Spring Cloud Initialization Project-李状的博客

Spring Cloud Init Project

Description

Registration Center: netflix-eureka-server
Configuration Center: config-server
Service Provider: netflix-eureka-client starter-config
Serving Consumer: netflix-eureka-client starter-config starter-openfeign

Load balance by feign.

Create maven project

Introduce dependencies spring-cloud-demo\pom.xml:

  <parent>
      <artifactId>spring-boot-starter-parent</artifactId>
      <groupId>org.springframework.boot</groupId>
      <version>2.0.7.RELEASE</version>
  </parent>

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

      <!-- JDK 9 缺失jar -->
      <dependency>
          <groupId>javax.xml.bind</groupId>
          <artifactId>jaxb-api</artifactId>
          <version>2.3.0</version>
      </dependency>

      <dependency>
          <groupId>com.sun.xml.bind</groupId>
          <artifactId>jaxb-impl</artifactId>
          <version>2.3.0</version>
      </dependency>

      <dependency>
          <groupId>com.sun.xml.bind</groupId>
          <artifactId>jaxb-core</artifactId>
          <version>2.3.0</version>
      </dependency>

      <dependency>
          <groupId>javax.activation</groupId>
          <artifactId>activation</artifactId>
          <version>1.1.1</version>
      </dependency>

      <dependency>
          <groupId>org.projectlombok</groupId>
          <artifactId>lombok</artifactId>
          <optional>true</optional>
      </dependency>
  </dependencies>

  <dependencyManagement>
      <dependencies>
          <dependency>
              <groupId>org.springframework.cloud</groupId>
              <artifactId>spring-cloud-dependencies</artifactId>
              <version>Finchley.SR2</version>
              <type>pom</type>
              <scope>import</scope>
          </dependency>
      </dependencies>
  </dependencyManagement>

Add Registration Center Module

Introduce dependencies spring-cloud-demo\eurekaserver\pom.xml:

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-starter-netflix-eureka-server</artifactId>
        <version>2.0.2.RELEASE</version>
    </dependency>
</dependencies>

Add config eurekaserver\src\main\resources\application.yml:

server:
  port: 8761
eureka:
  client:
    service-url:
      defaultZone: http://localhost:8761/eureka/
    register-with-eureka: false
    fetch-registry: false

Add startup class eurekaserver\src\main\java\com\augmentum\EurekaServerApplication.java:

@SpringBootApplication
@EnableEurekaServer
public class EurekaServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(EurekaServerApplication.class, args);
    }
}

Add Configuration Center Module

Introduce dependencies spring-cloud-demo\configserver\pom.xml:

<dependencies>
    <dependency>
        <groupId>org.springframework.cloud</groupId>
        <artifactId>spring-cloud-config-server</artifactId>
        <version>2.0.2.RELEASE</version>
    </dependency>
</dependencies>

Add config configserver\src\main\resources\application.yml:

server:
  port: 8762
spring:
  application:
    name: configserver
  profiles:
    active: native  #Get service provider configs from native or git.

  cloud:
    config:
      server:
        native:
          search-locations: classpath:/shared    #Service provider native config path.

Add startup class configserver\src\main\java\com\augmentum\ConfigServerApplication.java:

@SpringBootApplication
@EnableConfigServer
public class ConfigServerApplication {
    public static void main(String[] args) {
        SpringApplication.run(ConfigServerApplication.class, args);
    }
}

Add Service Provider Module

Introduce dependencies spring-cloud-demo\menu\pom.xml:

  <dependencies>
      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
          <version>2.0.2.RELEASE</version>
      </dependency>

      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-config</artifactId>
          <version>2.0.2.RELEASE</version>
      </dependency>

      <dependency>
          <groupId>org.mybatis.spring.boot</groupId>
          <artifactId>mybatis-spring-boot-starter</artifactId>
          <version>1.3.1</version>
      </dependency>

      <dependency>
          <groupId>mysql</groupId>
          <artifactId>mysql-connector-java</artifactId>
          <version>8.0.11</version>
      </dependency>
  </dependencies>

Add entity menu\src\main\java\com\augmentum\entity\Menu.java:

import lombok.Data;

@Data
public class Menu {
    private long id;
    private String name;
    private double price;
    private String flavor;
}

Add Repository interface menu\src\main\java\com\augmentum\repository\MenuRepository.java:

public interface MenuRepository {
    public List<Menu> findAll(int index, int limit);
    public int count();
    public Menu findById(long id);
    public void save(Menu menu);
    public void update(Menu menu);
    public void delete(long id);
}

Add Mapper menu\src\main\resources\mapping\MenuRepository.xml:

