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首页 / Maven 实用技巧

Maven 实用技巧

宇宙湾 2019-05-16
1036

Maven 提速

多线程

  1. # 用 4 个线程构建，以及根据 CPU 核数每个核分配 1 个线程进行构建
  2. $ mvn -T 4 clean install
  3. $ mvn -T 1C clean install
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跳过测试

  1. -DskipTests               # 不执行测试用例，但编译测试用例类生成相应的 class 文件至 target/test-classes 下
  2. -Dmaven.test.skip=true    # 不执行测试用例，也不编译测试用例类

  4. # 结合上文的`并行执行`
  5. $ mvn -T 1C clean install -Dmaven.test.skip=true

  7. # 如果还是阻塞: 资源管理器 - shutdown all java app

  9. # 如果 jar 包过大，可以下载按照路径放在 repository 中，之后可能还需要 mvn clean 来下载 groovy-all-2.3.11.pom 文件 (mvnrepository.com)
  10. D:\apps\maven\repository\org\codehaus\groovy\groovy-all\2.3.11\groovy-all-2.3.11.jar
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编译失败后，接着编译

  1. # 如果是 Apache Eagle 之类带有几十个子项目的工程，如果从头编译所有的模块，会很耗功夫
  2. # 通过指定之前失败的模块名，可以继续之前的编译
  3. $ mvn -rf :moduleName clean install
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跳过失败的模块，编译到最后再报错

  1. $ mvn clean install --fail-at-end
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使用 Aliyun 国内镜像

  1. <mirror>
  2.   <id>alimaven</id>
  3.   <name>aliyun maven</name>
  4.   <url>http://maven.aliyun.com/nexus/content/groups/public/</url>
  5.   <mirrorOf>central</mirrorOf>
  6. </mirror>
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指定 Repository 目录

  1. <!-- Default: ~/.m2/repository  -->
  2. <localRepository>D:\apps\maven\repository</localRepository>
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如何使用 Maven 编译指定 module

  1. $ mvn install -pl <module_name> -am

  3.   -pl, --projects      (Build specified reactor projects instead of all project)
  4.   -am, --also-make     (If project list is specified, also build projects required by the list)
  5.   -amd, --also-make-dependents    (If project list is specified, also build projects that depend on)
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Maven 标准目录结构

  1. src/main/java             Application/Library sources
  2. src/main/resources        Application/Library resources
  3. src/main/filters          Resource filter files
  4. src/main/webapp           Web application sources
  5. src/test/java             Test sources
  6. src/test/resources        Test resources
  7. src/test/filters          Test resource filter files
  8. src/it                    Integration Tests (primarily for plugins)
  9. src/assembly              Assembly descriptors
  10. src/site                  Site
  11. LICENSE.txt               Project's license
  12. NOTICE.txt                Notices and attributions required by libraries that the project depends on
  13. README.txt                Project's readme
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如何在 Maven 中使用多个 source

  1. <plugin>
  2.   <groupId>org.codehaus.mojo</groupId>
  3.   <artifactId>build-helper-maven-plugin</artifactId>
  4.   <executions>
  5.     <execution>
  6.       <phase>generate-sources</phase>
  7.       <goals>
  8.         <goal>add-source</goal>
  9.       </goals>
  10.       <configuration>
  11.         <sources>
  12.           <source>src/main/scala</source>
  13.         </sources>
  14.       </configuration>
  15.     </execution>
  16.   </executions>
  17. </plugin>
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Using Scala UnitTest by Maven

安装 Scala

Maven 依赖

  1. <dependency>
  2.   <groupId>org.scalatest</groupId>
  3.   <artifactId>scalatest_2.10</artifactId>
  4.   <version>2.2.1</version>
  5. </dependency>
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创建 unittest 需要的 trait

  1. import org.scalatest._
  2. abstract class UnitTestStyle extends FlatSpec
  3. with Matchers with OptionValues with Inside with Inspectors
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编写测试

  1. import spark.streaming.detect.SendNetflow
  2. class SendNetflowTest extends UnitTestStyle {

  4.   "Clean method" should "output a string" in {

  6.     val s = "0,tcp,http,SF,229,9385,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,9,9,0.00,0.00,0.00,0.00,1.00,0.00,0.00,9,90,1.00,0.00,0.11,0.04,0.00,0.00,0.00,0.00,normal."
  7.     SendNetflow.clean(s) should be("0,229,9385,0,0,0,0,0,1,0,0,0,0,0,0,0,0,0,0,9,9,0.00,0.00,0.00,0.00,1.00,0.00,0.00,9,90,1.00,0.00,0.11,0.04,0.00,0.00,0.00,0.00\tnormal.")
  8.   }

  10.   it should "throw Exception if an empty string is inputted" in {
  11.     val emptyS = ""
  12.     a[RuntimeException] should be thrownBy {
  13.     SendNetflow.clean(emptyS)
  14.   }
  15. }
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Tips: Full code is here.

