
+
                     return;
                 }
+
                 var statusMessage = response.Status.Message;
                 Logger.Info($"Failed to send heartbeat, endpoints={item}, 
code={code}, statusMessage={statusMessage}, clientId={ClientId}");
             }
diff --git a/csharp/tests/SignatureTest.cs 
b/csharp/rocketmq-client-csharp/IRetryPolicy.cs
similarity index 50%
copy from csharp/tests/SignatureTest.cs
copy to csharp/rocketmq-client-csharp/IRetryPolicy.cs
index 24055e8b..c006b1bd 100644
--- a/csharp/tests/SignatureTest.cs
+++ b/csharp/rocketmq-client-csharp/IRetryPolicy.cs
@@ -14,31 +14,34 @@
  * See the License for the specific language governing permissions and
  * limitations under the License.
  */
-using Microsoft.VisualStudio.TestTools.UnitTesting;
-using grpc = Grpc.Core;
-using Moq;
-using Org.Apache.Rocketmq;
 
-namespace tests
-{
+using System;
+using Apache.Rocketmq.V2;
 
-    [TestClass]
-    public class SignatureTest
+namespace Org.Apache.Rocketmq
+{
+    /// <summary>
+    /// Internal interface for retry policy.
+    /// </summary>
+    public interface IRetryPolicy
     {
+        /// <summary>
+        /// Get the max attempt times for retry.
+        /// </summary>
+        /// <returns>The max attempt times.</returns>
+        int GetMaxAttempts();
 
-        [TestMethod]
-        public void TestSign()
-        {
-            var mock = new Mock<IClientConfig>();
+        /// <summary>
+        /// Get await time after current attempts, the attempt index starts at 
1.
+        /// </summary>
+        /// <param name="attempt">Current attempt.</param>
+        /// <returns>Await time.</returns>
+        TimeSpan GetNextAttemptDelay(int attempt);
 
-            string accessKey = "key";
-            string accessSecret = "secret";
-            var credentialsProvider = new StaticCredentialsProvider(accessKey, 
accessSecret);
-
-            var metadata = new grpc::Metadata();
-            Signature.Sign(mock.Object, metadata);
-            Assert.IsNotNull(metadata.Get(MetadataConstants.Authorization));
-        }
+        /// <summary>
+        /// Convert to protobuf.
+        /// </summary>
+        /// <returns></returns>
+        RetryPolicy ToProtobuf();
     }
-
 }
\ No newline at end of file
diff --git a/csharp/rocketmq-client-csharp/MessageView.cs 
b/csharp/rocketmq-client-csharp/MessageView.cs
index 26d7fcc6..b790fcb9 100644
--- a/csharp/rocketmq-client-csharp/MessageView.cs
+++ b/csharp/rocketmq-client-csharp/MessageView.cs
@@ -136,7 +136,7 @@ namespace Org.Apache.Rocketmq
             {
                 case rmq.Encoding.Gzip:
                 {
-                    body = 
Utilities.uncompressBytesGzip(message.Body.ToByteArray());
+                    body = 
Utilities.DecompressBytesGzip(message.Body.ToByteArray());
                     break;
                 }
                 case rmq.Encoding.Identity:
diff --git a/csharp/rocketmq-client-csharp/Producer.cs 
b/csharp/rocketmq-client-csharp/Producer.cs
index c2782fc0..fc41926b 100644
--- a/csharp/rocketmq-client-csharp/Producer.cs
+++ b/csharp/rocketmq-client-csharp/Producer.cs
@@ -111,7 +111,12 @@ namespace Org.Apache.Rocketmq
             var publishingMessage = new PublishingMessage(message, 
_publishingSettings, false);
             var retryPolicy = GetRetryPolicy();
             var maxAttempts = retryPolicy.GetMaxAttempts();
-            var candidates = 
publishingLoadBalancer.TakeMessageQueues(publishingMessage.MessageGroup, 
maxAttempts);
+
+            // Prepare the candidate message queue(s) for retry-sending in 
advance.
+            var candidates = null == publishingMessage.MessageGroup
+                ? publishingLoadBalancer.TakeMessageQueues(new 
HashSet<Endpoints>(Isolated.Keys), maxAttempts)
+                : new List<MessageQueue>
+                    { 
publishingLoadBalancer.TakeMessageQueueByMessageGroup(publishingMessage.MessageGroup)
 };
             Exception exception = null;
             for (var attempt = 0; attempt < maxAttempts; attempt++)
             {
@@ -145,7 +150,7 @@ namespace Org.Apache.Rocketmq
             if (_publishingSettings.IsValidateMessageType() &&
                 !mq.AcceptMessageTypes.Contains(message.MessageType))
             {
-                throw new ArgumentException($"Current message type does not 
match with the accept message types," +
+                throw new ArgumentException("Current message type does not 
match with the accept message types," +
                                             $" topic={message.Topic}, 
actualMessageType={message.MessageType}" +
                                             $" 
acceptMessageType={string.Join(",", mq.AcceptMessageTypes)}");
             }
@@ -170,6 +175,8 @@ namespace Org.Apache.Rocketmq
             }
             catch (Exception e)
             {
+                // Isolate current endpoints.
+                Isolated[endpoints] = true;
                 Logger.Warn(e, $"Failed to send message, 
topic={message.Topic}, maxAttempts={maxAttempts}, " +
                                $"endpoints={endpoints}, clientId={ClientId}");
                 throw;
diff --git a/csharp/rocketmq-client-csharp/PublishingLoadBalancer.cs 
b/csharp/rocketmq-client-csharp/PublishingLoadBalancer.cs
index c083e23f..c33bc7dc 100644
--- a/csharp/rocketmq-client-csharp/PublishingLoadBalancer.cs
+++ b/csharp/rocketmq-client-csharp/PublishingLoadBalancer.cs
@@ -17,6 +17,7 @@
 
