Update `RabbitMQ.Client` to 7.X.

Directory.Packages.props

@@ -142,7 +142,7 @@
     <PackageVersion Include="Quartz.Extensions.DependencyInjection" Version="3.13.0" />
     <PackageVersion Include="Quartz.Plugins.TimeZoneConverter" Version="3.13.0" />
     <PackageVersion Include="Quartz.Serialization.Json" Version="3.13.0" />
-    <PackageVersion Include="RabbitMQ.Client" Version="6.8.1" />
+    <PackageVersion Include="RabbitMQ.Client" Version="7.1.2" />
     <PackageVersion Include="Rebus" Version="8.6.0" />
     <PackageVersion Include="Rebus.ServiceProvider" Version="10.2.0" />
     <PackageVersion Include="Scriban" Version="5.10.0" />

framework/src/Volo.Abp.BackgroundJobs.RabbitMQ/Volo/Abp/BackgroundJobs/RabbitMQ/JobQueue.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Globalization;
 using System.Threading;
 using System.Threading.Tasks;
 using Microsoft.Extensions.DependencyInjection;
@@ -120,46 +121,44 @@ public class JobQueue<TArgs> : IJobQueue<TArgs>
         ChannelAccessor?.Dispose();
     }
 
-    protected virtual Task EnsureInitializedAsync()
+    protected virtual async Task EnsureInitializedAsync()
     {
         if (ChannelAccessor != null && ChannelAccessor.Channel.IsOpen)
         {
-            return Task.CompletedTask;
+            return;
         }
 
-        ChannelAccessor = ChannelPool.Acquire(
+        ChannelAccessor = await ChannelPool.AcquireAsync(
             ChannelPrefix + QueueConfiguration.QueueName,
             QueueConfiguration.ConnectionName
         );
 
-        var result = QueueConfiguration.Declare(ChannelAccessor.Channel);
+        var result = await QueueConfiguration.DeclareAsync(ChannelAccessor.Channel);
         Logger.LogDebug($"RabbitMQ Queue '{QueueConfiguration.QueueName}' has {result.MessageCount} messages and {result.ConsumerCount} consumers.");
 
         // Declare delayed queue
-        QueueConfiguration.DeclareDelayed(ChannelAccessor.Channel);
+        await QueueConfiguration.DeclareDelayedAsync(ChannelAccessor.Channel);
 
         if (AbpBackgroundJobOptions.IsJobExecutionEnabled)
         {
             if (QueueConfiguration.PrefetchCount.HasValue)
             {
-                ChannelAccessor.Channel.BasicQos(0, QueueConfiguration.PrefetchCount.Value, false);
+                await ChannelAccessor.Channel.BasicQosAsync(0, QueueConfiguration.PrefetchCount.Value, false);
             }
-            
+
             Consumer = new AsyncEventingBasicConsumer(ChannelAccessor.Channel);
-            Consumer.Received += MessageReceived;
-            
+            Consumer.ReceivedAsync += MessageReceived;
+
             //TODO: What BasicConsume returns?
-            ChannelAccessor.Channel.BasicConsume(
+            await ChannelAccessor.Channel.BasicConsumeAsync(
                 queue: QueueConfiguration.QueueName,
                 autoAck: false,
                 consumer: Consumer
             );
         }
-
-        return Task.CompletedTask;
     }
 
-    protected virtual Task PublishAsync(
+    protected virtual async Task PublishAsync(
         TArgs args,
         BackgroundJobPriority priority = BackgroundJobPriority.Normal,
         TimeSpan? delay = null)
@@ -167,29 +166,27 @@ public class JobQueue<TArgs> : IJobQueue<TArgs>
         //TODO: How to handle priority
 
         var routingKey = QueueConfiguration.QueueName;
-        var basicProperties = CreateBasicPropertiesToPublish();
+        var basicProperties = new BasicProperties
+        {
+            Persistent = true
+        };
 
         if (delay.HasValue)
         {
             routingKey = QueueConfiguration.DelayedQueueName;
-            basicProperties.Expiration = delay.Value.TotalMilliseconds.ToString();
+            basicProperties.Expiration = delay.Value.TotalMilliseconds.ToString(CultureInfo.InvariantCulture);
         }
 
