Spring Cloud Stream监控
Spring Boot Actuator组件用于暴露监控端点，很多监控工具都需要依赖该组件的监控端点实现监控。而项目集成了Stream及Actuator后也会暴露相应的监控端点.
首先需要在项目里集成Actuator，添加依赖如下：
org.springframework.boot
spring-boot-starter-actuator
添加配置,暴露所有监控端点,并显示健康检测详情
management:
endpoint:
health:
# 显示健康检测详情
show-details: always
endpoints:
web:
exposure:
# 暴露所有监控端点
include: '*'访问http://localhost:端口号/actuator可以获取所有暴露出来的监控端点，Stream的相关监控端点也在其中
/actuator/bindings端点可以用于查看bindings相关信息：
/actuator/channels端点用于查看channels的相关信息，“input”和“output”就是channel，可以认为这些channel是topic的抽象：
/actuator/health端点中可以查看binder及RocketMQ的状态，主要是用于查看MQ的连接情况，如果连接不上其status则为DOWN：
Spring Cloud Stream异常处理
局部处理
配置文件
spring:
cloud:
stream:
bindings:
input:
destination: test-destination
group: test-group
output:
destination: test-destination代码实现
@Slf4j
@SpringBootApplication
@EnableBinding({Processor.class})
@EnableScheduling
public class Study01Application {
public static void main(String[] args) {
SpringApplication.run(Study01Application.class, args);
}
@StreamListener(value = Processor.INPUT)
public void handle(String body) {
throw new RuntimeException("运行时错误");
}
@ServiceActivator(inputChannel = "test-destination.test-group.errors")
public void handleError(ErrorMessage message) {
Throwable throwable = message.getPayload();
log.error("截获异常", throwable);
Message originalMessage = message.getOriginalMessage();
assert originalMessage != null;
log.info("原始消息体 = {}", new String((byte[]) originalMessage.getPayload()));
}
@Bean
@InboundChannelAdapter(value = Processor.OUTPUT, poller = @Poller(fixedDelay = "1000", maxMessagesPerPoll = "1"))
public MessageSource test() {
return () -> new GenericMessage<>("qwer");
}
} 全局处理
代码实现
@StreamListener(value = Processor.INPUT)
public void handle(String body) {
throw new RuntimeException("运行时错误");
}
@StreamListener("errorChannel")
public void error(Message message) {
ErrorMessage errorMessage = (ErrorMessage) message;
log.warn("Handling ERROR = {} " + errorMessage);
}