eureka案例demo演示

xjs-study/pom.xml

@@ -15,6 +15,7 @@
         <module>netty-project</module>
         <module>dubbo-project</module>
         <module>java-spi</module>
+        <module>springcloud-project</module>
     </modules>
 
     <artifactId>xjs-study</artifactId>

xjs-study/springcloud-project/eureka/eureka-client-consumer/pom.xml

@@ -0,0 +1,32 @@
+<?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">
+    <parent>
+        <artifactId>eureka</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <name>Eureka客户端消费者</name>
+
+    <artifactId>eureka-client-consumer</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

xjs-study/springcloud-project/eureka/eureka-client-consumer/src/main/java/com/xjs/EurekaClientConsumerApp.java

@@ -0,0 +1,30 @@
+package com.xjs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+import org.springframework.context.annotation.Bean;
+import org.springframework.web.client.RestTemplate;
+
+/**
+ * Eureka客户端启动器
+ * @author xiejs
+ * @since 2022-05-24
+ */
+@SpringBootApplication
+//@EnableEurekaClient     //开启Eureka client
+@EnableDiscoveryClient  //开启注册中心客户端
+//从springCloud的Edgware版本开始，不加[@EnableDiscoveryClient]注解也行，建议加上
+public class EurekaClientConsumerApp {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaClientConsumerApp.class, args);
+    }
+
+
+    @Bean
+    public RestTemplate restTemplate() {
+        return new RestTemplate();
+    }
+
+}

xjs-study/springcloud-project/eureka/eureka-client-consumer/src/main/java/com/xjs/controller/TimeController.java

@@ -0,0 +1,47 @@
+package com.xjs.controller;
+
+import org.springframework.beans.factory.annotation.Autowired;
+import org.springframework.cloud.client.ServiceInstance;
+import org.springframework.cloud.client.discovery.DiscoveryClient;
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+import org.springframework.web.client.RestTemplate;
+
+import java.util.List;
+import java.util.Map;
+
+/**
+ * @author xiejs
+ * @since 2022-05-25
+ */
+@RestController
+@RequestMapping("time")
+public class TimeController {
+
+    @Autowired
+    private DiscoveryClient discoveryClient;
+    @Autowired
+    private RestTemplate restTemplate;
+
+    @GetMapping
+    public String getTime() {
+
+        List<ServiceInstance> instances = discoveryClient.getInstances("EUREKA-CLIENT-PROVIDER");
+
+        ServiceInstance serviceInstance = instances.get(0);
+
+        String host = serviceInstance.getHost();
+        int port = serviceInstance.getPort();
+
+        //获取生产者定义的元数据
+        Map<String, String> metadata = serviceInstance.getMetadata();
+        String now = metadata.get("now");
+        System.out.println(now);
+
+        String url = "http://" + host + ":" + port + "/time";
+
+        return restTemplate.getForObject(url, String.class);
+
+    }
+}

xjs-study/springcloud-project/eureka/eureka-client-consumer/src/main/resources/application.yml

@@ -0,0 +1,19 @@
+#eureka server端口
+server:
+  port: 8759
+
+spring:
+  application:
+    name: eureka-client-consumer   #应用名称，在Eureka中作为服务名称
+
+
+#注册到Eureka服务中心
+eureka:
+  client:
+    service-url:
+      # 注册到集群，就把多个Eureka Server 地址使用逗号连接起来即可，注册到单实例，就写一个
+      defaultZone: http://localhost:8761/eureka,http://localhost:8762/eureka,http://localhost:8763/eureka
+
+  instance:
+    prefer-ip-address: true   #服务实例中显示ip，而不是显示主机名
+    instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}   #实例名称

xjs-study/springcloud-project/eureka/eureka-client-provider/pom.xml

@@ -0,0 +1,32 @@
+<?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">
+    <parent>
+        <artifactId>eureka</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <name>Eureka客户端生产者</name>
+
+    <artifactId>eureka-client-provider</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
+        </dependency>
+
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-web</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

xjs-study/springcloud-project/eureka/eureka-client-provider/src/main/java/com/xjs/EurekaClientProviderApp.java

@@ -0,0 +1,22 @@
+package com.xjs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+
+/**
+ * Eureka客户端启动器
+ * @author xiejs
+ * @since 2022-05-24
+ */
+@SpringBootApplication
+//@EnableEurekaClient     //开启Eureka client
+@EnableDiscoveryClient  //开启注册中心客户端
+//从springCloud的Edgware版本开始，不加[@EnableDiscoveryClient]注解也行，建议加上
+public class EurekaClientProviderApp {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaClientProviderApp.class, args);
+    }
+
+}

xjs-study/springcloud-project/eureka/eureka-client-provider/src/main/java/com/xjs/controller/TimeController.java

