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https://issues.apache.org/jira/browse/IGNITE-4908?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16463940#comment-16463940
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Alexander Menshikov commented on IGNITE-4908:
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Current status of the task:
The reviewer [~NIzhikov] thinks the PR is not ready for merge because I should
implement "Conditions" and also new lock should work 100% exactly like the
current reentrant lock (including nonspecified behavers).
Also, the author of solution design [~avinogradov] now thinks his design is not
good enough and should be redesign.
So, I stopped working on the task for a while.
> Ignite.reentrantLock looks much slower than IgniteCache.lock.
> -------------------------------------------------------------
>
> Key: IGNITE-4908
> URL: https://issues.apache.org/jira/browse/IGNITE-4908
> Project: Ignite
> Issue Type: Improvement
> Components: data structures
> Affects Versions: 1.8
> Reporter: Andrew Mashenkov
> Assignee: Alexander Menshikov
> Priority: Major
>
> Design discussed with Alexander:
> 1) Lock
> Entry Processor (sync) ->
> ....add candidate.
> ....returns "added candidate at first position"
> ....retry failover ->
> ........if already at first position -> return true
> In case lock not acquired, wait for acquire (AbstractQueuedSynchronizer
> should be used).
> 2) Unlock
> Entry Processor (async) ->
> ....remove candidate at first position
> ....retry failover -> remove only if "candidate at first position" equals to
> expected
> ....listener ->
> ........notify current "candidate at first position" it got lock
> 3)Failover
> 3.1) Originating node failed
> Failed node listener ->
> ....For each local(primary) lock ->
> ........Entry Processor (async) ->
> ............remove candidates related no failed node
> ............retry failover not needed
> ............listener ->
> ................if "candidate at first position" removed ->
> ....................notify current "candidate at first position" it got lock
> 3.2) Primary node failed
> After rebalancing schedule Callable ->
> ....For each local(primary) lock ->
> ........Entry Processor (async) ->
> ............remove candidates related to failed nodes
> ............retry failover not needed
> ............listener ->
> ................notify current "candidate at first position" it got lock
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