Commits on Dec 16, 2023

1. Synchronize on the manager in RepositoryHelper#createMemoryComposite …

   Currently the RepositoryHelper#createMemoryComposite uses the current
   time millis to generate a "unique" URI, but this has several issues:
   
   Two threads can enter the method at the same time and then see that this
   "unique" id is currently not taken and then get the same id.
   It can even happen that both try to create them at the same time, what
   then will result in a provision exception what will return null and
   results in no composite created at all.
   
   This do the following to mitigate this:
   - uses a UUID instead of timestamp where collisions are already unlikely
   - synchronize on the manager for the time of test/create the repository

   

   laeubi committed Dec 16, 2023
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