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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,
* 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.apache.rocketmq.client.consumer;
import java.util.Iterator;
import java.util.Map.Entry;
import java.util.Set;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.log.ClientLogger;
import org.apache.rocketmq.common.ThreadFactoryImpl;
import org.apache.rocketmq.common.message.MessageQueue;
import org.apache.rocketmq.common.protocol.NamespaceUtil;
import org.apache.rocketmq.common.protocol.heartbeat.MessageModel;
import org.apache.rocketmq.logging.InternalLogger;
import org.apache.rocketmq.remoting.RPCHook;
/**
* Schedule service for pull consumer.
* This Consumer will be removed in 2022, and a better implementation {@link
* DefaultLitePullConsumer} is recommend to use in the scenario of actively pulling messages.
*/
public class MQPullConsumerScheduleService {
private final InternalLogger log = ClientLogger.getLog();
private final MessageQueueListener messageQueueListener = new MessageQueueListenerImpl();
private final ConcurrentMap taskTable =
new ConcurrentHashMap();
private DefaultMQPullConsumer defaultMQPullConsumer;
private int pullThreadNums = 20;
private ConcurrentMap callbackTable =
new ConcurrentHashMap();
private ScheduledThreadPoolExecutor scheduledThreadPoolExecutor;
public MQPullConsumerScheduleService(final String consumerGroup) {
this.defaultMQPullConsumer = new DefaultMQPullConsumer(consumerGroup);
this.defaultMQPullConsumer.setMessageModel(MessageModel.CLUSTERING);
}
public MQPullConsumerScheduleService(final String consumerGroup, final RPCHook rpcHook) {
this.defaultMQPullConsumer = new DefaultMQPullConsumer(consumerGroup, rpcHook);
this.defaultMQPullConsumer.setMessageModel(MessageModel.CLUSTERING);
}
public void putTask(String topic, Set mqNewSet) {
Iterator> it = this.taskTable.entrySet().iterator();
while (it.hasNext()) {
Entry next = it.next();
if (next.getKey().getTopic().equals(topic)) {
if (!mqNewSet.contains(next.getKey())) {
next.getValue().setCancelled(true);
it.remove();
}
}
}
for (MessageQueue mq : mqNewSet) {
if (!this.taskTable.containsKey(mq)) {
PullTaskImpl command = new PullTaskImpl(mq);
this.taskTable.put(mq, command);
this.scheduledThreadPoolExecutor.schedule(command, 0, TimeUnit.MILLISECONDS);
}
}
}
public void start() throws MQClientException {
final String group = this.defaultMQPullConsumer.getConsumerGroup();
this.scheduledThreadPoolExecutor = new ScheduledThreadPoolExecutor(
this.pullThreadNums,
new ThreadFactoryImpl("PullMsgThread-" + group)
);
this.defaultMQPullConsumer.setMessageQueueListener(this.messageQueueListener);
this.defaultMQPullConsumer.start();
log.info("MQPullConsumerScheduleService start OK, {} {}",
this.defaultMQPullConsumer.getConsumerGroup(), this.callbackTable);
}
public void registerPullTaskCallback(final String topic, final PullTaskCallback callback) {
this.callbackTable.put(NamespaceUtil.wrapNamespace(this.defaultMQPullConsumer.getNamespace(), topic), callback);
this.defaultMQPullConsumer.registerMessageQueueListener(topic, null);
}
public void shutdown() {
if (this.scheduledThreadPoolExecutor != null) {
this.scheduledThreadPoolExecutor.shutdown();
}
if (this.defaultMQPullConsumer != null) {
this.defaultMQPullConsumer.shutdown();
}
}
public ConcurrentMap getCallbackTable() {
return callbackTable;
}
public void setCallbackTable(ConcurrentHashMap callbackTable) {
this.callbackTable = callbackTable;
}
public int getPullThreadNums() {
return pullThreadNums;
}
public void setPullThreadNums(int pullThreadNums) {
this.pullThreadNums = pullThreadNums;
}
public DefaultMQPullConsumer getDefaultMQPullConsumer() {
return defaultMQPullConsumer;
}
public void setDefaultMQPullConsumer(DefaultMQPullConsumer defaultMQPullConsumer) {
this.defaultMQPullConsumer = defaultMQPullConsumer;
}
public MessageModel getMessageModel() {
return this.defaultMQPullConsumer.getMessageModel();
}
public void setMessageModel(MessageModel messageModel) {
this.defaultMQPullConsumer.setMessageModel(messageModel);
}
class MessageQueueListenerImpl implements MessageQueueListener {
@Override
public void messageQueueChanged(String topic, Set mqAll, Set mqDivided) {
MessageModel messageModel =
MQPullConsumerScheduleService.this.defaultMQPullConsumer.getMessageModel();
switch (messageModel) {
case BROADCASTING:
MQPullConsumerScheduleService.this.putTask(topic, mqAll);
break;
case CLUSTERING:
MQPullConsumerScheduleService.this.putTask(topic, mqDivided);
break;
default:
break;
}
}
}
public class PullTaskImpl implements Runnable {
private final MessageQueue messageQueue;
private volatile boolean cancelled = false;
public PullTaskImpl(final MessageQueue messageQueue) {
this.messageQueue = messageQueue;
}
@Override
public void run() {
String topic = this.messageQueue.getTopic();
if (!this.isCancelled()) {
PullTaskCallback pullTaskCallback =
MQPullConsumerScheduleService.this.callbackTable.get(topic);
if (pullTaskCallback != null) {
final PullTaskContext context = new PullTaskContext();
context.setPullConsumer(MQPullConsumerScheduleService.this.defaultMQPullConsumer);
try {
pullTaskCallback.doPullTask(this.messageQueue, context);
} catch (Throwable e) {
context.setPullNextDelayTimeMillis(1000);
log.error("doPullTask Exception", e);
}
if (!this.isCancelled()) {
MQPullConsumerScheduleService.this.scheduledThreadPoolExecutor.schedule(this,
context.getPullNextDelayTimeMillis(), TimeUnit.MILLISECONDS);
} else {
log.warn("The Pull Task is cancelled after doPullTask, {}", messageQueue);
}
} else {
log.warn("Pull Task Callback not exist , {}", topic);
}
} else {
log.warn("The Pull Task is cancelled, {}", messageQueue);
}
}
public boolean isCancelled() {
return cancelled;
}
public void setCancelled(boolean cancelled) {
this.cancelled = cancelled;
}
public MessageQueue getMessageQueue() {
return messageQueue;
}
}
}
