Address some more TODOs

projects/RabbitMQ.Client.OAuth2/OAuth2Client.cs

@@ -245,7 +245,6 @@ public async Task<IToken> RequestTokenAsync(CancellationToken cancellationToken
 
             if (token is null)
             {
-                // TODO specific exception?
                 throw new InvalidOperationException("token is null");
             }
 
@@ -274,7 +273,6 @@ public async Task<IToken> RefreshTokenAsync(IToken token,
 
             if (refreshedToken is null)
             {
-                // TODO specific exception?
                 throw new InvalidOperationException("refreshed token is null");
             }
 

projects/RabbitMQ.Client/Events/CallbackExceptionEventArgs.cs

@@ -78,7 +78,6 @@ public class CallbackExceptionEventArgs : BaseExceptionEventArgs
         private const string ContextString = "context";
         private const string ConsumerString = "consumer";
 
-        // TODO Why is this public when there is a build method?
         public CallbackExceptionEventArgs(IDictionary<string, object> detail, Exception exception, CancellationToken cancellationToken = default)
             : base(detail, exception, cancellationToken)
         {

projects/RabbitMQ.Client/Exceptions/UnexpectedMethodException.cs

@@ -35,7 +35,6 @@
 namespace RabbitMQ.Client.Exceptions
 {
     /// <summary>
-    /// TODO WHY IS THIS UNREFERENCED?
     /// Thrown when the channel receives an RPC reply that it wasn't expecting.
     /// </summary>
     [Serializable]

projects/RabbitMQ.Client/Impl/AutorecoveringChannel.cs

@@ -33,7 +33,6 @@
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using System.Threading;
-using System.Threading.RateLimiting;
 using System.Threading.Tasks;
 using RabbitMQ.Client.ConsumerDispatching;
 using RabbitMQ.Client.Events;
@@ -43,18 +42,17 @@ namespace RabbitMQ.Client.Impl
 {
     internal sealed class AutorecoveringChannel : IChannel, IRecoverable
     {
+        private readonly ChannelOptions _channelOptions;
+        private readonly List<string> _recordedConsumerTags = new List<string>();
+
         private AutorecoveringConnection _connection;
         private RecoveryAwareChannel _innerChannel;
         private bool _disposed;
-        private readonly List<string> _recordedConsumerTags = new List<string>();
 
         private ushort _prefetchCountConsumer;
         private ushort _prefetchCountGlobal;
-        private bool _publisherConfirmationsEnabled = false;
-        private bool _publisherConfirmationTrackingEnabled = false;
-        private RateLimiter? _outstandingPublisherConfirmationsRateLimiter = null;
+
         private bool _usesTransactions;
-        private ushort _consumerDispatchConcurrency;
 
         internal IConsumerDispatcher ConsumerDispatcher => InnerChannel.ConsumerDispatcher;
 
@@ -73,20 +71,13 @@ public TimeSpan ContinuationTimeout
             set => InnerChannel.ContinuationTimeout = value;
         }
 
-        // TODO just pass create channel options
         public AutorecoveringChannel(AutorecoveringConnection conn,
             RecoveryAwareChannel innerChannel,
-            ushort consumerDispatchConcurrency,
-            bool publisherConfirmationsEnabled,
-            bool publisherConfirmationTrackingEnabled,
-            RateLimiter? outstandingPublisherConfirmationsRateLimiter)
+            ChannelOptions channelOptions)
         {
             _connection = conn;
             _innerChannel = innerChannel;
-            _consumerDispatchConcurrency = consumerDispatchConcurrency;
-            _publisherConfirmationsEnabled = publisherConfirmationsEnabled;
-            _publisherConfirmationTrackingEnabled = publisherConfirmationTrackingEnabled;
-            _outstandingPublisherConfirmationsRateLimiter = outstandingPublisherConfirmationsRateLimiter;
+            _channelOptions = channelOptions;
         }
 
         public event AsyncEventHandler<BasicAckEventArgs> BasicAcksAsync
@@ -171,13 +162,9 @@ internal async Task<bool> AutomaticallyRecoverAsync(AutorecoveringConnection con
 
             _connection = conn;
 
