在项目中经常遇到一个Spring Boot工程要连接多个RabbitMQ。如果只连接一个，Spring Boot可以零配置连接RabbitMQ，这样不需要做额外的工作。但如果连接多个RabbitMQ，就得做一些配置了。
配置文件
application.properties
spring.application.name=rabbitmq-hello
# RabbitMQ
spring.rabbitmq.first.host=node9
spring.rabbitmq.first.port=5670
spring.rabbitmq.first.username=guest
spring.rabbitmq.first.password=guest
spring.rabbitmq.second.host=localhost
spring.rabbitmq.second.port=5672
spring.rabbitmq.second.username=guest
spring.rabbitmq.second.password=guest
# MySQL
spring.datasource.url = jdbc:mysql://localhost:3306/cloudtest
spring.datasource.username = root
spring.datasource.password = root
spring.datasource.driverClassName = com.mysql.jdbc.Driver
代码
程序入口
HelloApplication.java
import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
@SpringBootApplication
public class HelloApplication {
public static void main(String[] args) {
SpringApplication.run(HelloApplication.class, args);
}
}
RabbitMQ配置类
RabbitConfig.java
import org.springframework.amqp.core.Queue;
import org.springframework.amqp.rabbit.config.SimpleRabbitListenerContainerFactory;
import org.springframework.amqp.rabbit.connection.CachingConnectionFactory;
import org.springframework.amqp.rabbit.connection.ConnectionFactory;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.beans.factory.annotation.Qualifier;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.boot.autoconfigure.amqp.SimpleRabbitListenerContainerFactoryConfigurer;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.Primary;
@Configuration
public class RabbitConfig {
@Bean(name = "firstConnectionFactory")
@Primary
public ConnectionFactory firstConnectionFactory(
@Value("${spring.rabbitmq.first.host}") String host,
@Value("${spring.rabbitmq.first.port}") int port,
@Value("${spring.rabbitmq.first.username}") String username,
@Value("${spring.rabbitmq.first.password}") String password
) {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setHost(host);
connectionFactory.setPort(port);
connectionFactory.setUsername(username);
connectionFactory.setPassword(password);
return connectionFactory;
}
@Bean(name = "secondConnectionFactory")
public ConnectionFactory secondConnectionFactory(
@Value("${spring.rabbitmq.second.host}") String host,
@Value("${spring.rabbitmq.second.port}") int port,
@Value("${spring.rabbitmq.second.username}") String username,
@Value("${spring.rabbitmq.second.password}") String password
) {
CachingConnectionFactory connectionFactory = new CachingConnectionFactory();
connectionFactory.setHost(host);
connectionFactory.setPort(port);
connectionFactory.setUsername(username);
connectionFactory.setPassword(password);
return connectionFactory;
}
@Bean(name = "firstRabbitTemplate")
@Primary
public RabbitTemplate firstRabbitTemplate(
@Qualifier("firstConnectionFactory") ConnectionFactory connectionFactory
) {
RabbitTemplate firstRabbitTemplate = new RabbitTemplate(connectionFactory);
return firstRabbitTemplate;
}
@Bean(name = "secondRabbitTemplate")
public RabbitTemplate secondRabbitTemplate(
@Qualifier("secondConnectionFactory") ConnectionFactory connectionFactory
) {
RabbitTemplate secondRabbitTemplate = new RabbitTemplate(connectionFactory);
return secondRabbitTemplate;
}
@Bean(name = "firstFactory")
public SimpleRabbitListenerContainerFactory firstFactory(
SimpleRabbitListenerContainerFactoryConfigurer configurer,
@Qualifier("firstConnectionFactory") ConnectionFactory connectionFactory
) {
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
configurer.configure(factory, connectionFactory);
return factory;
}
@Bean(name = "secondFactory")
public SimpleRabbitListenerContainerFactory secondFactory(
SimpleRabbitListenerContainerFactoryConfigurer configurer,
@Qualifier("secondConnectionFactory") ConnectionFactory connectionFactory
) {
SimpleRabbitListenerContainerFactory factory = new SimpleRabbitListenerContainerFactory();
configurer.configure(factory, connectionFactory);
return factory;
}
@Bean
public Queue firstQueue() {
System.out.println("configuration firstQueue ........................");
return new Queue("hello1");
}
@Bean
public Object secondQueue() {
System.out.println("configuration secondQueue ........................");
return new Queue("hello2");
}
}
RabbitMQ中的消费者，接收first RabbitMQ中的队列hello1的数据
Receiver.java
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
@Component
@RabbitListener(queues = "hello1",Factory = "firstFactory")
public class Receiver {
@RabbitHandler
public void process(String hello) {
System.out.println("Receiver : " + hello);
}
}
RabbitMQ中的消费者，接收second RabbitMQ中的队列hello2的数据
Receiver2.java
import org.springframework.amqp.rabbit.annotation.RabbitHandler;
import org.springframework.amqp.rabbit.annotation.RabbitListener;
import org.springframework.stereotype.Component;
@Component
@RabbitListener(queues = "hello2",Factory = "secondFactory")
public class Receiver2 {
@RabbitHandler
public void process(String hello) {
System.out.println("Receiver : " + hello);
}
}
RabbitMQ中的生产者，发送消息到first RabbitMQ中的队列hello1和hello2
Sender.java
import java.util.Date;
import javax.annotation.Resource;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.stereotype.Component;
@Component
public class Sender {
@Resource(name = "firstRabbitTemplate")
private RabbitTemplate firstRabbitTemplate;
public void send1() {
String context = "hello1 " + new Date();
System.out.println("Sender : " + context);
this.firstRabbitTemplate.convertAndSend("hello1", context);
}
public void send2() {
String context = "hello2 " + new Date();
System.out.println("Sender : " + context);
this.firstRabbitTemplate.convertAndSend("hello2", context);
}
}
RabbitMQ中的生产者，发送消息到second RabbitMQ中的队列hello1和hello2
Sender2.java
import java.util.Date;
import javax.annotation.Resource;
import org.springframework.amqp.rabbit.core.RabbitTemplate;
import org.springframework.stereotype.Component;
@Component
public class Sender {
@Resource(name = "firstRabbitTemplate")
private RabbitTemplate firstRabbitTemplate;
public void send1() {
String context = "hello1 " + new Date();
System.out.println("Sender : " + context);
this.firstRabbitTemplate.convertAndSend("hello1", context);
}
public void send2() {
String context = "hello2 " + new Date();
System.out.println("Sender : " + context);
this.firstRabbitTemplate.convertAndSend("hello2", context);
}
}
测试类，调用Sender发送消息
TestDemo01.java
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.test.SpringApplicationConfiguration;
import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
@RunWith(SpringJUnit4ClassRunner.class)
@SpringApplicationConfiguration(classes = HelloApplication.class)
public class TestDemo01 {
@Autowired
private Sender sender;
@Autowired
private Sender2 sender2;
@Test
public void hello() throws Exception {
sender.send1();
sender.send2();
}
@Test
public void hello2() throws Exception {
sender2.send1();
sender2.send2();
}
}
运行&测试
通过运行HelloApplication.Java，将程序中的Receiver启动一直监控着队列，然后通过运行TestDemo01.java中的测试案例，发送消息到队列中，这时可以发现运行HelloApplication的程序控制台将刚刚发送的消息打印出来。
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