dubbo的启动方法

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） 浪费资源（内存）
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/spring-xxx.xml" />

一、服务的启动方式：servelet容器过于庞大，占用资源。
二、main方法在本地用的比较普遍，本地开发调试，单元测试，要掌握，不建议生产使用。
三、dubbo提供的启动类：建议使用dubbo服务自带的启动类，好处是优雅关机，避免强行关闭导致数据丢失。

以下是dubbo服务的打包及启动配置，打出jar包的服务：

<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>
                                        <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>
                            <!-- 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>

五、启动jar包，定位到相应的目录下，执行  java -jar edu-service-user.jar &

修改spring-context.xml文件中对另外两个文件的引用路径：前面加上classpath:spring/spring-mybatis.xml

六、当然了，我们的服务是war包，直接部署在tomcat就ok了。配置如下：

<build>
    <finalName>****-service</finalName>
    <resources>
        <resource>
            <targetPath>${project.build.directory}/classes</targetPath>
            <directory>src/main/resources</directory>
            <filtering>true</filtering>
            <includes>
                <include>**/*</include>
            </includes>
        </resource>
        <!-- 结合com.alibaba.dubbo.container.Main -->
        <resource>
            <targetPath>${project.build.directory}/classes/META-INF/spring</targetPath>
            <directory>src/main/resources/spring</directory>
            <filtering>true</filtering>
            <includes>
                <include>spring.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>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-compiler-plugin</artifactId>
            <version>3.1</version>
            <configuration>
                <source>1.8</source>
                <target>1.8</target>
                <encoding>UTF-8</encoding>
                <compilerArgs>
                    <arg>-extdirs</arg>
                    <arg>${project.basedir}/src/main/webapp/WEB-INF/lib</arg>
                </compilerArgs>
            </configuration>
        </plugin>
        <plugin>
            <groupId>org.apache.maven.plugins</groupId>
            <artifactId>maven-war-plugin</artifactId>
            <version>2.6</version>
            <configuration>
                <warName>****</warName>
                <archive>
                    <addMavenDescriptor>false</addMavenDescriptor>
                </archive>
            </configuration>
        </plugin>
    </plugins>
</build>