-            RecoveryAwareChannel newChannel = await conn.CreateNonRecoveringChannelAsync(
-                _publisherConfirmationsEnabled,
-                _publisherConfirmationTrackingEnabled,
-                _outstandingPublisherConfirmationsRateLimiter,
-                _consumerDispatchConcurrency,
-                cancellationToken)
+            RecoveryAwareChannel newChannel = await conn.CreateNonRecoveringChannelAsync(_channelOptions, cancellationToken)
                 .ConfigureAwait(false);
+
             newChannel.TakeOver(_innerChannel);
 
             if (_prefetchCountConsumer != 0)

projects/RabbitMQ.Client/Impl/AutorecoveringConnection.cs

@@ -33,7 +33,6 @@
 using System.Collections.Generic;
 using System.Runtime.CompilerServices;
 using System.Threading;
-using System.Threading.RateLimiting;
 using System.Threading.Tasks;
 using RabbitMQ.Client.Events;
 using RabbitMQ.Client.Exceptions;
@@ -185,22 +184,12 @@ public event AsyncEventHandler<RecoveringConsumerEventArgs> RecoveringConsumerAs
 
         public IProtocol Protocol => Endpoint.Protocol;
 
-        // TODO pass channel creation options?
-        public async ValueTask<RecoveryAwareChannel> CreateNonRecoveringChannelAsync(
-            bool publisherConfirmationsEnabled = false,
-            bool publisherConfirmationTrackingEnabled = false,
-            RateLimiter? outstandingPublisherConfirmationsRateLimiter = null,
-            ushort? consumerDispatchConcurrency = null,
+        public ValueTask<RecoveryAwareChannel> CreateNonRecoveringChannelAsync(
+            ChannelOptions channelOptions,
             CancellationToken cancellationToken = default)
         {
             ISession session = InnerConnection.CreateSession();
-            var result = new RecoveryAwareChannel(_config, session, consumerDispatchConcurrency);
-            return (RecoveryAwareChannel)await result.OpenAsync(
-                publisherConfirmationsEnabled,
-                publisherConfirmationTrackingEnabled,
-                outstandingPublisherConfirmationsRateLimiter,
-                cancellationToken)
-                .ConfigureAwait(false);
+            return RecoveryAwareChannel.CreateAndOpenAsync(session, channelOptions, cancellationToken);
         }
 
         public override string ToString()
@@ -271,23 +260,16 @@ public async Task<IChannel> CreateChannelAsync(CreateChannelOptions? options = d
 
             ushort cdc = options.ConsumerDispatchConcurrency.GetValueOrDefault(_config.ConsumerDispatchConcurrency);
 
-            RecoveryAwareChannel recoveryAwareChannel = await CreateNonRecoveringChannelAsync(
-                    options.PublisherConfirmationsEnabled,
-                    options.PublisherConfirmationTrackingEnabled,
-                    options.OutstandingPublisherConfirmationsRateLimiter,
-                    cdc,
-                    cancellationToken)
+            var channelOptions = ChannelOptions.From(options, _config);
+
+            RecoveryAwareChannel recoveryAwareChannel = await CreateNonRecoveringChannelAsync(channelOptions, cancellationToken)
                 .ConfigureAwait(false);
 
-            // TODO just pass create channel options
-            var autorecoveringChannel = new AutorecoveringChannel(this,
-                recoveryAwareChannel,
-                cdc,
-                options.PublisherConfirmationsEnabled,
-                options.PublisherConfirmationTrackingEnabled,
-                options.OutstandingPublisherConfirmationsRateLimiter);
+            var autorecoveringChannel = new AutorecoveringChannel(this, recoveryAwareChannel, channelOptions);
+
             await RecordChannelAsync(autorecoveringChannel, channelsSemaphoreHeld: false, cancellationToken: cancellationToken)
                 .ConfigureAwait(false);
+
             return autorecoveringChannel;
         }
 

projects/RabbitMQ.Client/Impl/Channel.cs

@@ -37,7 +37,6 @@
 using System.Runtime.CompilerServices;
 using System.Text;
 using System.Threading;
-using System.Threading.RateLimiting;
 using System.Threading.Tasks;
 using RabbitMQ.Client.ConsumerDispatching;
 using RabbitMQ.Client.Events;
@@ -62,11 +61,10 @@ internal partial class Channel : IChannel, IRecoverable
 
         internal readonly IConsumerDispatcher ConsumerDispatcher;
 