Using slf4j by Maven

Maven 配置

  1. <slf4j.version>1.7.12</slf4j.version>
  2. <logback.version>1.1.3</logback.version>

  4. <dependency>
  5.   <groupId>ch.qos.logback</groupId>
  6.   <artifactId>logback-core</artifactId>
  7.   <version>${logback.version}</version>
  8. </dependency>

  10. <dependency>
  11.   <groupId>ch.qos.logback</groupId>
  12.   <artifactId>logback-classic</artifactId>
  13.   <version>${logback.version}</version>
  14.   <exclusions>
  15.     <exclusion>
  16.       <groupId>ch.qos.logback</groupId>
  17.       <artifactId>logback-core</artifactId>
  18.     </exclusion>
  19.     <exclusion>
  20.       <groupId>org.slf4j</groupId>
  21.       <artifactId>slf4j-api</artifactId>
  22.     </exclusion>
  23.   </exclusions>
  24. </dependency>

  26. <dependency>
  27.   <groupId>org.slf4j</groupId>
  28.   <artifactId>slf4j-api</artifactId>
  29.   <version>${slf4j.version}</version>
  30. </dependency>

  32. <dependency>
  33.   <groupId>org.slf4j</groupId>
  34.   <artifactId>jcl-over-slf4j</artifactId>
  35.   <version>${slf4j.version}</version>
  36.   <exclusions>
  37.     <exclusion>
  38.       <groupId>org.slf4j</groupId>
  39.       <artifactId>slf4j-api</artifactId>
  40.     </exclusion>
  41.   </exclusions>
  42. </dependency>

  44. <dependency>
  45.   <groupId>org.slf4j</groupId>
  46.   <artifactId>log4j-over-slf4j</artifactId>
  47.   <version>${slf4j.version}</version>
  48.   <exclusions>
  49.     <exclusion>
  50.       <groupId>org.slf4j</groupId>
  51.       <artifactId>slf4j-api</artifactId>
  52.     </exclusion>
  53.   </exclusions>
  54. </dependency>

  56. <dependency>
  57.   <groupId>org.slf4j</groupId>
  58.   <artifactId>jul-to-slf4j</artifactId>
  59.   <version>${slf4j.version}</version>
  60.   <exclusions>
  61.     <exclusion>
  62.       <groupId>org.slf4j</groupId>
  63.       <artifactId>slf4j-api</artifactId>
  64.     </exclusion>
  65.   </exclusions>
  66. </dependency>
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logback.xml in resources directory

  1. <?xml version="1.0" encoding="UTF-8"?>
  2. <configuration>
  3.   <!-- %p:Level %m:Message %c.%M:Package+Method %F:%L:File+Line -->
  4.   <property name="pattern" value="%d{yyyy-MM-dd HH:mm:ss.SSS} | %p | %m | %c.%M | %F:%L %n"/>

  6.   <!-- Print in Console -->
  7.   <appender name="STDOUT" class="ch.qos.logback.core.ConsoleAppender">
  8.     <encoder charset="UTF-8">
  9.     <pattern>${pattern}</pattern>
  10.     </encoder>
  11.   </appender>

  13.   <root level="ALL">
  14.     <appender-ref ref="STDOUT"/>
  15.   </root>
  16. </configuration>
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编码

示例
  1. private static final Logger _log = LoggerFactory.getLogger(ZKEventWatch.class);
  2. _log.info(state);
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遇到的坑
SLF4J multi bindings

