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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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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.rootfilter; |
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package uk.org.iscream.cms.server.rootfilter; |
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.util.*; |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.clientinterface.*; |
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import uk.org.iscream.cms.util.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import uk.org.iscream.cms.server.clientinterface.*; |
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/** |
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* The root filter is what all filters talk to |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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public class RootFilter implements uk.ac.ukc.iscream.util.Component { |
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public class RootFilter implements Component { |
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//---FINAL ATTRIBUTES--- |
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* This starts the Root Filter for the system |
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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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_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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String ourName = null; |
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String realInterface = null; |
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String dbInterface = null; |
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Configuration config = _refman.getCM().getConfiguration("RootFilter"); |
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if (config == null) { |
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System.err.println("CRITICAL:Unable to obtain configuration" + |
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"\n Advise you check the i-scream log for more information."); |
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_logger.write(toString(), Logger.FATAL, "ERROR - unable to obtain configuration"); |
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System.exit(1); |
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} else { |
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try { |
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ourName = config.getProperty("RootFilter.name"); |
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realInterface = config.getProperty("RootFilter.realtimeInterfaceName"); |
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dbInterface = config.getProperty("RootFilter.dbInterfaceName"); |
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} catch (org.omg.CORBA.MARSHAL e) { |
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System.err.println ("CRITICAL:Unable to obtain required configuration property" + |
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"\n Advise you check the i-scream log for more information."); |
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_logger.write(toString(), Logger.FATAL, "ERROR - required configuration property not present"); |
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System.exit(1); |
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} |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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String configName = "RootFilter"; |
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// set the name of the root filter |
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try { |
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NAME = cp.getProperty(configName, "RootFilter.name"); |
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} catch (PropertyNotFoundException e) { |
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NAME = null; |
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_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e); |
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} |
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// now we have the name of the Root Filter we set it |
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NAME = ourName; |
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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ClientInterface ciReal = null, ciDB = null; |
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// get reference to the client interfaces - the real time one |
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if (realInterface != null) { |
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ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface)); |
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// setup a queue |
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Queue queue; |
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// see if this Queue needs a size limit |
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try { |
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int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit")); |
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String queueRemoveAlgorithm = cp.getProperty(configName, "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 Queue 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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queue = 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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queue = 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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queue = 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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queue = new Queue(); |
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} |
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// get reference to the client interfaces - and the db one |
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if (dbInterface != null) { |
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ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface)); |
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} |
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Queue queue = new Queue(); |
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if (realInterface == null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface); |
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CIWrapper c = new CIWrapper(ciDB, queue); |
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c.start(); |
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} else if (dbInterface == null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface); |
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CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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} else { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface); |
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CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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c = new CIWrapper(ciDB, queue); |
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c.start(); |
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// startup a monitor on this queue |
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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(configName, "Queue.MonitorInterval")); |
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String queueName = NAME + " RootFilter"; |
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queue.startMonitor(queueMonitorInterval*1000, queueName); |
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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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// RootFilterServant start (for inbound child filter data) |
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_logger.write(toString(), Logger.DEBUG, "starting Root Filter"); |
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RootFilterServant filterServant = new RootFilterServant(queue); |
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// bind to the naming service as a filter |
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_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME); |
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_refman.bindToOrb(filterServant, "iscream.Filter\\." + RootFilter.NAME); |
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// Startup the CORBA Listener |
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_logger.write(toString(), Logger.DEBUG, "starting servant for inbound clients"); |
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CorbaClientListenerServant corbaServant = new CorbaClientListenerServant(queue); |
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_refman.bindToOrb(corbaServant, "iscream.ClientInterface\\." + RootFilter.NAME); |
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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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org.omg.CORBA.Object obj; |
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// first we need to check the Configuration system is available |
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try { |
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// first check the ConfigurationManager is alive |
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obj = _refman.getCORBARef("iscream.ConfigurationManager"); |
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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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} |
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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.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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* This holds a reference to the |
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* system logger that is being used. |
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*/ |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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private Logger _logger; |
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/** |
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* A reference to the reference manager in use |
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*/ |
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public static String NAME; |
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} |
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} |
