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From "Arpit Agarwal (JIRA)" <j...@apache.org>
Subject [jira] [Comment Edited] (HADOOP-13466) Add an AutoCloseableLock class
Date Thu, 04 Aug 2016 18:13:20 GMT

    [ https://issues.apache.org/jira/browse/HADOOP-13466?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15408243#comment-15408243

Arpit Agarwal edited comment on HADOOP-13466 at 8/4/16 6:12 PM:

Thanks [~vagarychen]. Actually never mind, I think this text is fine to have.

+1 pending Jenkins result on the v2 patch.

was (Author: arpitagarwal):
Thanks [~vagarychen]. Minor comment - we can eliminate the following text from the AutoCloseableLock
javadoc since the lock held count is a ReentrantLock detail. The rest of the Javadocs look

then sets
43	   * lock held count to one, then returns immediately.
44	   *
45	   * If the current thread already holds the lock, increase the lock
46	   * help count by one and returns immediately.

65	   * If the current thread holds the lock, decrements the hold
66	   * count. If the hold count reaches zero, the lock is released.

92	   * hold count to one and returns {@code true}.
93	   *
94	   * If the current thread already holds the lock, the increment the hold
95	   * count by one and returns {@code true}.

By the way you don't need to click cancel/submit patch every time. :) Jenkins is smart enough
to pick up the latest patch when you attach it.

> Add an AutoCloseableLock class
> ------------------------------
>                 Key: HADOOP-13466
>                 URL: https://issues.apache.org/jira/browse/HADOOP-13466
>             Project: Hadoop Common
>          Issue Type: Improvement
>            Reporter: Chen Liang
>            Assignee: Chen Liang
>         Attachments: HADOOP-13466.001.patch, HADOOP-13466.002.patch
> Introduce an AutoCloseableLock class that allows using a RentrantLock with try-with-resources
> The lock class is lightweight and performs no extra object allocations in the lock acquire/release

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