非阻塞式的服务间项目通信.
一对一推送 ,一对多订
queue 多对一
topic 多对多
问题
•
MQ使用中意外重启或崩掉，MQ发送方可以重连，MQ接收方必须重启进程才可以重连。解决方案：新建一个断链重连Listen接口，需要重连的接收方注册监听器（实现重新注册MQ），服务端启动一个Monitor线程（守护）轮询MQ服务器，发现断链，调用所有监听器。
<bean id="mqFactory" class="org.apache.activemq.ActiveMQConnectionFactory">
<constructor-arg value="tcp://localhost:61616" />
</bean>
<bean id="mqConnection" factory-bean="mqFactory" factory-method="createConnection" init-method="start"/>import org.apache.activemq.ActiveMQConnectionFactory;
import javax.jms.Connection;
import javax.jms.DeliveryMode;
import javax.jms.Destination;
import javax.jms.ExceptionListener;
import javax.jms.JMSException;
import javax.jms.Message;
import javax.jms.MessageConsumer;
import javax.jms.MessageProducer;
import javax.jms.Session;
import javax.jms.TextMessage;
/**
* Hello world!
*/
public class JavaClient {
public static void main(String[] args) throws Exception {
thread(new HelloWorldProducer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
Thread.sleep(1000);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
Thread.sleep(1000);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldProducer(), false);
Thread.sleep(1000);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldConsumer(), false);
thread(new HelloWorldProducer(), false);
}
public static void thread(Runnable runnable, boolean daemon) {
Thread brokerThread = new Thread(runnable);
brokerThread.setDaemon(daemon);
brokerThread.start();
}
//生产者
public static class HelloWorldProducer implements Runnable {
public void run() {
try {
// Create a ConnectionFactory
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
// Create a Connection
Connection connection = connectionFactory.createConnection();
connection.start();
// Create a Session
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Create the destination (Topic or Queue)
Destination destination = session.createQueue("TEST.FOO");
// Create a MessageProducer from the Session to the Topic or Queue
MessageProducer producer = session.createProducer(destination);
producer.setDeliveryMode(DeliveryMode.NON_PERSISTENT);
// Create a messages
String text = "Hello world! From: " + Thread.currentThread().getName() + " :" + this.hashCode();
TextMessage message = session.createTextMessage(text);
// Tell the producer to send the message
System.out.println("Sent message: "+ message.hashCode() + " : " + Thread.currentThread().getName());
producer.send(message);
// Clean up
session.close();
connection.close();
}
catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
}
}
//消费者
public static class HelloWorldConsumer implements Runnable, ExceptionListener {
public void run() {
try {
// Create a ConnectionFactory
ActiveMQConnectionFactory connectionFactory = new ActiveMQConnectionFactory("tcp://localhost:61616");
// Create a Connection
Connection connection = connectionFactory.createConnection();
connection.start();
connection.setExceptionListener(this);
// Create a Session
Session session = connection.createSession(false, Session.AUTO_ACKNOWLEDGE);
// Create the destination (Topic or Queue)
Destination destination = session.createQueue("TEST.FOO");
// Create a MessageConsumer from the Session to the Topic or Queue
MessageConsumer consumer = session.createConsumer(destination);
// Wait for a message
Message message = consumer.receive(1000);
if (message instanceof TextMessage) {
TextMessage textMessage = (TextMessage) message;
String text = textMessage.getText();
System.out.println("Received: " + text);
} else {
System.out.println("Received: " + message);
}
consumer.close();
session.close();
connection.close();
} catch (Exception e) {
System.out.println("Caught: " + e);
e.printStackTrace();
}
}
public synchronized void onException(JMSException ex) {
System.out.println("JMS Exception occured. Shutting down client.");
}
}
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