/*
 * Copyright (C) 2011 Universidade Federal de Campina Grande
 *  
 * This file is part of OurGrid. 
 *
 * OurGrid is free software: you can redistribute it and/or modify it under the
 * terms of the GNU Lesser General Public License as published by the Free 
 * Software Foundation, either version 3 of the License, or (at your option) 
 * any later version. 
 * 
 * This program is distributed in the hope that it will be useful, but WITHOUT 
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or 
 * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
 * for more details. 
 * 
 * You should have received a copy of the GNU Lesser General Public License 
 * along with this program. If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.ourgrid.worker.business.requester;

import java.util.ArrayList;
import java.util.List;

import org.ourgrid.common.internal.IResponseTO;
import org.ourgrid.common.internal.response.LoggerResponseTO;
import org.ourgrid.worker.business.controller.ExecutionController;
import org.ourgrid.worker.business.dao.ExecutionDAO;
import org.ourgrid.worker.business.dao.WorkerDAOFactory;
import org.ourgrid.worker.business.messages.ExecutionControllerMessages;
import org.ourgrid.worker.communication.dao.FutureDAO;
import org.ourgrid.worker.request.ExecutionIsRunningRequestTO;

public class ExecutionIsRunningRequester extends
			AbstractWorkerExecutionClientRequester<ExecutionIsRunningRequestTO> {

	public List<IResponseTO> execute(ExecutionIsRunningRequestTO request) {
		
		List<IResponseTO> responses = new ArrayList<IResponseTO>();
		FutureDAO futureDAO = WorkerDAOFactory.getInstance().getFutureDAO();
		ExecutionDAO executionDAO = WorkerDAOFactory.getInstance().getExecutionDAO();
		
		if (isExecuteState(futureDAO, executionDAO)) {
			responses.add(new LoggerResponseTO(
					ExecutionControllerMessages.
					getExecutionIsNotRunningMessage(),LoggerResponseTO.WARN));
			return responses;
		}
		
		ExecutionController.getInstance().executionIsRunning(request.getHandle());
		
		return responses;
	}

	private boolean isExecuteState(FutureDAO futureDAO,
			ExecutionDAO executionDAO) {
		return !(executionDAO.getCurrentHandle() == null &&
				futureDAO.getExecutionActionFuture() != null);
	}

}