/*******************************************************************************
* 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.opennms.netmgt.config;
import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStreamWriter;
import java.io.Writer;
import org.apache.commons.io.IOUtils;
import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.ValidationException;
import org.opennms.core.utils.ConfigFileConstants;
/**
* <p>ChartConfigFactory class.</p>
*
* @author david
* @version $Id: $
*/
public class ChartConfigFactory extends ChartConfigManager {
private static boolean m_initialized = false;
private static ChartConfigFactory m_instance = null;
private static File m_chartConfigFile;
private static long m_lastModified;
/**
* <p>init</p>
*
* @throws org.exolab.castor.xml.MarshalException if any.
* @throws org.exolab.castor.xml.ValidationException if any.
* @throws java.io.FileNotFoundException if any.
* @throws java.io.IOException if any.
*/
public static synchronized void init() throws MarshalException, ValidationException, FileNotFoundException, IOException {
if (!m_initialized) {
m_instance = new ChartConfigFactory();
reload();
m_initialized = true;
}
}
/**
* <p>reload</p>
*
* @throws java.io.IOException if any.
* @throws java.io.FileNotFoundException if any.
* @throws org.exolab.castor.xml.MarshalException if any.
* @throws org.exolab.castor.xml.ValidationException if any.
*/
public static synchronized void reload() throws IOException, FileNotFoundException, MarshalException, ValidationException {
m_chartConfigFile = ConfigFileConstants.getFile(ConfigFileConstants.CHART_CONFIG_FILE_NAME);
InputStream configIn = null;
try {
configIn = new FileInputStream(m_chartConfigFile);
m_lastModified = m_chartConfigFile.lastModified();
parseXml(configIn);
} finally {
if (configIn != null) {
IOUtils.closeQuietly(configIn);
}
}
}
/** {@inheritDoc} */
protected void saveXml(String xml) throws IOException {
if (xml != null) {
Writer fileWriter = new OutputStreamWriter(new FileOutputStream(m_chartConfigFile), "UTF-8");
fileWriter.write(xml);
fileWriter.flush();
fileWriter.close();
}
}
/**
* <p>update</p>
*
* @throws java.io.IOException if any.
* @throws org.exolab.castor.xml.MarshalException if any.
* @throws org.exolab.castor.xml.ValidationException if any.
*/
public void update() throws IOException, MarshalException, ValidationException {
if (m_lastModified != m_chartConfigFile.lastModified()) {
NotifdConfigFactory.getInstance().reload();
}
}
/**
* <p>getInstance</p>
*
* @return a {@link org.opennms.netmgt.config.ChartConfigFactory} object.
*/
public static ChartConfigFactory getInstance() {
if (!m_initialized) {
throw new IllegalStateException("Factory not initialized");
}
return m_instance;
}
/**
* <p>setInstance</p>
*
* @param instance a {@link org.opennms.netmgt.config.ChartConfigFactory} object.
*/
public static void setInstance(ChartConfigFactory instance) {
m_instance = instance;
m_initialized = true;
}
}