How to properly include Java sources in Maven?

Question

I'm working on a very simple blog engine in Java in order to learn multiple technologies.

Tech: Spring IoC, Hibernate, jUnit, GWT, and Maven.

I created two Maven projects: a core project and a GWT project (which has a reference on the core one)

Code is accessible at https://github.com/LaurentT/BlogEngineCore

My goal is the following: I want to include Java sources and XML since my GWT project is going to need the Java sources to compile it into JavaScript.

I tried to use the following code in the <build> element:

     <resources>
        <resource>
            <directory>src/main/java</directory>
            <includes>
                <include>**/*.java</include>
            </includes>
        </resource>
        <resource>
            <directory>src/main/resources</directory>
            <includes>
                <include>**/*.*xml</include>
                <include>**/*.*properties</include>
            </includes>
        </resource>
    </resources>

My jUnit tests used to pass and finish before that add but now they are not even finishing they are hanging...

I have no clue what's going on, so I want to know if there are other ways to include Java sources or if I'm just doing it wrong.

Any clue?

Answer 1

The cleaner maven way would be to attach a separate source jar.

There are standard ways to generate it in your build using the maven source plugin:

<plugin>
  <groupId>org.apache.maven.plugins</groupId>
  <artifactId>maven-source-plugin</artifactId>
  <version>2.2.1</version>
  <executions>
    <execution>
      <id>attach-sources</id>
      <phase>verify</phase>
      <goals>
        <goal>jar-no-fork</goal>
      </goals>
    </execution>
  </executions>
</plugin>

And your GWT project can now reference your core project sources in addition to your core project jar:

<dependency>
  <groupId>your.project</groupId>
  <artifactId>core</artifactId>
  <version>the.same.version</version>
  <classifier>sources</classifier>
  <scope>provided</scope><!-- use for compilation only -->
</dependency>