net.floodlightcontroller.util
Class TimedCache<K>

java.lang.Object
  net.floodlightcontroller.util.TimedCache<K>

Type Parameters:

K - Type of the values in this cache

public class TimedCache<K>
extends java.lang.Object

The key is any object/hash-code The value is time-stamp in milliseconds The time interval denotes the interval for which the entry should remain in the hashmap. If an entry is present in the Linkedhashmap, it does not mean that it's valid (recently seen)

Constructor Summary

TimedCache(int capacity, int timeToLive)

Method Summary

long	getTimeoutInterval()
boolean	update(K key) Always try to update the cache and set the last-seen value for this key.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

TimedCache

public TimedCache(int capacity,
                  int timeToLive)

Parameters:

capacity - the maximum number of entries in the cache before the oldest entry is evicted.

timeToLive - specified in milliseconds

Method Detail

getTimeoutInterval

public long getTimeoutInterval()

update

public boolean update(K key)

Always try to update the cache and set the last-seen value for this key. Return true, if a valid existing field was updated, else return false. (note: if multiple threads update simultaneously, one of them will succeed, other wills return false)

Parameters:

key -

Returns:

boolean