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From "Mahadev konar (JIRA)" <j...@apache.org>
Subject [jira] Updated: (ZOOKEEPER-78) added a high level protocol/feature - for easy Leader Election or exclusive Write Lock creation
Date Wed, 11 Mar 2009 05:08:50 GMT

     [ https://issues.apache.org/jira/browse/ZOOKEEPER-78?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Mahadev konar updated ZOOKEEPER-78:
-----------------------------------

    Attachment: ZOOKEEPER-78.patch

a new patch. I have changed the directory structure in this 

the code now is in
{{root}}/src/recipes/lock/src/java/org/apache/zookepeer/recipes/lock/
also the tests are in 
{{root}}/src/recipes/lock/test/org/apache/zookeeper/recipes/lock/

the new directory structure allows us to have both the java and c implemention in the same
parent directory strucure.

src/recipes/lock/

also -
- added a new interface Locklistener
- removed runnable to be a locklistener interface whose methods lockAcqured and lockReleased
are called on a lock acquired and relase of a lock
- refactored some code
- deleted not required public methods.
- added build files for the recipes directory
- changed the tests to work with new api's

i am implementing the recipes in c. Will have an updated patch up soon. comments are welcome.


> added a high level protocol/feature - for easy Leader Election or exclusive Write Lock
creation
> -----------------------------------------------------------------------------------------------
>
>                 Key: ZOOKEEPER-78
>                 URL: https://issues.apache.org/jira/browse/ZOOKEEPER-78
>             Project: Zookeeper
>          Issue Type: New Feature
>          Components: java client
>    Affects Versions: 3.0.0
>            Reporter: james strachan
>            Assignee: james strachan
>             Fix For: 3.2.0
>
>         Attachments: patch_with_including_Benjamin's_fix.patch, using_zookeeper_facade.patch,
ZOOKEEPER-78.patch, ZOOKEEPER-78.patch, ZOOKEEPER-78.patch
>
>
> Here's a patch which adds a little WriteLock helper class for performing leader elections
or creating exclusive locks in some directory znode. Note its an early cut; am sure we can
improve it over time. The aim is to avoid folks having to use the low level ZK stuff but provide
a simpler high level abstraction.

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