Spring Cloud Feign 声明式服务调用

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/pom.xml

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+<?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>Eureka-Client</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>Eureka-Client</name>
+    <description>Demo project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.13.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>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>Edgware.SR3</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+    <dependencies>
+
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-eureka</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter</artifactId>
+        </dependency>
+    </dependencies>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/src/main/java/com/example/demo/DemoApplication.java

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+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
+import org.springframework.cloud.client.discovery.EnableDiscoveryClient;
+
+@EnableDiscoveryClient
+@SpringBootApplication(exclude = {DataSourceAutoConfiguration.class})
+public class DemoApplication {
+
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+}

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/src/main/java/com/example/demo/controller/TestController.java

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+package com.example.demo.controller;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+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.RestController;
+
+@RestController
+public class TestController {
+
+    private Logger log = LoggerFactory.getLogger(this.getClass());
+
+    @Autowired
+    private DiscoveryClient client;
+
+    @GetMapping("/info")
+    public String info() {
+        @SuppressWarnings("deprecation")
+        ServiceInstance instance = client.getLocalServiceInstance();
+        String info = "host：" + instance.getHost() + "，service_id：" + instance.getServiceId();
+        log.info(info);
+        return info;
+    }
+
+    @GetMapping("/hello")
+    public String hello() {
+        return "hello world";
+    }
+}

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/src/main/java/com/example/demo/controller/UserController.java

@@ -0,0 +1,47 @@
+package com.example.demo.controller;
+
+import com.example.demo.domain.User;
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+import org.springframework.web.bind.annotation.*;
+
+import java.util.ArrayList;
+import java.util.List;
+
+@RestController
+@RequestMapping("user")
+public class UserController {
+
+    private Logger log = LoggerFactory.getLogger(this.getClass());
+
+    @GetMapping("/{id:\\d+}")
+    public User get(@PathVariable Long id) {
+        log.info("获取用户id为 " + id + "的信息");
+        return new User(id, "mrbird", "123456");
+    }
+
+    @GetMapping
+    public List<User> get() {
+        List<User> list = new ArrayList<>();
+        list.add(new User(1L, "mrbird", "123456"));
+        list.add(new User(2L, "scott", "123456"));
+        log.info("获取用户信息 " + list);
+        return list;
+    }
+
+    @PostMapping
+    public void add(@RequestBody User user) {
+        log.info("新增用户成功 " + user);
+    }
+
+    @PutMapping
+    public void update(@RequestBody User user) {
+        log.info("更新用户成功 " + user);
+    }
+
+    @DeleteMapping("/{id:\\d+}")
+    public void delete(@PathVariable Long id) {
+        log.info("删除用户成功 " + id);
+    }
+
+}

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/src/main/java/com/example/demo/domain/User.java

@@ -0,0 +1,55 @@
+package com.example.demo.domain;
+
+import java.io.Serializable;
+
+public class User implements Serializable {
+
+    private static final long serialVersionUID = 1339434510787399891L;
+    private Long id;
+
+    private String username;
+
+    private String password;
+
+    public User() {
+    }
+
+    public User(Long id, String username, String password) {
+        this.id = id;
+        this.username = username;
+        this.password = password;
+    }
+
+    public Long getId() {
+        return id;
+    }
+
+    public void setId(Long id) {
+        this.id = id;
+    }
+
+    public String getUsername() {
+        return username;
+    }
+
+    public void setUsername(String username) {
+        this.username = username;
+    }
+
+    public String getPassword() {
+        return password;
+    }
+
+    public void setPassword(String password) {
+        this.password = password;
+    }
+
+    @Override
+    public String toString() {
+        return "User{" +
+                "id=" + id +
+                ", username='" + username + '\'' +
+                ", password='" + password + '\'' +
+                '}';
+    }
+}

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Client/src/main/resources/application.yml

@@ -0,0 +1,13 @@
+server:
+  port: 8082
+
+spring:
+  application:
+    name: Server-Provider
+
+eureka:
+  client:
+    register-with-eureka: true
+    fetch-registry: true
+    serviceUrl:
+      defaultZone: http://mrbird:123456@peer1:8080/eureka/,http://mrbird:123456@peer2:8081/eureka/

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Service/pom.xml

@@ -0,0 +1,69 @@
+<?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>Eureka-Service</artifactId>
+    <version>0.0.1-SNAPSHOT</version>
+    <packaging>jar</packaging>
+
+    <name>Eureka-Service</name>
+    <description>Demo project for Spring Boot</description>
+
+    <parent>
+        <groupId>org.springframework.boot</groupId>
+        <artifactId>spring-boot-starter-parent</artifactId>
+        <version>1.5.13.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>
+    </properties>
+
+    <dependencyManagement>
+        <dependencies>
+            <dependency>
+                <groupId>org.springframework.cloud</groupId>
+                <artifactId>spring-cloud-dependencies</artifactId>
+                <version>Edgware.SR3</version>
+                <type>pom</type>
+                <scope>import</scope>
+            </dependency>
+        </dependencies>
+    </dependencyManagement>
+
+    <dependencies>
+        <dependency>
+            <groupId>org.springframework.cloud</groupId>
+            <artifactId>spring-cloud-starter-eureka-server</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>org.springframework.boot</groupId>
+            <artifactId>spring-boot-starter-security</artifactId>
+        </dependency>
+
+    </dependencies>
+
+    <repositories>
+        <repository>
+            <id>nexus-aliyun</id>
+            <name>Nexus aliyun</name>
+            <url>http://maven.aliyun.com/nexus/content/groups/public</url>
+        </repository>
+    </repositories>
+
+    <build>
+        <plugins>
+            <plugin>
+                <groupId>org.springframework.boot</groupId>
+                <artifactId>spring-boot-maven-plugin</artifactId>
+            </plugin>
+        </plugins>
+    </build>
+
+
+</project>

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Service/src/main/java/com/example/demo/DemoApplication.java

@@ -0,0 +1,14 @@
+package com.example.demo;
+
+import org.springframework.boot.SpringApplication;
+import org.springframework.boot.autoconfigure.SpringBootApplication;
+import org.springframework.cloud.netflix.eureka.server.EnableEurekaServer;
+
+
+@EnableEurekaServer
+@SpringBootApplication
+public class DemoApplication {
+    public static void main(String[] args) {
+        SpringApplication.run(DemoApplication.class, args);
+    }
+}

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Service/src/main/resources/application-peer1.yml

@@ -0,0 +1,15 @@
+server:
+  port: 8080
+
+spring:
+  application:
+    name: Eureka-Server
+
+eureka:
+  instance:
+    hostname: peer1
+  client:
+    serviceUrl:
+      defaultZone: http://mrbird:123456@peer2:8081/eureka/
+  server:
+    enable-self-preservation: false

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Service/src/main/resources/application-peer2.yml

@@ -0,0 +1,15 @@
+server:
+  port: 8081
+
+spring:
+  application:
+    name: Eureka-Server
+
+eureka:
+  instance:
+    hostname: peer2
+  client:
+    serviceUrl:
+      defaultZone: http://mrbird:123456@peer1:8080/eureka/
+  server:
+    enable-self-preservation: false

33.Spring-Cloud-Feign-Declarative-REST-Client/Eureka-Service/src/main/resources/application.yml

@@ -0,0 +1,9 @@
+security:
+  basic:
+    enabled: true
+  user:
+    name: mrbird
+    password: 123456
+spring:
+  profiles:
+    active: peer1