Chetan Mehrotra created OAK-4655:
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             Summary: Enable configuring multiple segment nodestore in same 
setup
                 Key: OAK-4655
                 URL: https://issues.apache.org/jira/browse/OAK-4655
             Project: Jackrabbit Oak
          Issue Type: Improvement
          Components: segment-tar, segmentmk
            Reporter: Chetan Mehrotra
             Fix For: 1.6


With OAK-4369 and OAK-4490 its now possible to configure a new SegmentNodeStore 
to act as secondry nodestore (OAK-4180). Recently for few other features we see 
a requirement to configure a SegmentNodeStore just for storage purpose. For e.g.

# OAK-4180 - Enables use of SegmentNodeStore as a secondary store to compliment 
DocumentNodeStore
#* Always uses BlobStore from primary DocumentNodeStore
#* Compaction to be enabled
# OAK-4654 - Enable use of SegmentNodeStore for private mount in a multiplexing 
nodestore setup
#* Might use its own blob store
#* Compaction might be disabled as it would be read only
# OAK-4581 - Proposes to make use of SegmentNodeStore for storing event queue 
offline

In all these setups we need to configure a SegmentNodeStore which has following 
aspect
# NodeStore instance is not directly exposed but exposed via 
{{NodeStoreProvider}} interface with {{role}} service property specifying the 
intended usage
# NodeStore here is not fully functional i.e. it would not be configured with 
std observers, would not be used by ContentRepository etc

With existing SegmentNodeStoreService we can only configure 1 nodestore. To 
support above cases we need a OSGi config factory based implementation which 
enables creation of multiple SegmentNodeStore instances (each with different 
directory and different settings)



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