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https://issues.apache.org/jira/browse/WW-3691?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17612868#comment-17612868
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ASF subversion and git services commented on WW-3691:
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Commit 8f0db1d22a5cbfaf43d19628ea548387088f781a in struts's branch
refs/heads/WW-3691-executor from Lukasz Lenart
[ https://gitbox.apache.org/repos/asf?p=struts.git;h=8f0db1d22 ]
WW-3691 Converts BackgroundProcess into interface and uses Executor to execute
BackgroundProcess
> BackgroundProcess should use a java.util.concurrent.Executor alternatively to
> spawning a new thread
> ---------------------------------------------------------------------------------------------------
>
> Key: WW-3691
> URL: https://issues.apache.org/jira/browse/WW-3691
> Project: Struts 2
> Issue Type: Improvement
> Components: Core Interceptors
> Affects Versions: 2.2.3.1
> Reporter: Falko Modler
> Assignee: Lukasz Lenart
> Priority: Major
> Fix For: 6.1.0
>
> Attachments: WW-3691.patch, WW-3691_core.txt, WW-3691_showcase.txt
>
>
> Every new instance of org.apache.struts2.interceptor.BackgroundProcess spawns
> a new Thread (see constructor), no thread pooling is used.
> Besides problems in environments where some container might need to manage
> the creation of threads, this issue also prevents certain
> performance/efficiency optimizations via ThreadLocal from taking full effect.
> E.g.: We use ThreadLocals for Random and SimpleDateFormat and those thread
> local instances "are lost" when a new Thread is created.
> Therefore BackgroundProcess should be given a new constructor that takes a
> java.util.concurrent.Executor instance that is used to execute the Runnable.
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