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//---PACKAGE DECLARATION--- |
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package uk.org.iscream.filtermanager; |
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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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import uk.org.iscream.util.*; |
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import uk.org.iscream.core.*; |
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import uk.org.iscream.componentmanager.*; |
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/** |
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* A FilterManager |
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* The FilterManager handles initialisation |
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* of hosts with the system, allowing hosts to |
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* gain their configuration and a hook to a Filter |
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* to talk to. |
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* |
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* @author $Author$ |
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* @version $Id$ |
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*/ |
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class FilterManager { |
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public class FilterManager implements Component { |
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//---FINAL ATTRIBUTES--- |
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*/ |
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public static final String REVISION = "$Revision$"; |
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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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*/ |
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public static final String NAME = "FilterManager"; |
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//---STATIC METHODS--- |
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public static void main(String[] args) { |
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//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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/** |
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* This method starts the FilterManager |
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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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_logger = _refman.getLogger(); |
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// can't have a real toString() :) |
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String toString = "FilterManager(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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try { |
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ORB orb = ORB.init(args, null); |
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// something to hold objects |
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org.omg.CORBA.Object objRef = null; |
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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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// 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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// get a ref to the Configurator & the Logger |
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objRef = ncRef.resolve(ncRef.to_name("iscream.Configurator")); |
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Configurator configurator = ConfiguratorHelper.narrow(objRef); |
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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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logger.write(toString, "coming up"); |
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// create the filterManagerRef to our servant |
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//filterManagerRef = new FilterManagerServant; |
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// register the servant with the name service |
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//objRef = poa.servant_to_reference(filterManagerRef); |
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//ncRef.bind(ncRef.to_name("iscream.FilterManager"), objRef); |
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// start the POA off |
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poa.the_POAManager().activate(); |
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// get the config |
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Configuration myConfig = configurator.getConfiguration("filterManager"); |
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// some place holders for the configuration |
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int port = 0; |
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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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// get the property |
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try { |
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port = new Integer(myConfig.getProperty("listenPort")).intValue(); |
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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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logger.write(toString, "configured"); |
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logger.write(toString, "starting listener"); |
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FilterManagerListener fml = new FilterManagerListener(logger, configurator, port); |
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fml.start(); |
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logger.write(toString, "started"); |
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} catch (Exception e) { |
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System.err.println("FILTER MANAGER ERROR: " + e); |
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e.printStackTrace(System.out); |
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// startup a thread to listen for hosts |
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HostListener hostListener = new HostListener(); |
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hostListener.start(); |
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_logger.write(toString(), Logger.SYSINIT, "started"); |
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} |
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/** |
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* Does a dependency check. Used mainly at startup to |
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* see if the required dependencies (components) are up |
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* and running. |
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* |
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* @return a boolean value, true if the depdencies are satisfied |
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*/ |
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public boolean depCheck() { |
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// This also depends on Filters.. but only when requested. |
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// I believe the code is in place to handle that elsewhere. |
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try { |
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org.omg.CORBA.Object obj; |
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obj = _refman.getCORBARef("iscream.Logger"); |
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obj = _refman.getCORBARef("iscream.ConfigurationManager"); |
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} catch(ComponentCORBAException e) { |
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System.err.println(toString() + ": Dependency Failure: "+e); |
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return false; |
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} |
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// dependency check suceeded |
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return true; |
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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.org.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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– |
//---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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//---ACCESSOR/MUTATOR METHODS--- |
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//---ATTRIBUTES--- |
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/** |
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* This is the friendly identifier of the |
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* component this class is running in. |
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* eg, a Filter may be called "filter1", |
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* If this class does not have an owning |
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* component, a name from the configuration |
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* can be placed here. This name could also |
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* be changed to null for utility classes. |
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*/ |
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private String _name = FilterManager.NAME; |
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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; |
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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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//---STATIC ATTRIBUTES--- |
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