question: private void addPingTimeData ( long sample ) { lastPingTimesLock . lock ( ) ; try { if ( lastPingTimes == null ) { lastPingTimes = new long [ PING_MOVING_AVERAGE_WINDOW ] ; Arrays . fill ( lastPingTimes , sample ) ; } else { System . arraycopy ( lastPingTimes , 1 , lastPingTimes , 0 , lastPingTimes . length - 1 ) ; lastPingTimes [ lastPingTimes . length - 1 ] = sample ; } } finally { lastPingTimesLock . unlock ( ) ; } }
target:  Adds a ping time sample to the averaging window. 