question: public LogNetworkStreamMerger ( LogRequest req , MediaType mediaType , LogSvcPropertiesLoader propertiesLoader ) { logger . trace ( "In LogNetworkStreamMerger's constructor" ) ; this . request = req ; this . mediaType = mediaType ; this . propertiesLoader = propertiesLoader ; List < LogNetworkReader > readers = getLogNetworkStreams ( ) ; int size = readers . size ( ) ; logHeads = new LogMessage [ size ] ; this . logStreamList = new LogNetworkReader [ size ] ; int index = 0 ; for ( LogNetworkReader reader : readers ) { logStreamList [ index ] = reader ; logHeads [ index ] = null ; index ++ ; } }
target:  Merges all logs on each node based on time stamp