-        ChannelAccessor!.Channel.BasicPublish(
-            exchange: "",
-            routingKey: routingKey,
-            basicProperties: basicProperties,
-            body: Serializer.Serialize(args!)
-        );
-
-        return Task.CompletedTask;
-    }
-
-    protected virtual IBasicProperties CreateBasicPropertiesToPublish()
-    {
-        var properties = ChannelAccessor!.Channel.CreateBasicProperties();
-        properties.Persistent = true;
-        return properties;
+        if (ChannelAccessor != null)
+        {
+            await ChannelAccessor.Channel.BasicPublishAsync(
+                exchange: "",
+                routingKey: routingKey,
+                mandatory: false,
+                basicProperties: basicProperties,
+                body: Serializer.Serialize(args!)
+            );
+        }
     }
 
     protected virtual async Task MessageReceived(object sender, BasicDeliverEventArgs ea)
@@ -205,17 +202,17 @@ public class JobQueue<TArgs> : IJobQueue<TArgs>
             try
             {
                 await JobExecuter.ExecuteAsync(context);
-                ChannelAccessor!.Channel.BasicAck(deliveryTag: ea.DeliveryTag, multiple: false);
+                await ChannelAccessor!.Channel.BasicAckAsync(deliveryTag: ea.DeliveryTag, multiple: false);
             }
             catch (BackgroundJobExecutionException)
             {
                 //TODO: Reject like that?
-                ChannelAccessor!.Channel.BasicReject(deliveryTag: ea.DeliveryTag, requeue: true);
+                await ChannelAccessor!.Channel.BasicRejectAsync(deliveryTag: ea.DeliveryTag, requeue: true);
             }
             catch (Exception)
             {
                 //TODO: Reject like that?
-                ChannelAccessor!.Channel.BasicReject(deliveryTag: ea.DeliveryTag, requeue: false);
+                await ChannelAccessor!.Channel.BasicRejectAsync(deliveryTag: ea.DeliveryTag, requeue: false);
             }
         }
     }

framework/src/Volo.Abp.BackgroundJobs.RabbitMQ/Volo/Abp/BackgroundJobs/RabbitMQ/JobQueueConfiguration.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using RabbitMQ.Client;
 using Volo.Abp.RabbitMQ;
 
@@ -34,15 +35,15 @@ public class JobQueueConfiguration : QueueDeclareConfiguration
         DelayedQueueName = delayedQueueName;
     }
 
-    public virtual QueueDeclareOk DeclareDelayed(IModel channel)
+    public virtual async Task<QueueDeclareOk> DeclareDelayedAsync(IChannel channel)
     {
-        var delayedArguments = new Dictionary<string, object>(Arguments)
+        var delayedArguments = new Dictionary<string, object?>(Arguments)
         {
             ["x-dead-letter-routing-key"] = QueueName,
             ["x-dead-letter-exchange"] = string.Empty
         };
 
-        return channel.QueueDeclare(
+        return await channel.QueueDeclareAsync(
             queue: DelayedQueueName,
             durable: Durable,
             exclusive: Exclusive,

framework/src/Volo.Abp.EventBus.RabbitMQ/Volo/Abp/EventBus/RabbitMq/AbpRabbitMqEventBusOptions.cs

@@ -17,10 +17,10 @@ public class AbpRabbitMqEventBusOptions
 
     public ushort? PrefetchCount { get; set; }
 
-    public IDictionary<string, object> QueueArguments { get; set; } = new Dictionary<string, object>();
+    public IDictionary<string, object?> QueueArguments { get; set; } = new Dictionary<string, object?>();
+
+    public IDictionary<string, object?> ExchangeArguments { get; set; } = new Dictionary<string, object?>();
 
