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From "Richard Eckart de Castilho (JIRA)" <...@uima.apache.org>
Subject [jira] [Commented] (UIMA-1970) Reload updated resources while an analysis pipeline is running
Date Thu, 08 Sep 2016 08:20:21 GMT

    [ https://issues.apache.org/jira/browse/UIMA-1970?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15473186#comment-15473186
] 

Richard Eckart de Castilho commented on UIMA-1970:
--------------------------------------------------

My understanding is that the way Jörg describes it "a way to update" is basically a call
to reinitialize(). That would leave the user to writing the trigger code. If I imagine that,
I end up with something like:

{noformat}
if (needsUpdate()) {
  reinitialize();
}
{noformat}

This code seems so trivial that a user desiring an auto-updating resource could easily put
it into the resource itself. I don't see at the moment what useful contribution the core UIMA
framework could provide here.

> Reload updated resources while an analysis pipeline is running
> --------------------------------------------------------------
>
>                 Key: UIMA-1970
>                 URL: https://issues.apache.org/jira/browse/UIMA-1970
>             Project: UIMA
>          Issue Type: New Feature
>          Components: Async Scaleout
>            Reporter: Joern Kottmann
>              Labels: Resources
>
> In many use cases resources used by Analysis Engine are updated more frequently than
the AE implementation.
> Samples of such resources are huge dictionaries which are extended with new names on
a daily basis
> or statistical models which are re-trained frequently to be adjusted to data from the
past minutes.  
> For a resource updates an analysis pipeline has to be stopped and started manually to
pick up the updated resource.
> It would be nice if the framework could automate this procedure. In order to do that
it must have a capability to detect
> updated resources and perform the re-initialization of affected Analysis Engines.
> If the pipelines run multiple instances of these Analysis Engines it would be nice if
a rolling
> update could be performed in a way that the processing of CASes never comes to an halt.
> That should be handled in different issues for the CPE and UIMA-AS. 



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