QoSDConfigFactory.java

/*******************************************************************************
 * This file is part of OpenNMS(R).
 *
 * Copyright (C) 2006-2011 The OpenNMS Group, Inc.
 * OpenNMS(R) is Copyright (C) 1999-2011 The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
 *
 * OpenNMS(R) is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published
 * by the Free Software Foundation, either version 3 of the License,
 * or (at your option) any later version.
 *
 * OpenNMS(R) 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 General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with OpenNMS(R).  If not, see:
 *      http://www.gnu.org/licenses/
 *
 * For more information contact:
 *     OpenNMS(R) Licensing <license@opennms.org>
 *     http://www.opennms.org/
 *     http://www.opennms.com/
 *******************************************************************************/

package org.openoss.opennms.spring.qosd;

import java.io.IOException;

import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.ValidationException;
import org.opennms.core.xml.CastorUtils;
import org.springframework.core.io.FileSystemResource;

/**
 * loads the Qosd configuration from QoSD-configuration.xml
 *
 * @author ranger
 * @version $Id: $
 */
public class QoSDConfigFactory {
	
	private static QoSDConfiguration config;
    
    /** Constant <code>is_loaded=false</code> */
    public static boolean is_loaded = false;
    
    // XXX Don't use opennms.home directly and don't use "/"
    /**
     * <p>reload</p>
     *
     * @throws java.io.IOException if any.
     * @throws org.exolab.castor.xml.MarshalException if any.
     * @throws org.exolab.castor.xml.ValidationException if any.
     */
    public static void reload() throws IOException,MarshalException,ValidationException{
    	
    	String configFile = System.getProperty("opennms.home");
    	if(configFile.endsWith(java.io.File.separator)){
    		configFile = configFile.substring(0, configFile.length() - 1);
    	}
    	configFile += "/etc/QoSD-configuration.xml";

		config = CastorUtils.unmarshal(QoSDConfiguration.class, new FileSystemResource(configFile));
		
		is_loaded = true;
    }
    
    /**
     * <p>Getter for the field <code>config</code>.</p>
     *
     * @return a {@link org.openoss.opennms.spring.qosd.QoSDConfiguration} object.
     * @throws java.io.IOException if any.
     * @throws org.exolab.castor.xml.MarshalException if any.
     * @throws org.exolab.castor.xml.ValidationException if any.
     */
    public static QoSDConfiguration getConfig() throws IOException,MarshalException,ValidationException{
        if (!is_loaded) {
            reload();
        }
        return config;
    }
}