  • 描述

  1. SLF4J: Class path contains multiple SLF4J bindings.
  2. SLF4J: Found binding in [jar:file:/D:/apps/maven/repository/ch/qos/logback/logback-classic/1.1.3/logback-classic-1.1.3.jar!/org/slf4j/impl/StaticLoggerBinder.class]
  3. SLF4J: Found binding in [jar:file:/D:/apps/maven/repository/org/slf4j/slf4j-log4j12/1.6.1/slf4j-log4j12-1.6.1.jar!/org/slf4j/impl/StaticLoggerBinder.class]
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  • 解决

  1. <!-- 使用 Apache Curator 需要 exclusion slf4j-log4j12，否则会出现问题 -->
  2. <dependency>
  3.   <groupId>org.apache.curator</groupId>
  4.   <artifactId>curator-recipes</artifactId>
  5.   <version>${apache.curator.version}</version>
  6.   <exclusions>
  7.     <exclusion>
  8.       <groupId>org.slf4j</groupId>
  9.       <artifactId>slf4j-log4j12</artifactId>
  10.     </exclusion>
  11.   </exclusions>
  12. </dependency>
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Tips: Full code is here.

导出依赖 Jar

　如何利用 Maven 将依赖的 jar 都导入到一个文件夹下

  1. <build>
  2.   <plugins>
  3.     <plugin>
  4.     <groupId>org.apache.maven.plugins</groupId>
  5.     <artifactId>maven-dependency-plugin</artifactId>
  6.     <version>2.10</version>
  7.     <configuration>
  8.       <outputDirectory>${project.build.directory}/lib</outputDirectory>
  9.       <excludeTransitive>false</excludeTransitive>
  10.       <stripVersion>false</stripVersion>
  11.     </configuration>
  12.     </plugin>
  13.   </plugins>
  14. </build>
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  1. $ mvn clean dependency:copy-dependencies

  3. # 将 yuzhouwan-flume 依赖的 jars 都 导出到一个文件夹
  4. # 用相对路径，不能是 绝对路径，否则 maven 会报错：Unknown lifecycle phase "Java"
  5. $ mvn dependency:copy-dependencies -f yuzhouwan-flume/pom.xml -DoutputDirectory=yuzhouwan-flume/target/lib
  6. $ mvn dependency:copy-dependencies -f yuzhouwan-api/yuzhouwan-admin-api/pom.xml -DoutputDirectory=target/lib
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Profiles

Tips: Full code is here.

日志级别

　-Dorg.slf4j.simpleLogger.defaultLogLevel=error

Generate Code for Antlr

  1. $ mvn clean install -T 1C -DskipTests=true -Dorg.slf4j.simpleLogger.defaultLogLevel=error -B
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Maven Properties

  1. $ mvn clean install -Dmy.property=propertyValue
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Maven Check Style

  1. $ mvn clean install -Dcheckstyle.skip
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Maven Update

  1. $ mvn clean install -U
  2. # -U means force update of dependencies.
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Maven Dependency

Pre-download

  1. $ mvn dependency:go-offline
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Version-compare

  1. # 在开发一些 Coprocessor 的时候，需要保证和 HBase 集群的依赖 jar 版本一致，可以使用该方法
  2. $ mvn versions:compare-dependencies -DremotePom=org.apache.hbase:hbase:0.98.8-hadoop2 -DreportOutputFile=depDiffs.txt
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Maven Proxy

命令行设置

  1. # Linux (bash)
  2. $ export MAVEN_OPTS="-DsocksProxyHost=10.10.10.10 -DsocksProxyPort=8080"
  3. # Windows
  4. $ set MAVEN_OPTS="-DsocksProxyHost=10.10.10.10 -DsocksProxyPort=8080"
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配置文件

  1. $ vim $MAVEN_HOME/conf/settings.xml

  3.   <proxies>
  4.     <!--<proxy>
  5.       <id>http-proxy</id>
  6.       <active>true</active>
  7.       <protocol>http</protocol>
  8.       <host>10.10.10.10</host>
  9.       <port>8888</port>
  10.       <nonProxyHosts>*.yuzhouwan.com</nonProxyHosts>
  11.     </proxy>-->

  13.     <proxy>
  14.       <id>socks-proxy</id>
  15.       <active>true</active>
  16.       <protocol>socks5</protocol>
  17.       <host>127.0.0.1</host>
  18.       <port>1080</port>
  19.       <nonProxyHosts>*.yuzhouwan.com</nonProxyHosts>
  20.     </proxy>
  21.   </proxies>
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Avro 插件

