private Vector<Clustering> clusterOperation = null; //<Clustering>
// vector of the listener on adding clustering or deleting
private Vector<ModifiedClustering> listenerOnModifyClustering = null;
public WorkloadAnalysisSession() {
super(new ModelWorkloadAnalysis());
clusterOperation = new Vector<Clustering>();
listenerOnModifyClustering = new Vector<ModifiedClustering>();
}