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From "Sergio Bossa (JIRA)" <j...@apache.org>
Subject [jira] [Updated] (CASSANDRA-6135) Add beforeChange Notification to Gossiper State.
Date Thu, 10 Oct 2013 11:47:43 GMT

     [ https://issues.apache.org/jira/browse/CASSANDRA-6135?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Sergio Bossa updated CASSANDRA-6135:
------------------------------------

    Attachment: CASSANDRA-6135-V3.patch

New patch (V3) which checks for max version changes before bumping the new VersionedValue
version: not really convinced that's actually the right thing to do, but it shouldn't bump
the version if no subscriber does any lengthy work in its beforeChange method.

One thing I didn't noted before, is that beforeChange is part of the IEndpointStateChangeSubscriber
interface, so checking for subscribers will practically have no effect as there will always
be some.

> Add beforeChange Notification to Gossiper State.
> ------------------------------------------------
>
>                 Key: CASSANDRA-6135
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6135
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Benjamin Coverston
>            Assignee: Sergio Bossa
>         Attachments: 0001-New-Gossiper-notification-to-IEndpointStateChangeSub.patch,
0002-CASSANDRA-6135.diff, CASSANDRA-6135-V3.patch
>
>
> We would like an internal notification to be fired before state changes happen so we
can intercept them, and in some cases defer them.



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