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From "Robert Stupp (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (CASSANDRA-6871) Dynamic class loading for triggers (and udfs)
Date Tue, 20 Jan 2015 10:57:34 GMT

    [ https://issues.apache.org/jira/browse/CASSANDRA-6871?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14283697#comment-14283697
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Robert Stupp commented on CASSANDRA-6871:
-----------------------------------------

Shall we resolve this ticket in favor of a new one about something like {{CREATE TRIGGER ...
USING FUNCTION}}?

> Dynamic class loading for triggers (and udfs)
> ---------------------------------------------
>
>                 Key: CASSANDRA-6871
>                 URL: https://issues.apache.org/jira/browse/CASSANDRA-6871
>             Project: Cassandra
>          Issue Type: New Feature
>            Reporter: Edward Capriolo
>            Assignee: Edward Capriolo
>
> Currently the trigger feature requires out of band shipping jar files to servers. In
the near future users may be able to provide custom functions like trim() dynamically like
pig and hive do. In order to accomplish this securely my suggestion is this.
> 1. Add a new configuration knob to cassandra.yaml which controls how users are allowed
to load class definitions. 
> {code}
> dynamic_loading:
>     - JAVA_LOCAL_CLASSPATH
>     - GROOVY_CLASS_LOADER
> {code}
> 2. Add the https://github.com/edwardcapriolo/nit-compiler to the project as a dependency.

> 3. Profit: A follow on piece would allow triggers to be defined in a JVM language. Features
like https://issues.apache.org/jira/browse/CASSANDRA-6870 could use this. Users can also create
different pluggable components to CQL at runtime. 
> This issue would just be about brining the dynamic loading mechanism in the project securely.
Not implementing it in a user facincg way.



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