configure interceptor cache

[LukasLohoff]

Description

• enables caching of interceptorrules by adding @Cache annotation
• configures repository queries to use specific query cache

Pull request type

• Bugfix
• Feature
• Dependency updates
• Code style update (formatting, renaming)
• Refactoring (no functional changes, no api changes)
• Build related changes
• Documentation content changes
• Other (please describe)

Do you introduce a breaking change?

• Yes
• No

Checklist

• I understand and agree that the changes in this PR will be licensed under the
  Apache Licence Version 2.0.
• I have followed the guidelines for contributing.
• The proposed change fits to the content of the code of conduct.
• I have added or updated tests and documentation, and the test suite passes (run mvn test locally).
• I have added a screenshot/screencast to illustrate the visual output of my update.

@terrestris/devs Please review

[dnlkoch]

Generally I'm +1, thanks @LukasLohoff!

Just a question: Do we need to apply a custom ehcache.xml for the given cache regions?

[LukasLohoff]

Generally I'm +1, thanks @LukasLohoff!

Just a question: Do we need to apply a custom ehcache.xml for the given cache regions?

Ah yes we probably need a default ehcache.xml file for the interceptor, right?

Or is it enough to add interceptorrule_query and interceptorrules to the existing ehcache.xml?

[LukasLohoff]

@dnlkoch Added a custom ehcache.xml in 86fae48. This ensures only interceptorrules and interceptor queries are cached.

[simonseyock]

very nice!