@@ -0,0 +1,20 @@
+package com.xjs.controller;
+
+import org.springframework.web.bind.annotation.GetMapping;
+import org.springframework.web.bind.annotation.RequestMapping;
+import org.springframework.web.bind.annotation.RestController;
+
+/**
+ * @author xiejs
+ * @since 2022-05-25
+ */
+@RestController
+@RequestMapping("time")
+public class TimeController {
+
+    @GetMapping
+    public String getTime() {
+        return "2022-05-25 09:41:34";
+    }
+
+}

xjs-study/springcloud-project/eureka/eureka-client-provider/src/main/resources/application.yml

@@ -0,0 +1,23 @@
+#eureka server端口
+server:
+  port: 8760
+
+spring:
+  application:
+    name: eureka-client-provider   #应用名称，在Eureka中作为服务名称
+
+
+#注册到Eureka服务中心
+eureka:
+  client:
+    service-url:
+      # 注册到集群，就把多个Eureka Server 地址使用逗号连接起来即可，注册到单实例，就写一个
+      defaultZone: http://localhost:8761/eureka,http://localhost:8762/eureka,http://localhost:8763/eureka
+
+  instance:
+    prefer-ip-address: true   #服务实例中显示ip，而不是显示主机名
+    instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}   #实例名称
+
+    #自定义元数据
+    metadata-map:
+      now: 2022

xjs-study/springcloud-project/eureka/eureka-server-8761/pom.xml

@@ -0,0 +1,27 @@
+<?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">
+    <parent>
+        <artifactId>eureka</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <name>Eureka服务端8761</name>
+
+    <artifactId>eureka-server-8761</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

xjs-study/springcloud-project/eureka/eureka-server-8761/src/main/java/com/xjs/EurekaServerApp8761.java

@@ -0,0 +1,21 @@
+package com.xjs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+/**
+ * eureka服务端启动器
+ * @author xiejs
+ * @since 2022-05-24
+ */
+@SpringBootApplication
+//声明当前项目为为Eureka服务
+@EnableEurekaServer
+public class EurekaServerApp8761 {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaServerApp8761.class, args);
+        System.out.println("localhost:8761");
+    }
+}

xjs-study/springcloud-project/eureka/eureka-server-8761/src/main/resources/application.yml

@@ -0,0 +1,21 @@
+#eureka server端口
+server:
+  port: 8761
+
+spring:
+  application:
+    name: eureka-server   #应用名称，在Eureka中作为服务名称
+
+#eureka客户端配置（和Server交互） ,Eureka Server 其实也是一个Client
+eureka:
+  instance:
+    hostname: localhost   #当前eureka实例的主机名
+    prefer-ip-address: true
+    instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}   #实例名称
+
+  client:
+    service-url:
+      # 集群模式下 defaultZone应该指向其他 Eureka server
+      defaultZone: http://localhost:8762/eureka/,http://localhost:8763/eureka/
+    register-with-eureka: true   #当前自己就是server，不需要注册自己  集群模式可以改成true
+    fetch-registry: true   #查询获取注册中心的服务信息，自己就是Server，不需要从Eureka server获取服务信息

xjs-study/springcloud-project/eureka/eureka-server-8762/pom.xml

@@ -0,0 +1,27 @@
+<?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">
+    <parent>
+        <artifactId>eureka</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <name>Eureka服务端8762</name>
+
+    <artifactId>eureka-server-8762</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

xjs-study/springcloud-project/eureka/eureka-server-8762/src/main/java/com/xjs/EurekaServerApp8762.java

@@ -0,0 +1,21 @@
+package com.xjs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+/**
+ * eureka服务端启动器
+ * @author xiejs
+ * @since 2022-05-24
+ */
+@SpringBootApplication
+//声明当前项目为为Eureka服务
+@EnableEurekaServer
+public class EurekaServerApp8762 {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaServerApp8762.class, args);
+        System.out.println("localhost:8762");
+    }
+}

xjs-study/springcloud-project/eureka/eureka-server-8762/src/main/resources/application.yml

