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From "Christoph Gaffga (JIRA)" <j...@apache.org>
Subject [jira] Created: (COCOON-2216) IncludeCacheManager can not perfom parallel includes
Date Thu, 03 Jul 2008 11:40:45 GMT
IncludeCacheManager can not perfom parallel includes
----------------------------------------------------

                 Key: COCOON-2216
                 URL: https://issues.apache.org/jira/browse/COCOON-2216
             Project: Cocoon
          Issue Type: Bug
          Components: - Components: Sitemap
    Affects Versions: 2.2-dev (Current SVN)
            Reporter: Christoph Gaffga


Since we migrated from cocoon 2.1 to 2.2 a generator that merges multiple sources from other
cocoon pipelines into one (similar to the aggregator) is not working anymore.

We also posted our problem to the mailing list, got little feedback but it brought us on the
right way...
see also: http://www.mail-archive.com/users@cocoon.apache.org/msg42173.html

I found out that it's a problem with the DefaultIncludeCacheManager, that can not do parallel
inclusion of cocoon-pipelines anymore. I checked several classes where inclusion is used.
In the aggregator parallel inclusion is not an option anymore, in CIncludeTransformer the
IncludeCacheManager is used, but it can't do parallel inclusion. In the new IncludeTransfomer
parallel inclusion is supported, but it does not use caching as it does not use the IncludeCacheManager...

But we needed caching AND parallel processing, so I tried to find out what's broken in the
DefaultIncludeCacheManager:
and it seems that the ThreadLocal variables are not initialized for the child threads that
do the inclusion. Neither the spring context nor the old environment stuff was initialized.
And all the source resolving was done outside the child thread and that way using the wrong
thread context. 

We were able to fix that issue by small changes to DefaultIncludeCacheManager and IncludeCacheManagerSession.
It would be great if somebody could apply this patch so we don'T have to patch every cocoon
version again and again...



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