tree 117af326e0c37f5d896787825e50a94bd855d745
parent 2a9020abdb6aba80d17795336c6f47c1bb968f26
author Luca Milanesio <luca.milanesio@gmail.com> 1529360785 +0100
committer Marco Miller <marco.miller@ericsson.com> 1547833855 -0500

Minimize use of ReviewDb when not needed

When all changes have been migrated to NoteDb, do not open ReviewDb
anymore. Opening ReviewDb when not needed would only cause more
contention on the DB Pool and cause problems to the active threads.

The only point where we need to "mimic" a minimum of functionality
is when a ChangeNote is retrieved: just return a null element so
that Gerrit can get the entire data from the Git repository, avoiding
stale indexing.

Bug: Issue 9302
Change-Id: I8b0ba81ef16c546852c0d93f27bb8abb46c034f9