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From "Oliver Heger (JIRA)" <j...@apache.org>
Subject [jira] Updated: (LANG-501) Add support for background initialization
Date Tue, 05 May 2009 20:29:36 GMT

     [ https://issues.apache.org/jira/browse/LANG-501?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Oliver Heger updated LANG-501:
------------------------------

    Attachment: BackgroundInitializer.patch

Thanks for the feedback.

Of course, {{setExternalExecutor()}} needs to be synchronized. I simply forgot this. At the
beginning I had this field final. But then I had the idea that later a {{MultiBackgroundInitializer}}
could be added that manages multiple {{BackgroundInitializer}} objects and shares its {{ExecutorService}}
between them. For this use case the {{ExecutorService}} needs to be mutable.

I slightly modified the implementation to address your other points: The package private methods
are now only called from synchronized blocks, so there is no need for them being synchronized.
{{InitializationTask}} is passed a reference to the {{ExecutorService}} it should destroy,
so it need not access a member field of the outer class any more.

> Add support for background initialization
> -----------------------------------------
>
>                 Key: LANG-501
>                 URL: https://issues.apache.org/jira/browse/LANG-501
>             Project: Commons Lang
>          Issue Type: New Feature
>            Reporter: Oliver Heger
>            Priority: Minor
>             Fix For: 3.0
>
>         Attachments: BackgroundInitializer.patch
>
>
> This is a suggestion to add a {{BackgroundInitializer}} class that  allows initializing
an object in a background task. {{BackgroundInitializer}} is a thin wrapper around a {{java.util.concurrent.Future}}
object and uses an {{ExecutorService}} for starting a background task that performs initialization.

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