PoolUtils.checkMinIdle

Periodically check the idle object count for the key in the keyedPool. At most one idle object will be added per period. If there is an exception when calling {@link KeyedObjectPool#addObject(Object)} then no more checks for that key will be performed.

@param keyedPool the keyedPool to check periodically. @param key the key to check the idle count of. @param minIdle if the {@link KeyedObjectPool#getNumIdle(Object)} is less than this then add an idle object. @param period the frequency to check the number of idle objects in a keyedPool, see {@link Timer#schedule(TimerTask, long, long)}. @param <K> the type of the pool key @param <V> the type of pool entries @return the {@link TimerTask} that will periodically check the pools idle object count. @throws IllegalArgumentException when <code>keyedPool</code>, <code>key</code> is <code>null</code> or when <code>minIdle</code> is negative or when <code>period</code> isn't valid for {@link Timer#schedule(TimerTask, long, long)}.