在发布此问题之前，我经历了诸如Unable to connect to Command Metric Stream for Hystrix Dashboard with Spring Cloud和Unable to connect to Command Metric Stream in Spring Cloud + Hystrix + Turbine - MIME type ("text/plain") that is not "text/event-stream"之类的大量链接，等等，但仍然对我不起作用。
我正在使用Spring Boot V2.2.2.RELEASE。
2020-01-14 22:52:23.805 INFO 8436 --- [io-8080-exec-10] ashboardConfiguration$ProxyStreamServlet :
Proxy opening connection to: http://localhost:8000/hystrix.stream
2020-01-14 22:52:23.806 INFO 8436 --- [nio-8080-exec-2] ashboardConfiguration$ProxyStreamServlet :
Proxy opening connection to: http://localhost:8000/hystrix.stream
2020-01-14 22:52:24.442 WARN 8436 --- [io-8080-exec-10] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8000/hystrix.stream : 404 : HTTP/1.1 404
2020-01-14 22:52:24.442 WARN 8436 --- [nio-8080-exec-2] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8000/hystrix.stream : 404 : HTTP/1.1 404
2020-01-14 22:52:37.391 INFO 8436 --- [nio-8080-exec-8] ashboardConfiguration$ProxyStreamServlet :
Proxy opening connection to: http://localhost:8080/hystrix.stream
2020-01-14 22:52:37.397 INFO 8436 --- [nio-8080-exec-9] ashboardConfiguration$ProxyStreamServlet :
Proxy opening connection to: http://localhost:8080/hystrix.stream
2020-01-14 22:52:37.488 WARN 8436 --- [nio-8080-exec-8] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8080/hystrix.stream : 404 : HTTP/1.1 404
2020-01-14 22:52:37.488 WARN 8436 --- [nio-8080-exec-9] ashboardConfiguration$ProxyStreamServlet : Failed opening connection to http://localhost:8080/hystrix.stream : 404 : HTTP/1.1 404
HystrixDashboardApplication.java
@SpringBootApplication
@EnableHystrixDashboard
public class HystrixDashboardApplication {
public static void main(String[] args) {
SpringApplication.run(HystrixDashboardApplication.class,args);
}
}
bootstrap.properties
management.endpoints.web.exposure.include=hystrix.stream
management.endpoints.web.base-path=/
eureka.client.serviceUrl.defaultZone=http://localhost:8761/eureka
pom.xml
<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-parent</artifactId>
<version>2.2.2.RELEASE</version>
<relativePath/> <!-- lookup parent from repository -->
</parent>
<groupId>com.example</groupId>
<artifactId>spring-boot-jdbcBatchUpdate</artifactId>
<version>0.0.1-snAPSHOT</version>
<name>hystrix-dashboard</name>
<description>Demo project for Spring Boot</description>
<properties>
<java.version>1.8</java.version>
<spring-cloud.version>Hoxton.SR1</spring-cloud.version>
<maven-jar-plugin.version>3.1.1</maven-jar-plugin.version>
</properties>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-starter-netflix-hystrix-dashboard</artifactId>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-test</artifactId>
<scope>test</scope>
<exclusions>
<exclusion>
<groupId>org.junit.vintage</groupId>
<artifactId>junit-vintage-engine</artifactId>
</exclusion>
</exclusions>
</dependency>
<dependency>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-starter-actuator</artifactId>
</dependency>
</dependencies>
<dependencyManagement>
<dependencies>
<dependency>
<groupId>org.springframework.cloud</groupId>
<artifactId>spring-cloud-dependencies</artifactId>
<version>${spring-cloud.version}</version>
<type>pom</type>
<scope>import</scope>
</dependency>
</dependencies>
</dependencyManagement>
<build>
<plugins>
<plugin>
<groupId>org.springframework.boot</groupId>
<artifactId>spring-boot-maven-plugin</artifactId>
</plugin>
</plugins>
</build>
</project>
天气应用：：
WeatherService.java
@Service
public class WeatherService {
@Inject
private RestTemplate restTemplate;
@HystrixCommand(fallbackMethod="unknown")
public String getWeather() {
return restTemplate.getForEntity("http://weather-service/weather",String.class).getBody();
}
public String unknown() {
System.out.println("~~~~~~~~~");
return "unknown";
}
}
WeatherAppApplication.java
@EnableDiscoveryClient
@EnableCircuitBreaker
@RestController
@SpringBootApplication
public class WeatherAppApplication {
@Inject
private WeatherService weatherService;
public static void main(String[] args) {
SpringApplication.run(WeatherAppApplication.class,args);
}
@Bean
@LoadBalanced
public RestTemplate restTemplate() {
return new RestTemplate();
}
@GetMapping(value = "/current/weather")
public String getWeather() {
return "The current weather is " + weatherService.getWeather();
}
}
application.properties
server.port=8000
spring.application.name=weather-app
eureka.client.service-url.defaultZone=http://localhost:8761/eureka
天气服务：：
application.properties
server.port=9000
spring.application.name=weather-service
eureka.client.service-url.defaultZone=http://localhost:8761/eureka
WeatherServiceApplication.java
@RestController
@EnableDiscoveryClient
@SpringBootApplication
public class WeatherServiceApplication {
private String[] weather = new String[] {"sunny","cloudy","rainy","windy"};
public static void main(String[] args) {
SpringApplication.run(WeatherServiceApplication.class,args);
}
@GetMapping(value="/weather")
public String getWeather() {
int rand = ThreadLocalRandom.current().nextInt(0,4);
return weather[rand];
}
}
