SpringCloud——Eureka

最新推荐文章于 2024-08-17 09:03:59 发布

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最新推荐文章于 2024-08-17 09:03:59 发布

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分类专栏： SPRING

本文链接：https://blog.youkuaiyun.com/fonxian/article/details/82356722

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本文介绍如何使用Spring Cloud Finchley.M9版本搭建Eureka服务注册中心，并通过实例演示服务注册与监听功能的实现。主要内容包括：配置Maven依赖、启动类设置、配置文件说明及自定义事件监听器的实现。

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使用版本Finchley.M9，不同版本对应的组件依赖名称不同。

1、添加maven依赖


<parent>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-parent</artifactId>
        <version>2.0.1.RELEASE</version>
    </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.M9</spring-cloud.version>
    </properties>

    <dependencies>

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

    <repositories>
        <repository>
            <id>spring-milestones</id>
            <name>Spring Milestones</name>
            <url>https://repo.spring.io/milestone</url>
            <snapshots>
                <enabled>false</enabled>
            </snapshots>
        </repository>
    </repositories>

2、创建Application启动类


@EnableEurekaServer
@SpringBootApplication
public class Application {

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

}

3、添加配置项

spring.application.name=house
server.port=9294

eureka.instance.hostname=localhost
eureka.client.register-with-eureka=false
eureka.client.fetch-registry=false
eureka.client.service-url.defaultZone=http://${eureka.instance.hostname}:${server.port}/eureka

4、新增事件监听，创建监听类实现ApplicationListener接口

(1)监听注册事件

@Configuration
public class InstanceRegisterListener implements ApplicationListener<EurekaInstanceRegisteredEvent> {
    private static final Logger LOGGER = LoggerFactory.getLogger(InstanceRegisterListener.class);

    @Override
    public void onApplicationEvent(EurekaInstanceRegisteredEvent eurekaInstanceRegisteredEvent) {

        if (eurekaInstanceRegisteredEvent.getInstanceInfo().getStatus().equals(InstanceInfo.InstanceStatus.DOWN)) {
            LOGGER.error("服务：{}，挂掉了", eurekaInstanceRegisteredEvent.getInstanceInfo().getAppName());
        }else if (eurekaInstanceRegisteredEvent.getInstanceInfo().getStatus().equals(InstanceInfo.InstanceStatus.UP)) {
            LOGGER.info("服务：{}，注册成功", eurekaInstanceRegisteredEvent.getInstanceInfo().getAppName());
        } else {
            LOGGER.error("服务：{}，STATUS = {}", eurekaInstanceRegisteredEvent.getInstanceInfo().getAppName(), eurekaInstanceRegisteredEvent.getInstanceInfo().getStatus());
        }

    }
}

(2)监听心跳上报事件

@Configuration
public class InstanceRenewListener implements ApplicationListener<EurekaInstanceRenewedEvent> {
    private static final Logger LOGGER = LoggerFactory.getLogger(InstanceRenewListener.class);
    @Override
    public void onApplicationEvent(EurekaInstanceRenewedEvent event) {
        LOGGER.info("心跳检测服务：{}" ,event.getInstanceInfo().getAppName());
    }
}