snmpthresholder.java

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//
// This file is part of the OpenNMS(R) Application.
//
// OpenNMS(R) is Copyright (C) 2002-2003 The OpenNMS Group, Inc.  All rights reserved.
// OpenNMS(R) is a derivative work, containing both original code, included code and modified
// code that was published under the GNU General Public License. Copyrights for modified 
// and included code are below.
//
// OpenNMS(R) is a registered trademark of The OpenNMS Group, Inc.
//
// Modifications:
//
// 2005 Jan 03: minor mod to support lame SNMP hosts
// 2003 Jan 31: Cleaned up some unused imports.
// 2002 Oct 22: Added a threshold rearm event.
// 2002 Jul 08: Modified code to allow for Threshold-based event notifications.
//
// Original code base Copyright (C) 1999-2001 Oculan Corp.  All rights reserved.
//
// This program 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 2 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 General Public License for more details.                                                            
//
// You should have received a copy of the GNU General Public License
// along with this program; if not, write to the Free Software
// Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.
//       
// For more information contact: 
//      OpenNMS Licensing       <[e-mail]>
//      http://www.opennms.org/
//      http://www.opennms.com/
//

package org.opennms.netmgt.threshd;

import java.io.File;
import java.io.FileInputStream;
import java.io.FileNotFoundException;
import java.io.IOException;
import java.lang.NullPointerException;
import java.lang.reflect.UndeclaredThrowableException;
import java.net.InetAddress;
import java.net.UnknownHostException;
import java.sql.PreparedStatement;
import java.sql.ResultSet;
import java.sql.SQLException;
import java.util.Date;
import java.util.HashMap;
import java.util.Iterator;
import java.util.Map;
import java.util.Properties;

import org.apache.log4j.Category;
import org.apache.log4j.Priority;
import org.opennms.core.utils.ThreadCategory;
import org.opennms.netmgt.EventConstants;
import org.opennms.netmgt.capsd.DbIpInterfaceEntry;
import org.opennms.netmgt.config.DatabaseConnectionFactory;
import org.opennms.netmgt.config.ThresholdingConfigFactory;
import org.opennms.netmgt.config.threshd.Threshold;
import org.opennms.netmgt.poller.monitors.NetworkInterface;
import org.opennms.netmgt.rrd.RrdException;
import org.opennms.netmgt.rrd.RrdUtils;
import org.opennms.netmgt.utils.EventProxy;
import org.opennms.netmgt.utils.EventProxyException;
import org.opennms.netmgt.utils.IfLabel;
import org.opennms.netmgt.utils.ParameterMap;
import org.opennms.netmgt.utils.RrdFileConstants;
import org.opennms.netmgt.xml.event.Event;
import org.opennms.netmgt.xml.event.Events;
import org.opennms.netmgt.xml.event.Log;
import org.opennms.netmgt.xml.event.Parm;
import org.opennms.netmgt.xml.event.Parms;
import org.opennms.netmgt.xml.event.Value;
import org.opennms.protocols.snmp.SnmpSession;

/**
 * <P>
 * The SnmpThresholder class ...
 * </P>
 * 
 * @author <A HREF="mailto:[e-mail]">Mike Davidson </A>
 * @author <A HREF="http://www.opennms.org/">OpenNMS </A>
 * 
 */
final class SnmpThresholder implements ServiceThresholder {
    /**
     * SQL statement to retrieve interface's 'ipinterface' table information.
     */
    private static final String SQL_GET_NODEID = "SELECT nodeid,ifindex,issnmpprimary FROM ipinterface WHERE ipAddr=? AND ismanaged!='D'";

    /**
     * Name of monitored service.
     */
    private static final String SERVICE_NAME = "SNMP";

    /**
     * Default thresholding interval (in milliseconds).
     * 
     */
    private static final int DEFAULT_INTERVAL = 300000; // 300s or 5m
    
    /**
     * Default age before which a data point is considered "out of date"
     */
    
    private static final int DEFAULT_RANGE = 0; // 300s or 5m
    

    /**
     * Interface attribute key used to store the interface's node id
     */
    static final String NODE_ID_KEY = "org.opennms.netmgt.collectd.SnmpThresholder.NodeId";

    /**
     * Interface attribute key used to store the interface's node id
     */
    static final String RRD_REPOSITORY_KEY = "org.opennms.netmgt.collectd.SnmpThresholder.RrdRepository";

