static void Main(string[] args)
{
var rmqMessageConsumer = new RmqMessageConsumer(HOSTNAME, QUEUE_NAME);
rmqMessageConsumer.MessageReceived += (message) => Console.WriteLine($"Message received: {message}");
rmqMessageConsumer.StartMessageConsumer();
Console.WriteLine("Press [enter] to exit");
Console.ReadLine();
rmqMessageConsumer.StopMessageConsumer();
}
public RMQMessageConsumerRetryDLQTests()
{
Guid correlationId = Guid.NewGuid();
string contentType = "text\\plain";
var channelName = $"Requeue-Limit-Tests-{Guid.NewGuid().ToString()}";
_topicName = $"Requeue-Limit-Tests-{Guid.NewGuid().ToString()}";
var routingKey = new RoutingKey(_topicName);
//what do we send
var myCommand = new MyDeferredCommand {
Value = "Hello Requeue"
};
_message = new Message(
new MessageHeader(myCommand.Id, _topicName, MessageType.MT_COMMAND, correlationId, "", contentType),
new MessageBody(JsonSerializer.Serialize((object)myCommand, JsonSerialisationOptions.Options))
);
var deadLetterQueueName = $"{_message.Header.Topic}.DLQ";
var deadLetterRoutingKey = $"{_message.Header.Topic}.DLQ";
var subscription = new RmqSubscription <MyCommand>(
name: new SubscriptionName(channelName),
channelName: new ChannelName(channelName),
routingKey: routingKey,
//after 2 retries, fail and move to the DLQ
requeueCount: 2,
//delay before re-queuing
requeueDelayInMilliseconds: 50,
deadLetterChannelName: new ChannelName(deadLetterQueueName),
deadLetterRoutingKey: deadLetterRoutingKey,
makeChannels: OnMissingChannel.Create
);
var rmqConnection = new RmqMessagingGatewayConnection
{
AmpqUri = new AmqpUriSpecification(new Uri("amqp://*****:*****@localhost:5672/%2f")),
Exchange = new Exchange("paramore.brighter.exchange"),
DeadLetterExchange = new Exchange("paramore.brighter.exchange.dlq")
};
//how do we send to the queue
_sender = new RmqMessageProducer(rmqConnection, new RmqPublication());
//set up our receiver
_channelFactory = new ChannelFactory(new RmqMessageConsumerFactory(rmqConnection));
_channel = _channelFactory.CreateChannel(subscription);
//how do we handle a command
IHandleRequests <MyDeferredCommand> handler = new MyDeferredCommandHandler();
//hook up routing for the command processor
var subscriberRegistry = new SubscriberRegistry();
subscriberRegistry.Register <MyDeferredCommand, MyDeferredCommandHandler>();
//once we read, how do we dispatch to a handler. N.B. we don't use this for reading here
_commandProcessor = new CommandProcessor(
subscriberRegistry: subscriberRegistry,
handlerFactory: new QuickHandlerFactory(() => handler),
requestContextFactory: new InMemoryRequestContextFactory(),
policyRegistry: new PolicyRegistry()
);
//pump messages from a channel to a handler - in essence we are building our own dispatcher in this test
IAmAMessageMapper <MyDeferredCommand> mapper = new MyDeferredCommandMessageMapper(_topicName);
_messagePump = new MessagePumpBlocking <MyDeferredCommand>(_commandProcessor, mapper)
{
Channel = _channel, TimeoutInMilliseconds = 5000, RequeueCount = 3
};
_deadLetterConsumer = new RmqMessageConsumer(
connection: rmqConnection,
queueName: deadLetterQueueName,
routingKey: deadLetterRoutingKey,
isDurable: false,
makeChannels: OnMissingChannel.Assume
);
}