[jira] [Created] (OAK-2382) Move NodeStore implementations to separate modules

["angela (JIRA)" <ji...@apache.org>]

angela created OAK-2382:
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             Summary: Move NodeStore implementations to separate modules
                 Key: OAK-2382
                 URL: https://issues.apache.org/jira/browse/OAK-2382
             Project: Jackrabbit Oak
          Issue Type: Sub-task
            Reporter: angela


as discussed in the oak-call yesterday,  i think we should take another look at the modularization of the oak-core module.

some time ago i proposed to move the NodeStore implementations into separate modules.

to begin with i just tried 2 separate modules:
- oak-ns-document: > everything below oak.plugins.document
- oak-ns-segment: > everything below oak.plugins.segment > segment specific parts of oak.plugins.backup

i found the following issues:
- org.apache.jackrabbit.oak.plugins.cache is not part of the exported packages - oak.plugins.backup contains both public API and implementations without separation - the following test-classes have a hard dependency on one or more ns implementations: > KernelNodeStoreCacheTest > ClusterPermissionsTest > NodeStoreFixture to fix those we could need to be able to run the tests with the individual nodestore modules and move those tests that are just intended to work with a particular impl.

such a move would not only prevent us from introducing unintended package dependencies but would also reduce the number of dependencies present with oak-core. 

as discussed yesterday we may want to pick this up again this year.
see also http://markmail.org/message/6cpbyuthub4jxase for the whole discussion.



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