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https://issues.apache.org/jira/browse/IGNITE-642?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15214375#comment-15214375
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Vladisav Jelisavcic commented on IGNITE-642:
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Yakov,
thanks for the comments, great, I will push the changes as soon as I add
failover tests with the fair flag on and additional javadoc.
Considering IGNITE-2004, it shouldn't affect lock nor semaphore, because no
cache operations are executed within that thread - onUpdate calls
AbstractQueuedSynchronizer#release(0) method, which wakes the first waiting
thread (if there is one) and returns immediately (all cache operations are done
in the awakened thread).
> Implement IgniteReentrantLock data structure
> --------------------------------------------
>
> Key: IGNITE-642
> URL: https://issues.apache.org/jira/browse/IGNITE-642
> Project: Ignite
> Issue Type: Sub-task
> Components: data structures
> Affects Versions: 1.6
> Reporter: Dmitriy Setrakyan
> Assignee: Vladisav Jelisavcic
> Labels: features
> Fix For: 1.6
>
>
> We need to add {{IgniteReentrantLock}} data structure in addition to other
> data structures provided by Ignite. {{IgniteReentrantLock}} should have
> similar API to {{java.util.concurrent.locks.ReentrantLock}} class in JDK.
> As an example, you can see how
> [IgniteCountDownLatch|https://github.com/apache/incubator-ignite/blob/master/modules/core/src/main/java/org/apache/ignite/IgniteCountDownLatch.java]
> is implemented in
> [GridCacheCountDownLatchImpl|https://github.com/apache/incubator-ignite/blob/master/modules/core/src/main/java/org/apache/ignite/internal/processors/datastructures/GridCacheCountDownLatchImpl.java]
> class.
> In general we need to have an entity in ATOMIC cache storing lock-owner
> identifier together with a queue of waiters.
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