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE mapper PUBLIC "-//mybatis.org//DTD Mapper 3.0//EN"
        "http://mybatis.org/dtd/mybatis-3-mapper.dtd">
<mapper namespace="com.augmentum.repository.MenuRepository">
    <select id="findAll" resultType="Menu">
        select * from t_menu limit #{param1}, #{param2}
    </select>

    <select id="count" resultType="int">
        select count(id) from t_menu
    </select>

    <select id="findById" parameterType="long" resultType="Menu">
        select * from t_menu where id = #{id}
    </select>

    <insert id="save" parameterType="Menu">
        insert into t_menu(name, price, flavor) values(#{name}, #{price}, #{flavor})
    </insert>

    <update id="update" parameterType="Menu">
        update t_menu set name = #{name}, price = #{price}, flavor = #{flavor} where id = #{id}
    </update>

    <delete id="delete" parameterType="long">
        delete from t_menu where id = #{id}
    </delete>
</mapper>

Add Handler menu\src\main\java\com\augmentum\controller\MenuHandler.java:

@RestController
@RequestMapping("/menu")
public class MenuHandler {

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

    @Autowired
    private MenuRepository menuRepository;

    @GetMapping("/index")
    public String index() {
        return "menu's port : " + port;
    }

    @GetMapping("/findAll/{index}/{limit}")
    public List<Menu> findAll(@PathVariable("index") int index, @PathVariable("limit") int limit) {
        return menuRepository.findAll(index, limit);
    }
}

Add Service Provider config to Configuration Cneter configserver\src\main\resources\shared\menu-dev.yml:

server:
  port: 8020
spring:
  datasource:
    url: jdbc:mysql://localhost:3306/springclouddemo
    username: root
    password: root
    driver-class-name: com.mysql.cj.jdbc.Driver
mybatis:
  mapper-locations: classpath:/mapping/*.xml
  type-aliases-package: com.augmentum.entity

Add config to read Configuration Center config menu\src\main\resources\bootstrap.yml:

spring:
  application:
    name: menu
  profiles:
    active: dev
  cloud:
    config:
      uri: http://localhost:8762    # Configuration center uri

      fail-fast: true

Add startup class menu\src\main\java\com\augmentum\MenuApplication.java:

@SpringBootApplication
@MapperScan("com.augmentum.repository")
public class MenuApplication {
    public static void main(String[] args) {
        SpringApplication.run(MenuApplication.class, args);
    }
}

Add Service Consumer Module

Introduce dependencies spring-cloud-demo\client\pom.xml:

  <dependencies>
      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-netflix-eureka-client</artifactId>
          <version>2.0.2.RELEASE</version>
      </dependency>

      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-config</artifactId>
          <version>2.0.2.RELEASE</version>
      </dependency>

      <dependency>
          <groupId>org.springframework.cloud</groupId>
          <artifactId>spring-cloud-starter-openfeign</artifactId>
          <version>2.0.2.RELEASE</version>
      </dependency>

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

Add entity client\src\main\java\com\augmentum\entity\Menu.java:

import lombok.Data;

@Data
public class Menu {
    private long id;
    private String name;
    private double price;
    private String flavor;
}

Add Feign interface client\src\main\java\com\augmentum\feign\MenuFeign.java:

@FeignClient(value = "menu")
public interface MenuFeign {
    @GetMapping("/menu/findAll/{index}/{limit}")
    public List<Menu> findAll(@PathVariable("index") int index, @PathVariable("limit") int limit);
}

Add Handler client\src\main\java\com\augmentum\controller\ClientHandler.java:

@RestController
@RequestMapping("/client")
public class ClientHandler {

    @Autowired
    private MenuFeign menuFeign;

    @GetMapping("/findAll/{index}/{limit}")
    public List<Menu> findAll(@PathVariable("index") int index, @PathVariable("limit") int limit) {
        return menuFeign.findAll(index, limit);
    }
}

Add Service Consumer config to Configuration Cneter configserver\src\main\resources\shared\client-dev.yml:
```
server:
  port: 8030
spring:
  thymeleaf:
    prefix: classpath:/static/
    suffix: .html
```

Add config to read Configuration Center config client\src\main\resources\bootstrap.yml:

spring:
  application:
    name: client
  profiles:
    active: dev
  cloud:
    config:
      uri: http://localhost:8762    # Configuration center uri

      fail-fast: true

Add startup class client\src\main\java\com\augmentum\ClientApplication.java:

@SpringBootApplication
@EnableFeignClients
public class ClientApplication {
    public static void main(String[] args) {
        SpringApplication.run(ClientApplication.class, args);
    }
}

Issue

github: https://github.com/leezhuang96/spring-cloud-demo

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Spring Cloud Initialization Project

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