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From "Pelladi Gabor (JIRA)" <j...@apache.org>
Subject [jira] [Created] (OGNL-224) Performance - Locking and performance problem with OgnlRuntime.findParameterTypes
Date Fri, 19 Oct 2012 08:28:11 GMT
Pelladi Gabor created OGNL-224:
----------------------------------

             Summary: Performance - Locking and performance problem with OgnlRuntime.findParameterTypes
                 Key: OGNL-224
                 URL: https://issues.apache.org/jira/browse/OGNL-224
             Project: Commons OGNL
          Issue Type: Improvement
          Components: Core Runtime
    Affects Versions: 3.0
            Reporter: Pelladi Gabor
            Priority: Minor


I am using struts2 and under heavy load (around 100 threads) many threads are in BLOCKED state
because of OgnlRuntime.findParameterTypes(). The actions we use have a generic superclass
like:
public class PersonalCaptureAction extends DataCaptureAction<PersonalDTO>
OGNL handles this very bad, it enters
synchronized (_genericMethodParameterTypesCache)
all the time, at every property access of the Action. A possible workaround is to introduce
another layer of superclass that is not generic.

I know that in current OGNL trunk (4.0-SNAPSHOT) caching has been rewritten, but Struts2 is
using 3.0.5, and maybe it could be fixed as 3.0.6 in the git tree I found:
https://github.com/jkuhnert/ognl

I will attach a patch and a testcase.

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