Maven Notes

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Here are a few notes on the ongoing effort to "Maven-ize" Bigdata. These notes apply to work currently being done in the maven_scaleout branch.


The main goal of the bigdata-integ module is to separate “heavy-weight” tests from the standard unit tests that a developer would run during a typical development cycle. Also included are tests that require some external infrastructure to be set up and torn down(e.g. a lookup service) around the execution of the tests. The term “integration tests” is not particularly accurate and is really a catch-all for anything that we don’t want to be part of the lighter-weight unit tests. As the componentization of Bigdata proceeds, we will see some of these integration tests move back into their respective components but still be separated from the light-weight unit tests. Of course, the unit tests themselves will become part of the components they are meant to test. Maven’s separation of unit and integration tests into separate phases of the build lifecycle makes this fairly straightforward.

To date, we’ve moved only about 30-ish tests and we’ll tackle more going forward.

How to create a new maven project

See Maven in 5 minutes

mvn archetype:generate -DgroupId=com.blazegraph -DartifactId=new-artifact -DarchetypeArtifactId=maven-archetype-quickstart -DinteractiveMode=false

Edit new-artifact/pom.xml and add the lines:


Add the javadoc parameters and repositories:

          <bottom> <![CDATA[<i>Copyright © 2006-2015 SYSTAP, LLC. All Rights Reserved.</i>
  pathClass: 'current',
  cssArrows: false

(i[r].q=i[r].q||[]).push(arguments)},i[r].l=1*new Date();a=s.createElement(o),
ga('create', 'UA-50971023-6', '');
ga('send', 'pageview');


How to run the integration tests

The bigdata-integ module is now referenced in the bigdata parent POM. If you run a build from the parent project, you’ll build bigdata-core, generate its artifacts including the deployment tarball, and run the integration tests. Note that the unit tests are currently not being run during the build, but this should change soon.

mvn clean install

If you’ve already built bigdata-core and just want to run the integration tests, you can run this from the bigdata-integ directory:

cd bigdata-integ
mvn clean integration-test (mvn clean install will also work)

How to not run the integration tests

If you don’t want to run the integration tests, it’s easy. You can:

  • Run the build from the bigdata-core project rather than the parent project.
  • OR from the parent project, add the –DskipITs argument on the command-line (this skips integration tests just as –DskipTests skips unit tests)
  • OR from the parent project, run mvn clean package instead of mvn clean install.

Since the integration-test build phase comes after the package build phase, the integration tests won’t be executed.

Creating a new project with archetype

 mvn -B archetype:generate \
 -DarchetypeGroupId=org.apache.maven.archetypes \
 -DgroupId=com.blazegraph.component \