项目依赖

需要org.apache.dubbo.dubbo-dependencies-bom, 需要org.apache.dubbo.dubbo-spring-boot-starter, 当前版本有2.7.0和2.7.1, dubbo版本已经发布到2.7.2了, 但是starter还没更新到2.7.2, 所以整体使用2.7.1版本

另外就是spring-boot的org.springframework.boot.spring-boot-dependencies, org.springframework.boot.spring-boot-starter-test

org.apache.dubbo.dubbo中带了springframework, javax.servlet, log4j, 在pom中要排除掉

在项目的maven settings.xml中, 只需要配public就可以, 不需要Apache Snapshot. 检查一下public底下有没有org.apache.dubbo, 没有的话, 把Central的proxy源配置到 http://repo1.maven.org/maven2/ 这个是最源头的仓库了, 现在从墙里访问速度也不慢.

Root模块

给项目随便起了个名字叫DB, 这个是root的pom内容

<?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.rockbb</groupId>

    <artifactId>db</artifactId>

    <packaging>pom</packaging>

    <version>1.0-SNAPSHOT</version>

    <name>DB: Root</name>

    <modules>

        <module>../db-commons-api</module>

        <module>../db-commons-impl</module>

        <module>../db-admin</module>

    </modules>

    <prerequisites>

        <maven>3.3.9</maven>

    </prerequisites>

    <properties>

        <!-- Global encoding -->

        <project.jdk.version>1.8</project.jdk.version>

        <project.source.encoding>UTF-8</project.source.encoding>

        <!-- Global dependency versions -->

        <springframework.boot.version>2.1.6.RELEASE</springframework.boot.version>

        <dubbo.version>2.7.1</dubbo.version>

        <development.mode>1</development.mode>

        <development.developer>milton</development.developer>

        <timestamp>${maven.build.timestamp}</timestamp>

        <maven.build.timestamp.format>yyyyMMdd_HHmm</maven.build.timestamp.format>

        <dubbo.application.version>develop-${development.developer}</dubbo.application.version>

        <log.path>d:/logs</log.path>

        <log.level>INFO</log.level>

        <log.appender>stdout</log.appender>

        <admin.root.path></admin.root.path>

    </properties>

    <dependencyManagement>

        <dependencies>

            <!-- Spring Boot Dependencies -->

            <dependency>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-dependencies</artifactId>

                <version>${springframework.boot.version}</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

            <!-- Apache Dubbo Dependencies -->

            <dependency>

                <groupId>org.apache.dubbo</groupId>

                <artifactId>dubbo-dependencies-bom</artifactId>

                <version>${dubbo.version}</version>

                <type>pom</type>

                <scope>import</scope>

            </dependency>

            <dependency>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-starter-test</artifactId>

                <version>${springframework.boot.version}</version>

                <scope>test</scope>

            </dependency>

            <dependency>

                <groupId>org.apache.dubbo</groupId>

                <artifactId>dubbo-spring-boot-starter</artifactId>

                <version>${dubbo.version}</version>

            </dependency>

            <dependency>

                <groupId>org.apache.dubbo</groupId>

                <artifactId>dubbo</artifactId>

                <version>${dubbo.version}</version>

                <exclusions>

                    <exclusion>

                        <groupId>org.springframework</groupId>

                        <artifactId>spring</artifactId>

                    </exclusion>

                    <exclusion>

                        <groupId>javax.servlet</groupId>

                        <artifactId>servlet-api</artifactId>

                    </exclusion>

                    <exclusion>

                        <groupId>log4j</groupId>

                        <artifactId>log4j</artifactId>

                    </exclusion>

                </exclusions>

            </dependency>

        </dependencies>

    </dependencyManagement>

    <build>

        <pluginManagement>

            <plugins>

                <plugin>

                    <groupId>org.apache.maven.plugins</groupId>

                    <artifactId>maven-compiler-plugin</artifactId>

                    <version>3.8.0</version>

                    <configuration>

                        <source>${project.jdk.version}</source>

                        <target>${project.jdk.version}</target>

                        <encoding>${project.source.encoding}</encoding>

                    </configuration>

                </plugin>

                <plugin>

                    <groupId>org.apache.maven.plugins</groupId>

                    <artifactId>maven-resources-plugin</artifactId>

                    <version>3.1.0</version>

                    <configuration>

                        <encoding>${project.source.encoding}</encoding>

                    </configuration>

                </plugin>

                <plugin>

                    <groupId>org.apache.maven.plugins</groupId>

                    <artifactId>maven-deploy-plugin</artifactId>

                    <version>2.8.2</version>

                </plugin>

                <plugin>

                    <groupId>org.springframework.boot</groupId>

                    <artifactId>spring-boot-maven-plugin</artifactId>

                    <version>${springframework.boot.version}</version>

                </plugin>

            </plugins>

        </pluginManagement>

    </build>

</project>

root模块用于规定全局的版本号, 以及完整构建

API模块

这是用于服务端暴露接口信息给消费端的模块, 要尽量简单干净依赖少, 避免依赖污染. 这个是api模块的pom内容

<?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>

    <parent>

        <groupId>com.rockbb</groupId>

        <artifactId>db</artifactId>

        <version>1.0-SNAPSHOT</version>

        <relativePath>../db/pom.xml</relativePath>

    </parent>

    <artifactId>db-commons-api</artifactId>

    <packaging>jar</packaging>

    <name>DB: Commons API</name>

    <dependencies>

    </dependencies>

</project>

Commons模块

这个是服务端接口具体实现的模块, 需要启动服务, 注册自己到服务注册中心(这里使用的是zookeeper).

