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From "Rich Scheuerle (JIRA)" <j...@apache.org>
Subject [jira] Created: (AXIS2-3422) Eliminate redundant lookup in MessageContext.getProperty(String)
Date Thu, 03 Jan 2008 15:05:33 GMT
Eliminate redundant lookup in MessageContext.getProperty(String)
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                 Key: AXIS2-3422
                 URL: https://issues.apache.org/jira/browse/AXIS2-3422
             Project: Axis 2.0 (Axis2)
          Issue Type: Improvement
          Components: kernel
            Reporter: Rich Scheuerle
            Assignee: Rich Scheuerle


Background:
MessageContext.getProperty(String) is invoked frequently during the processing of a web service
message.
MessageContext.getProperty(String) delegates to its super class (AbstractContext) to get the
property value.  The AbstractContext is aware of parent/ancestor contexts and automatically
searches these objects.
If a value is not found, the MessageContext then looks in the OperationContext, ServiceContext,
etc. 

Problem:
The secondary search of the OperationContext, ServiceContext, etc. is not necessary if these
contexts are ancestors of the MessageContext.  
The secondary search is expensive and should be eliminated.

Solution:
Add a new method to AbstractContext, isAncestor(AbstractContext).
Use the new method in MessageContext to avoid the secondary search.

Kudos:
David Strite (IBM) found this secondary search problem while doing performance testing for
small message payloads.  The new code should increase throughput by about 2% in these cases.

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