我是ActiveMQ的新手。我试图在activemq中实现生产者 - 消费者(发送者 - 接收者)。在我的代码中,我很容易通过ActiveMQ发送从单个生产者到单个消费者的消息&。但问题是,我无法将信息发送给同一制作人的多个消费者。向ActiveMQ中的多个消费者发送消息
这里是我的制片 & 消费者类。
MsgProducer.java
package jms_service;
import javax.jms.JMSException;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
public class MsgProducer {
private static String url = "failover://tcp://localhost:61616";
public static javax.jms.ConnectionFactory connFactory;
public static javax.jms.Connection connection;
public static javax.jms.Session mqSession;
public static javax.jms.Topic topic;
public static javax.jms.MessageProducer producer;
public static void main(String[] args) throws JMSException {
connFactory = new ActiveMQConnectionFactory(url);
connection = connFactory.createConnection("system","manager");
connection.start();
mqSession = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
topic = mqSession.createTopic("RealTimeData");
producer = mqSession.createProducer(topic);
producer.setTimeToLive(30000);
TextMessage message = mqSession.createTextMessage();
int seq_id =1;
while(true)
{
message.setText("Hello world | " +"seq_id #"+seq_id);
producer.send(message);
seq_id++;
System.out.println("sent_msg =>> "+ message.getText());
// if(seq_id>100000) break;
try {
Thread.sleep(1000);
}
catch (InterruptedException e) { e.printStackTrace();}
}
}
}
MsgConsumer.java
package jms_service;
import java.text.SimpleDateFormat;
import java.util.Calendar;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageListener;
import javax.jms.Session;
import javax.jms.TextMessage;
import org.apache.activemq.ActiveMQConnectionFactory;
public class MsgConsumer {
private static String url = "failover://tcp://localhost:61616";
public static javax.jms.ConnectionFactory connFactory;
public static javax.jms.Connection connection;
public static javax.jms.Session mqSession;
public static javax.jms.Topic topic;
public static javax.jms.MessageConsumer consumer;
public static void main(String[] args) throws JMSException, InterruptedException {
connFactory = new ActiveMQConnectionFactory(url);
connection = connFactory.createConnection("system", "manager");
connection.setClientID("0002");
//connection.start();
mqSession = connection.createSession(true, Session.CLIENT_ACKNOWLEDGE);
topic = mqSession.createTopic("RealTimeData");
consumer = mqSession.createDurableSubscriber(topic, "SUBS01");
connection.start();
MessageListener listner = new MessageListener() {
public void onMessage(Message message) {
try {
if (message instanceof TextMessage) {
TextMessage txtmsg = (TextMessage) message;
Calendar cal = Calendar.getInstance();
//cal.getTime();
SimpleDateFormat sdf = new SimpleDateFormat("HH:mm:ss");
String time = sdf.format(cal.getTime());
String msg="received_message =>> "+ txtmsg.getText() + " | received_at :: "+time;
System.out.println(msg);
//consumer.sendData(msg);
}
} catch (JMSException e) {
System.out.println("Caught:" + e);
e.printStackTrace();
}
}
};
consumer.setMessageListener(listner);
}
}
谁能帮助找出发送消息给多个消费者的方式。 在此先感谢。
究竟是什么问题? – 2014-08-29 08:07:49
你有一个硬编码的客户端ID ...我承认我不知道ActiveMQ,但我可以想象这是一个原因。 – Fildor 2014-08-29 08:27:37
“如果在调用此方法时具有相同clientID的另一个连接已在运行,则JMS提供程序应检测到重复ID并引发InvalidClientIDException。” – Fildor 2014-08-29 08:30:26