TwoPhaseCommit interface
------------------------
Key: LUCENE-3193
URL: https://issues.apache.org/jira/browse/LUCENE-3193
Project: Lucene - Java
Issue Type: New Feature
Components: core/index
Reporter: Shai Erera
Assignee: Shai Erera
Fix For: 3.3, 4.0
I would like to propose a TwoPhaseCommit interface which declares the methods
necessary to implement a 2-phase commit algorithm:
* prepareCommit()
* commit()
* rollback()
The prepare/commit ones have variants that take a (Map<String,String>
commitData) following the ones we have in IndexWriter.
In addition, a TwoPhaseCommitTool which implements a 2-phase commit amongst
several TPCs.
Having IndexWriter implement that interface will allow running the 2-phase
commit algorithm on multiple IWs or IW + any other object that implements the
interface.
We should mark the interface @lucene.internal so as to not block ourselves in
the future. This is pretty advanced stuff anyway.
Will post a patch soon
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