lizhiboo commented on issue #4339:
URL: https://github.com/apache/rocketmq/issues/4339#issuecomment-1131586949
@fll666888 u can refer following code
```java
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();
}
}
```
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