Concepts (open for discussion)

Requirements

• Maven >= 3.3.1
• Java >= 8

General

• All modules should use only one primary build system
• It should be super-easy for new contributors to get started (A new contributor should be able to checkout and build with a core testsuite with a simple: ‘mvn package’ run)
• New code should only be accepted, if there are tests (Currently the java part of the build is configured to fail if the code coverage is below 90%)

Java Specific

• Development should be done in Java 8
• Providing Java 7 compatible versions should be possible by using the retrolambda plugin
  • Usage of default implementations does cause more problems than it solves in this case.

IDE specific

• For formatting there is a .editorconfig defined. Intellij Idea come with a plugin for this pre-installed, for eclipse an installation is required (http://editorconfig.org/).
• Import organizing uses the Intellij Idea default:
  • Import order
    • all other imports
    • blank
    • import javax.*
    • import java.*
    • blank
    • all other static imports
  • Star imports
    • number of imports needed for .* = 5
    • number of static-imports needed for .* = 3