54 lines
1.9 KiB
C#
54 lines
1.9 KiB
C#
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using System;
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using System.Threading.Tasks;
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using RabbitMQ.Client.Framing;
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using Tapeti.Config;
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using Tapeti.Helpers;
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namespace Tapeti.Default
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{
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public class PublishResultBinding : IBindingMiddleware
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{
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public void Handle(IBindingContext context, Action next)
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{
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next();
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if (context.Result.HasHandler)
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return;
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bool isTask;
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if (context.Result.Info.ParameterType.IsTypeOrTaskOf(t => t.IsClass, out isTask))
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{
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if (isTask)
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{
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context.Result.SetHandler(async (messageContext, value) =>
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{
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var message = await (Task<object>)value;
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if (message != null)
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await Reply(message, messageContext);
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});
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}
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else
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context.Result.SetHandler((messageContext, value) =>
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value == null ? null : Reply(value, messageContext));
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}
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}
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private Task Reply(object message, IMessageContext messageContext)
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{
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var publisher = (IInternalPublisher)messageContext.DependencyResolver.Resolve<IPublisher>();
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var properties = new BasicProperties();
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// Only set the property if it's not null, otherwise a string reference exception can occur:
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// http://rabbitmq.1065348.n5.nabble.com/SocketException-when-invoking-model-BasicPublish-td36330.html
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if (messageContext.Properties.IsCorrelationIdPresent())
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properties.CorrelationId = messageContext.Properties.CorrelationId;
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if (messageContext.Properties.IsReplyToPresent())
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return publisher.PublishDirect(message, messageContext.Properties.ReplyTo, properties);
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return publisher.Publish(message, properties);
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}
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}
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}
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