Log.debug(LOG, "results : ", results);
	public String execute(String userName, Datum modelDatum, Datum dataDatum, Datum commandsDatum)	{		VerifyCommand verify = new VerifyCommand(userName);		execute(verify);		String serverID = verify.getServerID();					BeginJobCommand beginJob = new BeginJobCommand(userName, modelDatum, dataDatum, commandsDatum);		execute(beginJob);		String jobNumber = beginJob.getJobNumber();		GetResultsCommand getResults = new GetResultsCommand(userName, jobNumber);		execute(getResults);		String results = getResults.getResults();		return results;	}