[jira] [Updated] (JEXL-255) Ability to continue interrupted scripts

["Henri Biestro (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/JEXL-255?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Henri Biestro updated JEXL-255:
-------------------------------
    Assignee: Henri Biestro

> Ability to continue interrupted scripts
> ---------------------------------------
>
>                 Key: JEXL-255
>                 URL: https://issues.apache.org/jira/browse/JEXL-255
>             Project: Commons JEXL
>          Issue Type: Improvement
>    Affects Versions: 3.1
>            Reporter: Dmitri Blinov
>            Assignee: Henri Biestro
>            Priority: Major
>
> I'm trying to implement the {{@timeout}} annotation that should work like the following
> {code:java}
> @timeout(15000) { return longrunningcall(); }
>  {code}
> The idea is to protect part of the script code from being executed indefinitely or more than allowed by business rules. The script should continue its evaluation after the {{@timeout}} annotation regardless of whether the timeout has taken place or not.
> There is a straightforward implementation that starts guarding thread which should invoke {{Thread.interrupt()}} for the thread executing the script. The {{InterruptedException | JexlException.Cancel}} is then caught and swallowed inside the {{processAnnotation()}} method, and if the guard thread has fired, which means the timeout occured, the {{null}} value is returned.
> I expected the script to continue its evaluation after the exception is processed inside {{processAnnotation()}} code, but the script nevertheless throwed {{JexlException.Cancel}} as a result. The suggestion is to allow script to continue its evaluation once {{InterruptedException}} or {{JexlException.Cancel}} is processed. 



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