/*
* Copyright 2002-2014 the original author or authors.
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.springframework.amqp.rabbit.retry;
import java.util.UUID;
import org.aopalliance.intercept.MethodInterceptor;
import org.aopalliance.intercept.MethodInvocation;
import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.amqp.AmqpRejectAndDontRequeueException;
import org.springframework.amqp.core.Message;
import org.springframework.amqp.core.MessageProperties;
import org.springframework.amqp.rabbit.listener.exception.ListenerExecutionFailedException;
import org.springframework.retry.policy.RetryContextCache;
import org.springframework.util.Assert;
/**
* Advice that can be placed in the listener delegate's advice chain to
* enhance the message with an ID if not present.
* If an exception is caught on a redelivered message, rethrows it as an {@link AmqpRejectAndDontRequeueException}
* which signals the container to NOT requeue the message (otherwise we'd have infinite
* immediate retries).
* If so configured, the broker can send the message to a DLE/DLQ.
* Must be placed before the retry interceptor in the advice chain.
* @author Gary Russell
* @since 1.1.2
*
*/
public class MissingMessageIdAdvice implements MethodInterceptor {
private static final Log logger = LogFactory.getLog(MissingMessageIdAdvice.class);
private final RetryContextCache retryContextCache;
public MissingMessageIdAdvice(RetryContextCache retryContextCache) {
Assert.notNull(retryContextCache, "RetryContextCache must not be null");
this.retryContextCache = retryContextCache;
}
@Override
public Object invoke(MethodInvocation invocation) throws Throwable {
String id = null;
Message message = null;
boolean redelivered = false;
try {
message = (Message) invocation.getArguments()[1];
MessageProperties messageProperties = message.getMessageProperties();
if (messageProperties.getMessageId() == null) {
id = UUID.randomUUID().toString();
messageProperties.setMessageId(id);
}
redelivered = messageProperties.isRedelivered();
return invocation.proceed();
}
catch (Throwable t) {
if (id != null && redelivered) {
if (logger.isDebugEnabled()) {
logger.debug("Canceling delivery of retried message that has no ID");
}
throw new ListenerExecutionFailedException("Cannot retry message without an ID",
new AmqpRejectAndDontRequeueException(t), message);
}
else {
throw t;
}
}
finally {
if (id != null) {
retryContextCache.remove(id);
}
}
}
}