如何在Spring Boot 2.0中启用“hystrix.stream”？

Question

我似乎无法找到如何在Spring Boot 2.0中启用hystrix.stream。当我尝试通过访问http://localhost:8080/hystrix.stream访问该文件时，我得到404文件未找到错误。

控制器中调用的方法：

@GetMapping("/")
public Mono<String> index(Model model) {
    model.addAttribute("images",
            imageService
                    .findAllImages()
                    .map(image -> new HashMap<String, Object>() {{
                        put("id", image.getId());
                        put("name", image.getName());
                        put("imageComments", commentHelper.getComments(image));
                }})
    );
    return Mono.just("index");
}

CommentHelper代码，请注意正在使用@HystrixCommand：

@Component
public class CommentHelper {
    private final RestTemplate restTemplate;

    CommentHelper(RestTemplate restTemplate) {
        this.restTemplate = restTemplate;
    }

    @HystrixCommand(fallbackMethod = "defaultComments")
    public List<Comment> getComments(Image image) {
        return restTemplate.exchange(
                "http://COMMENTS/comments/{imageId}",
                HttpMethod.GET,
                null,
                new ParameterizedTypeReference<List<Comment>>() {},
                image.getId()).getBody();

    }

    public List<Comment> defaultComments(Image image) {
        return Collections.emptyList();
    }
}

---

这些是build.gradle的依赖项：

dependencies {
    compile 'org.springframework.boot:spring-boot-starter-webflux'
    compile 'org.synchronoss.cloud:nio-multipart-parser'
    compile 'org.springframework.boot:spring-boot-starter-data-mongodb-reactive'
    compile 'org.springframework.boot:spring-boot-starter-thymeleaf'
    compile 'org.springframework.boot:spring-boot-starter-actuator'
    compile 'org.springframework.boot:spring-boot-devtools'

    compile 'org.springframework.cloud:spring-cloud-starter-stream-rabbit'
    compile 'org.springframework.cloud:spring-cloud-stream-reactive'

    compile 'org.springframework.cloud:spring-cloud-starter-netflix-eureka-client'
    compile 'org.springframework.cloud:spring-cloud-starter-netflix-hystrix'

    testCompile 'org.springframework.boot:spring-boot-starter-test'
    testCompile 'io.projectreactor:reactor-test'

    compile 'junit:junit:4.12'
}

当我去http://localhost:8080/application/features时，您可以看到Hystrix已启用，如下所示：

{
    "enabled": [
        {
            "type": "com.netflix.hystrix.contrib.javanica.aop.aspectj.HystrixCommandAspect",
            "name": "Hystrix",
            "version": "1.5.12",
            "vendor": null
        },
        {
            "type": "com.netflix.discovery.EurekaClient",
            "name": "Eureka Client",
            "version": "1.8.4",
            "vendor": null
        },
        {
            "type": "org.springframework.cloud.client.discovery.composite.CompositeDiscoveryClient",
            "name": "DiscoveryClient",
            "version": "2.0.0.M3",
            "vendor": "Pivotal Software, Inc."
        },
        {
            "type": "org.springframework.cloud.netflix.ribbon.RibbonLoadBalancerClient",
            "name": "LoadBalancerClient",
            "version": "2.0.0.M3",
            "vendor": "Pivotal Software, Inc."
        },
        {
            "type": "com.netflix.ribbon.Ribbon",
            "name": "Ribbon",
            "version": "2.2.2",
            "vendor": null
        }
    ],
    "disabled": []
}

这到底出了什么问题？如果它有帮助，我试着按照这里找到的代码

https://github.com/learning-spring-boot/learning-spring-boot-2nd-edition-code/tree/master/7/part2

在我学习Spring Boot第二版的时候，我正在努力工作。

Answer 1

您需要根据management.endpoints.web.exposure.include=*在application.properties中包含this issue

Answer 2

您需要在application.properties中添加management.endpoints.web.base-path=/。例如，check this out。

路径必须为空，因此它正确注册为/actuator/hystrix.stream。

Answer 3

• 使用@EnableCircuitBreaker添加@EnableHystrix或@EnableHystrixDashboard注释。
• 在application.properties中添加management.endpoints.web.exposure.include=*。
• 可以在http://localhost:8080/hystrix访问Hystrix仪表板。
• 在Hystrix流URL输入中输入http://localhost:8080/actuator/hystrix.stream。