使用maven构建dubbo服务jar包

服务器:192.168.1.121(edu-provider-01)

一、Dubbo服务的运行方式：

1、使用Servlet容器运行（Tomcat、Jetty等）----不可取 缺点：增加复杂性（端口、管理）

tomcat/jetty等占用端口,dubbo服务也需要端口

浪费资源（内存）:单独启动tomcat,jetty占用内存大

2、自建Main方法类来运行（spring容器） ----不建议（本地调试可用） 

缺点： Dobbo本身提供的高级特性没用上
自已编写启动类可能会有缺陷

3、使用Dubbo框架提供的Main方法类来运行（Spring容器）----建议使用 优点：框架本身提供（com.alibaba.dubbo.container.Main）

可实现优雅关机（ShutdownHook）

注意点

spring-context.xml 

<import resource="classpath:spring/xxx.xml" />

官方：服务容器的加载内容可以扩展，内置了spring, jetty, log4j等加载，可通过Container扩展点进行扩展

Dubbo是通过JDK的ShutdownHook来完成优雅停机的，所以如果用户使用"kill -9 PID"等强制关闭指令，是不会执行优雅停机的，只有通过"kill PID"时，才会执行。

原理：

服务提供方停止时，先标记为不接收新请求，新请求过来时直接报错，让客户端重试其它机器。 然后，检测线程池中的线程是否正在运行，如果有，等待所有线程执行完成，除非超时，则强制关闭。

服务消费方停止时，不再发起新的调用请求，所有新的调用在客户端即报错。然后，检测有没有请求的响应还没有返回，等待响应返回，除非超时，则强制关闭。

二、Maven构建Dubbo服务可执行Jar包的配置

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<span style="font-size:14px;"><!--MAVEN打包duboo可执行jar begin -->  

    <build>  

        <finalName>edu-service-user</finalName>  

  

        <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 -->  

            <resource>  

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

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

                <filtering>true</filtering>  

                <includes>  

                    <include>spring-context.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>  

                                          

                                        <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>  

                            <!-- 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>  

<!--MAVEN打包duboo可执行jar end --></span>  

三、可执行Dubbo服务Jar在linux上的操作

1.获取数据库密码密文，使用druid

上传druid-0.2.23.jar包到provider-01服务器192.168.1.121上，使用 Java -cp
druid-0.2.23.jar com.alibaba.druid.filter.config.ConfigTools root获取加密的密码

[root@provider-01 ~]# java -cp druid-0.2.23.jar com.alibaba.druid.filter.config.ConfigTools root
bNVOqb7WKLX5Bjnw+LMv92taj25KOxDimXxILPQjw42wgv+1lHzOH8kr97xDwWdhpY67

QuYCS7sWN4W46YbkFA==

[root@provider-01 ~]# 



2.打包provider提供者服务jar





3.把edu-service-user.jar与其lib上传到provider-01服务器上

[root@provider-01 home]# mkdir /home/yxq/edu/service

[root@provider-01 home]# mkdir /home/yxq/edu/service/user



4.手动执行jar

启动zookeeper注册中心192.168.1.121

[root@provider-01 user]# ls

edu-service-user.jar  lib

[root@provider-01 user]# java -jar edu-service-user.jar 



dubbo管理控制台



[root@provider-01 user]# ps -ef | grep edu-service

root      12391  11678  1 06:46 pts/0    00:00:08 java -jar edu-service-user.jar

root      12423  11678  0 06:59 pts/0    00:00:00 grep edu-service

[root@provider-01 user]# kill 12391

手工维护Dubbo服务 

java -jar edu-service-xxx.jar & 

kill PID 

kill -9 PID