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https://issues.apache.org/jira/browse/METRON-1568?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16484377#comment-16484377
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ASF GitHub Bot commented on METRON-1568:
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Github user simonellistonball commented on the issue:
https://github.com/apache/metron/pull/1021
This is a great feature from my perspective. I've seen a number of people
try and build solutions that require access to the whole message for a bunch of
custom functions, models, rules engine integrations etc, and as a simple means
of doing this, I love the approach. To address some of the points here, I
agree, we need to avoid any chance of copying the whole map given the
performance risk with some potentially sizable and numerous objects.
Assignment... yep, _ should not be allowed on the left hand side, and it's a
map, so assignment to an output field shouldn't be a big issue.
> Stellar should have a _ special variable which returns the message in map form
> ------------------------------------------------------------------------------
>
> Key: METRON-1568
> URL: https://issues.apache.org/jira/browse/METRON-1568
> Project: Metron
> Issue Type: Improvement
> Reporter: Casey Stella
> Priority: Major
>
> In order to support functions which operate on the whole message, we should
> have a special variable (_, keeping with the vaguely scala theme) which can
> return the entire underlying message. This map should be immutable.
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