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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.ac.ukc.iscream.client; |
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package uk.org.iscream.cms.server.client; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.clientinterface.*; |
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import uk.ac.ukc.iscream.componentmanager.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.util.*; |
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import uk.org.iscream.cms.server.clientinterface.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.util.*; |
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/** |
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* A startup component for the Local Clients. |
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* This class starts the CORBA client used for alerting |
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* purposes. It reads data using the ClientServant from CORBA |
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* calls by the i-scream client interface. This data is then |
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* used by the MonitorManager to pass to Monitors. Monitors then |
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* analyse the data and raise alerts if needed, these are passed to |
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* the Alerters, which send out alerts. They are looked after by |
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* the AlerterManager. |
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* |
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* @author $Author$ |
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* @version $Id$ |
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//---PUBLIC METHODS--- |
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/** |
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* This starts the Local Client component |
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* This starts the Local Client component. |
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* This starts the ClientServant, the MonitorManager and |
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* the AlerterManager, aswell as initialising any queues |
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* and obtaining any initial configuration. |
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* |
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* @throws ComponentStartException if the component fails to start |
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*/ |
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public void start() throws ComponentStartException { |
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// get references to key objects |
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_refman = ReferenceManager.getInstance(); |
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_logger = ReferenceManager.getInstance().getLogger(); |
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_logger = _refman.getLogger(); |
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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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// configuration variables we require |
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int queueMonitorInterval = 0; |
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Configuration config = _refman.getCM().getConfiguration("LocalClient"); |
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if (config == null) { |
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throw new ComponentStartException("Unable to obtain configuration for component"); |
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} |
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else { |
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try { |
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// get the configuration properties we need |
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queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval")); |
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} catch (org.omg.CORBA.MARSHAL e) { |
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throw new ComponentStartException("Unable to obtain requried configuration property for component"); |
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// get a reference to the configuration proxy |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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// see if these Queue's need a size limit |
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try { |
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int queueSizeLimit = Integer.parseInt(cp.getProperty(NAME, "Queue.SizeLimit")); |
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String queueRemoveAlgorithm = cp.getProperty(NAME, "Queue.RemoveAlgorithm"); |
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int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms); |
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if(algorithm != -1) { |
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_logger.write(toString(), Logger.DEBUG, "Starting 2 Queues with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm); |
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// we have valid values, so lets start it. |
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_alerterQueue = new Queue(queueSizeLimit, algorithm); |
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_monitorQueue = new Queue(queueSizeLimit, algorithm); |
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} |
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else { |
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_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm); |
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// just don't activate a limit |
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_alerterQueue = new Queue(); |
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_monitorQueue = new Queue(); |
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} |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e); |
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// just don't activate a limit |
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_alerterQueue = new Queue(); |
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_monitorQueue = new Queue(); |
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} catch (NumberFormatException e) { |
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_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e); |
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// just don't activate a limit |
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_alerterQueue = new Queue(); |
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_monitorQueue = new Queue(); |
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} |
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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// setup the queues, this must be done before both managers are setup |
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String queueName; |
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// setup a Queue for the servant -> monitor manager |
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_monitorQueue = new Queue(); |
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// startup monitors on these queues |
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try { |
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// try to get the interval, if this fails, we won't start up the monitor |
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int queueMonitorInterval = Integer.parseInt(cp.getProperty(NAME, "Queue.MonitorInterval")); |
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_alerterQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Alerter"); |
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_monitorQueue.startMonitor(queueMonitorInterval*1000, _monitorQueue, NAME + " Monitor"); |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e); |
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} |
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// setup a Queue for the monitors -> alert manager |
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_alerterQueue = new Queue(); |
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// setup the servant and connect |
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_logger.write(toString(), Logger.SYSINIT, "starting servant and connecting"); |
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try { |
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monMan.start(); |
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// setup the AlerterManager |
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AlerterManager alertMan = AlerterManager.getInstance(); |
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alertMan.start(); |
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_logger.write(toString(), Logger.SYSINIT, "started"); |
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} |
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/** |
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* Does a dependency check. Used mainly at startup to |
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* see if the required dependencies (components) are up |
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* and running. |
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* |
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* @return a boolean value, true if the depdencies are satisfied |
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*/ |
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public boolean depCheck() { |
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try { |
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org.omg.CORBA.Object obj; |
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// first check the ConfigurationManager is alive |
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obj = _refman.getCORBARef("iscream.ConfigurationManager"); |
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// then get some info on the CLI |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName"); |
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// finally check the CLI is alive |
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obj = _refman.getCORBARef("iscream.ClientInterface." + cli); |
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} catch(ComponentCORBAException e) { |
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System.err.println(toString() + ": Dependency Failure: "+e); |
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return false; |
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} catch(PropertyNotFoundException e) { |
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System.err.println(toString() + ": Unable to obtain configuration: "+e); |
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return false; |
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} |
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// dependency check suceeded |
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return true; |
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} |
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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.ac.ukc.iscream.util.FormatName class |
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* This uses the uk.org.iscream.cms.server.util.FormatName 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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* A reference to the reference manager in use |
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*/ |
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private ReferenceManager _refman; |
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private ReferenceManager _refman = ReferenceManager.getInstance(); |
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//---STATIC ATTRIBUTES--- |
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