Spring Cloud Stream

支持RabbitMQ,Kaflka,简化消息中间件的使用

添加依赖

支持RabbitMQ
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-stream-rabbit</artifactId>
</dependency>
支持Kaflka
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-stream-kaflka</artifactId>
</dependency>

定义接口

/**
 * 功能描述: 定义Spring Cloud Stream接口
 */
public interface StreamClient {

    String INPUT = "myMessage";

    String INPUT2 = "myMessage2";

    @Input(StreamClient.INPUT)
    SubscribableChannel input();

    @Output(StreamClient.INPUT)
    MessageChannel output();

    @Input(StreamClient.INPUT2)
    SubscribableChannel input2();

    @Output(StreamClient.INPUT2)
    MessageChannel output2();
}

发送stream消息

@Api(tags = "发送Spring Cloud Stream信息到MQ")
@RestController
public class SendMessageController {

    @Autowired
    private StreamClient streamClient;

//    @GetMapping("/sendMessage")
//    public void process() {
//        String message = "now " + new Date();
//        streamClient.output().send(MessageBuilder.withPayload(message).build());
//    }

    /**
     * 发送 orderDTO对象
     */
    @ApiOperation("发送 orderDTO对象")
    @GetMapping("/sendMessage")
    public void process() {
        OrderDTO orderDTO = new OrderDTO();
        orderDTO.setOrderId("123456");
        streamClient.output().send(MessageBuilder.withPayload(orderDTO).build());
    }
}

接收stream消息

 * 功能描述:接收Spring Cloud Stream消息
 */
@Component
@EnableBinding(StreamClient.class)
@Slf4j
public class StreamReceiver {

//    @StreamListener(value = StreamClient.INPUT)
//    public void process(Object message) {
//        log.info("StreamReceiver: {}", message);
//    }

    /**
     * myMessage 接收orderDTO对象 消息,myMessage2发送一条返回消息
     * @param message
     */
    @StreamListener(value = StreamClient.INPUT)
    @SendTo(StreamClient.INPUT2)
    public String process(OrderDTO message) {
        log.info("StreamReceiver: {}", message);
        return "received.";
    }

    /**
     * myMessage2接收返回消息
     * @param message
     */
    @StreamListener(value = StreamClient.INPUT2)
    public void process2(String message) {
        log.info("StreamReceiver2: {}", message);
    }
}