org.apache.rocketmq.client.java.impl.consumer.ConsumeTask Maven / Gradle / Ivy
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* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You 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,
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* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.rocketmq.client.java.impl.consumer;
import java.util.Collections;
import java.util.List;
import java.util.concurrent.Callable;
import org.apache.rocketmq.client.apis.consumer.ConsumeResult;
import org.apache.rocketmq.client.apis.consumer.MessageListener;
import org.apache.rocketmq.client.java.hook.MessageHookPoints;
import org.apache.rocketmq.client.java.hook.MessageHookPointsStatus;
import org.apache.rocketmq.client.java.hook.MessageInterceptor;
import org.apache.rocketmq.client.java.hook.MessageInterceptorContextImpl;
import org.apache.rocketmq.client.java.message.GeneralMessage;
import org.apache.rocketmq.client.java.message.GeneralMessageImpl;
import org.apache.rocketmq.client.java.message.MessageViewImpl;
import org.apache.rocketmq.client.java.misc.ClientId;
import org.apache.rocketmq.shaded.org.slf4j.Logger;
import org.apache.rocketmq.shaded.org.slf4j.LoggerFactory;
public class ConsumeTask implements Callable {
private static final Logger log = LoggerFactory.getLogger(ConsumeTask.class);
private final ClientId clientId;
private final MessageListener messageListener;
private final MessageViewImpl messageView;
private final MessageInterceptor messageInterceptor;
public ConsumeTask(ClientId clientId, MessageListener messageListener, MessageViewImpl messageView,
MessageInterceptor messageInterceptor) {
this.clientId = clientId;
this.messageListener = messageListener;
this.messageView = messageView;
this.messageInterceptor = messageInterceptor;
}
/**
* Invoke {@link MessageListener} to consumer message.
*
* @return message(s) which is consumed successfully.
*/
@Override
public ConsumeResult call() {
ConsumeResult consumeResult;
final List generalMessages = Collections.singletonList(new GeneralMessageImpl(messageView));
MessageInterceptorContextImpl context = new MessageInterceptorContextImpl(MessageHookPoints.CONSUME);
messageInterceptor.doBefore(context, generalMessages);
try {
consumeResult = messageListener.consume(messageView);
} catch (Throwable t) {
log.error("Message listener raised an exception while consuming messages, clientId={}", clientId, t);
// If exception was thrown during the period of message consumption, mark it as failure.
consumeResult = ConsumeResult.FAILURE;
}
MessageHookPointsStatus status = ConsumeResult.SUCCESS.equals(consumeResult) ? MessageHookPointsStatus.OK :
MessageHookPointsStatus.ERROR;
context = new MessageInterceptorContextImpl(context, status);
messageInterceptor.doAfter(context, generalMessages);
// Make sure that the return value is the subset of messageViews.
return consumeResult;
}
}