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Brian ONeill commented on CASSANDRA-1311:
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Ed, you took the words right out of my mouth. If possible, the classloading
should provide isolation of dependencies. We're struggling with this right now
w/ Storm. (See: https://github.com/nathanmarz/storm/issues/115)
It would be great if our solution accounted for this from the get go. To do
this, it might be necessary to have a separate directory that the users can
drop their jars into. If it complicates things too much however or delays the
implementation, I'd be fine with an initial version that didn't provide
isolation between dependencies.
(BTW -- great to see progress on this)
> 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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