/*******************************************************************************
* This file is part of OpenNMS(R).
*
* Copyright (C) 2010-2011 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.IOException;
import java.io.InputStream;
import java.net.InetAddress;
import java.util.ArrayList;
import java.util.List;
import java.util.concurrent.locks.Lock;
import java.util.concurrent.locks.ReadWriteLock;
import java.util.concurrent.locks.ReentrantReadWriteLock;
import org.exolab.castor.xml.MarshalException;
import org.exolab.castor.xml.ValidationException;
import org.opennms.core.utils.ConfigFileConstants;
import org.opennms.core.utils.InetAddressUtils;
import org.opennms.core.utils.LogUtils;
import org.opennms.core.xml.CastorUtils;
import org.opennms.netmgt.config.snmpAsset.adapter.AssetField;
import org.opennms.netmgt.config.snmpAsset.adapter.SnmpAssetAdapterConfiguration;
/**
* <p>Abstract RancidAdapterConfigManager class.</p>
*
* @author <a href="mailto:antonio@openms.it">Antonio Russo</a>
* @author <a href="mailto:brozow@openms.org">Mathew Brozowski</a>
* @author <a href="mailto:david@opennms.org">David Hustace</a>
* @version $Id: $
*/
public class SnmpAssetAdapterConfigManager implements SnmpAssetAdapterConfig {
private final ReadWriteLock m_globalLock = new ReentrantReadWriteLock();
private final Lock m_readLock = m_globalLock.readLock();
private final Lock m_writeLock = m_globalLock.writeLock();
private long m_lastModified;
/**
* The config class loaded from the config file
*/
private SnmpAssetAdapterConfiguration m_config;
/**
* <p>Constructor for RancidAdapterConfigManager.</p>
*/
public SnmpAssetAdapterConfigManager() {
}
/**
* <p>Constructor for RancidAdapterConfigManager.</p>
*
* @author <a href="mailto:antonio@opennms.org">Antonio Russo</a>
* @param reader a {@link java.io.InputStream} object.
* @param verifyServer a boolean.
* @throws org.exolab.castor.xml.MarshalException if any.
* @throws org.exolab.castor.xml.ValidationException if any.
* @throws java.io.IOException if any.
* @param serverName a {@link java.lang.String} object.
*/
public SnmpAssetAdapterConfigManager(final long lastModified, final InputStream reader) throws MarshalException, ValidationException, IOException {
reloadXML(lastModified, reader);
}
public Lock getReadLock() {
return m_readLock;
}
public Lock getWriteLock() {
return m_writeLock;
}
/**
* Synchronized so that we update the timestamp of the file and the contents
* simultaneously.
*
* @param reader a {@link java.io.InputStream} object.
* @throws org.exolab.castor.xml.MarshalException if any.
* @throws org.exolab.castor.xml.ValidationException if any.
* @throws java.io.IOException if any.
*/
protected void reloadXML(final long lastModified, final InputStream reader) throws MarshalException, ValidationException, IOException {
getWriteLock().lock();
try {
m_config = CastorUtils.unmarshal(SnmpAssetAdapterConfiguration.class, reader);
m_lastModified = lastModified;
} finally {
getWriteLock().unlock();
}
}
/**
* <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 {
getWriteLock().lock();
try {
final File cfgFile = ConfigFileConstants.getFile(ConfigFileConstants.SNMP_ASSET_ADAPTER_CONFIG_FILE_NAME);
final long lastModified = cfgFile.lastModified();
if (lastModified > m_lastModified) {
LogUtils.debugf(this, "init: config file path: %s", cfgFile.getPath());
reloadXML(lastModified, new FileInputStream(cfgFile));
LogUtils.debugf(this, "init: finished loading config file: %s", cfgFile.getPath());
}
} finally {
getWriteLock().unlock();
}
}
/**
* Return the configuration object.
*
* @return a {@link org.opennms.netmgt.config.snmpAsset.adapter.SnmpAssetAdapterConfiguration} object.
*/
protected SnmpAssetAdapterConfiguration getConfiguration() {
getReadLock().lock();
try {
return m_config;
} finally {
getReadLock().unlock();
}
}
/**
* Returns all {@link AssetField} objects that are in packages that match the specified
* sysoid precisely based on the <sysoid> tag or by starting with the content of the
* <sysoidMask> tag.
*
* TODO: Support matching based on IP address
*/
public AssetField[] getAssetFieldsForAddress(final InetAddress address, final String sysoid) {
getReadLock().lock();
try {
if (sysoid == null) {
// If the sysoid is null, we won't be able to fetch any SNMP attributes;
// return an empty list.
LogUtils.debugf(this, "getAssetFieldsForAddress: SNMP sysoid was null for address %s, returning empty list", InetAddressUtils.str(address));
return new AssetField[0];
}
final List<AssetField> retval = new ArrayList<AssetField>();
for (final org.opennms.netmgt.config.snmpAsset.adapter.Package pkg : m_config.getPackageCollection()) {
final String pkgSysoid = pkg.getPackageChoice().getSysoid();
final String pkgSysoidMask = pkg.getPackageChoice().getSysoidMask();
if (pkgSysoid != null) {
if (pkgSysoid.equals(sysoid)) {
retval.addAll(pkg.getAssetFieldCollection());
}
} else if (pkgSysoidMask != null) {
if (sysoid.startsWith(pkgSysoidMask)) {
retval.addAll(pkg.getAssetFieldCollection());
}
} else {
LogUtils.warnf(this, "getAssetFieldsForAddress: Unexpected condition: both sysoid and sysoidMask are null on package %s", pkg.getName());
}
}
if (retval.size() == 0) {
LogUtils.debugf(this, "getAssetFieldsForAddress: Zero AssetField matches returned for %s with sysoid: %s", InetAddressUtils.str(address), sysoid);
}
return retval.toArray(new AssetField[0]);
} finally {
getReadLock().unlock();
}
}
}