提示:下面以Mac为例,windows用户可参考。
这里推荐下载binary包。不推荐下载source包,还得需要自己再编译一遍。
在rocket mq 的github readme里有dashboard的下载链接,是source包,
下载后,设置一下rocketmq.config.namesrvAddr值,然后再通过mvn打成jar包。
Mac上启动nameServer的命令如下
nohup ./bin/mqnamesrv &
Mac上启动Broker的命令如下
nohup ./bin/mqbroker -n localhost:9876 &
看nameServer和Broker是否启动成功, 输入Jps命令查看进程NameSrvStartUp和BrokerStartup是否存在即可。
启动dashboard的命令如下
java -jar xx-dashborad.jar
生产者消费者Demo:
在搭建好nameServer和Broker后,即搭建好了消息存储的平台,所以现在需要生产者生产消息,消费者消费消息。下面以IDEA展示。
1. 新建Maven工程,引入依赖 <dependencies>
<dependency>
<groupId>org.apache.rocketmq</groupId>
<artifactId>rocketmq-client</artifactId>
<version>4.9.1</version>
</dependency>
</dependencies>
2. 生产者生产消息
import org.apache.rocketmq.client.exception.MQBrokerException;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.client.producer.DefaultMQProducer;
import org.apache.rocketmq.client.producer.SendResult;
import org.apache.rocketmq.common.message.Message;
import org.apache.rocketmq.remoting.common.RemotingHelper;
import org.apache.rocketmq.remoting.exception.RemotingException;
import java.io.UnsupportedEncodingException;
public class Producer {
public static void main(String[] args) throws MQClientException, UnsupportedEncodingException, MQBrokerException, RemotingException, InterruptedException {
// 实例化消息生产者Producer
DefaultMQProducer producer = new DefaultMQProducer("Producer_ycx");
// 设置NameServer的地址
producer.setNamesrvAddr("localhost:9876");
// 启动Producer实例
producer.start();
for (int i = 0; i < 10; i++) {
// 创建消息,并指定Topic,Tag和消息体
Message msg = new Message("TopicTest" /* Topic */,
"TagC" /* Tag */,
("Hello ycx " + i).getBytes(RemotingHelper.DEFAULT_CHARSET) /* Message body */
);
// 发送消息到一个Broker
SendResult sendResult = producer.send(msg);
// 通过sendResult返回消息是否成功送达
System.out.printf("%s%n", sendResult);
}
// 如果不再发送消息,关闭Producer实例。
producer.shutdown();
}
}
3. 消费者消费消息
import org.apache.rocketmq.client.consumer.DefaultMQPushConsumer;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyContext;
import org.apache.rocketmq.client.consumer.listener.ConsumeConcurrentlyStatus;
import org.apache.rocketmq.client.consumer.listener.MessageListenerConcurrently;
import org.apache.rocketmq.client.exception.MQClientException;
import org.apache.rocketmq.common.message.MessageExt;
import java.util.List;
public class Consumer {
public static void main(String[] args) throws MQClientException {
// 实例化消费者
DefaultMQPushConsumer consumer = new DefaultMQPushConsumer("Consumer_ycx");
// 设置NameServer的地址
consumer.setNamesrvAddr("localhost:9876");
// 订阅一个或者多个Topic,以及Tag来过滤需要消费的消息
consumer.subscribe("TopicTest", "*");
// 注册回调实现类来处理从broker拉取回来的消息
consumer.registerMessageListener(new MessageListenerConcurrently() {
@Override
public ConsumeConcurrentlyStatus consumeMessage(List<MessageExt> msgs, ConsumeConcurrentlyContext context) {
//System.out.printf("%s Receive New Messages: %s %n", Thread.currentThread().getName(), msgs);
for (int i = 0; i <msgs.size() ; i++) {
System.out.println("Receive New Message: "+new String(msgs.get(i).getBody()));
}
// 标记该消息已经被成功消费
return ConsumeConcurrentlyStatus.CONSUME_SUCCESS;
}
});
// 启动消费者实例
consumer.start();
System.out.printf("Consumer Started.%n");
}
}
更多的demo可参考官方文档
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