[OAK-5430] Provide an extension point in DocumentNodeStore Journal support

• Type: Technical task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 1.5.18, 1.6.0
• Component/s: documentmk
• Assignee: Chetan Mehrotra
• Reporter: Chetan Mehrotra
• Created: 10/Jan/17 07:21
• Updated: 11/Jul/18 09:48
• Resolved: 11/Jan/17 05:28

Description

As discussed in OAK-4808 B1 I would like to expose an extension point in form of SPI in DocumentNodeStore Journal handling.

Each component which needs to add a custom property to JournalEntry would provide a JournalPropertyService. This service would provide a JournalPropertyBuilder which would be used to accumulate the JournalProperty

1. For background write - JournalProperty would be read from CommitInfo and would be added to the builder. Upon background write cycle the builder would provide a string representation of the builder state which would be save as a property in JournalEntry
2. For background read - DocumentNodeStore would create builder for each service and would update them from string property value which are read from the JournalEntry

DocumentNodeStore would lookup all JournalPropertyService via JournalPropertyServiceTracker and construct a JournalPropertyHandler which would manage the builder state

Issue Links

• is related to: OAK-5480 oak-core/repository left after a build
• is related to: OAK-7624 Add "org.apache.jackrabbit.oak.plugins.document.spi" to package export filter