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Ensure
DisposeAsync and Dispose are idempotent
Fixes #1749 * Add test project * Add `FirstChanceException` logging. * Add code to repeatedly close connection. * Allow passing hostname to GH-1749 program as the first arg. * Toxiproxy tests fixup. * Standardize on `_disposedValue` name. * Ensure `_disposedValue` is set in `finally` block. * Add lock object for disposal of Channels and Connections. Note: a `SemaphoreSlim` can't be used because it must be disposed as well, and that can't happen cleanly in a `Dispose` method.
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <RootNamespace>GH_1749</RootNamespace> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <PackageReference Include="EasyNetQ.Management.Client" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="../../RabbitMQ.Client/RabbitMQ.Client.csproj" /> | ||
| </ItemGroup> | ||
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| </Project> |
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| // 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. | ||
| //--------------------------------------------------------------------------- | ||
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| #pragma warning disable CA2007 // Consider calling ConfigureAwait on the awaited task | ||
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| using System.Runtime.ExceptionServices; | ||
| using RabbitMQ.Client; | ||
| using RabbitMQ.Client.Events; | ||
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| namespace GH_1749 | ||
| { | ||
| class GH1749Consumer : AsyncDefaultBasicConsumer | ||
| { | ||
| public GH1749Consumer(IChannel channel) : base(channel) | ||
| { | ||
| } | ||
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| protected override Task OnCancelAsync(string[] consumerTags, CancellationToken cancellationToken = default) | ||
| { | ||
| Console.WriteLine("{0} [INFO] OnCancelAsync, tags[0]: {1}", Util.Now, consumerTags[0]); | ||
| return base.OnCancelAsync(consumerTags, cancellationToken); | ||
| } | ||
| } | ||
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| static class Program | ||
| { | ||
| const string DefaultHostName = "localhost"; | ||
| const string ConnectionClientProvidedName = "GH_1749"; | ||
| static readonly CancellationTokenSource s_cancellationTokenSource = new(); | ||
| static readonly CancellationToken s_cancellationToken = s_cancellationTokenSource.Token; | ||
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| static Util? s_util; | ||
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| static async Task Main(string[] args) | ||
| { | ||
| string hostname = DefaultHostName; | ||
| if (args.Length > 0) | ||
| { | ||
| hostname = args[0]; | ||
| } | ||
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| s_util = new Util(hostname, "guest", "guest"); | ||
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| AppDomain.CurrentDomain.FirstChanceException += CurrentDomain_FirstChanceException; | ||
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| ConnectionFactory connectionFactory = new() | ||
| { | ||
| HostName = hostname, | ||
| AutomaticRecoveryEnabled = true, | ||
| UserName = "guest", | ||
| Password = "guest", | ||
| ClientProvidedName = ConnectionClientProvidedName | ||
| }; | ||
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| var channelOptions = new CreateChannelOptions(publisherConfirmationsEnabled: true, publisherConfirmationTrackingEnabled: true); | ||
| await using var connection = await connectionFactory.CreateConnectionAsync(); | ||
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| connection.RecoverySucceededAsync += (object sender, AsyncEventArgs ea) => | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw RecoverySucceededAsync, event: {1}", Now, ea); | ||
| _ = CloseConnectionAsync(); | ||
| return Task.CompletedTask; | ||
| }; | ||
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| connection.CallbackExceptionAsync += Connection_CallbackExceptionAsync; | ||
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| connection.ConnectionBlockedAsync += Connection_ConnectionBlockedAsync; | ||
| connection.ConnectionUnblockedAsync += Connection_ConnectionUnblockedAsync; | ||
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| connection.ConnectionRecoveryErrorAsync += Connection_ConnectionRecoveryErrorAsync; | ||
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| connection.ConnectionShutdownAsync += (object sender, ShutdownEventArgs ea) => | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ConnectionShutdownAsync, event: {1}", Now, ea); | ||
| return Task.CompletedTask; | ||
| }; | ||
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| connection.ConsumerTagChangeAfterRecoveryAsync += Connection_ConsumerTagChangeAfterRecoveryAsync; | ||
| connection.QueueNameChangedAfterRecoveryAsync += Connection_QueueNameChangedAfterRecoveryAsync; | ||
