RocketMQ事物消息调研

//事物消息生产者，用来发送事物消息
org.apache.rocketmq.client.producer.TransactionMQProducer
//发送事物消息
TransactionMQProducer.sendMessageInTransaction(org.apache.rocketmq.common.message.Message, java.lang.Object)

//事物监听器
org.apache.rocketmq.client.producer.TransactionListener
//prepare消息发送成功时回调应用程序
org.apache.rocketmq.client.producer.TransactionListener.executeLocalTransaction
//消息服务器回查未知事物状态的prepare消息的状态
org.apache.rocketmq.client.producer.TransactionListener.checkLocalTransaction

//QMQ事物监听接口，定义了事物的所有阶段包括开始事物、提交前、提交后、完成后等回调方法，还有事物中增加消息的方法
qunar.tc.qmq.TransactionListener
//QMQ默认实现的事物监听接口，实现增加消息到内存，提交前保存消息到数据库、提交后发送消息
qunar.tc.qmq.producer.tx.DefaultTransactionListener


//消息存储接口，定义了插入消息、完成消息、开始事物、结束事物方法
qunar.tc.qmq.MessageStore
//默认消息存储实现，使用JDBC增删数据库消息
qunar.tc.qmq.producer.tx.spring.DefaultMessageStore


//事物提供者接口，定义了是否事物中、设置事物监听器、消息存储器
qunar.tc.qmq.TransactionProvider
//默认Spring事物管理实现，使用Spring事物管理器实现事物监听
qunar.tc.qmq.producer.tx.spring.SpringTransactionProvider


//消息生产者，发送事物消息需要设置TransactionProvider
qunar.tc.qmq.producer.MessageProducerProvider

import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.client.producer.TransactionListener;
import org.apache.rocketmq.client.producer.TransactionMQProducer;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.common.RemotingHelper;
import java.io.UnsupportedEncodingException;
import java.util.concurrent.ArrayBlockingQueue;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.ThreadPoolExecutor;
import java.util.concurrent.TimeUnit;
public class TransactionProducer {
    public static void main(String[] args) throws MQClientException, InterruptedException {
        TransactionListener transactionListener = new TransactionListenerImpl();
        TransactionMQProducer producer = new TransactionMQProducer("please_rename_unique_group_name");
        ExecutorService executorService = new ThreadPoolExecutor(2, 5, 100, TimeUnit.SECONDS, new ArrayBlockingQueue<Runnable>(2000), new ThreadFactory() {
            @Override
            public Thread newThread(Runnable r) {
                Thread thread = new Thread(r);
                thread.setName("client-transaction-msg-check-thread");
                return thread;
            }
        });


        producer.setExecutorService(executorService);
        producer.setTransactionListener(transactionListener);
        producer.start();


        String[] tags = new String[] {"TagA", "TagB", "TagC", "TagD", "TagE"};
        for (int i = 0; i < 10; i++) {
            try {
                Message msg =
                    new Message("TopicTest1234", tags[i % tags.length], "KEY" + i,
                        ("Hello RocketMQ " + i).getBytes(RemotingHelper.DEFAULT_CHARSET));
                SendResult sendResult = producer.sendMessageInTransaction(msg, null);
                System.out.printf("%s%n", sendResult);


                Thread.sleep(10);
            } catch (MQClientException | UnsupportedEncodingException e) {
                e.printStackTrace();
            }
        }


        for (int i = 0; i < 100000; i++) {
            Thread.sleep(1000);
        }
        producer.shutdown();
    }
}