-    public IDictionary<string, object> ExchangeArguments { get; set; } = new Dictionary<string, object>();
-    
     public string GetExchangeTypeOrDefault()
     {
         return string.IsNullOrEmpty(ExchangeType)

framework/src/Volo.Abp.EventBus.RabbitMQ/Volo/Abp/EventBus/RabbitMq/RabbitMqDistributedEventBus.cs

@@ -97,7 +97,7 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
         SubscribeHandlers(AbpDistributedEventBusOptions.Handlers);
     }
 
-    private async Task ProcessEventAsync(IModel channel, BasicDeliverEventArgs ea)
+    private async Task ProcessEventAsync(IChannel channel, BasicDeliverEventArgs ea)
     {
         var eventName = ea.RoutingKey;
         var eventType = EventTypes.GetOrDefault(eventName);
@@ -224,10 +224,10 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
         IEnumerable<OutgoingEventInfo> outgoingEvents,
         OutboxConfig outboxConfig)
     {
-        using (var channel = ConnectionPool.Get(AbpRabbitMqEventBusOptions.ConnectionName).CreateModel())
+        using (var channel = await (await ConnectionPool.GetAsync(AbpRabbitMqEventBusOptions.ConnectionName))
+                   .CreateChannelAsync(new CreateChannelOptions(publisherConfirmationsEnabled: true, publisherConfirmationTrackingEnabled: true)))
         {
             var outgoingEventArray = outgoingEvents.ToArray();
-            channel.ConfirmSelect();
 
             foreach (var outgoingEvent in outgoingEventArray)
             {
@@ -248,8 +248,6 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
                     });
                 }
             }
-
-            channel.WaitForConfirmsOrDie();
         }
     }
 
@@ -293,31 +291,34 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
         return PublishAsync(eventName, body, headersArguments, eventId, correlationId);
     }
 
-    protected virtual Task PublishAsync(
+    protected virtual async Task PublishAsync(
         string eventName,
         byte[] body,
         Dictionary<string, object>? headersArguments = null,
         Guid? eventId = null,
         string? correlationId = null)
     {
-        using (var channel = ConnectionPool.Get(AbpRabbitMqEventBusOptions.ConnectionName).CreateModel())
+        using (var channel = await (await ConnectionPool.GetAsync(AbpRabbitMqEventBusOptions.ConnectionName))
+                   .CreateChannelAsync(new CreateChannelOptions(publisherConfirmationsEnabled: true, publisherConfirmationTrackingEnabled: true)))
         {
-            return PublishAsync(channel, eventName, body, headersArguments, eventId, correlationId);
+            await PublishAsync(channel, eventName, body, headersArguments, eventId, correlationId);
         }
     }
 
-    protected virtual Task PublishAsync(
-        IModel channel,
+    protected virtual async Task PublishAsync(
+        IChannel channel,
         string eventName,
         byte[] body,
         Dictionary<string, object>? headersArguments = null,
         Guid? eventId = null,
         string? correlationId = null)
     {
-        EnsureExchangeExists(channel);
+        await EnsureExchangeExistsAsync(channel);
 
-        var properties = channel.CreateBasicProperties();
-        properties.DeliveryMode = RabbitMqConsts.DeliveryModes.Persistent;
+        var properties = new BasicProperties
+        {
+            DeliveryMode = DeliveryModes.Persistent
+        };
 
         if (properties.MessageId.IsNullOrEmpty())
         {
@@ -331,18 +332,16 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
 
         SetEventMessageHeaders(properties, headersArguments);
 
-        channel.BasicPublish(
+        await channel.BasicPublishAsync(
             exchange: AbpRabbitMqEventBusOptions.ExchangeName,
             routingKey: eventName,
             mandatory: true,
             basicProperties: properties,
             body: body
         );
-
-        return Task.CompletedTask;
     }
 
