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https://issues.apache.org/jira/browse/JEXL-216?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Henri Biestro resolved JEXL-216.
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Resolution: Fixed
Fix Version/s: 3.1
Added reader/writer lock to cache held by soft reference;
Added logic to create temporary parser when main one is already busy (since
parser is not reentrant)
src/main/java/org/apache/commons/jexl3/internal/Engine.java
src/main/java/org/apache/commons/jexl3/internal/InterpreterBase.java
src/main/java/org/apache/commons/jexl3/internal/SoftCache.java
src/main/java/org/apache/commons/jexl3/internal/TemplateEngine.java
Revision: 1786352
> Improve parsing concurrency in multithreaded environment
> --------------------------------------------------------
>
> Key: JEXL-216
> URL: https://issues.apache.org/jira/browse/JEXL-216
> Project: Commons JEXL
> Issue Type: Improvement
> Affects Versions: 3.0
> Reporter: Dmitri Blinov
> Assignee: Henri Biestro
> Priority: Minor
> Fix For: 3.1
>
>
> At the moment the {{Engine.parse()}} method synchronizes on {{parser}} member
> even if the caching is enabled and the actual parsing is not required, in
> case of cache hit. This effectively serializes processing of scripts and
> expressions in multithreaded scenario. The suggestion is to separate
> synchronization on cache from synchronization on parser, with the latter only
> being performed if actual parsing is required.
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