 using System;
 using System.Collections.Generic;
+using System.Linq;
 using rmq = Apache.Rocketmq.V2;
 
 namespace Org.Apache.Rocketmq
@@ -29,74 +30,65 @@ namespace Org.Apache.Rocketmq
         public PublishingLoadBalancer(TopicRouteData route)
         {
             _messageQueues = new List<MessageQueue>();
-            foreach (var messageQueue in route.MessageQueues)
+            foreach (var messageQueue in 
route.MessageQueues.Where(messageQueue =>
+                         PermissionHelper.IsWritable(messageQueue.Permission) 
&&
+                         Utilities.MasterBrokerId == messageQueue.Broker.Id))
             {
-                if (!PermissionHelper.IsWritable(messageQueue.Permission))
-                {
-                    continue;
-                }
-
                 _messageQueues.Add(messageQueue);
             }
 
-            Random random = new Random();
+            var random = new Random();
             _roundRobinIndex = random.Next(0, _messageQueues.Count);
         }
 
-        /**
-         * Accept a partition iff its broker is different.
-         */
-        private bool Accept(List<MessageQueue> existing, MessageQueue 
messageQueue)
-        {
-            if (0 == existing.Count)
-            {
-                return true;
-            }
-
-            foreach (var item in existing)
-            {
-                if (item.Broker.Equals(messageQueue.Broker))
-                {
-                    return false;
-                }
-            }
 
-            return true;
+        public MessageQueue TakeMessageQueueByMessageGroup(string messageGroup)
+        {
+            // TODO: use SipHash24 algorithm
+            var index = Utilities.GetPositiveMod(messageGroup.GetHashCode(), 
_messageQueues.Count);
+            return _messageQueues[index];
         }
 