-    private void EnsureExchangeExists(IModel channel)
+    protected virtual async Task EnsureExchangeExistsAsync(IChannel channel)
     {
         if (_exchangeCreated)
         {
@@ -351,14 +350,16 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
 
         try
         {
-            using (var temporaryChannel = ConnectionPool.Get(AbpRabbitMqEventBusOptions.ConnectionName).CreateModel())
+            using (var temporaryChannel = await(await ConnectionPool.GetAsync(AbpRabbitMqEventBusOptions.ConnectionName))
+                       .CreateChannelAsync(new CreateChannelOptions(publisherConfirmationsEnabled: true,
+                           publisherConfirmationTrackingEnabled: true)))
             {
-                temporaryChannel.ExchangeDeclarePassive(AbpRabbitMqEventBusOptions.ExchangeName);
+                await temporaryChannel.ExchangeDeclarePassiveAsync(AbpRabbitMqEventBusOptions.ExchangeName);
             }
         }
         catch (Exception)
         {
-            channel.ExchangeDeclare(
+            await channel.ExchangeDeclareAsync(
                 AbpRabbitMqEventBusOptions.ExchangeName,
                 AbpRabbitMqEventBusOptions.GetExchangeTypeOrDefault(),
                 durable: true
@@ -367,14 +368,14 @@ public class RabbitMqDistributedEventBus : DistributedEventBusBase, IRabbitMqDis
         _exchangeCreated = true;
     }
 
-    private void SetEventMessageHeaders(IBasicProperties properties, Dictionary<string, object>? headersArguments)
+    protected virtual void SetEventMessageHeaders(IBasicProperties properties, Dictionary<string, object>? headersArguments)
     {
         if (headersArguments == null)
         {
             return;
         }
 
-        properties.Headers ??= new Dictionary<string, object>();
+        properties.Headers ??= new Dictionary<string, object?>();
 
         foreach (var header in headersArguments)
         {

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/AbpRabbitMqModule.cs

@@ -19,7 +19,6 @@ public class AbpRabbitMqModule : AbpModule
         {
             foreach (var connectionFactory in options.Connections.Values)
             {
-                connectionFactory.DispatchConsumersAsync = true;
                 connectionFactory.AutomaticRecoveryEnabled = false;
             }
         });

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/ChannelPool.cs

@@ -3,10 +3,12 @@ using System.Collections.Concurrent;
 using System.Diagnostics;
 using System.Linq;
 using System.Threading;
+using System.Threading.Tasks;
 using Microsoft.Extensions.Logging;
 using Microsoft.Extensions.Logging.Abstractions;
 using RabbitMQ.Client;
 using Volo.Abp.DependencyInjection;
+using Volo.Abp.Threading;
 
 namespace Volo.Abp.RabbitMQ;
 
@@ -16,6 +18,8 @@ public class ChannelPool : IChannelPool, ISingletonDependency
 
     protected ConcurrentDictionary<string, ChannelPoolItem> Channels { get; }
 
+    protected SemaphoreSlim Semaphore = new SemaphoreSlim(1, 1);
+
     protected bool IsDisposed { get; private set; }
 
     protected TimeSpan TotalDisposeWaitDuration { get; set; } = TimeSpan.FromSeconds(10);
@@ -29,16 +33,33 @@ public class ChannelPool : IChannelPool, ISingletonDependency
         Logger = NullLogger<ChannelPool>.Instance;
     }
 
-    public virtual IChannelAccessor Acquire(string? channelName = null, string? connectionName = null)
+    public virtual async Task<IChannelAccessor> AcquireAsync(string? channelName = null, string? connectionName = null)
     {
         CheckDisposed();
 
         channelName = channelName ?? "";
 
-        var poolItem = Channels.GetOrAdd(
-            channelName,
-            _ => new ChannelPoolItem(CreateChannel(channelName, connectionName))
-        );
+        ChannelPoolItem poolItem;
+
+        if (Channels.TryGetValue(channelName, out var existingChannelPoolItem))
+        {
+            poolItem = existingChannelPoolItem;
+        }
+        else
+        {
+            using (await Semaphore.LockAsync())
+            {
+                if (!Channels.TryGetValue(channelName, out var channel))
+                {
+                    poolItem = new ChannelPoolItem(await CreateChannelAsync(channelName, connectionName));
+                    Channels.TryAdd(channelName, poolItem);
+                }
+                else
+                {
+                    poolItem = channel;
+                }
+            }
+        }
 
         poolItem.Acquire();
 
