Hystrix 服务降级一(服务端降级)

pom

        <!-- hystrix-->
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>

1：单个方法降级

    @HystrixCommand(fallbackMethod = "paymenInfo_TimeOutHandler", commandProperties = {
            @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")
    })
    //  @HystrixCommand //没有特别指明，则用统一配置
    public String paymentInfo_TimeOut() {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：  " + Thread.currentThread().getName() + " paymentInfo_TimeOut";
    }

 降级的方法

    /**
     * 单个服务降级
     *
     * @return
     */
    public String paymenInfo_TimeOutHandler() {
        return "线程池：  " + Thread.currentThread().getName() + " paymenInfo_TimeOutHandler";
    }

2：全局服务降级

@Service
@DefaultProperties(defaultFallback = "paymenInfo_GloableHandler")
public class PaymentService {

    @HystrixCommand //没有特别指明，则用统一配置
    public String paymentInfo_TimeOut() {
        try {
            Thread.sleep(5000);
        } catch (InterruptedException e) {
            e.printStackTrace();
        }
        return "线程池：  " + Thread.currentThread().getName() + " paymentInfo_TimeOut";
    }

　 降级的方法

    /**
     * 全局服务降级
     *
     * @return
     */
    public String paymenInfo_GloableHandler() {
        return "线程池：  " + Thread.currentThread().getName() + " paymenInfo_GloableHandler";
    }

　备注：服务降级一般用在客户端