How Springboot integrates RabbitMQ message queue
Producer project
POM dependency
You can choose to add dependencies directly when creating the project.
RabbitMQ configuration file:
When using related switches and queues, we need The implementation declares switches and queues. If there is no corresponding information, the startup project will fail. Therefore, when using springboot to integrate rabbitmq, we can use the configuration file to declare the switch and queue and bind the relationship between the two. Since Fanout mode is currently being demonstrated, FanoutExchange is used to declare the switch, and other modes use the corresponding TopicExchange and DirectExchange to declare.@Configuration public class RabbitMQConfiguration { //声明fanout模式的交换机 @Bean public FanoutExchange fanoutExchange() { return new FanoutExchange("fanout_order_exchange", true, false); } //声明队列 @Bean public Queue smsQueue() { return new Queue("sms.fanout.queue", true); } @Bean public Queue emailQueue() { return new Queue("email.fanout.queue", true); } @Bean public Queue duanxinQueue() { return new Queue("duanxin.fanout.queue", true); } //绑定 @Bean public Binding smsBinding() { return BindingBuilder.bind(smsQueue()).to(fanoutExchange()); } @Bean public Binding emailBinding() { return BindingBuilder.bind(emailQueue()).to(fanoutExchange()); } @Bean public Binding duanxinBinding() { return BindingBuilder.bind(duanxinQueue()).to(fanoutExchange()); } }
@Autowired private RabbitTemplate rabbitTemplate; public void makeOrder() { // 保存订单 String orderId = UUID.randomUUID().toString(); System.out.println("下单成功:" + orderId); // 通过MQ完成消息的分发 // 参数1:交换机 ;参数2:路由key/队列名;参数3:消息内容 String exchangeName = "fanout_order_exchange"; rabbitTemplate.convertAndSend(exchangeName, "", orderId); } }
Consumer:
Consumer engineering is similar to producer engineering. We first need to introduce dependencies, and then make related changes in the application file configuration to start writing code. In the consumer project, we can also write rabbitmq configuration files to declare switches and queues. It is recommended to write the configuration file on the consumer side, because the consumer side is the first project to start. If the switch and queue are not created, the project startup will fail. Message listeningWe listen to the message queue through the RabbitListener annotation. It should be noted that we need to hand over the monitoring to spring management through Component annotation, otherwise we cannot receive messages from the server normally. Only one email message monitoring is given here. The duanxin and SMS queues declared by the producer above can be created by themselves. You only need to modify the queue name. @Service public class OrderService {@RabbitListener(queues = {"email.fanout.queue"}) @Component public class FanoutEmailService { @RabbitHandler public void receive(String message) { System.out.println("email fanout -----》接收到" + message); } }
@SpringBootTest class SpringbootOrderRabbitmqProducerApplicationTests { @Autowired private OrderService orderService; @Test void contextLoads() { orderService.makeOrder(); } }
@Configuration public class DirectRabbitMQConfiguration { //声明direct模式的交换机 @Bean public DirectExchange directExchange() { return new DirectExchange("direct_order_exchange", true, false); } //声明队列 @Bean public Queue smsDirectQueue() { return new Queue("sms.direct.queue", true); } @Bean public Queue emailDirectQueue() { return new Queue("email.direct.queue", true); } @Bean public Queue duanxinDirectQueue() { return new Queue("duanxin.direct.queue", true); } //绑定 @Bean public Binding smsDirectBinding() { return BindingBuilder.bind(smsDirectQueue()).to(directExchange()).with("sms"); } @Bean public Binding emailDirectBinding() { return BindingBuilder.bind(emailDirectQueue()).to(directExchange()).with("email"); } @Bean public Binding duanxinDirectBinding() { return BindingBuilder.bind(duanxinDirectQueue()).to(directExchange()).with("duanxin"); } }
@Service
public class OrderService {
@Autowired
private RabbitTemplate rabbitTemplate;
public void makeOrderDirect() {
// 保存订单
String orderId = UUID.randomUUID().toString();
System.out.println("下单成功:" + orderId);
String exchangeName = "direct_order_exchange";
rabbitTemplate.convertAndSend(exchangeName, "sms", orderId);
rabbitTemplate.convertAndSend(exchangeName, "email", orderId);
}
}
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ConsumerMessage monitoring is the same as above, just pay attention to the queue name. @Service public class OrderService { @Autowired private RabbitTemplate rabbitTemplate; public void makeOrderDirect() { // 保存订单 String orderId = UUID.randomUUID().toString(); System.out.println("下单成功:" + orderId); String exchangeName = "direct_order_exchange"; rabbitTemplate.convertAndSend(exchangeName, "sms", orderId); rabbitTemplate.convertAndSend(exchangeName, "email", orderId); } }
@RabbitListener(queues = {"email.direct.queue"}) @Component public class DirectEmailService { @RabbitHandler public void receive(String message) { System.out.println("email direct -----》接收到" + message); } }
@Service public class OrderService { @Autowired private RabbitTemplate rabbitTemplate; public void makeOrderTopic() { // 保存订单 String orderId = UUID.randomUUID().toString(); System.out.println("下单成功:" + orderId); String exchangeName = "topic_order_exchange"; String routingKey = "com.email"; rabbitTemplate.convertAndSend(exchangeName, routingKey, orderId); } }
@RabbitListener(bindings = @QueueBinding( value = @Queue(value = "email.topic.queue",durable = "true",autoDelete = "false"), exchange = @Exchange(value = "topic_order_exchange",type = ExchangeTypes.TOPIC), key = "*.email.#" )) @Component public class TopicEmailService { @RabbitHandler public void receive(String message) { System.out.println("email topic -----》接收到" + message); } }
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