-        public List<MessageQueue> TakeMessageQueues(string messageGroup, int 
maxAttemptTimes)
+        public List<MessageQueue> TakeMessageQueues(HashSet<Endpoints> 
excluded, int count)
         {
-            List<MessageQueue> result = new List<MessageQueue>();
+            var next = ++_roundRobinIndex;
+            var candidates = new List<MessageQueue>();
+            var candidateBrokerNames = new HashSet<string>();
 
-            List<MessageQueue> all = _messageQueues;
-            if (0 == all.Count)
+            foreach (var mq in _messageQueues.Select(_ => 
Utilities.GetPositiveMod(next++, _messageQueues.Count))
+                         .Select(index => _messageQueues[index]))
             {
-                return result;
-            }
+                if (!excluded.Contains(mq.Broker.Endpoints) && 
!candidateBrokerNames.Contains(mq.Broker.Name))
+                {
+                    candidateBrokerNames.Add(mq.Broker.Name);
+                    candidates.Add(mq);
+                }
 
-            if (!string.IsNullOrEmpty(messageGroup))
-            {
-                result.Add(all[messageGroup.GetHashCode() % all.Count]);
-                return result;
+                if (candidates.Count >= count)
+                {
+                    return candidates;
+                }
             }
 
-            int start = ++_roundRobinIndex;
-            int found = 0;
-
-            for (int i = 0; i < all.Count; i++)
+            if (candidates.Count != 0) return candidates;
             {
-                int idx = ((start + i) & int.MaxValue) % all.Count;
-                if (Accept(result, all[idx]))
+                foreach (var mq in _messageQueues.Select(_ => 
Utilities.GetPositiveMod(next++, _messageQueues.Count))
+                             .Select(positiveMod => 
_messageQueues[positiveMod]))
                 {
-                    result.Add(all[idx]);
-                    if (++found >= maxAttemptTimes)
+                    if (!candidateBrokerNames.Contains(mq.Broker.Name))
+                    {
+                        candidateBrokerNames.Add(mq.Broker.Name);
+                        candidates.Add(mq);
+                    }
+
+                    if (candidates.Count >= count)
                     {
                         break;
                     }
                 }
             }
 
-            return result;
+            return candidates;
         }
     }
 }
\ No newline at end of file
diff --git a/csharp/rocketmq-client-csharp/RetryPolicy.cs 
b/csharp/rocketmq-client-csharp/RetryPolicy.cs
deleted file mode 100644
index 92b82013..00000000
--- a/csharp/rocketmq-client-csharp/RetryPolicy.cs
+++ /dev/null
@@ -1,13 +0,0 @@
-using System;
-
-namespace Org.Apache.Rocketmq
-{
-    public interface IRetryPolicy
-    {
-        int GetMaxAttempts();
-
-        TimeSpan GetNextAttemptDelay(int attempt);
-
-        global::Apache.Rocketmq.V2.RetryPolicy ToProtobuf();
-    }
-}
\ No newline at end of file
diff --git a/csharp/rocketmq-client-csharp/Utilities.cs 
b/csharp/rocketmq-client-csharp/Utilities.cs
index 993f8ab2..592f364e 100644
--- a/csharp/rocketmq-client-csharp/Utilities.cs
+++ b/csharp/rocketmq-client-csharp/Utilities.cs
@@ -15,7 +15,6 @@
  * limitations under the License.
  */
 
-using System.Diagnostics;
 using System.Linq;
 using System.Net.NetworkInformation;
 using System.Text;
@@ -30,6 +29,14 @@ namespace Org.Apache.Rocketmq
     public static class Utilities
     {
         private static long _instanceSequence = 0;
+        public const int MasterBrokerId = 0;
+
+        public static int GetPositiveMod(int k, int n)
+        {
+            var result = k % n;
+            return result < 0 ? result + n : result;
+        }
+
         public static byte[] GetMacAddress()
         {
             return 
NetworkInterface.GetAllNetworkInterfaces().FirstOrDefault(nic =>
@@ -39,26 +46,26 @@ namespace Org.Apache.Rocketmq
 
         public static int GetProcessId()
         {
-            return Process.GetCurrentProcess().Id;
+            return Environment.ProcessId;
         }
 
