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https://issues.apache.org/jira/browse/CASSANDRA-1311?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13496275#comment-13496275
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Edward Capriolo commented on CASSANDRA-1311:
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What do you guys think about a triggers in groovy? We do that here in our
infrastructure. You can support multiple backends for dynamic classloading,
"jar" "groovy" "closure" etc. Groovy is fairly efficient and it does not
involved logging jars around. Groovy has a @GRAB annotation for example. I
still like Patrick's idea but whenever you have physical jars somewhere you
really have the same operational overhead. Arguably getting the jars into
cassandra is more complex then just putting jars into a folder across a group
of servers. Since getting jars into folder is easily accomplished.
> Triggers
> --------
>
> Key: CASSANDRA-1311
> URL: https://issues.apache.org/jira/browse/CASSANDRA-1311
> Project: Cassandra
> Issue Type: New Feature
> Reporter: Maxim Grinev
> Assignee: Vijay
> Fix For: 1.3
>
> Attachments: HOWTO-PatchAndRunTriggerExample.txt,
> HOWTO-PatchAndRunTriggerExample-update1.txt, ImplementationDetails.pdf,
> ImplementationDetails-update1.pdf, trunk-967053.txt,
> trunk-984391-update1.txt, trunk-984391-update2.txt
>
>
> Asynchronous triggers is a basic mechanism to implement various use cases of
> asynchronous execution of application code at database side. For example to
> support indexes and materialized views, online analytics, push-based data
> propagation.
> Please find the motivation, triggers description and list of applications:
> http://maxgrinev.com/2010/07/23/extending-cassandra-with-asynchronous-triggers/
> An example of using triggers for indexing:
> http://maxgrinev.com/2010/07/23/managing-indexes-in-cassandra-using-async-triggers/
> Implementation details are attached.
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