[HBASE-6522] Expose locks and leases to Coprocessors

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.94.2
• Hadoop Flags: Reviewed
• Assignee: Lars Hofhansl
• Reporter: Lars Hofhansl
• Created: 07/Aug/12 17:40
• Updated: 07/Apr/13 05:13
• Resolved: 09/Aug/12 05:31

Description

Currently it is not possible for CP to implement any of checkAndMutate type operations, because coprocessor have no way create a lock, because getLock is private HRegion (interestingly ReleaseLock is public).

In addition it would nice if Coprocessor could hook into the RegionServers' Lease management.

Here I propose two trivial changes:

1. Make HRegion.getLock public
2. Add

   Leases getLeases()

   to RegionServerServices (and hence to HRegionServer)