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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.core; |
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//---IMPORTS--- |
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import core.*; |
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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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import java.util.*; |
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import java.io.*; |
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/** |
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* The main class for the CORE of the I-Scream system. |
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*/ |
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public static final String REVISION = "$Revision$"; |
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/** |
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* The toString() of this class |
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* As it won't be instatiated, this is needed. |
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*/ |
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public static final String toString = "CORE(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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/** |
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* The default location of the properties file for the system |
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*/ |
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public static final String DEFAULTPROPERTIES = "default.properties"; |
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//---STATIC METHODS--- |
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/** |
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* @param args the command line arguments |
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*/ |
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public static void main(String[] args) { |
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System.out.println("I-Scream CORE:" + REVISION + " - coming up."); |
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System.out.println("--- I-Scream ---"); |
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// get the command line args |
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String defaultProperties = DEFAULTPROPERTIES; |
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if (args.length > 0) { |
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if (args[0].equals("-l")) { |
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defaultProperties = args[1]; |
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} else if (args[0].equals("-h")) { |
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usage(); |
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} else { |
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usage(); |
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} |
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} |
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// load the default properties file into the system properties |
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System.out.println(toString + ": initialising - using " + defaultProperties); |
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try { |
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Properties initProperties = new Properties(System.getProperties()); |
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initProperties.load(new FileInputStream(new File(defaultProperties))); |
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System.setProperties(initProperties); |
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} catch (Exception e) { |
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System.err.println(toString + ": ERROR " + e.getMessage()); |
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usage(); |
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} |
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// continue to bring the system up |
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System.out.println(toString + ": coming up"); |
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try { |
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// start the ORB |
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ORB orb = ORB.init(args, null); |
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objRef = orb.resolve_initial_references("NameService"); |
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NamingContextExt ncRef = NamingContextExtHelper.narrow(objRef); |
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// get a ref to our servers |
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// first the Configurator |
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ConfiguratorServant configuratorRef = new ConfiguratorServant(poa); |
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// check we got it |
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if (ncRef == null) { |
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throw new Exception("Unable to locate CORBA Naming Service for configured ORB!"); |
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} |
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// then the logger |
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// **** PUT THE LOGGER HERE TIM **** |
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// start and bind each server in turn |
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// advertise them to the naming context |
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// Configurator |
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objRef = poa.servant_to_reference(configuratorRef); |
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ncRef.bind(ncRef.to_name("iscream.Configurator"), objRef); |
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// work out which logger to use |
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String whichLogger = System.getProperty("uk.ac.ukc.iscream.LoggerClass"); |
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String loggerPackage = System.getProperty("uk.ac.ukc.iscream.LoggerPackage"); |
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// construct the relevant LoggerImpl |
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LoggerImpl loggerImplRef = (LoggerImpl) ClassLoader.getSystemClassLoader().loadClass(loggerPackage + "." + whichLogger).newInstance(); |
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// Logger |
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// **** REGISTER THE LOGGER WITH THE NAME SERVICE TIM **** |
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// setup and bind the LoggerServant |
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LoggerServant loggerRef = new LoggerServant(loggerImplRef); |
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objRef = poa.servant_to_reference(loggerRef); |
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ncRef.bind(ncRef.to_name("iscream.Logger"), objRef); |
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// start the POA off |
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poa.the_POAManager().activate(); |
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// get a reference to the servant as a Logger |
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Logger logRef = LoggerHelper.narrow(objRef); |
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// create the Configurator |
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ConfigurationManagerServant configManRef = new ConfigurationManagerServant(poa, logRef); |
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// and advertise it to the naming context |
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objRef = poa.servant_to_reference(configManRef); |
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ncRef.bind(ncRef.to_name("iscream.ConfigurationManager"), objRef); |
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System.out.println("I-Scream CORE:" + REVISION + " - started."); |
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// start the POA off |
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poa.the_POAManager().activate(); |
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logRef.write(toString, Logger.SYSINIT, "started"); |
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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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// there is already another CORE of the same name registered |
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if ( e instanceof org.omg.CosNaming.NamingContextPackage.AlreadyBound) { |
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System.err.println("ERROR: Another I-Scream CORE is already registered under the same name."); |
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System.err.println("CORE ERROR: Another I-Scream CORE is already registered under the same name."); |
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// otherwise we don't know what happened |
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// so print the error and do a stack trace |
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// so print the error and do a stack trace if debug is enabled |
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} else { |
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System.err.println("CORE ERROR: " + e); |
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e.printStackTrace(System.out); |
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System.err.println("CORE ERROR: " + e.getMessage()); |
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if (Integer.parseInt(System.getProperty("uk.ac.ukc.iscream.Verbosity")) == Logger.DEBUG) { |
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System.err.println("*** DEBUG ENABLED - printing stack trace ***"); |
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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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/** |
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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 Core <option>"); |
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System.out.println("WHERE <option>:"); |
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System.out.println(" -l <filename> - the location of initial system properties"); |
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System.out.println(" -h - this help screen"); |
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System.exit(1); |
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} |
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//---CONSTRUCTORS--- |
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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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//---STATIC ATTRIBUTES--- |
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} |
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} |
