*
* @param superstep superstep for which to run masterCompute
* @return Superstep classes set by masterCompute
*/
private SuperstepClasses prepareMasterCompute(long superstep) {
GraphState graphState = new GraphState(superstep ,
GiraphStats.getInstance().getVertices().getValue(),
GiraphStats.getInstance().getEdges().getValue(),
getContext());
SuperstepClasses superstepClasses =
new SuperstepClasses(getConfiguration());