Spring Cloud Hystrix使用

Spring Cloud Hystrix：断路器与命令处理实战

最新推荐文章于 2025-03-28 14:58:08 发布

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最新推荐文章于 2025-03-28 14:58:08 发布 · 252 阅读

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#hystrix使用 #hystrix实战 #netflix hystrix

@EnableCircuitBreaker注解

使用@EnableCircuitBreaker注解开启断路器功能,另外@SpringCloudApplication注解也包含@EnableCircuitBreaker注解，以下为@SpringCloudApplication注解的源码

@Target(ElementType.TYPE)
@Retention(RetentionPolicy.RUNTIME)
@Documented
@Inherited
@SpringBootApplication
@EnableDiscoveryClient
@EnableCircuitBreaker
public @interface SpringCloudApplication {

}

引入Spring Cloud Hystrix

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

方法一：实现HystrixCommand

public class HelloHystrix extends HystrixCommand{
    @Autowired
    RestTemplate restTemplate;

    protected HelloHystrix(String threadKeyName, int timeout, int queueSize, int coreSize) {
        super(Setter.withGroupKey(
                //设置命令组
                HystrixCommandGroupKey.Factory.asKey("springHealthGrooup"))
                //设置命令键
                .andCommandKey(HystrixCommandKey.Factory.asKey("interventionKey"))
                //设置线程池键
                .andThreadPoolKey(HystrixThreadPoolKey.Factory.asKey(threadKeyName))
                //设置命令属性
                .andCommandPropertiesDefaults(
                        HystrixCommandProperties.Setter()
                        .withExecutionTimeoutInMilliseconds(timeout)
                )
                .andThreadPoolPropertiesDefaults(
                        HystrixThreadPoolProperties.Setter()