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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.filtermanager; |
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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.util.*; |
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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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* The FilterManager handles assignment of Filters to hosts. |
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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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// *************************************** |
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// VERY TEMPORARY - will find a better way |
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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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// can't have a real toString() :) |
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String toString = "FilterManager(" + REVISION.substring(11, REVISION.length() - 2) + ")"; |
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ReferenceManager refman = ReferenceManager.init(null, null); |
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refman.getLogger().write(toString, Logger.SYSINIT, "coming up"); |
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// configuration variable we require |
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int listenPort = 0; |
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//---CONSTRUCTORS--- |
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Configuration config = refman.getCM().getConfiguration("FilterManager"); |
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if (config == null) { |
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throw new RuntimeException ("CRITICAL:Unable to obtain configuration" + |
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" Advise you check the i-scream log for more information."); |
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} else { |
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try { |
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listenPort = Integer.parseInt(config.getProperty("FilterManager.listenPort")); |
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} catch (org.omg.CORBA.MARSHAL e) { |
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refman.getLogger().write(toString, Logger.FATAL, "required config property not present"); |
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throw new RuntimeException ("CRITICAL:Unable to obtain required configuration property" + |
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" Advise you check the i-scream log for more information."); |
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//---PUBLIC METHODS--- |
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} |
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} |
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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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refman.getLogger().write(toString, Logger.SYSINIT, "configured"); |
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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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refman.getLogger().write(toString, Logger.SYSINIT, "starting listener"); |
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HostListener hostListener = new HostListener(listenPort); |
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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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refman.getLogger().write(toString, Logger.SYSINIT, "listener started"); |
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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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