Monday 27 July 2009

Maven executable JAR skeleton assembly project.

Maven project wizards are ok, but you still end up editing the POM a fair amount to get exactly what you need. It'd be useful just to have some skeleton projects with 90% of what you want ready to go.

Here is the first in a series of maven project skeletons. This project creates an executable JAR and a ZIP assembly to distribute it, along with its dependancies, config files and batch files etc.

The pom.xml includes various report generation plugins and references an assembly configuration, distribution.xml:

pom.xml

<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>org.adrianwalker.maven.skeleton.jar</groupId>
  <artifactId>maven-jar-skeleton</artifactId>
  <packaging>jar</packaging>
  <version>0.1.0</version>
  <name>Maven JAR Skeleton</name>
  <description>Skeleton project for creating executable JARs</description>
  <url>http://www.adrianwalker.org</url>

  <organization>
    <name>adrianwalker.org</name>
    <url>http://www.adrianwalker.org</url>
  </organization>

  <developers>
    <developer>
      <name>Adrian Walker</name>
      <email>ady.walker@gmail.com</email>
      <organization>adrianwalker.org</organization>
      <organizationUrl>http://www.adrianwalker.org</organizationUrl>
    </developer>
  </developers>

  <build>
    <plugins>
      <plugin>
        <artifactId>maven-compiler-plugin</artifactId>
        <configuration>
          <source>1.6</source>
          <target>1.6</target>
        </configuration>
      </plugin>

      <plugin>
        <artifactId>maven-jar-plugin</artifactId>
        <configuration>
          <archive>
            <manifest>
              <addClasspath>true</addClasspath>
              <mainClass>org.adrianwalker.maven.skeleton.jar.Main</mainClass>
            </manifest>
            <manifestEntries>
              <Class-Path>../conf/</Class-Path>
            </manifestEntries>
          </archive>
        </configuration>
      </plugin>

      <plugin>
        <artifactId>maven-assembly-plugin</artifactId>
        <configuration>
          <descriptors>
            <descriptor>src/main/assembly/distribution.xml</descriptor>
          </descriptors>
        </configuration>
        <executions>
          <execution>
            <id>make-assembly</id>
            <phase>package</phase>
            <goals>
              <goal>assembly</goal>
            </goals>
          </execution>
        </executions>
      </plugin>
    </plugins>

    <resources>
      <resource>
        <directory>src/main/resources</directory>
        <excludes>
          <exclude>**/*</exclude>
        </excludes>
      </resource>
    </resources>
  </build>

  <reporting>
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-checkstyle-plugin</artifactId>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-javadoc-plugin</artifactId>
      </plugin>

      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>cobertura-maven-plugin</artifactId>
      </plugin>

      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>jxr-maven-plugin</artifactId>
      </plugin>

      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-pmd-plugin</artifactId>
      </plugin>

      <plugin>
        <groupId>org.codehaus.mojo</groupId>
        <artifactId>findbugs-maven-plugin</artifactId>
      </plugin>
    </plugins>
  </reporting>

  <dependencies>
    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-api</artifactId>
      <version>1.5.6</version>
    </dependency>

    <dependency>
      <groupId>org.slf4j</groupId>
      <artifactId>slf4j-log4j12</artifactId>
      <version>1.5.6</version>
    </dependency>

    <dependency>
      <groupId>log4j</groupId>
      <artifactId>log4j</artifactId>
      <version>1.2.14</version>
    </dependency>

    <dependency>
      <groupId>junit</groupId>
      <artifactId>junit</artifactId>
      <version>3.8.1</version>
      <scope>test</scope>
    </dependency>
  </dependencies>
</project>

distribution.xml

<assembly>
  <id>distribution</id>
  <formats>
    <format>zip</format>
  </formats>

  <files>
    <file>
      <source>/src/main/resources/bin/run.bat</source>
      <outputDirectory>/bin</outputDirectory>
      <filtered>true</filtered>
    </file>
  </files>

  <fileSets>
    <fileSet>
      <directory>/src/main/resources/conf</directory>
      <outputDirectory>/conf</outputDirectory>
      <includes>
        <include>*.properties</include>
      </includes>
    </fileSet>
    <fileSet>
      <directory>/target</directory>
      <outputDirectory>/lib</outputDirectory>
      <includes>
        <include>*.jar</include>
      </includes>
    </fileSet>
  </fileSets>
  
  <dependencySets>
    <dependencySet>
      <outputDirectory>/lib</outputDirectory>
    </dependencySet>
  </dependencySets>
</assembly>

Source Code

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