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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: tdb1 $ |
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* @version $Id: RootFilter.java,v 1.17 2001/01/18 23:20:28 tdb1 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: 1.17 $"; |
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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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|
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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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|
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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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|
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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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} |
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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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|
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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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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Queue queue = new Queue(); |
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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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// !!!! TEMPORARY CODE !!!! |
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// Monitor the queue's status (queue 0 and 1 - big assumption!) |
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while(true) { |
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// wait 30 seconds |
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try { Thread.sleep(30000); } catch(Exception e) {} |
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int q0 = _queue.queueSize(0); |
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int q1 = _queue.queueSize(1); |
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int tot = _queue.elementCount(); |
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String message = "Queue status - queue1: "+q1+" queue2: "+q2+" total: "+tot; |
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_logger.write(toString(), Logger.DEBUG, message); |
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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 = ReferenceManager.getInstance().getLogger(); |
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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 = ReferenceManager.getInstance(); |
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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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} |
