Package com.github.dbmdz.flusswerk.framework.rabbitmq

Class MessageBroker

java.lang.Object

com.github.dbmdz.flusswerk.framework.rabbitmq.MessageBroker

public class MessageBroker
extends Object

A MessageBroker provides a high level API to interact with an MessageBroker like RabbitMQ and provides the framework engines logic for message operations like sending, retrieving or rejecting for messages.

Constructor Summary

Constructors

Constructor	Description
MessageBroker(RoutingProperties routing, RabbitClient rabbitClient)

Method Summary

Modifier and Type	Method	Description
void	ack(Message message)	Acknowledges a message to remove it from the queue.
void	fail(Message message)
Map<String,Long>	getRetryMessageCounts()
Message	receive()	Gets one message from the input queue but does not acknowledge it.
Message	receive(String queueName)	Gets one message from the queue but does not acknowledge it.
boolean	reject(Message message)	Rejects a messaging and takes care of proper dead lettering, retries and, if the message failed too often, routing to the failed queue.
void	send(Collection<? extends Message> messages)	Deprecated. Use Topic.send(Message) instead

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

MessageBroker

public MessageBroker(RoutingProperties routing,
                     RabbitClient rabbitClient)
              throws IOException

Throws:

IOException

Method Detail

send

@Deprecated
public void send(Collection<? extends Message> messages)
          throws IOException

Deprecated.

Use Topic.send(Message) instead

Sends messages to the default output queue as JSON document.

Parameters:

messages - the message to send.

Throws:

IOException - if sending the message fails.

receive

public Message receive(String queueName)
                throws IOException,
                       InvalidMessageException

Gets one message from the queue but does not acknowledge it. To do so, use ack(Message).

Parameters:

queueName - the queue to receive.

Returns:

the received message.

Throws:

IOException - if communication with RabbitMQ failed.

InvalidMessageException - if the message could not be read and deserialized

receive

public Message receive()
                throws IOException

Gets one message from the input queue but does not acknowledge it. To do so, use ack(Message).

Returns:

the received message.

Throws:

IOException - if communication with RabbitMQ failed.

ack

public void ack(Message message)
         throws IOException

Acknowledges a message to remove it from the queue.

Parameters:

message - the message to acknowledge.

Throws:

IOException - if communication with RabbitMQ failed.

reject

public boolean reject(Message message)
               throws IOException

Rejects a messaging and takes care of proper dead lettering, retries and, if the message failed too often, routing to the failed queue.

Parameters:

message - the message to reject

Returns:

true if retry, false if failed

Throws:

IOException - if communication with RabbitMQ failed

fail

public void fail(Message message)
          throws IOException

Throws:

IOException

getRetryMessageCounts

public Map<String,Long> getRetryMessageCounts()
                                             throws IOException

Throws:

IOException