@@ -46,11 +67,13 @@ public class ChannelPool : IChannelPool, ISingletonDependency
         {
             poolItem.Dispose();
             Channels.TryRemove(channelName, out _);
-            poolItem = Channels.GetOrAdd(
-                channelName,
-                _ => new ChannelPoolItem(CreateChannel(channelName, connectionName))
-            );
-            
+
+            using (await Semaphore.LockAsync())
+            {
+                poolItem = new ChannelPoolItem(await CreateChannelAsync(channelName, connectionName));
+                Channels.TryAdd(channelName, poolItem);
+            }
+
             poolItem.Acquire();
         }
 
@@ -61,14 +84,14 @@ public class ChannelPool : IChannelPool, ISingletonDependency
         );
     }
 
-    protected virtual IModel CreateChannel(string channelName, string? connectionName)
+    protected virtual async Task<IChannel> CreateChannelAsync(string channelName, string? connectionName)
     {
-        return ConnectionPool
-            .Get(connectionName)
-            .CreateModel();
+        return await (await ConnectionPool
+            .GetAsync(connectionName))
+            .CreateChannelAsync();
     }
 
-    protected void CheckDisposed()
+    protected virtual void CheckDisposed()
     {
         if (IsDisposed)
         {
@@ -130,7 +153,7 @@ public class ChannelPool : IChannelPool, ISingletonDependency
 
     protected class ChannelPoolItem : IDisposable
     {
-        public IModel Channel { get; }
+        public IChannel Channel { get; }
 
         public bool IsInUse {
             get => _isInUse;
@@ -138,7 +161,7 @@ public class ChannelPool : IChannelPool, ISingletonDependency
         }
         private volatile bool _isInUse;
 
-        public ChannelPoolItem(IModel channel)
+        public ChannelPoolItem(IChannel channel)
         {
             Channel = channel;
         }
@@ -186,13 +209,13 @@ public class ChannelPool : IChannelPool, ISingletonDependency
 
     protected class ChannelAccessor : IChannelAccessor
     {
-        public IModel Channel { get; }
+        public IChannel Channel { get; }
 
         public string Name { get; }
 
         private readonly Action _disposeAction;
 
-        public ChannelAccessor(IModel channel, string name, Action disposeAction)
+        public ChannelAccessor(IChannel channel, string name, Action disposeAction)
         {
             _disposeAction = disposeAction;
             Name = name;

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/ConnectionPool.cs

@@ -1,9 +1,11 @@
 using System;
 using System.Collections.Concurrent;
-using System.Collections.Generic;
+using System.Threading;
+using System.Threading.Tasks;
 using Microsoft.Extensions.Options;
 using RabbitMQ.Client;
 using Volo.Abp.DependencyInjection;
+using Volo.Abp.Threading;
 
 namespace Volo.Abp.RabbitMQ;
 
@@ -11,52 +13,64 @@ public class ConnectionPool : IConnectionPool, ISingletonDependency
 {
     protected AbpRabbitMqOptions Options { get; }
 
-    protected ConcurrentDictionary<string, Lazy<IConnection>> Connections { get; }
+    protected ConcurrentDictionary<string, IConnection> Connections { get; }
+
+    protected SemaphoreSlim Semaphore = new SemaphoreSlim(1, 1);
 
     private bool _isDisposed;
 
     public ConnectionPool(IOptions<AbpRabbitMqOptions> options)
     {
         Options = options.Value;
-        Connections = new ConcurrentDictionary<string, Lazy<IConnection>>();
+        Connections = new ConcurrentDictionary<string, IConnection>();
     }
 
