public static List < LocalityLevel > neededLocalityLevels ( ResourceType type ) { List < LocalityLevel > l = new ArrayList < LocalityLevel > ( ) ; switch ( type ) { case MAP : l . add ( LocalityLevel . NODE ) ; l . add ( LocalityLevel . RACK ) ; l . add ( LocalityLevel . ANY ) ; break ; case REDUCE : l . add ( LocalityLevel . ANY ) ; break ; case JOBTRACKER : l . add ( LocalityLevel . ANY ) ; break ; default : throw new RuntimeException ( "Undefined locality behavior for " + type ) ; } return l ; }
Returns the required locality levels in order of preference for the resource type .