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Building and Testing REEF Java

Prerequisites

  • Java Development Kit 7 or 8. Make sure that $JAVA_HOME points to it.
  • Apache Maven 3.3 or newer. Make sure that mvn is in your $PATH and $M2_HOME points to its installation.
  • Protocol Buffers Compiler version 2.5. Make sure that protoc is on your PATH.

Build Instructions

The Java side of REEF is built using Apache Maven. To build and run tests, execute:

mvn clean install

To perform build alone without tests in a multithreaded mode, execute

mvn -TC1 -DskipTests clean install

To perform "fast" build, which skips tests and all code quality enforcement tools, execute:

mvn clean install -DskipTests -TC1 -P!code-quality

Test Instructions

To run tests separately on local runtime, execute:

mvn test

Note that the tests will take several minutes to complete. You will also see stack traces fly by. Not to worry: those are part of the tests that test REEF's error reporting.

Code Quality Enforcement Tools

Java build incorporates several code quality tools:

  • Apache RAT verifies that Apache headers are in place where needed. To run this check separately, execute:

    mvn apache-rat:check

  • Checkstyle verifies that all Java code adheres to a coding standard. To run this check separately, execute:

    mvn checkstyle:checkstyle

    Per-project Checkstyle reports can be found at \<project>\target\site\checkstyle.html. Violations which caused the build break will show up as errors and need to be fixed; violations which show up as warnings or info can be ignored.

  • Findbugs looks for potential bugs in Java code, and can fail the build if any high-priority warnings are found. To run this check separately, execute:

    mvn findbugs:check xml:transform

    Per-project Findbugs reports can be found at \<project>\target\findbugs\findbugsXml.html.