这里将上两例(生产和消费)优化一下,新建一个父maven模块,让生产和消费依赖父模块,目的一是去掉重复代码,例如DemoProviderService接口;目的二是让父模块的pom来统一管理版本。
如果使用的是eclipse,只要在同一工作空间项目之间就可以依赖,笔者使用的是idea,需要新建module(模块),步骤如下:
1,新建一个maven项目做父模块
2,如图,根据提示,添加新的模块
注:百度网上有直接将其他项目添加为module的,但笔者实验都出现两种错误,一:子模块的pom文件扫描不到;二:在maven project界面整个子模块为灰色,不可用。各位geek若有解决办法,望告知。
3,新建java和resource,将之前的文件复制进来,如图:
4,给生产模块和消费模块的pom文件添加项目依赖,然后删除各自模块的接口,笔者的父依赖如下:
5,给父模块添加需要消费的接口,这样就完成了目的一
6,抽取子模块的pom内容,在父模块pom里定义和版本管理,如下:
<?xml version="1.0" encoding="UTF-8"?> <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>gccDubbo</groupId> <artifactId>gccDubbo</artifactId> <version>1.0-SNAPSHOT</version> <modules> <module>gccDubboProvider</module> <module>gccDubboConsumer</module> </modules> <packaging>pom</packaging> <name>gccDubbo Maven Webapp</name> <!-- 依赖版本管理 --> <properties> <dubbo-demo-api.version>0.0.1-SNAPSHOT</dubbo-demo-api.version> <dubbo.version>2.6.0</dubbo.version> <zkclient.version>0.10</zkclient.version> <curator-framework.version>4.0.1</curator-framework.version> <fastjson.version>1.2.46</fastjson.version> <log4j.version>1.2.17</log4j.version> <slf4j-api.version>1.7.25</slf4j-api.version> <commons-lang3.version>3.4</commons-lang3.version> <netty-all.version>4.0.35.Final</netty-all.version> </properties> <!-- 依赖管理 仅仅定义 --> <dependencyManagement> <dependencies> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> <version>${dubbo.version}</version> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> <version>${zkclient.version}</version> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> <version>${curator-framework.version}</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> <version>${fastjson.version}</version> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> <version>${log4j.version}</version> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> <version>${slf4j-api.version}</version> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> <version>${commons-lang3.version}</version> </dependency> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> <version>${netty-all.version}</version> </dependency> </dependencies> </dependencyManagement> </project>
7,去掉两个子模块的版本,并定义parent依赖,例如:
<?xml version="1.0" encoding="UTF-8"?> <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> <parent> <groupId>gccDubbo</groupId> <artifactId>gccDubbo</artifactId> <version>1.0-SNAPSHOT</version> </parent> <artifactId>gccDubboProvider</artifactId> <name>gccDubboProvider Maven Webapp</name> <dependencies> <dependency> <groupId>gccDubbo</groupId> <artifactId>gccDubbo</artifactId> <version>1.0-SNAPSHOT</version> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>dubbo</artifactId> </dependency> <dependency> <groupId>com.101tec</groupId> <artifactId>zkclient</artifactId> </dependency> <dependency> <groupId>org.apache.curator</groupId> <artifactId>curator-framework</artifactId> </dependency> <dependency> <groupId>com.alibaba</groupId> <artifactId>fastjson</artifactId> </dependency> <dependency> <groupId>log4j</groupId> <artifactId>log4j</artifactId> </dependency> <dependency> <groupId>org.slf4j</groupId> <artifactId>slf4j-api</artifactId> </dependency> <dependency> <groupId>org.apache.commons</groupId> <artifactId>commons-lang3</artifactId> </dependency> <dependency> <groupId>io.netty</groupId> <artifactId>netty-all</artifactId> </dependency> </dependencies> </project>
这样就达到了目的二,版本在父模块的pom同一管理。
这样管理以后,如果有新服务添加,只需要在父模块添加接口,在生产模块完成实现,在消费模块调用即可,不会有代码冗余。