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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filter; |
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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.filter.*; |
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|
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/** |
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* A Filter Startup Class |
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* A filter is an iscream component. |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: FilterMain.java,v 1.19 2001/01/18 23:17:58 tdb1 Exp $ |
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*/ |
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public class FilterMain 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: 1.19 $"; |
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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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/** |
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* Constructs a Filter with the name given |
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* |
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* @param givenName the name |
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*/ |
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public FilterMain(String givenName) { |
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NAME = givenName; |
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} |
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|
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//---PUBLIC METHODS--- |
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|
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/** |
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* Starts the Filter component |
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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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int UDPListenPort = 0; |
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int TCPListenPort = 0; |
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String parentFilterName = null; |
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|
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Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME); |
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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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UDPListenPort = Integer.parseInt(config.getProperty("Filter.UDPListenPort")); |
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TCPListenPort = Integer.parseInt(config.getProperty("Filter.TCPListenPort")); |
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parentFilterName = config.getProperty("Filter.parentFilter"); |
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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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} |
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} |
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|
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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|
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// get parent |
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Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName)); |
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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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// Start a filter thread |
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_logger.write(toString(), Logger.SYSINIT, "starting Filter Thread / Queue consumer"); |
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FilterThread filterThread = new FilterThread(queue, parentFilter); |
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filterThread.start(); |
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|
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// FilterServant start (for inbound child filter data) |
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_logger.write(toString(), Logger.DEBUG, "starting Filter Child -> Parent link for upstream parent - " + parentFilterName); |
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FilterServant filterServant = new FilterServant(TCPListenPort, UDPListenPort, queue); |
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_refman.bindToOrb(filterServant, "iscream.Filter." + FilterMain.NAME); |
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|
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// UDL Reader start (for inbound host data) |
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_logger.write(toString(), Logger.SYSINIT, "starting Filter UDP listener"); |
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UDPReader udpReader = new UDPReader(UDPListenPort, queue); |
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udpReader.start(); |
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|
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// TCP Reader start (for heartbeats) |
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_logger.write(toString(), Logger.SYSINIT, "starting Filter TCP listener"); |
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TCPReader tcpReader = new TCPReader(TCPListenPort, queue); |
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tcpReader.start(); |
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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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* 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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} |
