[jira] [Work logged] (WW-5647) Use ConcurrentHashMap for XSLT template cache

[ASF GitHub Bot (Jira)]

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https://issues.apache.org/jira/browse/WW-5647?focusedWorklogId=1031144&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-1031144
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ASF GitHub Bot logged work on WW-5647:
--------------------------------------

                Author: ASF GitHub Bot
            Created on: 19/Jul/26 18:40
            Start Date: 19/Jul/26 18:40
    Worklog Time Spent: 10m 
      Work Description: lukaszlenart commented on PR #1781:
URL: https://github.com/apache/struts/pull/1781#issuecomment-5016928081

   LGTM 👍 




Issue Time Tracking
-------------------

    Worklog Id:     (was: 1031144)
    Time Spent: 0.5h  (was: 20m)

> Use ConcurrentHashMap for XSLT template cache
> ---------------------------------------------
>
>                 Key: WW-5647
>                 URL: https://issues.apache.org/jira/browse/WW-5647
>             Project: Struts 2
>          Issue Type: Improvement
>          Components: Plugin - XSLT
>    Affects Versions: 7.2.1
>            Reporter: Arun Manni
>            Priority: Minor
>             Fix For: 7.3.0
>
>          Time Spent: 0.5h
>  Remaining Estimate: 0h
>
> The XSLT template cache in XSLTResult uses a plain HashMap with an 
> unsynchronized get() outside the synchronized block. Under concurrent 
> access this can produce stale reads or exceptions from internal 
> HashMap corruption.
> This patch replaces HashMap with ConcurrentHashMap for thread-safe 
> reads, adds a double-check inside the synchronized block to avoid 
> redundant template compilation, and removes the static initializer 
> in favour of inline initialization.



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