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| connection.RecoveringConsumerAsync += Connection_RecoveringConsumerAsync; | ||
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| await using var channel = await connection.CreateChannelAsync(options: channelOptions); | ||
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| channel.CallbackExceptionAsync += Channel_CallbackExceptionAsync; | ||
| channel.ChannelShutdownAsync += Channel_ChannelShutdownAsync; | ||
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| QueueDeclareOk queue = await channel.QueueDeclareAsync(); | ||
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| var consumer = new GH1749Consumer(channel); | ||
| await channel.BasicConsumeAsync(queue.QueueName, true, consumer); | ||
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| _ = CloseConnectionAsync(); | ||
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| Console.WriteLine("{0} [INFO] consumer is running", Util.Now); | ||
| Console.ReadLine(); | ||
| } | ||
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| static async Task CloseConnectionAsync() | ||
| { | ||
| if (s_util is null) | ||
| { | ||
| throw new NullReferenceException("s_util"); | ||
| } | ||
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| try | ||
| { | ||
| Console.WriteLine("{0} [INFO] start closing connection: {1}", Now, ConnectionClientProvidedName); | ||
| await s_util.CloseConnectionAsync(ConnectionClientProvidedName); | ||
| Console.WriteLine("{0} [INFO] done closing connection: {1}", Now, ConnectionClientProvidedName); | ||
| } | ||
| catch (Exception ex) | ||
| { | ||
| Console.Error.WriteLine("{0} [ERROR] error while closing connection: {1}", Now, ex); | ||
| } | ||
| } | ||
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| private static string Now => Util.Now; | ||
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| private static Task Channel_CallbackExceptionAsync(object sender, CallbackExceptionEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] channel saw CallbackExceptionAsync, event: {1}", Now, ea); | ||
| Console.WriteLine("{0} [INFO] channel CallbackExceptionAsync, exception: {1}", Now, ea.Exception); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Channel_ChannelShutdownAsync(object sender, ShutdownEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ChannelShutdownAsync, event: {1}", Now, ea); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static void CurrentDomain_FirstChanceException(object? sender, FirstChanceExceptionEventArgs e) | ||
| { | ||
| if (e.Exception is ObjectDisposedException) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw FirstChanceException, exception: {1}", Now, e.Exception); | ||
| } | ||
| } | ||
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| private static Task Connection_CallbackExceptionAsync(object sender, CallbackExceptionEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] connection saw CallbackExceptionAsync, event: {1}", Now, ea); | ||
| Console.WriteLine("{0} [INFO] connection CallbackExceptionAsync, exception: {1}", Now, ea.Exception); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_ConnectionBlockedAsync(object sender, ConnectionBlockedEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ConnectionBlockedAsync, event: {1}", Now, ea); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_ConnectionUnblockedAsync(object sender, AsyncEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ConnectionUnlockedAsync, event: {1}", Now, ea); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_ConnectionRecoveryErrorAsync(object sender, ConnectionRecoveryErrorEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ConnectionRecoveryErrorAsync, event: {1}", Now, ea); | ||
| Console.WriteLine("{0} [INFO] ConnectionRecoveryErrorAsync, exception: {1}", Now, ea.Exception); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_ConsumerTagChangeAfterRecoveryAsync(object sender, ConsumerTagChangedAfterRecoveryEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw ConsumerTagChangeAfterRecoveryAsync, event: {1}", Now, ea); | ||
| Console.WriteLine("{0} [INFO] ConsumerTagChangeAfterRecoveryAsync, tags: {1} {2}", Now, ea.TagBefore, ea.TagAfter); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_QueueNameChangedAfterRecoveryAsync(object sender, QueueNameChangedAfterRecoveryEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw QueueNameChangedAfterRecoveryAsync, event: {1}", Now, ea); | ||
| Console.WriteLine("{0} [INFO] QueueNameChangedAfterRecoveryAsync, queue names: {1} {2}", Now, ea.NameBefore, ea.NameAfter); | ||
| return Task.CompletedTask; | ||
| } | ||
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| private static Task Connection_RecoveringConsumerAsync(object sender, RecoveringConsumerEventArgs ea) | ||
| { | ||
| Console.WriteLine("{0} [INFO] saw RecoveringConsumerAsync, event: {1}, tag: {2}", Now, ea, ea.ConsumerTag); | ||
| return Task.CompletedTask; | ||
| } | ||
| } | ||
| } | ||
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