创建 avsc 文件

  1. {
  2.   "namespace": "com.yuzhouwan.hacker.avro",
  3.   "type": "record",
  4.   "name": "User",
  5.   "fields": [
  6.     {
  7.       "name": "name",
  8.       "type": "string"
  9.     },
  10.     {
  11.       "name": "favorite_number",
  12.       "type": [
  13.         "int",
  14.         "null"
  15.       ]
  16.     },
  17.     {
  18.       "name": "favorite_color",
  19.       "type": [
  20.         "string",
  21.         "null"
  22.       ]
  23.     }
  24.   ]
  25. }
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使用 avro-tools 工具生成 Avro 类

  1. # 下载 avro-tools
  2. # https://mvnrepository.com/artifact/org.apache.avro/avro-tools/1.8.1
  3. # http://archive.apache.org/dist/avro/avro-1.8.1/java/                    (better)
  4. $ wget http://archive.apache.org/dist/avro/avro-1.8.1/java/avro-tools-1.8.1.jar -c avro-tools-1.8.1.jar

  6. # 利用 avsc 文件中的 Schema 生成 Avro 类
  7. $ java -jar avro-tools-1.8.1.jar compile schema user.avsc .
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使用 avro-plugin 插件生成 Avro 类

  1. <properties>
  2.   <apache.avro.version>1.7.7</apache.avro.version>
  3. </properties>

  5. <dependencies>
  6.   <!-- apache avro -->
  7.   <dependency>
  8.     <groupId>org.apache.avro</groupId>
  9.     <artifactId>avro</artifactId>
  10.     <version>${apache.avro.version}</version>
  11.   </dependency>
  12. </dependencies>

  14. <build>
  15.   <plugins>
  16.     <plugin>
  17.       <groupId>org.apache.avro</groupId>
  18.       <artifactId>avro-maven-plugin</artifactId>
  19.       <version>${apache.avro.version}</version>
  20.       <executions>
  21.         <execution>
  22.           <phase>generate-sources</phase>
  23.           <goals>
  24.             <goal>schema</goal>
  25.           </goals>
  26.           <configuration>
  27.             <sourceDirectory>${project.basedir}/src/main/resources/avsc/</sourceDirectory>
  28.             <outputDirectory>${project.basedir}/src/main/java/</outputDirectory>
  29.           </configuration>
  30.         </execution>
  31.       </executions>
  32.     </plugin>
  33.   </plugins>
  34. </build>
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Tips: Full code is here.

Shade 插件解决 Jar 多版本共存

适用场景

　在整合大型项目时，可能都依赖 commons-collections 此类的工具包，但是也可能 commons-collections 的版本却因为不一致，导致冲突。可以通过 Shade 插件的 relocation
方法进行重定向，此时冲突的依赖 package 名，会被重命名，并且依赖该 jar 的程序，都会被自动替换为新的 package 名

