Maven
Summary
Notes on the Maven build system.
Artifacts
Über JARs
There are many ways to build über JARs, but we will talk about two, maven-assembly-plugin and maven-shade-plugin.
Assembly
The maven-assembly-plugini 1 adds all dependencies inside the final fat JAR and can be used by adding the following to your pom.xml:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-assembly-plugin</artifactId>
<configuration>
<descriptorRefs>
<descriptorRef>jar-with-dependencies</descriptorRef>
</descriptorRefs>
<archive>
<manifest>
<mainClass>{your.package.main.class}</mainClass>
</manifest>
</archive>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>single</goal>
</goals>
</execution>
</executions>
</plugin>
Shade
The maven-shade-plugin 2 also adds all dependencies inside the final fat JAR, but additionally executes shading.
Add the following to your pom.xml:
<plugin>
<groupId>org.apache.maven.plugins</groupId>
<artifactId>maven-shade-plugin</artifactId>
<configuration>
<transformers>
<transformer implementation="org.apache.maven.plugins.shade.resource.ManifestResourceTransformer">
<mainClass>{your.package.main.class}</mainClass>
</transformer>
</transformers>
</configuration>
<executions>
<execution>
<phase>package</phase>
<goals>
<goal>shade</goal>
</goals>
</execution>
</executions>
</plugin>