-        public Channel(ConnectionConfig config, ISession session, ushort? perChannelConsumerDispatchConcurrency = null)
+        public Channel(ISession session, ChannelOptions channelOptions)
         {
-            ContinuationTimeout = config.ContinuationTimeout;
-            ConsumerDispatcher = new AsyncConsumerDispatcher(this,
-                perChannelConsumerDispatchConcurrency.GetValueOrDefault(config.ConsumerDispatchConcurrency));
+            ContinuationTimeout = channelOptions.ContinuationTimeout;
+            ConsumerDispatcher = new AsyncConsumerDispatcher(this, channelOptions.ConsumerDispatchConcurrency);
             Func<Exception, string, CancellationToken, Task> onExceptionAsync = (exception, context, cancellationToken) =>
                 OnCallbackExceptionAsync(CallbackExceptionEventArgs.Build(exception, context, cancellationToken));
             _basicAcksAsyncWrapper = new AsyncEventingWrapper<BasicAckEventArgs>("OnBasicAck", onExceptionAsync);
@@ -361,14 +359,12 @@ protected bool Enqueue(IRpcContinuation k)
             }
         }
 
-        internal async Task<IChannel> OpenAsync(bool publisherConfirmationsEnabled,
-            bool publisherConfirmationTrackingEnabled,
-            RateLimiter? outstandingPublisherConfirmationsRateLimiter,
+        internal async Task<IChannel> OpenAsync(ChannelOptions channelOptions,
             CancellationToken cancellationToken)
         {
-            ConfigurePublisherConfirmations(publisherConfirmationsEnabled,
-                publisherConfirmationTrackingEnabled,
-                outstandingPublisherConfirmationsRateLimiter);
+            ConfigurePublisherConfirmations(channelOptions.PublisherConfirmationsEnabled,
+                channelOptions.PublisherConfirmationTrackingEnabled,
+                channelOptions.OutstandingPublisherConfirmationsRateLimiter);
 
             bool enqueued = false;
             var k = new ChannelOpenAsyncRpcContinuation(ContinuationTimeout, cancellationToken);
@@ -1497,6 +1493,15 @@ await ModelSendAsync(in method, k.CancellationToken)
             }
         }
 
+        internal static Task<IChannel> CreateAndOpenAsync(CreateChannelOptions createChannelOptions,
+            ConnectionConfig connectionConfig, ISession session,
+            CancellationToken cancellationToken)
+        {
+            ChannelOptions channelOptions = ChannelOptions.From(createChannelOptions, connectionConfig);
+            var channel = new Channel(session, channelOptions);
+            return channel.OpenAsync(channelOptions, cancellationToken);
+        }
+
         /// <summary>
         /// Returning <c>true</c> from this method means that the command was server-originated,
         /// and handled already.

projects/RabbitMQ.Client/Impl/ChannelOptions.cs

@@ -0,0 +1,90 @@
+// This source code is dual-licensed under the Apache License, version
+// 2.0, and the Mozilla Public License, version 2.0.
+//
+// The APL v2.0:
+//
+//---------------------------------------------------------------------------
+//   Copyright (c) 2007-2024 Broadcom. All Rights Reserved.
+//
+//   Licensed 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
+//
+//       https://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.
+//---------------------------------------------------------------------------
+//
+// The MPL v2.0:
+//
+//---------------------------------------------------------------------------
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+//
+//  Copyright (c) 2007-2024 Broadcom. All Rights Reserved.
+//---------------------------------------------------------------------------
+
+using System;
+using System.Threading.RateLimiting;
+
+namespace RabbitMQ.Client.Impl
+{
+    internal sealed class ChannelOptions
+    {
+        private readonly bool _publisherConfirmationEnabled;
+        private readonly bool _publisherConfirmationTrackingEnabled;
+        private readonly ushort _consumerDispatchConcurrency;
+        private readonly RateLimiter? _outstandingPublisherConfirmationsRateLimiter;
+        private readonly TimeSpan _continuationTimeout;
+
+        public ChannelOptions(bool publisherConfirmationEnabled,
+            bool publisherConfirmationTrackingEnabled,
+            ushort consumerDispatchConcurrency,
+            RateLimiter? outstandingPublisherConfirmationsRateLimiter,
+            TimeSpan continuationTimeout)
+        {
+            _publisherConfirmationEnabled = publisherConfirmationEnabled;
+            _publisherConfirmationTrackingEnabled = publisherConfirmationTrackingEnabled;
+            _consumerDispatchConcurrency = consumerDispatchConcurrency;
+            _outstandingPublisherConfirmationsRateLimiter = outstandingPublisherConfirmationsRateLimiter;
+            _continuationTimeout = continuationTimeout;
+        }
+
+        public bool PublisherConfirmationsEnabled => _publisherConfirmationEnabled;
+
+        public bool PublisherConfirmationTrackingEnabled => _publisherConfirmationTrackingEnabled;
+
+        public ushort ConsumerDispatchConcurrency => _consumerDispatchConcurrency;
+
+        public RateLimiter? OutstandingPublisherConfirmationsRateLimiter => _outstandingPublisherConfirmationsRateLimiter;
+
+        public TimeSpan ContinuationTimeout => _continuationTimeout;
+
+        public static ChannelOptions From(CreateChannelOptions createChannelOptions,
+            ConnectionConfig connectionConfig)
+        {
+            ushort cdc = createChannelOptions.ConsumerDispatchConcurrency.GetValueOrDefault(
+                connectionConfig.ConsumerDispatchConcurrency);
+
+            return new ChannelOptions(createChannelOptions.PublisherConfirmationsEnabled,
+                createChannelOptions.PublisherConfirmationTrackingEnabled,
+                cdc,
+                createChannelOptions.OutstandingPublisherConfirmationsRateLimiter,
+                connectionConfig.ContinuationTimeout);
+        }
+
+        public static ChannelOptions From(ConnectionConfig connectionConfig)
+        {
+            return new ChannelOptions(publisherConfirmationEnabled: false,
+                publisherConfirmationTrackingEnabled: false,
+                consumerDispatchConcurrency: Constants.DefaultConsumerDispatchConcurrency,
+                outstandingPublisherConfirmationsRateLimiter: null,
+                continuationTimeout: connectionConfig.ContinuationTimeout);
+        }
+    }
+}