基本用法

实例一
  1. <properties>
  2.     <maven.shade.plugin.version>2.4.3</maven.shade.plugin.version>
  3. </properties>
  4. <plugin>
  5.     <groupId>org.apache.maven.plugins</groupId>
  6.     <artifactId>maven-shade-plugin</artifactId>
  7.     <version>2.4.3</version>
  8.     <executions>
  9.         <execution>
  10.             <phase>package</phase>
  11.             <goals>
  12.                 <goal>shade</goal>
  13.             </goals>
  14.             <configuration>
  15.                 <shadedArtifactAttached>false</shadedArtifactAttached>
  16.                 <createSourcesJar>true</createSourcesJar>
  17.                 <artifactSet>
  18.                     <excludes>
  19.                         <exclude>org.mapdb.*</exclude>
  20.                     </excludes>
  21.                 </artifactSet>
  22.                 <relocations>
  23.                     <relocation>
  24.                         <pattern>org.apache.commons.collections</pattern>
  25.                         <shadedPattern>com.yuzhouwan.org.apache.commons.collections</shadedPattern>
  26.                     </relocation>
  27.                 </relocations>
  28.             </configuration>
  29.         </execution>
  30.     </executions>
  31. </plugin>
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实例二
  1. <plugin>
  2.     <groupId>org.apache.maven.plugins</groupId>
  3.     <artifactId>maven-shade-plugin</artifactId>
  4.     <version>${maven.shade.plugin.version}</version>
  5.     <executions>
  6.         <execution>
  7.             <phase>package</phase>
  8.             <goals>
  9.                 <goal>shade</goal>
  10.             </goals>
  11.             <configuration>
  12.                 <shadedArtifactAttached>true</shadedArtifactAttached>
  13.                 <shadedClassifierName>all</shadedClassifierName>
  14.                 <createSourcesJar>true</createSourcesJar>
  15.                 <artifactSet>
  16.                     <!-- 因为 org.glassfish 里面存在类似 public static class Builder implements javax.ws.rs.client.Invocation.Builder 全限定名的写法 -->
  17.                     <!-- 所以只能用 shade 去隐藏 com.sun.jersey -->
  18.                     <excludes>
  19.                         <exclude>org.glassfish.*</exclude>
  20.                     </excludes>
  21.                 </artifactSet>
  22.                 <relocations>
  23.                     <relocation>
  24.                         <pattern>javax.ws</pattern>
  25.                         <shadedPattern>shade.javax.ws</shadedPattern>
  26.                     </relocation>
  27.                     <relocation>
  28.                         <pattern>org.apache.curator</pattern>
  29.                         <shadedPattern>shade.org.apache.curator</shadedPattern>
  30.                     </relocation>
  31.                     <!--<relocation>
  32.                         <pattern>org.glassfish</pattern>
  33.                         <shadedPattern>shade.org.glassfish</shadedPattern>
  34.                     </relocation>
  35.                     <relocation>
  36.                         <pattern>com.sun.jersey</pattern>
  37.                         <shadedPattern>shade.com.sun.jersey</shadedPattern>
  38.                     </relocation>-->
  39.                 </relocations>
  40.             </configuration>
  41.         </execution>
  42.     </executions>
  43. </plugin>
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踩过的坑

Error creating shaded jar: Error in ASM processing class
描述
  1. Failed to execute goal org.apache.maven.plugins:maven-shade-plugin:2.1:shade (default) on project base-k2d-flow: Error creating shaded jar: Error in ASM processing class com/yuzhouwan/bigdata/k2d/K2DPartitioner.class: 52264 -> [Help 1]
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解决

　升级 maven-shade-plugin
版本到 2.4.x

通过 Shade 将问题解决后，部署上线后，依赖冲突复现
解决

　因为官方明确指出 java.io.File.listFiles()
方法返回的文件序列顺序，是不做保证的。所以，上线后运行环境发生变化，加载 lib
目录下的 jar包
顺序，可能会发生变化。这时候，就需要利用不同 lib
目录，并修改 classpath 的方式，将 jar包
加载顺序确定下来

　例如，在整合 Druid 这类依赖树比较庞大的工程，就遇到了这么一种情况。Druid 中 com.sun.jersey (1.19) 和 Dataflow 中 org.glassfish.jersey (2.25.1) 发生冲突。增加了上述实例二中的 Shade 操作仍然会在线上环境，复现依赖冲突。这时，我们可以通过增加一个 lib_jersey
目录，存放 javax.ws.rs-api-2.1.jar
，并修改 classpath 为 lib_jersey/*:lib/*
。以此，保证了 lib_jersey
中的依赖得以优先加载，从而解决冲突

Assembly 插件

不同模块的依赖，打包到不同的目录下

具体步骤

　第一步，先在负责打包分发的 distribution 模块中，设置 pom.xml 文件

  1. <properties>
  2.     <maven.assembly.plugin.version>2.3</maven.assembly.plugin.version>
  3. </properties>

  5. <packaging>pom</packaging>

  7. <dependencies>
  8.     <dependency>
  9.         <groupId>com.yuzhouwan</groupId>
  10.         <artifactId>core</artifactId>
  11.     </dependency>
  12.     <dependency>
  13.         <groupId>com.yuzhouwan</groupId>
  14.         <artifactId>ai</artifactId>
  15.     </dependency>
  16.     <dependency>
  17.         <groupId>com.yuzhouwan</groupId>
  18.         <artifactId>bigdata</artifactId>
  19.     </dependency>
  20. </dependencies>

