什麼是ActiveMQ?
ActiveMQ是一種開源的,實作了JMS規範的,面向消息(MOM)的中間件,為應用程式提供高效的、可擴充的、穩定的和安全的企業級消息通信。
什麼是JMS?
Java消息服務指的是兩個應用程式之間進行異步通信的API,它為标準消息協定和消息服務提供了一組通用接口,包括建立、發送、讀取消息等,用于支援JAVA應用程式開發。在J2EE中,當兩個應用程式使用JMS進行通信時,它們之間并不是直接相連的,而是通過一個共同的消息收發服務連接配接起來,可以達到解耦的效果。
Spring Boot整合ActiveMq
1.添加依賴
2.修改application.properties的配置檔案
spring.activemq.broker-url=tcp://localhost:61616
spring.activemq.in-memory=true
3.消息生産者代碼
package com.ls.mq;
import javax.jms.Destination;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jms.core.JmsMessagingTemplate;
import org.springframework.stereotype.Service;
@Service("producer")
public class Producer {
@Autowired
private JmsMessagingTemplate jmsTemplate;
// 發送消息,destination是發送到的隊列,message是待發送的消息
public void sendMessage(Destination destination, final String message){
jmsTemplate.convertAndSend(destination, message);
}
}
4.消息消費者代碼
package com.ls.mq;
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
public class Consumer {
// 使用JmsListener配置消費者監聽的隊列,其中text是接收到的消息
@JmsListener(destination = "mytest.queue")
public void receiveQueue(String text) {
System.out.println("Consumer收到的封包為:"+text);
}
}
5.進行測試
package com.ls.mq;
import javax.jms.Destination;
import org.apache.activemq.command.ActiveMQQueue;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;
@RunWith(SpringRunner.class)
@SpringBootTest
public class SpringbootJmsApplicationTests {
@Autowired
private Producer producer;
@Test
public void contextLoads() throws InterruptedException {
Destination destination = new ActiveMQQueue("mytest.queue");
for(int i=0; i<100; i++){
producer.sendMessage(destination, "lsls!");
}
}
}
注意:測試類必須和消息生産者在同層包中,否則将注入失敗
同時發送和接收topic/queue
1.建立一個JMS的配置類
@Configuration
public class JmsConfig {
public final static String TOPIC = "springboot.topic.test";
public final static String QUEUE = "springboot.queue.test";
@Bean
public Topic topic() {
return new ActiveMQTopic(TOPIC);
}
@Bean
public Queue queue() {
return new ActiveMQQueue(QUEUE);
}
// topic模式的ListenerContainer
@Bean
public JmsListenerContainerFactory<?> jmsListenerContainerTopic(ConnectionFactory activeMQConnectionFactory) {
DefaultJmsListenerContainerFactory bean = new DefaultJmsListenerContainerFactory();
bean.setPubSubDomain(true);
bean.setConnectionFactory(activeMQConnectionFactory);
return bean;
}
// queue模式的ListenerContainer
@Bean
public JmsListenerContainerFactory<?> jmsListenerContainerQueue(ConnectionFactory activeMQConnectionFactory) {
DefaultJmsListenerContainerFactory bean = new DefaultJmsListenerContainerFactory();
bean.setConnectionFactory(activeMQConnectionFactory);
return bean;
}
}
2.然後在寫一個消費者類
@Component
public class Consumer2 {
private final static Logger logger = LoggerFactory.getLogger(JMSConsumer3.class);
@JmsListener(destination = JmsConfig.TOPIC,containerFactory = "jmsListenerContainerTopic")
public void onTopicMessage(String msg) {
logger.info("接收到topic消息:{}",msg);
}
@JmsListener(destination = JmsConfig.QUEUE,containerFactory = "jmsListenerContainerQueue")
public void onQueueMessage(String msg) {
logger.info("接收到queue消息:{}",text);
}
}
3.測試
@Autowired
private Topic topic;
@Autowired
private Queue queue;
@Test
public void testJms2() {
for (int i=0;i<10;i++) {
jmsProducer.sendMessage(queue,"queue,world!" + i);
jmsProducer.sendMessage(topic, "topic,world!" + i);
}
}