public static int assignKeyToParallelOperator(Object key, int maxParallelism, int parallelism) {
		return computeOperatorIndexForKeyGroup(maxParallelism, parallelism, assignToKeyGroup(key, maxParallelism));
	}
public static int assignKeyToParallelOperator ( Object key , int maxParallelism , int parallelism ) { return computeOperatorIndexForKeyGroup ( maxParallelism , parallelism , assignToKeyGroup ( key , maxParallelism ) ) ; }
Assigns the given key to a parallel operator index.

@param key the key to assign
@param maxParallelism the maximum supported parallelism, aka the number of key-groups.
@param parallelism the current parallelism of the operator
@return the index of the parallel operator to which the given key should be routed.