  22. <build>
  23.     <plugins>
  24.         <plugin>
  25.             <artifactId>maven-assembly-plugin</artifactId>
  26.             <version>${maven.assembly.plugin.version}</version>
  27.             <executions>
  28.                 <execution>
  29.                     <id>assemble</id>
  30.                     <phase>package</phase>
  31.                     <goals>
  32.                         <goal>single</goal>
  33.                     </goals>
  34.                     <configuration>
  35.                         <descriptors>
  36.                             <descriptor>src/assembly/bin.xml</descriptor>
  37.                             <descriptor>src/assembly/src.xml</descriptor>
  38.                         </descriptors>
  39.                         <tarLongFileMode>gnu</tarLongFileMode>
  40.                     </configuration>
  41.                 </execution>
  42.             </executions>
  43.         </plugin>
  44.     </plugins>
  45. </build>
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　第二步，创建好对应的 bin.xml 和 src.xml

  1. <assembly xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  2.           xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
  3.           xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">

  5.     <id>bin</id>

  7.     <formats>
  8.         <format>dir</format>
  9.         <format>tar.gz</format>
  10.     </formats>

  12.     <baseDirectory>yuzhouwan-${project.version}-bin</baseDirectory>

  14.     <fileSets>
  15.         <fileSet>
  16.             <directory>../</directory>

  18.             <excludes>
  19.                 <exclude>**/target/**</exclude>
  20.                 <exclude>**/.classpath</exclude>
  21.                 <exclude>**/.project</exclude>
  22.                 <exclude>**/.settings/**</exclude>
  23.                 <exclude>lib/**</exclude>
  24.                 <exclude>conf/**</exclude>
  25.             </excludes>

  27.             <includes>
  28.                 <include>README</include>
  29.                 <include>LICENSE</include>
  30.                 <include>NOTICE</include>
  31.                 <include>CHANGELOG</include>
  32.                 <include>RELEASE-NOTES</include>
  33.                 <include>conf/</include>
  34.             </includes>
  35.         </fileSet>

  37.         <fileSet>
  38.             <directory>../</directory>
  39.             <includes>
  40.                 <include>bin/yuzhouwan-cli.sh</include>
  41.             </includes>
  42.             <fileMode>0777</fileMode>
  43.             <directoryMode>0755</directoryMode>
  44.         </fileSet>
  45.     </fileSets>

  47.     <moduleSets>
  48.         <moduleSet>
  49.             <includeSubModules>false</includeSubModules>
  50.             <useAllReactorProjects>true</useAllReactorProjects>
  51.             <includes>
  52.                 <include>com.yuzhouwan:yuzhouwan-core</include>
  53.             </includes>
  54.             <excludes>
  55.                 <exclude>com.yuzhouwan:ai</exclude>
  56.                 <exclude>com.yuzhouwan:bigdata</exclude>
  57.             </excludes>
  58.             <binaries>
  59.                 <outputDirectory>lib/core</outputDirectory>
  60.                 <unpack>false</unpack>
  61.                 <dependencySets>
  62.                     <dependencySet>
  63.                         <useProjectArtifact>false</useProjectArtifact>
  64.                         <useTransitiveDependencies>true</useTransitiveDependencies>
  65.                         <unpack>false</unpack>
  66.                         <excludes>
  67.                             <exclude>com.yuzhouwan:ai</exclude>
  68.                             <exclude>com.yuzhouwan:bigdata</exclude>
  69.                         </excludes>
  70.                     </dependencySet>
  71.                 </dependencySets>
  72.             </binaries>
  73.         </moduleSet>

  75.         <moduleSet>
  76.             <includeSubModules>false</includeSubModules>
  77.             <useAllReactorProjects>true</useAllReactorProjects>
  78.             <includes>
  79.                 <include>com.yuzhouwan:ai</include>
  80.             </includes>
  81.             <excludes>
  82.                 <exclude>com.yuzhouwan:bigdata</exclude>
  83.             </excludes>
  84.             <binaries>
  85.                 <outputDirectory>lib/plugins/ai</outputDirectory>
  86.                 <unpack>false</unpack>
  87.                 <dependencySets>
  88.                     <dependencySet>
  89.                         <useProjectArtifact>false</useProjectArtifact>
  90.                         <useTransitiveDependencies>true</useTransitiveDependencies>
  91.                         <unpack>false</unpack>
  92.                         <excludes>
  93.                             <exclude>com.yuzhouwan:bigdata</exclude>
  94.                         </excludes>
  95.                     </dependencySet>
  96.                 </dependencySets>
  97.             </binaries>
  98.         </moduleSet>

