spring cloud 将一个普通的springcloud项目 非feign或ribbon项目，改造成turbine可聚合监听的项目

Posted 2021-01-10 冬天不眠

改造之前一个项目 service-a

1 pom.xml添加如下

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

完整的pom

<?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 http://maven.apache.org/xsd/maven-4.0.0.xsd">
    <modelVersion>4.0.0</modelVersion>

    <groupId>com.example</groupId>
    <artifactId>Spring-Cloud-Service-A</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>Spring-Cloud-Service-A</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.5.RELEASE</version>
        <relativePath/> <!-- lookup parent from repository -->
    </parent>

    <properties>
        <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
        <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
        <java.version>1.8</java.version>
        <spring-cloud.version>Finchley.SR1</spring-cloud.version>
    </properties>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-web</artifactId>
        </dependency>
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>
        
        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-netflix-hystrix</artifactId>
        </dependency>
        <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-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>

 

2 启动类添加注解 @EnableHystrix

@SpringBootApplication
@EnableDiscoveryClient
@EnableHystrix
public class SpringCloudServiceAApplication {

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

3 配置文件添加如下配置

server.port=8082
spring.application.name=service-a
eureka.client.service-url.defaultZone=http://localhost:8080/eureka/

eureka.instance.metadata-map.cluster=main

management.server.port=9003
management.endpoints.web.exposure.include="*"
management.endpoints.web.cors.allowed-origins="*"
management.endpoints.web.cors.allowed-methods="*"

4 编写一个测试类  添加需要熔断的方法

@RestController
public class HystrixTestC {
@GetMapping("/hget")
@HystrixCommand(fallbackMethod="getFallback")
public String getHystrixTest(String message) {
if("error".equals(message)) {
System.err.println(1/0);
}
return "hello world:"+message;
}
public String getFallback(String message) { // 此时方法的参数 与get()一致
return "hello world 1/0:"+message;
}
}

5 启动项目

6 修改turbine项目中配置文件  加入service-a

server.port=7032
spring.application.name=turbine

eureka.client.service-url.defaultZone=http://127.0.0.1:8080/eureka/

turbine.app-config=feign-consumer,service-a
# dan ge setting
#turbine.cluster-name-expression=new String("default")
#turbine.combine-host-port=true

#ji qun setting 
turbine.aggregator.clusterConfig=MAIN
turbine.cluster-name-expression=metadata[\'cluster\']

 

7 重启turbine项目

8 访问 

 

 

 

 

 服务顺利出现在turbine监控面板上