[jira] Issue Comment Edited: (CASSANDRA-1016) Plugins

["Edward Ribeiro (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/CASSANDRA-1016?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12884327#action_12884327 ] 

Edward Ribeiro edited comment on CASSANDRA-1016 at 7/1/10 11:55 AM:
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Jeff, 

What about using a CopyOnWriteArrayList<WriteCallback> instead of using a ArrayList? 

If the writeCallbacks list is read heavy then CopyOnWriteArrayList is better because 1) you get a  concurrent list cheaply and 2) you avoid ConcurrentModificationException being ever thrown. Just a suggestion. :)

Regards,
Ed

      was (Author: eribeiro):
    Jeff, 

What about using a CopyOnWriteArrayList<WriteCallback> instead of using a ArrayList? 

If the writeCallbacks list is read heavy then CopyOnWriteArrayList is better because 1) you can an concurrent list cheaply and 2) you avoid ConcurrentModificationException being ever thrown.

Regards,
Ed
  
> Plugins
> -------
>
>                 Key: CASSANDRA-1016
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-1016
>             Project: Cassandra
>          Issue Type: New Feature
>    Affects Versions: 0.6.1
>            Reporter: Ryan King
>            Assignee: Jeff Hodges
>         Attachments: CASSANDRA-1016-2.patch, CASSANDRA-1016.patch
>
>
> As discussed at the Digg-hosted hackathon.
> First off, this needs a better name, the idea isn't exactly like coprocessors from BigTable and this entry should be considered a stub for now (Stu and Marius should be able to provide more details).
> The idea is that for mutation operations, we should all the user to run a routine that has access to the "old" version of the data and the "new" version, and can take action.
> At a bare minimum, this should be capable of implementing distributed secondary indexes.

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