  100.         <moduleSet>
  101.             <includeSubModules>false</includeSubModules>
  102.             <useAllReactorProjects>true</useAllReactorProjects>
  103.             <includes>
  104.                 <include>com.yuzhouwan:bigdata</include>
  105.             </includes>
  106.             <excludes>
  107.                 <exclude>com.yuzhouwan:ai</exclude>
  108.             </excludes>
  109.             <binaries>
  110.                 <outputDirectory>lib/plugins/bigdata</outputDirectory>
  111.                 <unpack>false</unpack>
  112.                 <dependencySets>
  113.                     <dependencySet>
  114.                         <useProjectArtifact>false</useProjectArtifact>
  115.                         <useTransitiveDependencies>true</useTransitiveDependencies>
  116.                         <unpack>false</unpack>
  117.                         <excludes>
  118.                             <exclude>com.yuzhouwan:ai</exclude>
  119.                         </excludes>
  120.                     </dependencySet>
  121.                 </dependencySets>
  122.             </binaries>
  123.         </moduleSet>
  124.     </moduleSets>
  125. </assembly>
复制
  1. <assembly xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  2.           xmlns="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2"
  3.           xsi:schemaLocation="http://maven.apache.org/plugins/maven-assembly-plugin/assembly/1.1.2 http://maven.apache.org/xsd/assembly-1.1.2.xsd">

  5.     <id>src</id>

  7.     <formats>
  8.         <format>dir</format>
  9.         <format>tar.gz</format>
  10.     </formats>

  12.     <baseDirectory>yuzhouwan-${project.version}-src</baseDirectory>

  14.     <fileSets>
  15.         <fileSet>
  16.             <directory>../</directory>

  18.             <excludes>
  19.                 <exclude>**/target/**</exclude>
  20.                 <exclude>**/.classpath</exclude>
  21.                 <exclude>**/.project</exclude>
  22.                 <exclude>**/*.iml</exclude>
  23.                 <exclude>**/.settings/**</exclude>
  24.                 <exclude>lib/**</exclude>
  25.             </excludes>

  27.             <includes>
  28.                 <include>.ci</include>
  29.                 <include>.gitignore</include>
  30.                 <include>DEVNOTES</include>
  31.                 <include>README</include>
  32.                 <include>LICENSE</include>
  33.                 <include>NOTICE</include>
  34.                 <include>CHANGELOG</include>
  35.                 <include>RELEASE-NOTES</include>
  36.                 <include>bin/**</include>
  37.                 <include>conf/**</include>
  38.                 <include>native/**</include>
  39.                 <include>pom.xml</include>
  40.                 <include>dev-conf/**</include>
  41.                 <include>yuzhouwan-core/**</include>
  42.                 <include>yuzhouwan-ai/**</include>
  43.                 <include>yuzhouwan-bigdata/**</include>
  44.             </includes>
  45.         </fileSet>
  46.     </fileSets>
  47. </assembly>
复制

　构建完成之后，即可看到 yuzhouwan-ai
和 yuzhouwan-bigdata
模块的依赖，分别被打包到了 plugins/ai
和 plugins/bigdata
目录下

  1. # 需要预先安装 tree 命令（yum install tree -y）
  2. $ tree
  3.   .
  4.   ├── bin
  5.   │   └── yuzhouwan-cli.sh
  6.   └── lib
  7.       ├── core
  8.       └── plugins
  9.           ├── ai
  10.           └── bigdata
复制
踩过的坑
模块间存在版本冲突的 jar 包

  • 问题描述

  1. Currently, inclusion of module dependencies may produce unpredictable results if a version conflict occurs
复制


  • 解决

    如果上述 yuzhouwan-ai
    和 yuzhouwan-bigdata
    模块，与 yuzhouwan-common
    模块存在版本冲突的 jar 包，则需要将 bin.xml
    拆解成 bin-common.xml
    、 bin-ai.xml
    和 bin-bigdata.xml
    三个 assembly 配置文件，依次进行构建（此时需要将 id 设置成一样的，不然会被构建到不同的目录下）。否则，版本冲突的 jar 包，将只能保留其中一个版本，且具体保留哪个版本是不确定的



数据库
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