[contribution] PassiveTimeOutMap
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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
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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