java - 如何拦截Spring Cloud Stream消息？

Question

Spring 允许拦截其许多产品的消息，例如 RestTemplate 和 SpringMVC。是否可以拦截 Spring Cloud Stream 消息？对于传入和传出消息。

Answer 1

能够使用 GlobalChannelInterceptor 注释和 ChannelInterceptor 接口(interface)拦截入站和出站 Spring Cloud Stream 消息。请参见下面的示例。

import org.springframework.integration.config.GlobalChannelInterceptor;
import org.springframework.messaging.Message;
import org.springframework.messaging.MessageChannel;
import org.springframework.messaging.support.ChannelInterceptor;
import org.springframework.stereotype.Component;

@Component
@GlobalChannelInterceptor
public class Interceptor implements ChannelInterceptor {

    private final Logger log = LoggerFactory.getLogger(Interceptor.class);

    @Override
    public Message<?> preSend(Message<?> msg, MessageChannel mc) {
        log.info("In preSend");
        return msg;
    }

    @Override
    public void postSend(Message<?> msg, MessageChannel mc, boolean bln) {
        log.info("In postSend");
    }

    @Override
    public void afterSendCompletion(Message<?> msg, MessageChannel mc, boolean bln, Exception excptn) {
        log.info("In afterSendCompletion");
    }

    @Override
    public boolean preReceive(MessageChannel mc) {
        log.info("In preReceive");
        return true;
    }

    @Override
    public Message<?> postReceive(Message<?> msg, MessageChannel mc) {
        log.info("In postReceive");
        return msg;
    }

    @Override
    public void afterReceiveCompletion(Message<?> msg, MessageChannel mc, Exception excptn) {
        log.info("In afterReceiveCompletion");
    }

}