• dubbo本地服务化实现(dubbo三)


    一、dubbo服务化架构包含的内容

      对于传统工程而言,分层的依据是按照包来区分。由于在相同的工程中,所以服务的提供和调用可以方便的实现。

    但是对于分布式架构而言,服务的提供者负责服务具体的实现和接口规范,服务的消费者只关心接口规范即可。但是

    无论是服务的提供者还是服务的消费者都会涉及到诸如公共工具类、接口、DO、VO、等公共代码,因此一个简单的

    dubbo服务架构模式如下:

    服务提供者:提供服务接口的实现,发布服务地址,提供服务

    服务消费者:获取服务地址,使用服务接口调用服务,处理服务调用结果

    公共项目: 包含公共配置:DO(和数据库同步,用于持久化对象)、VO(传输数据)、工具包、接口等

    依赖关系:依赖项目就像依赖jar包一样

    二、创建公共项目工程

      创建公共项目工程,普通的maven项目,提供utils、DO、接口等代码

    三、服务提供者实现

      普通的Maven工程(依赖Dubbo),提供服务实现、服务启动功能。

      ①:创建项目并导入dubbo.jar

      pom.xml
    
      <dependencies>
           <dependency>
          <groupId>cn.itsource.dubbo.core</groupId>
          <artifactId>dubbo-demo-core</artifactId>
          <version>0.0.1-SNAPSHOT</version>
        </dependency>
    
       <!--以上的导入就是公共部分。-->
           <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>dubbo</artifactId>
          <version>2.8.4a</version>
        </dependency>
        <dependency>
          <groupId>com.101tec</groupId>
          <artifactId>zkclient</artifactId>
          <version>0.9</version>
        </dependency>
        <dependency>
          <groupId>org.apache.zookeeper</groupId>
          <artifactId>zookeeper</artifactId>
          <version>3.4.9</version>
          <exclusions>
            <exclusion>
              <groupId>log4j</groupId>
              <artifactId>log4j</artifactId>
            </exclusion>
          </exclusions>
        </dependency>
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.16</version>
        </dependency>
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>3.8.1</version>
               <scope>test</scope>
           </dependency>
        </dependencies>

      ②:实现本地服务类,不需要标记远程服务

      在调用过程中存在数据传输,因此需要转成二进制,因此服务对象需要实现序列化,也就是实现Serializable接口

      ③:以spring配置文件的方式来注册服务

      dubbo-provider.xml

    <?xml version="1.0" encoding="UTF-8"?>
    
      <beans xmlns="http://www.springframework.org/schema/beans"
    
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
    
        xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    
        xsi:schemaLocation="http://www.springframework.org/schema/beans                              http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd">
    
        <dubbo:application name="dubbo-test-provider" owner="sampson"></dubbo:application>
    
        <dubbo:protocol name="dubbo" port="20880"></dubbo:protocol>
    
        <!-- 局域网广播注册中心 -->
    
        <dubbo:registry address="multicast://239.5.6.7:1234" />
    
        <!-- 配置式发布 -->
    
        <bean id="userService" class="cn.itsource.dubbo.provider.service.UserServiceImpl"></bean>
    
        <dubbo:service interface="cn.itsource.dubbo.core.service.IUserService" ref="userService">              </dubbo:service>
    
      <!-- 注解式发布 -->
    
        <!-- 扫描注解包路径,多个包用逗号分隔,不填pacakge表示扫描当前ApplicationContext中所有的类 -->
    
        <dubbo:annotation package="cn.itsource.dubbo.provider.service" />
    
      </beans>

      ④:启动spring,并且加载配置文件,才能发布服务

       启动服务监听

    String configLocation = "classpath*:/dubbo-provider.xml";
    
      ApplicationContext context = new ClassPathXmlApplicationContext(configLocation);
    
      System.out.println("dubbo-server服务正在监听,按任意键退出");
    
      System.in.read();//作用是从键盘读出一个字符,返回unicode编码(数字)此处用来终止程序结束,因为不输出就不会结束

    四、服务消费者实现

      创建服务消费者项目:普通的Maven工程(依赖Dubbo),完成服务调用功能。

      ①:创建项目并导入dubbo.jar

       pom.xml

      

    <dependencies>
           <dependency>
               <groupId>cn.itsource.dubbo.core</groupId>
               <artifactId>dubbo-demo-core</artifactId>
               <version>0.0.1-SNAPSHOT</version>
           </dependency>
           <dependency>
          <groupId>com.alibaba</groupId>
          <artifactId>dubbo</artifactId>
          <version>2.8.4a</version>
        </dependency>
        <dependency>
          <groupId>com.101tec</groupId>
          <artifactId>zkclient</artifactId>
          <version>0.9</version>
        </dependency>
        <dependency>
          <groupId>org.apache.zookeeper</groupId>
          <artifactId>zookeeper</artifactId>
          <version>3.4.9</version>
          <exclusions>
            <exclusion>
              <groupId>log4j</groupId>
              <artifactId>log4j</artifactId>
            </exclusion>
          </exclusions>
        </dependency>
        <dependency>
          <groupId>log4j</groupId>
          <artifactId>log4j</artifactId>
          <version>1.2.16</version>
        </dependency>
        <dependency>
               <groupId>org.springframework</groupId>
               <artifactId>spring-test</artifactId>
               <version>4.1.2.RELEASE</version>
               <scope>test</scope>
           </dependency>
           <dependency>
               <groupId>junit</groupId>
               <artifactId>junit</artifactId>
               <version>3.8.1</version>
               <scope>test</scope>
           </dependency>
        </dependencies>

