消息中间件
作用：解耦 削峰 异步
JMS编码总体架构：
一般代码流程
@Test
public void test1(){
//创建连接工厂
ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(MQ_URL);
try {
Connection connection = factory.createConnection();
connection.start();
//创建会话session
Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
//创建目的地(具体是队列还是主题)
Queue queue = session.createQueue("myFirstQueue");
//创建消息的生产者
MessageProducer producer = session.createProducer(queue);
for (int i = 0; i < 3; i++) {
//创建消息
TextMessage message = session.createTextMessage("hello--->"+i);
//通过消息生产者发送消息至mq
producer.send(message);
}
producer.close();
session.close();
connection.close();
}catch (Exception e){
e.printStackTrace();
}
System.out.println("********************");
}
@Test
public void test2(){
//创建连接工厂
ActiveMQConnectionFactory factory = new ActiveMQConnectionFactory(MQ_URL);
try {
Connection connection = factory.createConnection();
connection.start();
//创建会话session
Session session = connection.createSession(false,Session.AUTO_ACKNOWLEDGE);
//创建目的地(具体是队列还是主题)
Queue queue = session.createQueue("myFirstQueue");
//创建消息的消费者
MessageConsumer consumer = session.createConsumer(queue);
for (int i = 0; i < 3; i++) {
TextMessage message = (TextMessage)consumer.receive();
if(message!=null){
System.out.println("receive---->"+message.getText());
}
}
consumer.close();
session.close();
connection.close();
}catch (Exception e){
e.printStackTrace();
}
System.out.println("********************");
}
