[jira] Updated: (COLLECTIONS-241) [contribution] PassiveTimeOutMap

["Elifarley Callado Coelho (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/COLLECTIONS-241?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Elifarley Callado Coelho updated COLLECTIONS-241:
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    Attachment: PassiveTimeOutMap.zip

Source code for PassiveTimeOutMap class, and a ready-to-use usage example (you can run it by using ptom.bat or ptom.sh).

> [contribution] PassiveTimeOutMap
> --------------------------------
>
>                 Key: COLLECTIONS-241
>                 URL: https://issues.apache.org/jira/browse/COLLECTIONS-241
>             Project: Commons Collections
>          Issue Type: New Feature
>          Components: Map
>            Reporter: Elifarley Callado Coelho
>            Priority: Minor
>         Attachments: PassiveTimeOutMap.zip
>
>
> This is a Map decorator which passively evicts expired keys once their expiry time has been reached.
> When putting a key-value pair in the map, this decorator calls expiryTime(key, value), passing the key and the value as parameters, and uses the returned value as the expiry time for that key.
> When getting the value for a key, its expiry time is checked, and if it's greater than the current time, the value is returned. Otherwise, the key is removed from the decorated map, and null is returned.
> Doing so, there's no need to have a separate, active thread (hence the name 'passive') to check expiry times - the check is performed on demand.

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