package com.alibaba.rocketmq.example.simple;
import com.alibaba.rocketmq.client.consumer.MQPullConsumer;
import com.alibaba.rocketmq.client.consumer.MQPullConsumerScheduleService;
import com.alibaba.rocketmq.client.consumer.PullResult;
import com.alibaba.rocketmq.client.consumer.PullTaskCallback;
import com.alibaba.rocketmq.client.consumer.PullTaskContext;
import com.alibaba.rocketmq.client.exception.MQClientException;
import com.alibaba.rocketmq.common.message.MessageQueue;
import com.alibaba.rocketmq.common.protocol.heartbeat.MessageModel;
public class PullScheduleService {
public static void main(String[] args) throws MQClientException {
final MQPullConsumerScheduleService scheduleService = new MQPullConsumerScheduleService("GroupName1");
scheduleService.setMessageModel(MessageModel.CLUSTERING);
scheduleService.registerPullTaskCallback("TopicTest1", new PullTaskCallback() {
@Override
public void doPullTask(MessageQueue mq, PullTaskContext context) {
MQPullConsumer consumer = context.getPullConsumer();
try {
// 获取从哪里拉取
long offset = consumer.fetchConsumeOffset(mq, false);
if (offset < 0)
offset = 0;
PullResult pullResult = consumer.pull(mq, "*", offset, 32);
System.out.println(offset + "\t" + mq + "\t" + pullResult);
switch (pullResult.getPullStatus()) {
case FOUND:
break;
case NO_MATCHED_MSG:
break;
case NO_NEW_MSG:
case OFFSET_ILLEGAL:
break;
default:
break;
}
// 存储Offset，客户端每隔5s会定时刷新到Broker
consumer.updateConsumeOffset(mq, pullResult.getNextBeginOffset());
// 设置再过100ms后重新拉取
context.setPullNextDelayTimeMillis(100);
}
catch (Exception e) {
e.printStackTrace();
}
}
});
scheduleService.start();
}
}