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Date: Wed, 14 Oct 2015 23:43:06 +0000 (UTC)
From: "Vladisav Jelisavcic (JIRA)" <jira@apache.org>
To: issues@ignite.apache.org
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Subject: [jira] [Commented] (IGNITE-638) Implement IgniteSemaphore data
 structure
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    [ https://issues.apache.org/jira/browse/IGNITE-638?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14958023#comment-14958023 ] 

Vladisav Jelisavcic commented on IGNITE-638:
--------------------------------------------

I made a new commit addressing those issues. 
It seems that GridCacheAbstractDataStructuresFailoverSelfTest is currently broken ([ignite-801|https://issues.apache.org/jira/browse/IGNITE-801] and [ignite-803|https://issues.apache.org/jira/browse/IGNITE-803]). \\
I guess additional tests should be placed there but i guess there is no point doing it until these are fixed?


> Implement IgniteSemaphore data structure
> ----------------------------------------
>
>                 Key: IGNITE-638
>                 URL: https://issues.apache.org/jira/browse/IGNITE-638
>             Project: Ignite
>          Issue Type: Sub-task
>          Components: data structures
>    Affects Versions: sprint-9
>            Reporter: Dmitriy Setrakyan
>            Assignee: Vladisav Jelisavcic
>              Labels: features, newbie
>             Fix For: 1.5
>
>
> We need to add {{IgniteSemaphore}} data structure in addition to other data structures provided by Ignite. {{IgniteSemaphore}} should have similar API to {{java.util.concurrent.IgniteSemaphore}} 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 number of permits and allow user threads to block whenever no more permits are available.


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