pom文件

<?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>

    <parent>

        <groupId>com.rockbb</groupId>

        <artifactId>db</artifactId>

        <version>1.0-SNAPSHOT</version>

        <relativePath>../db/pom.xml</relativePath>

    </parent>

    <artifactId>db-commons-impl</artifactId>

    <packaging>jar</packaging>

    <name>DB: Commons Implementation</name>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.dubbo</groupId>

            <artifactId>dubbo-spring-boot-starter</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.dubbo</groupId>

            <artifactId>dubbo</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.curator</groupId>

            <artifactId>curator-recipes</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.zookeeper</groupId>

            <artifactId>zookeeper</artifactId>

            <exclusions>

                <exclusion>

                    <groupId>org.slf4j</groupId>

                    <artifactId>slf4j-api</artifactId>

                </exclusion>

                <exclusion>

                    <groupId>org.slf4j</groupId>

                    <artifactId>slf4j-log4j12</artifactId>

                </exclusion>

                <exclusion>

                    <groupId>log4j</groupId>

                    <artifactId>log4j</artifactId>

                </exclusion>

            </exclusions>

        </dependency>

        <dependency>

            <groupId>com.rockbb</groupId>

            <artifactId>db-commons-api</artifactId>

            <version>${project.version}</version>

        </dependency>

    </dependencies>

    <build>

        <finalName>db-commons</finalName>

        <resources>

            <resource>

                <directory>src/main/resources</directory>

                <filtering>true</filtering>

            </resource>

        </resources>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

            </plugin>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-resources-plugin</artifactId>

            </plugin>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <executions>

                    <execution>

                        <goals>

                            <goal>repackage</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-deploy-plugin</artifactId>

                <configuration>

                    <skip>true</skip>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

.因为zookeeper里带的logger和外面的logger冲突并且版本较低, 所以将zookeeper里的logger排除掉了.

.在build模块中, 用maven-deploy-plugin.configruation.skip: true 避免将本模块install到本地. 因为这是最终部署用的末端模块, 不会再有模块依赖于这个模块

application.yml文件

server:

  port: 8760

spring:

  application:

    name: db-commons

dubbo:

  application:

    name: db-commons-@development.developer@ # Application name is the unique identifier of an application. It is for registry combing the dependencies of applications. Note: Consumer and provider application name should not be the same, and this parameter is not a match condition. As a suggestion, you can name it as your project name.

    qos:

      enable: false # Activate QoS or not

      port: 33333 # The port QoS would bind to

      accept:

        foreign:

          ip: false # Enable remote access or not

  registry:

    protocol: zookeeper # The protocol of the registry center. dubbo, multicast, zookeeper, redis, consul(2.7.1), sofa(2.7.2), etcd(2.7.2), nacos(2.7.2) are available.

    address: 127.0.0.1:2181

  provider:

    delay: -1 # The delay time(ms) for registering services. When set to -1, it indicates that the services will expose to registry after the Spring context is initialized

    timeout: 30000 # The RPC timeout(ms)

    retries: 0 # The retry count for RPC, not including the first invoke. Please set it to 0 if don't need to retry.

    version: @dubbo.application.version@

  protocol:

    id: dubbo # Bean Id of the protocol, can be referenced in <dubbo:service protocol=""> The default value is equal to the value of name attribute while id is not filled. If name value has already existed, it will add index to it's suffix.

    name: dubbo

    accepts: 500 # The maximum connection count of the service provider

    # dubbo协议缺省端口为20880，rmi协议缺省端口为1099，http和hessian协议缺省端口为80；如果配置为-1 或者 没有配置port则会分配一个没有被占用的端口。Dubbo 2.4.0+，分配的端口在协议缺省端口的基础上增长，确保端口段可控。

    port: 10080

    serialization: hessian2 # The default serialization of dubbo protocol is hessian2, rmi protocol is java, http protocol is json

ApplicationBoot.java文件

import org.apache.dubbo.config.spring.context.annotation.EnableDubbo;

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@EnableDubbo

@SpringBootApplication

public class ApplicationBoot {

    public static void main(String[] args) {

        SpringApplication.run(ApplicationBoot.class, args);

    }

}

DemoServiceImpl文件　　

import com.rockbb.db.commons.api.service.DemoService;

import org.apache.dubbo.config.annotation.Service;

import org.springframework.stereotype.Component;

@Service

@Component

public class DemoServiceImpl implements DemoService {

    @Override

    public String hello(String name) {

        return "Hello " + name;

    }

}

Admin模块(消费端)

这里用到了web, 展示层使用的是freemarker.

