第二篇：服务提供者 (eureka client)

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本文出自Owater的博客

服务提供者 (eureka client)

创建Module，命名为service-a
pom.xml如下：

<?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.owater</groupId>
    <artifactId>service-a</artifactId>
    <version>0.0.1-SNAPSHOT</version>
    <packaging>jar</packaging>

    <name>service-a</name>
    <description>Demo project for Spring Boot</description>

    <parent>
        <artifactId>docker-springcloud-parent</artifactId>
        <groupId>com.owater</groupId>
        <version>0.0.1</version>
    </parent>

    <dependencies>
        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.cloud</groupId>
            <artifactId>spring-cloud-starter-eureka-server</artifactId>
        </dependency>

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-actuator</artifactId>
        </dependency>

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

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

        <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-test</artifactId>
            <scope>test</scope>
        </dependency>

        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger2</artifactId>
        </dependency>
        <dependency>
            <groupId>io.springfox</groupId>
            <artifactId>springfox-swagger-ui</artifactId>
        </dependency>
    </dependencies>

    <build>
        <plugins>
            <plugin>
                <groupId>com.spotify</groupId>
                <artifactId>docker-maven-plugin</artifactId>
                <configuration>
                    <imageName>${project.name}:${project.version}</imageName>
                    <dockerDirectory>${project.basedir}/src/main/docker</dockerDirectory>
                    <resources>
                        <resource>
                            <targetPath>/</targetPath>
                            <directory>${project.build.directory}</directory>
                            <include>${project.build.finalName}.jar</include>
                        </resource>
                    </resources>
                </configuration>
            </plugin>
        </plugins>
    </build>
</project>

Application添加@EnableEurekaClient 启用eureka client

@SpringBootApplication
@EnableEurekaClient
public class ServiceAApplication {

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

application.yml文件还需要配置eureka注册地址，配置如下：

server:
  port: 8080

spring:
  application:
    name: service-a

eureka:
  instance:
    hostname: localhost
  client:
    registerWithEureka: true
    fetchRegistry: true
    serviceUrl:
      defaultZone: http://${eureka.instance.hostname}:7000/eureka/

这里的spring.application.name是当前该服务的名称，各个服务之间的访问通信是通过这个name，而并非是IP地址

添加个controller

@RestController
public class HomeController {

    @Value("${server.port}")
    String port;

    @GetMapping("hi")
    public String index(@RequestParam String name) {
        return "hi "+name+", port:" +port;
    }

    public String hiError(String name) {
        return "hi,"+name+",error lalalala!";
    }
}

Eureka注册

通过访问http://localhost:8080/hi?name=Owater

访问结果

源码参考：https://github.com/Owater/docker_springcloud/tree/master/service-a
Spring Cloud Eureka 官方文档

转载请标明出处： http://www.jianshu.com/p/4fe0c858b913
本文出自Owater的博客