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Big fix for erroneously double playing messages when running with Sol…
…o durability
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src/Persistence/DuplicateMessageSending/DuplicateMessageSending.csproj
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| <Project Sdk="Microsoft.NET.Sdk"> | ||
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| <PropertyGroup> | ||
| <OutputType>Exe</OutputType> | ||
| <TargetFramework>net8.0</TargetFramework> | ||
| <ImplicitUsings>enable</ImplicitUsings> | ||
| <Nullable>enable</Nullable> | ||
| </PropertyGroup> | ||
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| <ItemGroup> | ||
| <ProjectReference Include="..\..\Transports\RabbitMQ\Wolverine.RabbitMQ\Wolverine.RabbitMQ.csproj" /> | ||
| <ProjectReference Include="..\Wolverine.Marten\Wolverine.Marten.csproj" /> | ||
| </ItemGroup> | ||
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| <ItemGroup> | ||
| <Compile Include="..\..\Servers.cs"> | ||
| <Link>Servers.cs</Link> | ||
| </Compile> | ||
| </ItemGroup> | ||
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| </Project> |
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| @@ -0,0 +1,114 @@ | ||
| using System.Collections.Concurrent; | ||
| using IntegrationTests; | ||
| using Marten; | ||
| using Microsoft.Extensions.DependencyInjection; | ||
| using Microsoft.Extensions.Hosting; | ||
| using Microsoft.Extensions.Logging; | ||
| using Oakton; | ||
| using Oakton.Resources; | ||
| using Wolverine; | ||
| using Wolverine.Marten; | ||
| using Wolverine.Postgresql; | ||
| using Wolverine.RabbitMQ; | ||
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| // Postgres if true, Rabbit if false | ||
| var usePostgres = false; | ||
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| await Host.CreateDefaultBuilder(args) | ||
| .UseWolverine(opts => | ||
| { | ||
| if (usePostgres) | ||
| { | ||
| opts.PublishMessage<Ping>().ToPostgresqlQueue("ping_queue"); | ||
| opts.PublishMessage<Pong>().ToPostgresqlQueue("pong_queue"); | ||
| opts.ListenToPostgresqlQueue("ping_queue"); | ||
| opts.ListenToPostgresqlQueue("pong_queue"); | ||
| } | ||
| else | ||
| { | ||
| opts.UseRabbitMq(new Uri("amqp://localhost")); | ||
| opts.PublishMessage<Ping>().ToRabbitQueue("ping_queue"); | ||
| opts.PublishMessage<Pong>().ToRabbitQueue("pong_queue"); | ||
| opts.ListenToRabbitQueue("ping_queue") | ||
| .PreFetchCount(10) | ||
| .ListenerCount(5) | ||
| .UseDurableInbox(); // Remove durable inbox and the problem goes away | ||
| opts.ListenToRabbitQueue("pong_queue") | ||
| .PreFetchCount(10) | ||
| .ListenerCount(5) | ||
| .ProcessInline(); | ||
| } | ||
| opts.Services.AddResourceSetupOnStartup(); | ||
| opts.Durability.Mode = DurabilityMode.Solo; | ||
| }) | ||
| .ConfigureServices(services => | ||
| { | ||
| services.AddHostedService<Sender>(); | ||
| services.AddMarten(opts => | ||
| { | ||
| opts.Connection(Servers.PostgresConnectionString); | ||
| opts.DisableNpgsqlLogging = true; | ||
| }) | ||
| .IntegrateWithWolverine("public", transportSchemaName: "public") | ||
| .ApplyAllDatabaseChangesOnStartup(); | ||
| }) | ||
| .UseResourceSetupOnStartup() | ||
| .RunOaktonCommands(args); | ||
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| public class Sender(ILogger<Sender> logger, IMessageBus bus) : BackgroundService | ||
| { | ||
| static ConcurrentDictionary<string, bool> _sentMessages = new(); | ||
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| protected override async Task ExecuteAsync(CancellationToken stoppingToken) | ||
| { | ||
| var uid = Random.Shared.Next(0, 1_000_000); // to avoid any previous message from an earlier run to interfere with this run | ||
| for (var i = 0; i < 200; i++) | ||
| { | ||
| var pingNumber = $"{uid} - {i}"; | ||
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| if (!_sentMessages.TryAdd(pingNumber, true)) | ||
| { | ||
| logger.LogError("DUPLICATE PING GOING OUT WITH NUMBER " + pingNumber); | ||
| } | ||
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| logger.LogInformation("Sending Ping #{Number}", pingNumber); | ||
| await bus.PublishAsync(new Ping(pingNumber)); | ||
| } | ||
| } | ||
| } | ||
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| public class MessageHandler | ||
| { | ||
| private static ConcurrentDictionary<string, int> _receivedMessages = new(); | ||
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| public Pong Handle(Ping ping, ILogger<MessageHandler> logger, Envelope envelope) | ||
| { | ||
| //_tracker.Track(envelope); | ||
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| logger.LogInformation("Received Ping #{Number}", ping.Id); | ||
| Thread.Sleep(1000); // await Task.Delay(1000); produces same result. I use Thread.Sleep to exclude potential async/await issues | ||
| return new Pong(ping.Id); | ||
| } | ||
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| public static void Handle(Pong pong, ILogger<MessageHandler> logger, Envelope envelope) | ||
| { | ||
| if (_receivedMessages.TryAdd(pong.Id, 1)) | ||
| { | ||
| logger.LogInformation("Received Pong #{Number}", pong.Id); | ||
| } | ||
| else | ||
| { | ||
| logger.LogError("Received Pong #{Number} as Duplicate with Id {Id} and attempt {Attempt}", pong.Id, envelope.Id, envelope.Attempts); | ||
| } | ||
| } | ||
| } | ||
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| public record Ping(string Id); | ||
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| public record Pong(string Id); |
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