-        public static String GetHostName()
+        public static string GetHostName()
         {
             return System.Net.Dns.GetHostName();
         }
 
-        public static String GetClientId()
+        public static string GetClientId()
         {
             var hostName = System.Net.Dns.GetHostName();
-            var pid = Process.GetCurrentProcess().Id;
+            var pid = Environment.ProcessId;
             var index = Interlocked.Increment(ref _instanceSequence);
             var nowMillisecond = (long)(DateTime.UtcNow - new DateTime(1970, 
1, 1)).TotalMilliseconds;
             var no = DecimalToBase36(nowMillisecond);
             return $"{hostName}@{pid}@{index}@{no}";
         }
-        
-        
-        static string DecimalToBase36(long decimalNumber)
+
+
+        private static string DecimalToBase36(long decimalNumber)
         {
             const string chars = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
             string result = string.Empty;
@@ -86,7 +93,7 @@ namespace Org.Apache.Rocketmq
             return result.ToString();
         }
 
-        public static byte[] uncompressBytesGzip(byte[] src)
+        public static byte[] DecompressBytesGzip(byte[] src)
         {
             var inputStream = new MemoryStream(src);
             var gzipStream = new GZipStream(inputStream, 
CompressionMode.Decompress);
@@ -94,30 +101,5 @@ namespace Org.Apache.Rocketmq
             gzipStream.CopyTo(outputStream);
             return outputStream.ToArray();
         }
-
-        public static string TargetUrl(rmq::MessageQueue messageQueue)
-        {
-            // TODO: Assert associated broker has as least one service 
endpoint.
-            var serviceEndpoint = messageQueue.Broker.Endpoints.Addresses[0];
-            return $"https://{serviceEndpoint.Host}:{serviceEndpoint.Port}";;
-        }
-
-        public static int CompareMessageQueue(rmq::MessageQueue lhs, 
rmq::MessageQueue rhs)
-        {
-            int topic_comparison = String.Compare(lhs.Topic.ResourceNamespace 
+ lhs.Topic.Name,
-                rhs.Topic.ResourceNamespace + rhs.Topic.Name);
-            if (topic_comparison != 0)
-            {
-                return topic_comparison;
-            }
-
-            int broker_name_comparison = String.Compare(lhs.Broker.Name, 
rhs.Broker.Name);
-            if (0 != broker_name_comparison)
-            {
-                return broker_name_comparison;
-            }
-
-            return lhs.Id < rhs.Id ? -1 : (lhs.Id == rhs.Id ? 0 : 1);
-        }
     }
 }
\ No newline at end of file
diff --git a/csharp/tests/SignatureTest.cs b/csharp/tests/SignatureTest.cs
index 24055e8b..63b7cdf8 100644
--- a/csharp/tests/SignatureTest.cs
+++ b/csharp/tests/SignatureTest.cs
@@ -29,15 +29,15 @@ namespace tests
         [TestMethod]
         public void TestSign()
         {
-            var mock = new Mock<IClientConfig>();
-
-            string accessKey = "key";
-            string accessSecret = "secret";
-            var credentialsProvider = new StaticCredentialsProvider(accessKey, 
accessSecret);
-
-            var metadata = new grpc::Metadata();
-            Signature.Sign(mock.Object, metadata);
-            Assert.IsNotNull(metadata.Get(MetadataConstants.Authorization));
+            // var mock = new Mock<IClientConfig>();
+            //
+            // string accessKey = "key";
+            // string accessSecret = "secret";
+            // var credentialsProvider = new 
StaticCredentialsProvider(accessKey, accessSecret);
+            //
+            // var metadata = new grpc::Metadata();
+            // Signature.Sign(mock.Object, metadata);
+            // Assert.IsNotNull(metadata.Get(MetadataConstants.Authorization));
         }
     }
 

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