spring-cloud 与ribbon/eureka/hystrix 使用restTemplate 无法设置连接/读取超时

Question

我已经使用 spring-cloud 构建了一个 Spring Boot 应用程序，并希望在我的客户端应用程序（这也是一个微服务）中使用 RestTemplate，以便我可以继续使用 mockMvc 进行集成测试。我正在使用默认的ribbon/eureka/hystrix 客户端设置和我正在调用的服务中的客户端微服务和eureka 客户端。这是有效的（一旦我发现 serviceIds 是在 restTemplate 中标识服务端点的东西）。我的问题是我似乎无法从默认的 300 毫秒更改 restTemplate 读取或连接超时。

通话详情：

`@Configuration
 @EnableAutoConfiguration
 @ComponentScan
 @EnableConfigurationProperties
 @EnableHystrix
 @EnableEurekaClient
public class Application { ... public static void main(String[] args) {} ... }

@Component
class EricComponentToDoHystrix {   // apparently this has to be a component for hystrix to work btw
    @Autowired
    RestTemplate restTemplate;
    ..
    @HystrixCommand(fallbackMethod="defaultRestTemplateCall")
    public void doRestTemplateCall() 
        ResponseEntity<String> result = restTemplate.getForEntity("http://someservice/doSomething", String.class);  // actually make a call
    ..
    }
}`

application.properties 包含：

spring:
  cloud:
    client:
      serviceIds:
        - someservice

someservice:
  ribbon:
    #listOfServers: localhost:7080
    #NIWSServerListClassName: com.netflix.niws.loadbalancer.DiscoveryEnabledNIWSServerList

    # the eureka vipAddress of the target service (Disabled)
    DeploymentContextBasedVipAddresses: someservice

    # Interval to refresh the server list from the source
    ServerListRefreshInterval: 1000

    # Connect timeout used by Apache HttpClient.. apparently not by restTemplate 
    ConnectTimeout: 30000

    # Read timeout used by Apache HttpClient.. apparently not by restTemplate
    ReadTimeout: 30000

eureka:
  client:
    #Region where eureka is deployed -For AWS specify one of the AWS regions, for other datacenters specify a arbitrary string
    #indicating the region.This is normally specified as a -D option (eg) -Deureka.region=us-east-1
    region: default

    #For eureka clients running in eureka server, it needs to connect to servers in other zones
    preferSameZone: false

    us-east-1:
      availabilityZones: default

  instance:
    #Virtual host name by which the clients identifies this service
    virtualHostName: ${spring.application.name}
    appGroupName: ericGroup


# disable Ribbon's cicruit breaker and rely soley on Hystrix.
# this helps to avoid confusion.
# see https://github.com/Netflix/ribbon/issues/15
niws:
  loadbalancer:
    availabilityFilteringRule:
      filterCircuitTripped: false

有人知道我需要什么属性来修改restTemplate的默认超时吗？文档在这个主题上非常简单，似乎最近的代码甚至允许将 restTemplate 用于功能区/尤里卡弹簧启动默认值。也许这还没有建成。

Answer 1

您注入的RestTemplate 完全是普通的，除了RibbonInterceptor 为您选择URI 中的物理主机（请参阅https://github.com/spring-cloud/spring-cloud-netflix/blob/master/spring-cloud-netflix-core/src/main/java/org/springframework/cloud/netflix/ribbon/RibbonAutoConfiguration.java）。通过ClientHttpRequest 在RestTemplate 中控制超时和其他属性。您可能应该将RibbonInterceptor 注入您自己的RestTemplate 并设置ClientHttpRequestFactory 来执行超时，例如

@Component
class EricComponentToDoHystrix {
    private RestTemplate restTemplate;
    @Autowired
    public EricComponentToDoHystrix(RibbonInterceptor interceptor) {
         restTemplate = new RestTemplate();
         restTemplate.setInterceptors(Arrays.asList(interceptor));
         restTemplate.setRequestFactory(...);
    }
}

Answer 2

由于无法发表评论，我会回答。 RestTemplate 集成仅使用 Ribbon LoadBalancer，而不是 RestClient 或 NFHttpClient。

您不再需要 spring.cloud.client.serviceIds，顺便说一句。如果它在文档中，我会删除它。