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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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* @author $Author$ |
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* @version $Id$ |
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*/ |
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public class FilterMain implements uk.ac.ukc.iscream.util.Component { |
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public class FilterMain implements Component { |
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//---FINAL ATTRIBUTES--- |
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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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// 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.write(toString(), Logger.SYSINIT, "coming up"); |
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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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int queueMonitorInterval = 0; |
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Configuration config = _refman.getCM().getConfiguration(FilterMain.NAME); |
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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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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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queueMonitorInterval = Integer.parseInt(config.getProperty("Queue.MonitorInterval")); |
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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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throw new ComponentStartException("Unable to obtain requried configuration property for component"); |
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} |
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} |
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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// get parent |
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Filter parentFilter = FilterHelper.narrow(_refman.getCORBARef("iscream.Filter." + parentFilterName)); |
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// setup a queue |
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Queue queue = new Queue(); |
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// startup a monitor on this queue, every minute |
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String queueName = NAME + " Filter"; |
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queue.startMonitor(queueMonitorInterval*1000, queueName); |
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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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// 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(parentFilter, TCPListenPort, UDPListenPort); |
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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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// 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, parentFilter); |
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UDPReader udpReader = new UDPReader(UDPListenPort, queue); |
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udpReader.start(); |
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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, parentFilter); |
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TCPReader tcpReader = new TCPReader(TCPListenPort, queue); |
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tcpReader.start(); |
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_logger.write(toString(), Logger.SYSINIT, "started"); |
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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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private ReferenceManager _refman = ReferenceManager.getInstance(); |
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private ReferenceManager _refman; |
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//---STATIC ATTRIBUTES--- |
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*/ |
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public static String NAME; |
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} |
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} |