-    public virtual IConnection Get(string? connectionName = null)
+    public virtual async Task<IConnection> GetAsync(string? connectionName = null)
     {
         connectionName ??= RabbitMqConnections.DefaultConnectionName;
-        var connectionFactory = Options.Connections.GetOrDefault(connectionName);
-        try
+
+        IConnection connection;
+
+        if (Connections.TryGetValue(connectionName, out var existingConnection))
         {
-            var connection = GetConnection(connectionName, connectionFactory);
-        
-            if (connection.IsOpen)
-            {
-                return connection;
-            }
-            
-            connection.Dispose();
-            Connections.TryRemove(connectionName, out _);
-            return GetConnection(connectionName, connectionFactory);
+            connection = existingConnection;
         }
-        catch (Exception)
+        else
         {
-            Connections.TryRemove(connectionName, out _);
-            throw;
+            using (await Semaphore.LockAsync())
+            {
+                var connectionFactory = Options.Connections.GetOrDefault(connectionName);
+                try
+                {
+                    connection = await GetConnectionAsync(connectionName, connectionFactory);
+                    Connections.TryAdd(connectionName, connection);
+
+                    if (!connection.IsOpen)
+                    {
+                        connection.Dispose();
+                        Connections.TryRemove(connectionName, out _);
+                        connection = await GetConnectionAsync(connectionName, connectionFactory);
+                        Connections.TryAdd(connectionName, connection);
+                    }
+                }
+                catch (Exception)
+                {
+                    Connections.TryRemove(connectionName, out _);
+                    throw;
+                }
+            }
         }
+
+        return connection;
     }
 
-    protected virtual IConnection GetConnection(string connectionName, ConnectionFactory connectionFactory)
+    protected virtual async Task<IConnection> GetConnectionAsync(string connectionName, ConnectionFactory connectionFactory)
     {
-        return Connections.GetOrAdd(
-            connectionName, () => new Lazy<IConnection>(() =>
-            {
-                var hostnames = connectionFactory.HostName.TrimEnd(';').Split(';');
-                // Handle Rabbit MQ Cluster.
-                return hostnames.Length == 1
-                    ? connectionFactory.CreateConnection()
-                    : connectionFactory.CreateConnection(hostnames);
-            })
-        ).Value;
+        var hostnames = connectionFactory.HostName.TrimEnd(';').Split(';');
+        // Handle Rabbit MQ Cluster.
+        return hostnames.Length == 1
+            ? await connectionFactory.CreateConnectionAsync()
+            : await connectionFactory.CreateConnectionAsync(hostnames);
     }
 
     public void Dispose()
@@ -72,11 +86,11 @@ public class ConnectionPool : IConnectionPool, ISingletonDependency
         {
             try
             {
-                connection.Value.Dispose();
+                connection.Dispose();
             }
             catch
             {
-
+                // ignored
             }
         }
 

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/ExchangeDeclareConfiguration.cs

@@ -12,19 +12,19 @@ public class ExchangeDeclareConfiguration
 
     public bool AutoDelete { get; set; }
 
-    public IDictionary<string, object> Arguments { get; }
+    public IDictionary<string, object?> Arguments { get; }
 
     public ExchangeDeclareConfiguration(
         string exchangeName,
         string type,
         bool durable = false,
         bool autoDelete = false,
-        IDictionary<string, object>? arguments = null)
+        IDictionary<string, object?>? arguments = null)
     {
         ExchangeName = exchangeName;
         Type = type;
         Durable = durable;
         AutoDelete = autoDelete;
-        Arguments = arguments?? new Dictionary<string, object>();
+        Arguments = arguments?? new Dictionary<string, object?>();
     }
 }

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/IChannelAccessor.cs

@@ -10,7 +10,7 @@ public interface IChannelAccessor : IDisposable
     /// Never dispose the <see cref="Channel"/> object.
     /// Instead, dispose the <see cref="IChannelAccessor"/> after usage.
     /// </summary>
-    IModel Channel { get; }
+    IChannel Channel { get; }
 
     /// <summary>
     /// Name of the channel.

