Dubbox應用部署運作

Dubbox服務部署運作的三種方式：

一、使用Servlet容器（Tomcat、Jetty等）加載dubbo配置檔案運作

缺點：占用端口、浪費資源（記憶體）、無法使用dubbo的一些進階特性

二、自建Main函數（通過Spring容器）加載dubbo配置檔案

缺點：無法使用dubbo的一些進階特性、自己編寫啟動類可能有缺陷

三、Dubbo架構提供的Main方法類來運作

• 約定優于配置，使用（com.alibaba.dubbo.container.Main）啟動會自動加載classpath*:META-INF/spring下的配置檔案
• 可實作優雅關機（ShutdownHook）
• 服務容器的加載内容可以擴充，内置了spring, jetty, log4j等加載，可通過Container擴充點進行擴充

四、Maven建構Dubbo服務可執行Jar包的配置

<build>
        <resources>
            <resource>
                <targetPath>${project.build.directory}/classes</targetPath>
                <directory>src/main/resources</directory>
                <filtering>true</filtering>
                <includes>
                    <include>**/*.xml</include>
                    <include>**/*.properties</include>
                </includes>
            </resource>
            <!-- 結合com.alibaba.dubbo.container.Main -->
            <resource>
                <targetPath>${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>
        <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>
                </configuration>
            </plugin>
            <plugin>
                <artifactId>maven-surefire-plugin</artifactId>
                <version>2.6</version>
                <configuration>
                    <skip>true</skip>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-resources-plugin</artifactId>
                <version>2.7</version>
                <configuration>
                    <encoding>UTF-8</encoding>
                </configuration>
            </plugin>
            <plugin>
                <groupId>org.apache.maven.plugins</groupId>
                <artifactId>maven-shade-plugin</artifactId>
                <version>1.4</version>
                <executions>
                    <execution>
                        <phase>package</phase>
                        <goals>
                            <goal>shade</goal>
                        </goals>
                        <configuration>
                            <transformers>
                                <transformer
                                        implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
                                    <mainClass><!-- Dubbox啟動類路徑 --></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>