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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.rootfilter; |
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|
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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.componentmanager.*; |
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import uk.ac.ukc.iscream.clientinterface.*; |
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|
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/** |
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* The root filter is what all filters talk to |
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* Hosts cannot talk to this implementation of a filter. |
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* It provides hooks to all data interfaces for the system |
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* namely the client interface and the db interface. |
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* This is an i-scream component that starts the |
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* RootFilter services. |
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* |
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* @author $Author: ajm4 $ |
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* @version $Id: RootFilter.java,v 1.27 2001/02/26 02:15:11 ajm4 Exp $ |
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*/ |
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public class RootFilter implements Component { |
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|
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//---FINAL ATTRIBUTES--- |
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|
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/** |
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* The current CVS revision of this class |
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*/ |
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public static final String REVISION = "$Revision: 1.27 $"; |
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|
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//---STATIC METHODS--- |
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|
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//---CONSTRUCTORS--- |
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|
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//---PUBLIC METHODS--- |
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|
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/** |
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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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_refman = ReferenceManager.getInstance(); |
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_logger = ReferenceManager.getInstance().getLogger(); |
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|
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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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|
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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String configName = "RootFilter"; |
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|
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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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|
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// try and get the names of the ciReal and ciDB |
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String realInterface, dbInterface; |
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try { |
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realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName"); |
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dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName"); |
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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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realInterface = null; |
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dbInterface = null; |
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} |
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|
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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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} |
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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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|
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// setup a queue |
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Queue queue = new Queue(); |
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|
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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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|
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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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} |
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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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|
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_logger.write(toString(), Logger.SYSINIT, "started"); |
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|
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} |
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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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* 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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public String toString() { |
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return FormatName.getName( |
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NAME, |
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getClass().getName(), |
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REVISION); |
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} |
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|
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//---PRIVATE METHODS--- |
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|
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//---ACCESSOR/MUTATOR METHODS--- |
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|
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//---ATTRIBUTES--- |
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|
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/** |
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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; |
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|
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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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|
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//---STATIC ATTRIBUTES--- |
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|
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/** |
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* The friendly name for this component, used by |
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* all related classes. |
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* This is set from the configuration. |
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*/ |
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public static String NAME; |
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|
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} |