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/IChannelPool.cs

@@ -1,8 +1,9 @@
 using System;
+using System.Threading.Tasks;
 
 namespace Volo.Abp.RabbitMQ;
 
 public interface IChannelPool : IDisposable
 {
-    IChannelAccessor Acquire(string? channelName = null, string? connectionName = null);
+    Task<IChannelAccessor> AcquireAsync(string? channelName = null, string? connectionName = null);
 }

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/IConnectionPool.cs

@@ -1,9 +1,10 @@
 using System;
+using System.Threading.Tasks;
 using RabbitMQ.Client;
 
 namespace Volo.Abp.RabbitMQ;
 
 public interface IConnectionPool : IDisposable
 {
-    IConnection Get(string? connectionName = null);
+    Task<IConnection> GetAsync(string? connectionName = null);
 }

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/IRabbitMqMessageConsumer.cs

@@ -11,5 +11,5 @@ public interface IRabbitMqMessageConsumer
 
     Task UnbindAsync(string routingKey);
 
-    void OnMessageReceived(Func<IModel, BasicDeliverEventArgs, Task> callback);
+    void OnMessageReceived(Func<IChannel, BasicDeliverEventArgs, Task> callback);
 }

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/QueueDeclareConfiguration.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Threading.Tasks;
 using JetBrains.Annotations;
 using RabbitMQ.Client;
 
@@ -13,10 +14,10 @@ public class QueueDeclareConfiguration
     public bool Exclusive { get; set; }
 
     public bool AutoDelete { get; set; }
-    
-    public ushort? PrefetchCount { get; set; } 
 
-    public IDictionary<string, object> Arguments { get; }
+    public ushort? PrefetchCount { get; set; }
+
+    public IDictionary<string, object?> Arguments { get; }
 
     public QueueDeclareConfiguration(
         [NotNull] string queueName,
@@ -24,19 +25,19 @@ public class QueueDeclareConfiguration
         bool exclusive = false,
         bool autoDelete = false,
         ushort? prefetchCount = null,
-        IDictionary<string, object>? arguments = null)
+        IDictionary<string, object?>? arguments = null)
     {
         QueueName = queueName;
         Durable = durable;
         Exclusive = exclusive;
         AutoDelete = autoDelete;
-        Arguments = arguments?? new Dictionary<string, object>();
+        Arguments = arguments?? new Dictionary<string, object?>();
         PrefetchCount = prefetchCount;
     }
 
-    public virtual QueueDeclareOk Declare(IModel channel)
+    public virtual async Task<QueueDeclareOk> DeclareAsync(IChannel channel)
     {
-        return channel.QueueDeclare(
+        return await channel.QueueDeclareAsync(
             queue: QueueName,
             durable: Durable,
             exclusive: Exclusive,

framework/src/Volo.Abp.RabbitMQ/Volo/Abp/RabbitMQ/RabbitMqMessageConsumer.cs

@@ -5,6 +5,7 @@ using RabbitMQ.Client;
 using RabbitMQ.Client.Events;
 using System;
 using System.Collections.Concurrent;
+using System.Threading;
 using System.Threading.Tasks;
 using Volo.Abp.DependencyInjection;
 using Volo.Abp.ExceptionHandling;
@@ -28,13 +29,13 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
 
     protected string? ConnectionName { get; private set; }
 
-    protected ConcurrentBag<Func<IModel, BasicDeliverEventArgs, Task>> Callbacks { get; }
+    protected ConcurrentBag<Func<IChannel, BasicDeliverEventArgs, Task>> Callbacks { get; }
 
-    protected IModel? Channel { get; private set; }
+    protected IChannel? Channel { get; private set; }
 
     protected ConcurrentQueue<QueueBindCommand> QueueBindCommands { get; }
 
-    protected object ChannelSendSyncLock { get; } = new object();
+    protected SemaphoreSlim Semaphore = new SemaphoreSlim(1, 1);
 
     public RabbitMqMessageConsumer(
         IConnectionPool connectionPool,
@@ -47,7 +48,7 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
         Logger = NullLogger<RabbitMqMessageConsumer>.Instance;
 
