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From "Antonio Magnaghi (JIRA)" <j...@apache.org>
Subject [jira] Commented: (PIG-11) Pig command - add search path for UDF .jar files
Date Sun, 04 Nov 2007 15:42:50 GMT

    [ https://issues.apache.org/jira/browse/PIG-11?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel#action_12540074
] 

Antonio Magnaghi commented on PIG-11:
-------------------------------------

Olga,

I am looking into a fix for this. Can you please assign this bug to me?

One possible implementation could be:

1.) if the user passes an absolute path to the jar to register, look for that file (irrespective
of the CLASSPATH) and if we fail to locate the jar, just fail.

2.) if the user does not pass an absolute path, do a sequencial search on each element in
CLASSPATH (for those elements in CLASSPATH that are not jar's): append the user passed path
to CLASSPATH elements and see if we can locate the jar. We stop the search the first time
we have a match. If we don't find any match, we fail.

As for the search in the local directory first, there are two possible approaches:

- on one side if the user wants to search in the local directory first, he/she should set
the current directory (".") at the very beginning of the CLASSPATH.

- on the other side, one can say that expecting the CLASSPATH to contain the current directory
as a prefix may be not compatible with what current users expect. I.e. they expect the search
to start with the current local dir. So we could preserve that.

Thanks,
-a.

> Pig command - add search path for UDF .jar files
> ------------------------------------------------
>
>                 Key: PIG-11
>                 URL: https://issues.apache.org/jira/browse/PIG-11
>             Project: Pig
>          Issue Type: Improvement
>          Components: impl
>            Reporter: Olga Natkovich
>            Priority: Minor
>
> Add a mechanism so that invocations of:
> 	register my.jar;
> will search not only the local directory but a set of paths.  This could
> simply be classpath.
> This will permit users to have build trees of UDFs that commonly share
> across different piglets
> without having to copy the jar locally to each directory and without
> having to use absolute
> pathnames to refer to the files.

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