    /**
     * Interface attribute key used to store a map of node level ThresholdEntity
     * objects keyed by datasource name.
     */
    static final String NODE_THRESHOLD_MAP_KEY = "org.opennms.netmgt.collectd.SnmpThresholder.NodeThresholdMap";

    /**
     * Interface attribute key used to store a map of interface level
     * ThresholdEntity objects keyed by datasource name.
     */
    static final String BASE_IF_THRESHOLD_MAP_KEY = "org.opennms.netmgt.collectd.SnmpThresholder.IfThresholdMap";

    /**
     * We must maintain a map of interface level ThresholdEntity objects on a
     * per interface basis in order to maintain separate exceeded counts and the
     * like for each of a node's interfaces. This interface attribute key used
     * to store a map of interface level ThresholdEntity object maps keyed by
     * ifLabel. So it wil refer to a map of maps indexed by ifLabel.
     */
    static final String ALL_IF_THRESHOLD_MAP_KEY = "org.opennms.netmgt.collectd.SnmpThresholder.AllIfThresholdMap";

    /**
     * Local host name
     */
    private String m_host;

    /**
     * <P>
     * Returns the name of the service that the plug-in collects ("SNMP").
     * </P>
     * 
     * @return The service that the plug-in collects.
     */
    public String serviceName() {
        return SERVICE_NAME;
    }

    /**
     * <P>
     * Initialize the service thresholder.
     * </P>
     * 
     * @param parameters
     *            Not currently used.
     * 
     * @exception RuntimeException
     *                Thrown if an unrecoverable error occurs that prevents the
     *                plug-in from functioning.
     * 
     */
    public void initialize(Map parameters) {
        // Log4j category
        //
        Category log = ThreadCategory.getInstance(getClass());

        // Get local host name (used when generating threshold events)
        //
        try {
            m_host = InetAddress.getLocalHost().getHostName();
        } catch (UnknownHostException e) {
            if (log.isEnabledFor(Priority.WARN))
                log.warn("initialize: Unable to resolve local host name.", e);
            m_host = "unresolved.host";
        }

        try {
            RrdUtils.initialize();
        } catch (RrdException e) {
            if (log.isEnabledFor(Priority.ERROR))
                log.error("initialize: Unable to initialize RrdUtils", e);
            throw new RuntimeException("Unable to initialize RrdUtils", e);
        }

        if (log.isDebugEnabled())
            log.debug("initialize: successfully instantiated JNI interface to RRD...");

        return;
    }

    /**
     * Responsible for freeing up any resources held by the thresholder.
     */
    public void release() {
        // Nothing to release...
    }

    /**
     * Responsible for performing all necessary initialization for the specified
     * interface in preparation for thresholding.
     * 
     * @param iface
     *            Network interface to be prepped for thresholding.
     * @param parameters
     *            Key/value pairs associated with the package to which the
     *            interface belongs..
     * 
     */
    public void initialize(NetworkInterface iface, Map parameters) {
        Category log = ThreadCategory.getInstance(getClass());

        // Get interface address from NetworkInterface
        //
        if (iface.getType() != NetworkInterface.TYPE_IPV4)
            throw new RuntimeException("Unsupported interface type, only TYPE_IPV4 currently supported");

        InetAddress ipAddr = (InetAddress) iface.getAddress();

        // Retrieve the name of the thresholding group associated
        // with this interface.
        String groupName = ParameterMap.getKeyedString(parameters, "thresholding-group", "default");

        // Get the threshold group's RRD repository path
        // 
        String repository = null;
        try {
            repository = ThresholdingConfigFactory.getInstance().getRrdRepository(groupName);
        } catch (IllegalArgumentException e) {
            throw new RuntimeException("Thresholding group '" + groupName + "' does not exist.");
        }

        // Add RRD repository as an attribute of the interface for retrieval
        // by the check() method.
        //
        iface.setAttribute(RRD_REPOSITORY_KEY, repository);

        // Retrieve the collection of Threshold objects associated with
        // the defined thresholding group and build two maps, one consisting
        // of node level ThresholdEntity objects and another consisting of
        // interface level ThresholdEntity objects both keyed by datasource
        // name.
        //
        // Each ThresholdEntity can wrap one high Threshold and one low
        // Threshold castor-generated object for a single datasource.
        // If more than one high or more than one low threshold is defined
        // for a single datasource a warning messages is generated. Only
        // the first threshold in such a scenario will be used for thresholding.
        //
        Map nodeMap = new HashMap();
        Map baseIfMap = new HashMap();
        try {