projects/RabbitMQ.Client/Impl/Connection.cs

@@ -78,7 +78,7 @@ internal Connection(ConnectionConfig config, IFrameHandler frameHandler)
 
             _sessionManager = new SessionManager(this, 0, config.MaxInboundMessageBodySize);
             _session0 = new MainSession(this, config.MaxInboundMessageBodySize);
-            _channel0 = new Channel(_config, _session0);
+            _channel0 = new Channel(_session0, ChannelOptions.From(config));
 
             ClientProperties = new Dictionary<string, object?>(_config.ClientProperties)
             {
@@ -263,23 +263,15 @@ await CloseAsync(ea, true,
             }
         }
 
-        public async Task<IChannel> CreateChannelAsync(CreateChannelOptions? options = default,
+        public Task<IChannel> CreateChannelAsync(CreateChannelOptions? createChannelOptions = default,
             CancellationToken cancellationToken = default)
         {
             EnsureIsOpen();
 
-            options ??= CreateChannelOptions.Default;
+            createChannelOptions ??= CreateChannelOptions.Default;
             ISession session = CreateSession();
 
-            // TODO channel CreateChannelAsync() to combine ctor and OpenAsync
-            var channel = new Channel(_config, session, options.ConsumerDispatchConcurrency);
-            IChannel ch = await channel.OpenAsync(
-                options.PublisherConfirmationsEnabled,
-                options.PublisherConfirmationTrackingEnabled,
-                options.OutstandingPublisherConfirmationsRateLimiter,
-                cancellationToken)
-                .ConfigureAwait(false);
-            return ch;
+            return Channel.CreateAndOpenAsync(createChannelOptions, _config, session, cancellationToken);
         }
 
         internal ISession CreateSession()

projects/RabbitMQ.Client/Impl/RecoveryAwareChannel.cs

@@ -31,14 +31,13 @@
 
 using System.Threading;
 using System.Threading.Tasks;
-using RabbitMQ.Client.Framing;
 
 namespace RabbitMQ.Client.Impl
 {
     internal sealed class RecoveryAwareChannel : Channel
     {
-        public RecoveryAwareChannel(ConnectionConfig config, ISession session, ushort? consumerDispatchConcurrency = null)
-            : base(config, session, consumerDispatchConcurrency)
+        public RecoveryAwareChannel(ISession session, ChannelOptions channelOptions)
+            : base(session, channelOptions)
         {
             ActiveDeliveryTagOffset = 0;
             MaxSeenDeliveryTag = 0;
@@ -104,5 +103,13 @@ public override ValueTask BasicRejectAsync(ulong deliveryTag, bool requeue,
                 return default;
             }
         }
+
+        internal static async ValueTask<RecoveryAwareChannel> CreateAndOpenAsync(ISession session, ChannelOptions channelOptions,
+            CancellationToken cancellationToken)
+        {
+            var result = new RecoveryAwareChannel(session, channelOptions);
+            return (RecoveryAwareChannel)await result.OpenAsync(channelOptions, cancellationToken)
+                .ConfigureAwait(false);
+        }
     }
 }