The javax.jms.ConnectionFactory interface provides a standard method for creating a javax.jms.Connection, which is used to interact with a JMS broker. Although Spring needs a ConnectionFactory in order to use JMS, it is usually not necessary to use it directly, but relies on the upper-level message abstraction, and Spring Boot automatically configures the infrastructure needed to send and receive messages.
Spring Boot configures a ConnectionFactory if ActiveMQ is found to be available on the classpath. If a proxy is required, an embedded, auto-configured proxy will be enabled (as long as the proxy URL is not specified in the configuration).
Introduce spring-boot-starter-activemq and add the following configuration to the pom.xml configuration file (based on the pom.xml file in the previous chapter "Spring Boot Construction Framework"):
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-activemq</artifactId>
</dependency>
ActiveMQ configuration is controlled via external configuration in spring.activemq.*. Add the following to the application.properties configuration file:
spring.activemq.broker-url=tcp://192.168.1.100:9876
spring.activemq.user=admin
spring.activemq.password=secret
By default ActiveMQ will create a target if it doesn't exist, so the target is resolved by the name they provide.
Application Integration AxtiveQ Support Case
Message producer, the specific code is as follows:
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 {
// 该方式可以注入JmsTemplate,JmsMessagingTemplate对JmsTemplate进行了封装
@Autowired
private JmsMessagingTemplate jmsTemplate;
// 发送消息,destination是发送到的队列,message是待发送的消息
public void sendMessage(Destination destination, final String message){
jmsTemplate.convertAndSend(destination, message);
}
}
Two message consumers, the specific code is as follows:
/***************** Consumer1 ******************/
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
public class Consumer {
// 使用JmsListener配置消费者监听的队列,其中text是接收到的消息
@JmsListener(destination = "mytest.queue")
public void receiveQueue(String text) {
System.out.println("Consumer收到的报文为:"+text);
}
}
/***************** Consumer2 ******************/
import org.springframework.jms.annotation.JmsListener;
import org.springframework.stereotype.Component;
@Component
public class Consumer2 {
// 使用JmsListener配置消费者监听的队列,其中text是接收到的消息
@JmsListener(destination = "mytest.queue")
public void receiveQueue(String text) {
System.out.println("Consumer2收到的报文为:"+text);
}
}
Note that the message consumer class must be annotated with @Component or @Service. In this case, the message consumer class will be delegated to the Listener class. The principle is similar to using SessionAwareMessageListener and MessageListenerAdapter to implement message-driven POJOs.
Simply test the message situation, the specific code is as follows:
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, "my site is blog.yoodb.com");
}
}
}
The results are as follows:
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com
Consumer收到的报文为:my site is blog.yoodb.com
Consumer2收到的报文为:my site is blog.yoodb.com