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Making sure AsyncEventHandlers are all run. Fixes issue #838. #839

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Merged
merged 1 commit into from
May 20, 2020
Merged

Making sure AsyncEventHandlers are all run. Fixes issue #838. #839

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6 changes: 1 addition & 5 deletions projects/RabbitMQ.Client/client/api/AsyncDefaultBasicConsumer.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -140,11 +140,7 @@ public virtual Task HandleModelShutdown(object model, ShutdownEventArgs reason)
public virtual async Task OnCancel(params string[] consumerTags)
{
IsRunning = false;
foreach (AsyncEventHandler<ConsumerEventArgs> h in ConsumerCancelled?.GetInvocationList() ?? Array.Empty<Delegate>())
{
await h(this, new ConsumerEventArgs(consumerTags)).ConfigureAwait(false);
}

await ConsumerCancelled.InvokeAsync(this, new ConsumerEventArgs(consumerTags)).ConfigureAwait(false);
foreach (string consumerTag in consumerTags)
{
_consumerTags.Remove(consumerTag);
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16 changes: 15 additions & 1 deletion projects/RabbitMQ.Client/client/events/AsyncEventHandler.cs
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Expand Up @@ -4,4 +4,18 @@
namespace RabbitMQ.Client.Events
{
public delegate Task AsyncEventHandler<in TEvent>(object sender, TEvent @event) where TEvent : EventArgs;
}

internal static class AsyncEventHandlerExtensions
{
public static async Task InvokeAsync<TEvent>(this AsyncEventHandler<TEvent> eventHandler, object sender, TEvent @event) where TEvent : EventArgs
{
if(eventHandler != null)
{
foreach(AsyncEventHandler<TEvent> handlerInstance in eventHandler.GetInvocationList())
{
await handlerInstance(sender, @event).ConfigureAwait(false);
}
}
}
}
}
10 changes: 5 additions & 5 deletions projects/RabbitMQ.Client/client/events/AsyncEventingBasicConsumer.cs
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Expand Up @@ -34,28 +34,28 @@ public AsyncEventingBasicConsumer(IModel model) : base(model)
public override async Task HandleBasicCancelOk(string consumerTag)
{
await base.HandleBasicCancelOk(consumerTag).ConfigureAwait(false);
await (Unregistered?.Invoke(this, new ConsumerEventArgs(new[] { consumerTag })) ?? Task.CompletedTask).ConfigureAwait(false);
await Unregistered.InvokeAsync(this, new ConsumerEventArgs(new[] { consumerTag })).ConfigureAwait(false);
}

///<summary>Fires when the server confirms successful consumer registration.</summary>
public override async Task HandleBasicConsumeOk(string consumerTag)
{
await base.HandleBasicConsumeOk(consumerTag).ConfigureAwait(false);
await (Registered?.Invoke(this, new ConsumerEventArgs(new[] { consumerTag })) ?? Task.CompletedTask).ConfigureAwait(false);
await Registered.InvokeAsync(this, new ConsumerEventArgs(new[] { consumerTag })).ConfigureAwait(false);
}

///<summary>Fires the Received event.</summary>
public override async Task HandleBasicDeliver(string consumerTag, ulong deliveryTag, bool redelivered, string exchange, string routingKey, IBasicProperties properties, ReadOnlyMemory<byte> body)
{
await base.HandleBasicDeliver(consumerTag, deliveryTag, redelivered, exchange, routingKey, properties, body);
await (Received?.Invoke(this, new BasicDeliverEventArgs(consumerTag, deliveryTag, redelivered, exchange, routingKey, properties, body)) ?? Task.CompletedTask).ConfigureAwait(false);
await base.HandleBasicDeliver(consumerTag, deliveryTag, redelivered, exchange, routingKey, properties, body).ConfigureAwait(false);
await Received.InvokeAsync(this, new BasicDeliverEventArgs(consumerTag, deliveryTag, redelivered, exchange, routingKey, properties, body)).ConfigureAwait(false);
}

///<summary>Fires the Shutdown event.</summary>
public override async Task HandleModelShutdown(object model, ShutdownEventArgs reason)
{
await base.HandleModelShutdown(model, reason).ConfigureAwait(false);
await (Shutdown?.Invoke(this, reason) ?? Task.CompletedTask).ConfigureAwait(false);
await Shutdown.InvokeAsync(this, reason).ConfigureAwait(false);
}
}
}