public Object put ( Object key , Object value ) { long objectStamp = System . currentTimeMillis ( ) ; synchronized ( objects ) { objectTimeStamps . put ( key , objectStamp ) ; if ( nextTimeSomeExpired == NO_OBJECTS ) { nextTimeSomeExpired = objectStamp ; } return objects . put ( key , value ) ; } }
Method to store value in cache if this value first in cache - also mark nextTimeSomeExpired as its creating time ;