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//---PACKAGE DECLARATION--- |
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|
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//---IMPORTS--- |
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import uk.ac.ukc.iscream.core.*; |
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import uk.ac.ukc.iscream.filter.*; |
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import org.omg.CORBA.*; |
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import org.omg.CosNaming.*; |
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import org.omg.PortableServer.*; |
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|
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/** |
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* A Filter Startup Class |
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* |
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* @author $Author: tdb1 $ |
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* @version $Id: FilterMain.java,v 1.6 2000/11/23 01:44:05 tdb1 Exp $ |
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*/ |
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class FilterMain { |
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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: 1.6 $"; |
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|
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//---STATIC METHODS--- |
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|
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public static void main(String[] args) { |
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System.setProperty("org.omg.CORBA.ORBClass","jacorb.orb.ORB"); |
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System.setProperty("org.omg.CORBA.ORBSingletonClass","jacorb.orb.ORBSingleton"); |
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|
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// get our name from the command line |
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String ourName = ""; |
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if (args.length == 1) { |
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ourName = args[0]; |
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} |
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else { |
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usage(); |
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} |
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|
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// can't have a real toString() :) |
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String toString = "Filter{" + ourName + "}(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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|
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try { |
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ORB orb = ORB.init(args, null); |
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|
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// something to hold objects |
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org.omg.CORBA.Object objRef = null; |
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|
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// get the Root POA |
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objRef = orb.resolve_initial_references("RootPOA"); |
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POA poa = POAHelper.narrow(objRef); |
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|
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// get a hook to the name service |
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objRef = orb.resolve_initial_references("NameService"); |
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NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef); |
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|
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// get a ref to the ConfigurationManager, Logger & the FilterManager |
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|
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objRef = ncRef.resolve(ncRef.to_name("iscream.ConfigurationManager")); |
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ConfigurationManager configManager = ConfigurationManagerHelper.narrow(objRef); |
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|
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objRef = ncRef.resolve(ncRef.to_name("iscream.Logger")); |
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Logger logger = LoggerHelper.narrow(objRef); |
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|
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logger.write(toString, Logger.SYSINIT, "coming up"); |
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|
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|
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// **** THIS SECTION WILL NEED CHANGING TO GET RELEVANT CONFIG |
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// **** Please ignore this block of code, it's just "copy/paste" :) |
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|
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// get the config |
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Configuration myConfig = configManager.getConfiguration(ourName); |
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|
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// read some config here |
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int port = 0; |
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String parentFilterName = null; |
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|
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// did we? |
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if (myConfig == null) { |
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System.out.println("Failed: is it there?, can you read it?"); |
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System.exit(1); |
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} else { |
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|
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// get the property |
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try { |
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//QUERY HERE.... ??? |
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port = new Integer(myConfig.getProperty("Filter.listenPort")).intValue(); |
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parentFilterName = myConfig.getProperty("Filter.parentFilter"); |
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} catch (org.omg.CORBA.MARSHAL e) { |
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System.out.println("Caught org.omg.CORBA.MARSHAL, must be a null we got back"); |
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//System.exit(1); |
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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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// **** END COMMENT |
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|
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// **** INITIAL FILTER MANAGER COMMUNICATIONS HERE |
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|
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// get a root (CHANGE to use FilterManager) |
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objRef = ncRef.resolve(ncRef.to_name("iscream.Filter." + parentFilterName)); |
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Filter parentFilter = FilterHelper.narrow(objRef); |
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|
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// SETUP our Servant |
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|
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// create the FilterServant |
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FilterServant filterServant = new FilterServant(logger, parentFilter, ourName, new Integer(port).toString() , new Integer(port).toString()); |
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|
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// register ourselves |
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|
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// and advertise it to the naming context |
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objRef = poa.servant_to_reference(filterServant); |
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ncRef.bind(ncRef.to_name("iscream.Filter."+ourName), objRef); |
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|
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// **** END COMMENT |
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|
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// END SETUP |
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|
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|
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/************************************************************** |
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Here would be an ideal place to start another thread to do |
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the listening part of the Filter. Ideally it should just be |
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created and then run(). It may be necessary to pass some of |
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the following parameters into the thread by the constructor. |
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|
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Logger logger |
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- a reference to a Logger object |
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FilterManager filterManager |
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- a reference to the system filter manager |
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ConfigurationManager configManager |
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- a reference to the system configuration manager |
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Configuration myConfig |
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- a reference to the configuration object for this |
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filter instance |
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String ourName |
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- our "identifier" name |
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|
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**************************************************************/ |
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|
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logger.write(toString, Logger.SYSINIT, "starting Filter UDP listener"); |
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UDPReader udpReader = new UDPReader(port, parentFilter, logger); |
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udpReader.start(); |
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logger.write(toString, Logger.SYSINIT, "Filter UDP listener started"); |
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|
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// TEST |
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parentFilter.receiveXML("<?xml version=\"1.0\" encoding=\"ISO8859-1\"?><packet><test>This is just a debugging test, we ("+ourName+") are live on port: "+port+"</test></packet>"); |
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|
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// start the POA off |
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poa.the_POAManager().activate(); |
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|
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logger.write(toString, Logger.SYSINIT, "started"); |
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|
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// now we are running, we just need to serve |
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// so we ask the orb to block for us until it has finished |
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orb.run(); |
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|
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} catch (Exception e) { |
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System.err.println("FILTER ERROR: " + e); |
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e.printStackTrace(System.out); |
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} |
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} |
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|
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/** |
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* A simple method to print the usage of this class. |
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* It never returns, but instead exits to the system |
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* with a value 1, to indicate the system did not start |
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* properly. |
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*/ |
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public static void usage() { |
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System.out.println("USAGE: java FilterMain <name>"); |
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System.out.println("WHERE <name>:"); |
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System.out.println(" The unique identifier for the Filter in the system."); |
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System.exit(1); |
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} |
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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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//---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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//---STATIC ATTRIBUTES--- |
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|
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} |
