feat(java): Put java and spark libraries within a directory maven-projects to help easily manage and extend the multi-module maven projects

[acezen]

Reason for this PR

Since we would split the java library to multi-module project and spark rely on one of the modules 'info', it's better to put java and spark libraries within a directory. That help easily manage and extend the multi-module maven projects

What changes are included in this PR?

• Put java and spark libraries within a directory maven-project
• Update the related link and document

Are these changes tested?

yes

Are there any user-facing changes?

No

[acezen]

This PR will make the branch-feat-spark-java-info-refactoring branch easily to merge into the main.

[lixueclaire]

LGTM

[acezen]

Hi, @Thespica @SemyonSinchenko, This change is related to Java and Spark, it's better to get some review or advice for the change.

[SemyonSinchenko]

LGTM

[Thespica]

For module in root pom, I consider it should be module name, rather than directory name.

A better solution is unifying the directory name and module names.

incubator-graphar/pom.xml

Line 33 in b33c1f0

<module>java</module>

incubator-graphar/spark/pom.xml

Line 34 in b33c1f0

<artifactId>graphar-spark</artifactId>

incubator-graphar/java/pom.xml

Line 35 in b33c1f0

<artifactId>gar-java</artifactId>

[acezen]

For module in root pom, I consider it should be module name, rather than directory name.

A better solution is unifying the directory name and module names.

incubator-graphar/pom.xml

Line 33 in b33c1f0

<module>java</module>

incubator-graphar/spark/pom.xml

Line 34 in b33c1f0

<artifactId>graphar-spark</artifactId>

incubator-graphar/java/pom.xml

Line 35 in b33c1f0

<artifactId>gar-java</artifactId>

Make sense to me, I will update it to the directory name.

[acezen]

hi, @Thespica, the module name has been unify with directory name.

[Thespica]

LGTM~
Besides, #467 can be closed, right?

[acezen]

LGTM~ Besides, #467 can be closed, right?

yes, #467 is solved by this PR.