springboot2.2.1整合hystrix及hystrix

参考

• spring hystrix document
• Spring Boot 2 fails starting due to Hystrix?
• hystrix wiki

springboot版本

2.2.1.RELEASE

使用hystrix

pom依赖

<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
    <version>${spring.hystrix.version}</version>
</dependency>

启用

@SpringBootApplication(scanBasePackages = {"com.loading"})
@EnableHystrix //加入此行注解
public class WifiPushServerApplication {

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

}

备注： 文档中给出的示例为加入 @EnableCircuitBreaker 注解，实际此处所使用的 @EnableHystrix 的注解中已经加入了 @EnableCircuitBreaker，具体可查看源码

使用

@HystrixCommand(fallbackMethod = "searchFallBack", commandProperties = {@HystrixProperty(name = "execution.isolation.thread.timeoutInMilliseconds", value = "3000")})
public void search(String param) {
    //do stuff that might fail
}

public void searchFallBack(String param) {
    //do other something
}

上段代码中调用search()方法失败或超过设置的3000毫秒时将会调用searchFallBack()方法。具体详细属性查看hystrix wiki

使用hystrix dashboard

pom依赖

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
    <version>${spring.hystrix.version}</version>
</dependency>

启用

@SpringBootApplication(scanBasePackages = {"com.loading"})
@EnableHystrix 
@EnableHystrixDashboard //加入此行注解
public class WifiPushServerApplication {

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

}

配置

加入配置

management.endpoints.web.exposure.include: hystrix.stream

启动

启动时在控制台会看到类似信息

2019-12-25 15:06:45.771  INFO 7743 --- [           main] o.s.b.a.e.web.ServletEndpointRegistrar   : Registered '/actuator/hystrix.stream' to hystrix.stream-actuator-endpoint

console.png

并且访问网址host:port/hystrix将会看到以下页面

hystrix-dashboard-1.png

在页面地址栏输入host:port/actuator/hystrix.stream将会进入以下页面，即表示配置成功

hystrix-dashboard-2.png