[HBASE-11092] Server interface should have method getConsensusProvider()

• Type: Sub-task
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.99.0
• Fix Version/s: 0.99.0
• Component/s: Consensus
• Hadoop Flags: Reviewed
• Assignee: Mikhail Antonov
• Reporter: Mikhail Antonov
• Created: 28/Apr/14 21:20
• Updated: 21/Feb/15 23:30
• Resolved: 08/May/14 05:35

Description

As discussed in comments to HBASE-10915, we need to have a proper way to retrieve instance of consensus provider, and Server interface seems the right one.

Since Server interface lives in hbase-client maven module, the following approach is implemented in this patch:

• hbase-client module has very basic (almost marker) interface ConsensusProvider to return instance of consensus provider from the Server
• hbase-server module has BaseConsensusProvider which defines the consensus interfaces
• Implementations shall subclass BaseConsensusProvider
• whoever wants to get ConsensusProvider from raw Server interface on hbase-server side, has to typecast: (BaseConsensusProvider)

Issue Links

• is required by: HBASE-10915 Decouple region closing (HM and HRS) from ZK
• is required by: HBASE-10962 Decouple region opening (HM and HRS) from ZK
• is required by: HBASE-10985 Decouple Split Transaction from Zookeeper
• is required by: HBASE-11069 Decouple region merging from ZooKeeper
• is required by: HBASE-11108 Split ZKTable into interface and implementation