Documentation for selective READ_COMMITTED transaction isolation using RW lock

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CQEngine currently supports selective (per write, per query, or global) 
READ_COMMITTED transaction isolation, if the application takes care to 
demarcate its transactions using a ReadWriteLock.
This was discussed in the forum: 
https://groups.google.com/forum/#!topic/cqengine-discuss/9jIo0y5RDHA

Although it was discussed in the forum, the approach should be documented 
properly on a wiki page.

Original issue reported on code.google.com by ni...@npgall.com on 21 Dec 2013 at 2:28

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Original comment by ni...@npgall.com on 21 Dec 2013 at 2:31

• Added labels: Type-Other
• Removed labels: Component-Docs

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This is done in TransactionIsolation.
Multi-Version Concurrency Control (MVCC) is also supported.

Original comment by ni...@npgall.com on 20 Apr 2015 at 8:22

• Changed state: Done