      ②:通过配置文件对接口的配置获取本地代理对象的代码

      dubbo-consumer.xml 

    <?xml version="1.0" encoding="UTF-8"?>
    
        <beans xmlns="http://www.springframework.org/schema/beans"
    
        xmlns:context="http://www.springframework.org/schema/context"
    
        xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"                                                  xmlns:dubbo="http://code.alibabatech.com/schema/dubbo"
    
        xsi:schemaLocation="http://www.springframework.org/schema/beans 
    
      http://www.springframework.org/schema/beans/spring-beans-2.5.xsd
    
        http://code.alibabatech.com/schema/dubbo http://code.alibabatech.com/schema/dubbo/dubbo.xsd
    
        http://www.springframework.org/schema/context 
    
        http://www.springframework.org/schema/context/spring-context.xsd">
    
        <dubbo:application name="dubbo-test-consumer"></dubbo:application>
    
        <!-- 局域网广播注册中心 -->
    
        <dubbo:registry address="multicast://239.5.6.7:1234" />
    
        <!-- 配置式调用服务 -->
    
        <!-- <dubbo:reference id="helloService" interface="cn.itsource.dubbo.core.service.IHelloService">      </dubbo:reference> -->
    
        <!-- 注解式调用服务 -->
    
        <!-- 扫描注解包路径,多个包用逗号分隔,不填pacakge表示扫描当前ApplicationContext中所有的类 -->
    
        <dubbo:annotation package="cn.itsource.dubbo.consumer" />
    
      </beans>

      ③:给接口产生了本地代理对象,并且把它纳入spring管理

      ④:直接注入代理对象,调用方法完成远程调用

        JUnit4调用dubbo服务测试类

        

    import org.junit.Test;
    
        import org.junit.runner.RunWith;
    
        import org.springframework.test.context.ContextConfiguration;
    
        import org.springframework.test.context.junit4.SpringJUnit4ClassRunner;
    
        import com.alibaba.dubbo.config.annotation.Reference;
    
        importcn.itsource.dubbo.core.service.IHelloService;
    
        @RunWith(SpringJUnit4ClassRunner.class)
    
        @ContextConfiguration({"classpath*:/dubbo-consumer.xml"})
    
        publicclass DubboServiceTest {
    
           @Reference
    
           private IHelloService helloService;
    
           @Test
    
           publicvoid testHello(){
    
              String sayHi = helloService.sayHi("老宋");
              System.out.println(sayHi);
    
       }
    
    }

    五、直连模式

      当消费者和服务者在同一台电脑或者服务器,可以采取直连模式。一般用于本地测试,部署在同一个

    容器将失去微服务架构的优势。

      与之相对的check(检查模式)。例如:A服务启动会依赖于B服务,如果B服务没有启动的情况下,去

    启动A服务。如果check为false启动时不会报错,如果check为true,启动就会报错。

      check:启动检查依赖关系

      服务提供者:

      修改注册中心为:N/A模式(不注册)

    <dubbo:registry address="N/A" check="false"/>

    check,A服务的启动会依赖于B服务。如果B服务没有启动的情况下,去启动A服务。如果checkfalse,启动时不会报错,调用时才报错。如果checktrue,启动时就报错。调试时用false,上线的时为true

    服务消费者:

      修改注册中心为:N/A模式(不注册)

    <dubbo:registry address="N/A" check="false"/>

    配置本地调用地址映射:

    然后在${user.home}/dubbo-resolve.properties文件中配置对应服务调用的本地地址

    ${user.home} 一般代表:C:Users{你当前登录名}

    dubbo-resolve.properties示例

    cn.itsource.dubbo.core.service.IUserService=dubbo://localhost:20880

    cn.itsource.dubbo.core.service.IHelloService=dubbo://localhost:20880

    .....其它服务配置

    六、dubbo服务打包

      ①.   Dubbo服务提供者的运行方式有三种

           通过一个配置文件初始化一个Spring容器。dubbo就会解析配置文件完成对应服务注册。换句话说就是要启动一个Spring

    1、使用Servlet容器(不用)-ContextLoadListener

    利用TomcatJettyWEB容器启动Dubbo服务。

    缺点:增加管理配置的复杂性,不必要地使用http端口,浪费内存资源

    2、JavaMain方法/Test方法中(不建议,本地调试可以用)

    基于Spring框架,写一个Java类并提供Main方法启动。 new ApplicationContext

    缺点:无法使用Dubbo的一些高级特性,服务的管理需要自己额外提供实现

    3、Dubbo框架Main方法项目上线使用

    Dubbo框架本身提供了服务运行支持方法,基于com.alibaba.dubbo.container.Main

    简单高效地运行服务,该类其实就是一个带Main函数的类,该main函数会根据特定路径的配置文件创建一个Spring的容器。

    很好地支持Dubbo服务的发布、关停(ShutdownHook)

