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/* |
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* i-scream central monitoring system |
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* http://www.i-scream.org.uk |
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* Copyright (C) 2000-2002 i-scream |
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* |
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* This program is free software; you can redistribute it and/or |
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* modify it under the terms of the GNU General Public License |
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* as published by the Free Software Foundation; either version 2 |
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* of the License, or (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program; if not, write to the Free Software |
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* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.client.monitors; |
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package uk.org.iscream.cms.server.client.monitors; |
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//---IMPORTS--- |
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import java.util.HashMap; |
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import java.util.Iterator; |
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import uk.org.iscream.client.*; |
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import uk.org.iscream.core.*; |
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import uk.org.iscream.util.*; |
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import uk.org.iscream.componentmanager.*; |
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import java.util.StringTokenizer; |
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import uk.org.iscream.cms.server.client.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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/** |
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* This Monitor watches heartbeats. |
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*/ |
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public Heartbeat__Monitor() { |
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super(); |
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createInitialHosts(); |
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new HeartbeatWorker().start(); |
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} |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
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* method to provide clean logging (every class should have this). |
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* |
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* This uses the uk.org.iscream.util.NameFormat class |
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* This uses the uk.org.iscream.cms.util.NameFormat class |
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* to format the toString() |
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* |
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* @return the name of this class and its CVS revision |
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} |
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} |
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return Alert.thresholdNORMAL; |
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} |
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|
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/** |
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* Gets an initial list of hosts from the config |
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* and adds a fake set of heartbeats for them. |
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* If the hosts don't respond within the timeout |
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* period an alert will be raised. |
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* |
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* The effect of this is to allow us to know about |
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* hosts which weren't on when we started up, and |
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* will thus never have generated a heartbeat - yet |
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* will still want to know they're not responding. |
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*/ |
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private void createInitialHosts() { |
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// get the initial list of hosts from the config |
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String initialHosts = ""; |
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try { |
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initialHosts = _cp.getProperty(_name, "Monitor.Heartbeat.initialHosts"); |
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} catch (PropertyNotFoundException e) { |
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// just leave initialHosts empty |
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_logger.write(Heartbeat__Monitor.this.toString(), Logger.DEBUG, "No initial list of hosts set, defaulting to none."); |
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} |
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|
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// parse through the initial hosts adding them |
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StringTokenizer st = new StringTokenizer(initialHosts, ";"); |
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while (st.hasMoreTokens()) { |
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String source = st.nextToken(); |
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// check if they already exist, don't want to add them twice |
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if (!_hosts.containsKey(source)) { |
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synchronized(this) { |
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_hosts.put(source, new HeartbeatHolder(new Register(source, _name))); |
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} |
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} |
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HeartbeatHolder lastHeartbeat = (HeartbeatHolder) _hosts.get(source); |
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// set a "fake" heartbeat |
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lastHeartbeat.setLastHeartbeat(System.currentTimeMillis()/1000); |
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} |
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} |
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//---ACCESSOR/MUTATOR METHODS--- |
