org.apache.rocketmq.example.schedule.TimerMessageProducer Maven / Gradle / Ivy
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* 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
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* 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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package org.apache.rocketmq.example.schedule;
import java.nio.charset.StandardCharsets;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
public class TimerMessageProducer {
//Note: TimerMessage is a new feature in version 5.0, so be sure to upgrade RocketMQ to version 5.0+ before using it.
public static final String PRODUCER_GROUP = "TimerMessageProducerGroup";
public static final String DEFAULT_NAMESRVADDR = "127.0.0.1:9876";
public static final String TOPIC = "TimerTopic";
public static void main(String[] args) throws Exception {
// Instantiate a producer to send scheduled messages
DefaultMQProducer producer = new DefaultMQProducer(PRODUCER_GROUP);
// Uncomment the following line while debugging, namesrvAddr should be set to your local address
// producer.setNamesrvAddr(DEFAULT_NAMESRVADDR);
// Launch producer
producer.start();
int totalMessagesToSend = 10;
for (int i = 0; i < totalMessagesToSend; i++) {
Message message = new Message(TOPIC, ("Hello scheduled message " + i).getBytes(StandardCharsets.UTF_8));
// This message will be delivered to consumer 10 seconds later.
//message.setDelayTimeSec(10);
// The effect is the same as the above
// message.setDelayTimeMs(10_000L);
// Set the specific delivery time, and the effect is the same as the above
message.setDeliverTimeMs(System.currentTimeMillis() + 10_000L);
// Send the message
SendResult result = producer.send(message);
System.out.printf(result + "\n");
}
// Shutdown producer after use.
producer.shutdown();
}
}