     

      ②:Maven编译打包

      <groupId>cn.itsource.service</groupId>

           <artifactId>service-user</artifactId>

           <version>${service-user.version}</version>

           <packaging>jar</packaging>

           <properties>

                  <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>

           </properties>

     

           <!-- 打包jar详细配置 -->

           <build>

                  <!-- jar包名字 -->

                  <finalName>service-user</finalName>

                  <!-- 打包资源配置,如配置文件 -->

                  <resources>

                         <resource>

                                <targetPath>${project.build.directory}/classes</targetPath>

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

                                <filtering>true</filtering>

                                <includes>

                                       <include>**/*.xml</include>

                                       <include>**/*.properties</include>

                                </includes>

                         </resource>

                         <!-- 结合com.alibaba.dubbo.container.Main

                         官方文档:dubbo会自动在classes/META-INF/spring下去加载spring的配置文件

                         因此打包时需要将spring配置文件复制到该目录

                         -->

                         <resource>

                                <targetPath>${project.build.directory}/classes/META-INF/spring</targetPath>

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

                                <filtering>true</filtering>

                                <includes>

                                       <include>spring-dubbo-provider.xml</include>

                                </includes>

                         </resource>

                  </resources>

                 

                  <pluginManagement>

                         <plugins>

                                <!-- 解决Maven插件在Eclipse内执行了一系列的生命周期引起冲突 -->

                                <plugin>

                                       <groupId>org.eclipse.m2e</groupId>

                                       <artifactId>lifecycle-mapping</artifactId>

                                       <version>1.0.0</version>

                                       <configuration>

                                              <lifecycleMappingMetadata>

                                                     <pluginExecutions>

                                                            <pluginExecution>

                                                                   <pluginExecutionFilter>

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

                                                                          <artifactId>maven-dependency-plugin</artifactId>

                                                                          <versionRange>[2.0,)</versionRange>

                                                                          <goals>

                                                                                 <goal>copy-dependencies</goal>

                                                                          </goals>

                                                                   </pluginExecutionFilter>

                                                                   <action>

                                                                          <ignore />

                                                                   </action>

                                                            </pluginExecution>

                                                     </pluginExecutions>

                                              </lifecycleMappingMetadata>

                                       </configuration>

                                </plugin>

                         </plugins>

                  </pluginManagement>

                  <plugins>

                         <!-- 打包jar文件时,配置manifest文件,加入lib包的jar依赖 -->

                         <plugin>

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

                                <artifactId>maven-jar-plugin</artifactId>

                                <configuration>

                                       <classesDirectory>target/classes/</classesDirectory>

                                       <archive>

                                              <manifest>

                                                     <mainClass>com.alibaba.dubbo.container.Main</mainClass>

                                                     <!-- 重要:打包时 MANIFEST.MF文件不记录的时间戳版本 -->

                                                     <useUniqueVersions>false</useUniqueVersions>

                                                     <addClasspath>true</addClasspath>

                                                     <classpathPrefix>lib/</classpathPrefix>

                                              </manifest>

                                              <manifestEntries>

                                                     <Class-Path>.</Class-Path>

                                              </manifestEntries>

                                       </archive>

                                </configuration>

                         </plugin>

                         <plugin>

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

                                <artifactId>maven-dependency-plugin</artifactId>

                                <executions>

                                       <execution>

                                              <id>copy-dependencies</id>

                                              <phase>package</phase>

                                              <goals>

                                                     <goal>copy-dependencies</goal>

                                              </goals>

                                              <configuration>

                                                     <type>jar</type>

                                                     <includeTypes>jar</includeTypes>

                                                     <useUniqueVersions>false</useUniqueVersions>

                                                     <outputDirectory>

                                                            ${project.build.directory}/lib

                                                     </outputDirectory>

                                              </configuration>

                                       </execution>

                                </executions>

                         </plugin>

                  </plugins>

           </build>

           <dependencies>

           </dependencies>

     

      ③:dubbo服务jar包运行

      Cmd窗口:

      1、定位到jar包所在目录

      2、输入命令并回车执行:java -jar xxxxx.jar &

     

      dubbo服务打包是部署dubbo服务的必要方式之一。当执行java -jar时,会自动寻找程序入口(main函数)并运行。

      &保持一致运行。

  • 相关阅读:
    软件性能测试指标及其注意地方
    Oracle过程及函数的参数模式详解
    【转】Web Service单元测试工具实例介绍之SoapUI
    【转】如何读懂Oracle文档中的语法图
    浅谈session测试
    Cookie管理工具
    php 在linux 用file_exists() 函数判断 另外一台服务器映射过来的文件是否存在 总是返回false
    SecureCRT 设置字体跟颜色
    bootstrat 设置 select option 选项的值
    php 如何把中文写入json中 当json文件中还显示的是中文
  • 原文地址:https://www.cnblogs.com/zeussbook/p/10498935.html
Copyright © 2020-2023  润新知