6.Hystrix-超時設置

由於客戶端請求服務端方法時，服務端方法響應超過1秒將會觸發降級，所以我們可以配置Hystrix默認的超時配置

如果我們沒有配置默認的超時時間，Hystrix將取default_executionTimeoutInMilliseconds作為默認超時時間

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

1.代碼中修改默認超時配置（改為3秒）：

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

2.application.properties中設置默認超時時間：

1.默認：（方法上記得要加上@HystrixCommand，否則無效）：
hystrix.command.default.execution.isolation.thread.timeoutInMilliseconds=3000

2.配置具體方法的超時時間
hystrix.command.serverMethod.execution.isolation.thread.timeoutInMilliseconds=3000

3.啟動類：

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 //開啟斷路器
@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>