@@ -0,0 +1,20 @@
+#eureka server端口
+server:
+  port: 8762
+
+spring:
+  application:
+    name: eureka-server   #应用名称，在Eureka中作为服务名称
+
+#eureka客户端配置（和Server交互） ,Eureka Server 其实也是一个Client
+eureka:
+  instance:
+    hostname: localhost   #当前eureka实例的主机名
+    prefer-ip-address: true
+    instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}   #实例名称
+
+  client:
+    service-url:
+      defaultZone: http://localhost:8761/eureka/,http://localhost:8763/eureka/
+    register-with-eureka: true   #当前自己就是server，不需要注册自己
+    fetch-registry: true   #查询获取注册中心的服务信息，自己就是Server，不需要从Eureka server获取服务信息

xjs-study/springcloud-project/eureka/eureka-server-8763/pom.xml

@@ -0,0 +1,27 @@
+<?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">
+    <parent>
+        <artifactId>eureka</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <name>Eureka服务端8763</name>
+
+    <artifactId>eureka-server-8763</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
+        </dependency>
+    </dependencies>
+
+</project>

xjs-study/springcloud-project/eureka/eureka-server-8763/src/main/java/com/xjs/EurekaServerApp8763.java

@@ -0,0 +1,21 @@
+package com.xjs;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+/**
+ * eureka服务端启动器
+ * @author xiejs
+ * @since 2022-05-24
+ */
+@SpringBootApplication
+//声明当前项目为为Eureka服务
+@EnableEurekaServer
+public class EurekaServerApp8763 {
+
+    public static void main(String[] args) {
+        SpringApplication.run(EurekaServerApp8763.class, args);
+        System.out.println("localhost:8763");
+    }
+}

xjs-study/springcloud-project/eureka/eureka-server-8763/src/main/resources/application.yml

@@ -0,0 +1,20 @@
+#eureka server端口
+server:
+  port: 8763
+
+spring:
+  application:
+    name: eureka-server   #应用名称，在Eureka中作为服务名称
+
+#eureka客户端配置（和Server交互） ,Eureka Server 其实也是一个Client
+eureka:
+  instance:
+    hostname: localhost   #当前eureka实例的主机名
+    prefer-ip-address: true
+    instance-id: ${spring.cloud.client.ip-address}:${spring.application.name}:${server.port}   #实例名称
+
+  client:
+    service-url:
+      defaultZone: http://localhost:8761/eureka/,http://localhost:8762/eureka/
+#    register-with-eureka: true   #当前自己就是server，不需要注册自己
+#    fetch-registry: true   #查询获取注册中心的服务信息，自己就是Server，不需要从Eureka server获取服务信息

xjs-study/springcloud-project/eureka/pom.xml

@@ -0,0 +1,66 @@
+<?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">
+    <parent>
+        <artifactId>springcloud-project</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <packaging>pom</packaging>
+    <name>Eureka注册中心</name>
+    <modules>
+        <module>eureka-server-8761</module>
+        <module>eureka-server-8762</module>
+        <module>eureka-server-8763</module>
+        <module>eureka-client-provider</module>
+        <module>eureka-client-consumer</module>
+    </modules>
+
+    <artifactId>eureka</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <!--引⼊Jaxb，开始-->
+        <dependency>
+            <groupId>com.sun.xml.bind</groupId>
+            <artifactId>jaxb-core</artifactId>
+            <version>2.2.11</version>
+        </dependency>
+        <dependency>
+            <groupId>javax.xml.bind</groupId>
+            <artifactId>jaxb-api</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.sun.xml.bind</groupId>
+            <artifactId>jaxb-impl</artifactId>
+            <version>2.2.11</version>
+        </dependency>
+        <dependency>
+            <groupId>org.glassfish.jaxb</groupId>
+            <artifactId>jaxb-runtime</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>javax.activation</groupId>
+            <artifactId>activation</artifactId>
+            <version>1.1.1</version>
+        </dependency>
+        <!--引⼊Jaxb，结束-->
+    </dependencies>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-commons</artifactId>
+                <version>3.0.4</version>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+</project>

xjs-study/springcloud-project/pom.xml

@@ -0,0 +1,24 @@
+<?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">
+    <parent>
+        <artifactId>xjs-study</artifactId>
+        <groupId>com.xjs</groupId>
+        <version>1.0</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+    <packaging>pom</packaging>
+    <name>微服务组件</name>
+    <modules>
+        <module>eureka</module>
+    </modules>
+
+    <artifactId>springcloud-project</artifactId>
+
+    <properties>
+        <maven.compiler.source>11</maven.compiler.source>
+        <maven.compiler.target>11</maven.compiler.target>
+    </properties>
+
+</project>