6.Hystrix-超时设置

由于客户端请求服务端方法时，服务端方法响应超过1秒将会触发降级，所以我们可以配置Hystrix默认的超时配置

如果我们没有配置默认的超时时间，Hystrix将取default_executionTimeoutInMilliseconds作为默认超时时间

this.executionTimeoutInMilliseconds = getProperty(propertyPrefix, key, "execution.isolation.thread.timeoutInMilliseconds", builder.getExecutionIsolationThreadTimeoutInMilliseconds(), default_executionTimeoutInMilliseconds)

1.代码中修改默认超时配置（改为3秒）：

@HystrixCommand(commandProperties = {
     @HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds",value = "3000")
})
public String serverMethod() {
　　return null;
}

2.application.properties中设置默认超时时间：

1.默认：（方法上记得要加上@HystrixCommand，否则无效）：
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=3000

2.配置具体方法的超时时间
hystrix.command.serverMethod.execution.isolation.thread.timeoutInMilliseconds=3000

3.启动类：

package com.wangfajun;

import org.springframework.boot.SpringApplication;
import org.springframework.boot.autoconfigure.SpringBootApplication;
import org.springframework.cloud.client.SpringCloudApplication;
import org.springframework.cloud.client.circuitbreaker.EnableCircuitBreaker;
import org.springframework.cloud.client.discovery.EnableDiscoveryClient;

//@SpringBootApplication
//@EnableDiscoveryClient
//@EnableCircuitBreaker //开启断路器
@SpringCloudApplication
public class FajunClientTestApplication {

    public static void main(String[] args) {
        SpringApplication.run(FajunClientTestApplication.class, args);
    }
}

4.pom:

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