pom文件

<?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>

    <parent>

        <groupId>com.rockbb</groupId>

        <artifactId>db</artifactId>

        <version>1.0-SNAPSHOT</version>

        <relativePath>../db/pom.xml</relativePath>

    </parent>

    <artifactId>db-admin</artifactId>

    <packaging>jar</packaging>

    <name>DB: Admin</name>

    <dependencies>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-web</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-freemarker</artifactId>

        </dependency>

        <dependency>

            <groupId>org.springframework.boot</groupId>

            <artifactId>spring-boot-starter-test</artifactId>

            <scope>test</scope>

        </dependency>

        <dependency>

            <groupId>org.apache.dubbo</groupId>

            <artifactId>dubbo-spring-boot-starter</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.dubbo</groupId>

            <artifactId>dubbo</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.curator</groupId>

            <artifactId>curator-recipes</artifactId>

        </dependency>

        <dependency>

            <groupId>org.apache.zookeeper</groupId>

            <artifactId>zookeeper</artifactId>

            <exclusions>

                <exclusion>

                    <groupId>org.slf4j</groupId>

                    <artifactId>slf4j-api</artifactId>

                </exclusion>

                <exclusion>

                    <groupId>org.slf4j</groupId>

                    <artifactId>slf4j-log4j12</artifactId>

                </exclusion>

                <exclusion>

                    <groupId>log4j</groupId>

                    <artifactId>log4j</artifactId>

                </exclusion>

            </exclusions>

        </dependency>

        <dependency>

            <groupId>com.rockbb</groupId>

            <artifactId>db-commons-api</artifactId>

            <version>${project.version}</version>

        </dependency>

    </dependencies>

    <build>

        <finalName>db-admin</finalName>

        <resources>

            <resource>

                <directory>src/main/resources</directory>

                <filtering>false</filtering>

                <excludes>

                    <exclude>*.yml</exclude>

                    <exclude>*.xml</exclude>

                </excludes>

            </resource>

            <resource>

                <directory>src/main/resources</directory>

                <filtering>true</filtering>

                <includes>

                    <include>*.yml</include>

                    <include>*.xml</include>

                </includes>

            </resource>

        </resources>

        <plugins>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-compiler-plugin</artifactId>

            </plugin>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-resources-plugin</artifactId>

            </plugin>

            <plugin>

                <groupId>org.springframework.boot</groupId>

                <artifactId>spring-boot-maven-plugin</artifactId>

                <executions>

                    <execution>

                        <goals>

                            <goal>repackage</goal>

                        </goals>

                    </execution>

                </executions>

            </plugin>

            <plugin>

                <groupId>org.apache.maven.plugins</groupId>

                <artifactId>maven-deploy-plugin</artifactId>

                <configuration>

                    <skip>true</skip>

                </configuration>

            </plugin>

        </plugins>

    </build>

</project>

application.yml文件

server:

  port: 8764

  servlet:

    session:

      timeout: 600

    context-path: @admin.root.path@

spring:

  application:

    name: db-admin

  freemarker:

    cache: true

    settings:

      auto_import: spring.ftl as S

      number_format: '#'

      template_update_delay: 0

      default_encoding: UTF-8

      datetime_format: yyyy-MM-dd HH:mm:ss

      classic_compatible: true

      template_exception_handler: ignore

  mvc:

    view:

      prefix: /templates/

      suffix: .ftl

dubbo:

  application:

    name: db-admin-@development.developer@ # Application name is the unique identifier of an application. It is for registry combing the dependencies of applications. Note: Consumer and provider application name should not be the same, and this parameter is not a match condition. As a suggestion, you can name it as your project name.

    qos:

      enable: false # Activate QoS or not

      port: 33333 # The port QoS would bind to

      accept:

        foreign:

          ip: false # Enable remote access or not

  registry:

    protocol: zookeeper # The protocol of the registry center. dubbo, multicast, zookeeper, redis, consul(2.7.1), sofa(2.7.2), etcd(2.7.2), nacos(2.7.2) are available.

    address: 127.0.0.1:2181

  consumer:

    version: @dubbo.application.version@

    check: false

ApplicationBoot.java

import org.springframework.boot.SpringApplication;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication

public class ApplicationBoot {

    public static void main(String[] args) {

        SpringApplication.run(ApplicationBoot.class, args);

    }

}

DemoController.java

import com.rockbb.db.commons.api.service.DemoService;

import org.apache.dubbo.config.annotation.Reference;

import org.slf4j.Logger;

import org.slf4j.LoggerFactory;

import org.springframework.stereotype.Controller;

import org.springframework.web.bind.annotation.RequestMapping;

import javax.servlet.http.HttpServletRequest;

@Controller

public class DemoController {

    private static Logger logger = LoggerFactory.getLogger(DemoController.class);

    @Reference

    private DemoService demoService;

    @RequestMapping(value = {"/", "/index"})

    public String doIndex(HttpServletRequest request) {

        String name = request.getParameter("name");

        if (name != null) {

            name = demoService.hello(name);

        }

        logger.info("Name: {}", name);

        return "index";

    }

}

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