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From "Sergey Zhemzhitsky (JIRA)" <j...@apache.org>
Subject [jira] [Issue Comment Edited] (CAMEL-4397) add route support for Hazelcast distributed locking/unlocking
Date Wed, 21 Sep 2011 13:29:10 GMT

    [ https://issues.apache.org/jira/browse/CAMEL-4397?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13109460#comment-13109460
] 

Sergey Zhemzhitsky edited comment on CAMEL-4397 at 9/21/11 1:29 PM:
--------------------------------------------------------------------

Hi guys,

What do you think about org.apache.camel.spi.RoutePolicy implementation that uses hazelcast
to support distributed locking/unloking? 

Such a route policy will force the route to run only on a single node in the cluster. Moreover
there can be two route policies: 
# the first one will create a distributed lock on every incoming exchange and will release
the lock when exchange processing completes. This policy will allow to process exchange only
on a single node of the cluster at a given time. When exchange processing completes the second
node in the cluster will be able to obtain a lock.
# the second route policy will create a distributed lock on route startup, and will release
the lock on route shutdown, so the route will run only on a single node in the cluster all
the time.


      was (Author: szhemzhitsky):
    Hi guys,

What do you think about org.apache.camel.spi.RoutePolicy implementation that uses hazelcast
to support distributed locking/unloking? 

Such a route policy will force the route to run only on a single node in the cluster.

  
> add route support for Hazelcast distributed locking/unlocking
> -------------------------------------------------------------
>
>                 Key: CAMEL-4397
>                 URL: https://issues.apache.org/jira/browse/CAMEL-4397
>             Project: Camel
>          Issue Type: Improvement
>          Components: camel-hazelcast
>            Reporter: Ben O'Day
>            Assignee: Ben O'Day
>            Priority: Minor
>             Fix For: 2.9.0
>
>         Attachments: CAMEL-4397.patch
>
>
> add support for Hazelcast distributed locking/unlocking APIs in a route...see http://www.hazelcast.com/documentation.jsp#Lock
> something like this...
> {code}
> from("seda:lockTest")
>   .doTry()
>     .setHeader(HazelcastConstants.LOCK_OBJECT, simple("ID-${header.id}"))
>     .to("hazelcast:lock")
>     .setBody(simple("processed[${body}]"))
>     .to("mock:mock")
>   .doFinally()
>     .to("hazelcast:unlock");
> {code}

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