org.jboss.monitor.alarm.Alarm Maven / Gradle / Ivy
/*
* JBoss, Home of Professional Open Source.
* Copyright 2008, Red Hat Middleware LLC, and individual contributors
* as indicated by the @author tags. See the copyright.txt file in the
* distribution for a full listing of individual contributors.
*
* This 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 2.1 of
* the License, or (at your option) any later version.
*
* This software 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 software; if not, write to the Free
* Software Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA
* 02110-1301 USA, or see the FSF site: http://www.fsf.org.
*/
package org.jboss.monitor.alarm;
/**
* Alarm Constants.
*
* An alarm can be of two types:
*
* Stateless, when the producing MBean keeps no state about the occurence
* of the alarm. The produced alarm notification must have alarmState STATE_NONE
* and the valid severities are SEVERITY_NORMAL -> SEVERITY_UNKNOWN
*
* Stateful, when the producing MBean keeps state about the occurence
* of the alarm. The first notification must carry alarmState STATE_CREATED,
* with valid severities SEVERITY_WARNING -> SEVERITY_UNKNOWN. Any change
* in the alarm (severity) must generate an alarm notification with alarmState
* STATE_CHANGED and valid severities SEVERITY_WARNING -> SEVERITY_UNKNOWN.
* The clearance of the alarm must be indicates with an alarm notification
* with alarmState STATE_CLEARED and a severity of SEVERITY_NORMAL.
*
* This complexity is required in order to be able to easily correlate
* alarms and associaty the generation and clearence of system faults.
*
* @author Dimitris Andreadis
* @version $Revision: 81038 $
*/
public interface Alarm
{
// Constants -----------------------------------------------------
/** default server id */
public static final String DEFAULT_SERVER_ID = "jboss";
/** the possible states of an alarm */
public static final int STATE_CLEARED = 0;
public static final int STATE_CHANGED = 1;
public static final int STATE_CREATED = 2;
public static final int STATE_NONE = 3;
/** stringfied alarm states */
public static final String[] STATE_STRINGS = {
"CLEARED", "CHANGED", "CREATED", "NONE"
};
/** the possible severities of an alarm */
public static final int SEVERITY_NORMAL = 0;
public static final int SEVERITY_WARNING = 1;
public static final int SEVERITY_MINOR = 2;
public static final int SEVERITY_MAJOR = 3;
public static final int SEVERITY_CRITICAL = 4;
public static final int SEVERITY_UNKNOWN = 5;
/** stringfied severities */
public static final String[] SEVERITY_STRINGS = {
"NORMAL", "WARNING", "MINOR", "MAJOR", "CRITICAL", "UNKNOWN"
};
}