将 dubbo provider 打包成 jar 包

在使用dubbo框架搭建集群时，如果我们将dubbo打包成可运行的jar包，就能很方便的构架起微服务集群 本文将示例使用maven-shade-plugin插件，将dubbo provider项目打包成一个整体的可运行jar包

1.使用maven创建一个新dubbo provider项目

Eclipse中，点File->New Project...菜单，选择Maven Project，创建artifactId为dubbo-provider-to-jar的项目，修改pom.xml文件内容如下：

<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>alun</groupId> <artifactId>dubbo-provider-to-jar</artifactId> <version>0.0.1-SNAPSHOT</version> <properties> <!-- spring版本号 --> <spring.version>4.3.7.RELEASE</spring.version> </properties> <dependencies> <!-- spring --> <dependency> <groupId>org.springframework</groupId> <artifactId>spring-context-support</artifactId> <version>${spring.version}</version> </dependency> <!-- dubbo依赖 --> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>2.5.3</version> <exclusions> <exclusion> <artifactId>spring</artifactId> <groupId>org.springframework</groupId> </exclusion> </exclusions> </dependency> <dependency> <groupId>org.apache.zookeeper</groupId> <artifactId>zookeeper</artifactId> <version>3.4.6</version> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>0.10</version> </dependency> </dependencies> <build> <finalName>${artifactId}-${version}</finalName> <plugins> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-compiler-plugin</artifactId> <configuration> <source>1.7</source> <target>1.7</target> </configuration> </plugin> <!-- 打成jar包 --> <plugin> <groupId>org.apache.maven.plugins</groupId> <artifactId>maven-shade-plugin</artifactId> <version>2.4.1</version> <configuration> <!-- 是否生成缩减的pom文件，默认不配置是true --> <createDependencyReducedPom>false</createDependencyReducedPom> </configuration> <executions> <execution> <phase>package</phase> <goals> <goal>shade</goal> </goals> <configuration> <transformers> <transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer"> <!-- 启动类 --> <mainClass>mytest.dubbo.Main</mainClass> </transformer> <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"> <resource>META-INF/spring.handlers</resource> </transformer> <transformer implementation="org.apache.maven.plugins.shade.resource.AppendingTransformer"> <resource>META-INF/spring.schemas</resource> </transformer> </transformers> </configuration> </execution> </executions> </plugin> </plugins> </build> </project> 

2.新建启动入口程序mytest.dubbo.Main，内容如下：

package mytest.dubbo; import org.springframework.context.support.ClassPathXmlApplicationContext; public class Main { private static boolean running=true; @SuppressWarnings("resource") public static void main(String[] args) throws Exception { final ClassPathXmlApplicationContext context = new ClassPathXmlApplicationContext(new String[] { "classpath:dubbo-provider.xml" }); Runtime.getRuntime().addShutdownHook(new Thread() { public void run() {
                context.stop();
                System.out.println("dubbo service has stop"); synchronized (Main.class) {
                    running = false;
                    Main.class.notify();
                }
            }
        });
        context.start();
        System.out.println("dubbo service has start"); synchronized (Main.class) { while (running) { try {
                    Main.class.wait();
                } catch (Throwable e) {}
            }
        }
    }
}

3.src/main/resources下新建dubbo-provider.xml配置，如下：

<?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.xsd          
    http://code.alibabatech.com/schema/dubbo 
    http://code.alibabatech.com/schema/dubbo/dubbo.xsd"> <!-- 提供方应用信息，用于计算依赖关系 --> <dubbo:application name="dubbo-service" /> <!-- 使用multicast广播注册中心暴露服务地址 --> <!-- <dubbo:registry address="multicast://224.5.6.7:1234" /> --> <!-- 使用zookeeper注册中心暴露服务地址 --> <dubbo:registry address="zookeeper://127.0.0.1:2181" /> <!-- 用dubbo协议在20880端口暴露服务 --> <dubbo:protocol name="dubbo" port="20880" /> <!-- <dubbo:protocol name="rmi" codec="spring"/> --> <!-- 声明需要暴露的服务接口 --> <dubbo:service interface="mytest.dubbo.service.TestService" ref="testService" /> <!-- 和本地bean一样实现服务 --> <bean id="testService" class="mytest.dubbo.service.impl.TestServiceImpl" /> </beans> 

4.创建对外提供服务接口及实现类，内容如下：

mytest.dubbo.service.TestService：

package mytest.dubbo.service; public interface TestService { String sayHello(String name);
}

mytest.dubbo.service.impl.TestServiceImpl:

package mytest.dubbo.service.impl; import mytest.dubbo.service.TestService; public class TestServiceImpl implements TestService { public String sayHello(String name) { return "Hello "+name;
    }
}

5.使用maven打包项目：

Eclipse项目上点Run As -> Maven build ，Goals栏填package，编译完成后，将在target目录中看到两个jar包及lib目录： dubbo-provider-to-jar-0.0.1-SNAPSHOT.jar 为包含了第三方类库的完整jar包，可单独部署 original-dubbo-provider-to-jar-0.0.1-SNAPSHOT.jar 为不包含第三方类库的jar包，结合lib目录可部署。

cd到target目录，执行java -jar dubbo-provider-to-jar-0.0.1-SNAPSHOT.jar，就能看到已经能成功运行了。