         QueueBindCommands = new ConcurrentQueue<QueueBindCommand>();
-        Callbacks = new ConcurrentBag<Func<IModel, BasicDeliverEventArgs, Task>>();
+        Callbacks = new ConcurrentBag<Func<IChannel, BasicDeliverEventArgs, Task>>();
 
         Timer.Period = 5000; //5 sec.
         Timer.Elapsed = Timer_Elapsed;
@@ -88,21 +89,21 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
                     return;
                 }
 
-                lock (ChannelSendSyncLock)
+                using (await Semaphore.LockAsync())
                 {
                     if (QueueBindCommands.TryPeek(out var command))
                     {
                         switch (command.Type)
                         {
                             case QueueBindType.Bind:
-                                Channel.QueueBind(
+                                await Channel.QueueBindAsync(
                                     queue: Queue.QueueName,
                                     exchange: Exchange.ExchangeName,
                                     routingKey: command.RoutingKey
                                 );
                                 break;
                             case QueueBindType.Unbind:
-                                Channel.QueueUnbind(
+                                await Channel.QueueUnbindAsync(
                                     queue: Queue.QueueName,
                                     exchange: Exchange.ExchangeName,
                                     routingKey: command.RoutingKey
@@ -124,7 +125,7 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
         }
     }
 
-    public virtual void OnMessageReceived(Func<IModel, BasicDeliverEventArgs, Task> callback)
+    public virtual void OnMessageReceived(Func<IChannel, BasicDeliverEventArgs, Task> callback)
     {
         Callbacks.Add(callback);
     }
@@ -144,11 +145,11 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
 
         try
         {
-            Channel = ConnectionPool
-                .Get(ConnectionName)
-                .CreateModel();
+            Channel = await (await ConnectionPool
+                .GetAsync(ConnectionName))
+                .CreateChannelAsync();
 
-            Channel.ExchangeDeclare(
+            await Channel.ExchangeDeclareAsync(
                 exchange: Exchange.ExchangeName,
                 type: Exchange.Type,
                 durable: Exchange.Durable,
@@ -156,7 +157,7 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
                 arguments: Exchange.Arguments
             );
 
-            Channel.QueueDeclare(
+            await Channel.QueueDeclareAsync(
                 queue: Queue.QueueName,
                 durable: Queue.Durable,
                 exclusive: Queue.Exclusive,
@@ -166,13 +167,13 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
 
             if (Queue.PrefetchCount.HasValue)
             {
-                Channel.BasicQos(0, Queue.PrefetchCount.Value, false);
+                await Channel.BasicQosAsync(0, Queue.PrefetchCount.Value, false);
             }
-            
+
             var consumer = new AsyncEventingBasicConsumer(Channel);
-            consumer.Received += HandleIncomingMessageAsync;
-            
-            Channel.BasicConsume(
+            consumer.ReceivedAsync += HandleIncomingMessageAsync;
+
+            await Channel.BasicConsumeAsync(
                 queue: Queue.QueueName,
                 autoAck: false,
                 consumer: consumer
@@ -194,17 +195,23 @@ public class RabbitMqMessageConsumer : IRabbitMqMessageConsumer, ITransientDepen
                 await callback(Channel!, basicDeliverEventArgs);
             }
 
-            Channel?.BasicAck(basicDeliverEventArgs.DeliveryTag, multiple: false);
+            if (Channel != null)
+            {
+                await Channel.BasicAckAsync(basicDeliverEventArgs.DeliveryTag, multiple: false);
+            }
         }
         catch (Exception ex)
         {
             try
             {
-                Channel?.BasicNack(
-                    basicDeliverEventArgs.DeliveryTag,
-                    multiple: false,
-                    requeue: true
-                );
+                if (Channel != null)
+                {
+                    await Channel.BasicNackAsync(
+                        basicDeliverEventArgs.DeliveryTag,
+                        multiple: false,
+                        requeue: true
+                    );
+                }
             }
             // ReSharper disable once EmptyGeneralCatchClause
             catch { }