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//---PACKAGE DECLARATION--- |
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package uk.ac.ukc.iscream.rootfilter; |
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package uk.org.iscream.cms.server.rootfilter; |
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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.clientinterface.*; |
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import uk.org.iscream.cms.server.util.*; |
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import uk.org.iscream.cms.server.core.*; |
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import uk.org.iscream.cms.server.componentmanager.*; |
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import uk.org.iscream.cms.server.clientinterface.*; |
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/** |
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* The root filter is what all filters talk to |
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* This starts the Root Filter for the system |
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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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_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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// configuration variables we require |
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String ourName = null; |
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String realInterface = null; |
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String dbInterface = null; |
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Configuration config = _refman.getCM().getConfiguration("RootFilter"); |
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if (config == null) { |
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throw new ComponentStartException("Unable to obtain configuration for component"); |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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String configName = "RootFilter"; |
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// set the name of the root filter |
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try { |
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NAME = cp.getProperty(configName, "RootFilter.name"); |
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} catch (PropertyNotFoundException e) { |
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NAME = null; |
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_logger.write(toString(), Logger.WARNING, "RootFilter name not set: "+e); |
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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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ourName = config.getProperty("RootFilter.name"); |
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realInterface = config.getProperty("RootFilter.realtimeInterfaceName"); |
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dbInterface = config.getProperty("RootFilter.dbInterfaceName"); |
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} catch (org.omg.CORBA.MARSHAL e) { |
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throw new ComponentStartException("Unable to obtain requried configuration property for component"); |
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} |
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// try and get the names of the ciReal and ciDB |
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String realInterface, dbInterface; |
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// first realtime |
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try { |
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realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName"); |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e); |
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realInterface = null; |
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} |
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// next dbi |
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try { |
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dbInterface = cp.getProperty(configName, "RootFilter.dbInterfaceName"); |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e); |
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dbInterface = null; |
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} |
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// now we have the name of the Root Filter we set it |
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NAME = ourName; |
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_logger.write(toString(), Logger.SYSINIT, "configured"); |
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ClientInterface ciReal = null, ciDB = null; |
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// get reference to the client interfaces - the real time one |
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if (realInterface != null) { |
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ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface)); |
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} |
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Queue queue = new Queue(); |
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// setup a queue |
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Queue queue; |
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// see if this Queue needs a size limit |
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try { |
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int queueSizeLimit = Integer.parseInt(cp.getProperty(configName, "Queue.SizeLimit")); |
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String queueRemoveAlgorithm = cp.getProperty(configName, "Queue.RemoveAlgorithm"); |
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int algorithm = StringUtils.getStringPos(queueRemoveAlgorithm, Queue.algorithms); |
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if(algorithm != -1) { |
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_logger.write(toString(), Logger.DEBUG, "Starting Queue with size limit of "+queueSizeLimit+", using remove algorithm "+queueRemoveAlgorithm); |
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// we have valid values, so lets start it. |
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queue = new Queue(queueSizeLimit, algorithm); |
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} |
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else { |
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_logger.write(toString(), Logger.WARNING, "Bad Queue Algorithm configuration, not known: "+queueRemoveAlgorithm); |
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// just don't activate a limit |
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queue = new Queue(); |
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} |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.DEBUG, "Optional config not set: "+e); |
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// just don't activate a limit |
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queue = new Queue(); |
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} catch (NumberFormatException e) { |
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_logger.write(toString(), Logger.WARNING, "Bad Queue SizeLimit configuration: "+e); |
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// just don't activate a limit |
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queue = new Queue(); |
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} |
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if (realInterface == null) { |
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// startup a monitor on this queue |
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try { |
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// try to get the interval, if this fails, we won't start up the monitor |
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int queueMonitorInterval = Integer.parseInt(cp.getProperty(configName, "Queue.MonitorInterval")); |
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String queueName = NAME + " RootFilter"; |
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queue.startMonitor(queueMonitorInterval*1000, queueName); |
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} catch (PropertyNotFoundException e) { |
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_logger.write(toString(), Logger.WARNING, "failed to find queue monitor config, disabling. " + e); |
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} |
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if (realInterface != null && dbInterface != null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface); |
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CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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c = new CIWrapper(ciDB, queue); |
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c.start(); |
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} else if (realInterface == null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface); |
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CIWrapper c = new CIWrapper(ciDB, queue); |
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c.start(); |
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CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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} else { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface); |
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CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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c = new CIWrapper(ciDB, queue); |
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c.start(); |
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_logger.write(toString(), Logger.WARNING, "not hooked to any client interfaces, this is probably not intentional!"); |
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} |
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// RootFilterServant start (for inbound child filter data) |
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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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org.omg.CORBA.Object obj; |
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// first we need to check the Configuration system is available |
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try { |
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// first check the ConfigurationManager is alive |
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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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// next we need to check which client interfaces *should* |
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// be active, and check them. Note they do not have to |
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// be enabled, and we should check this. |
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// -- each check only forces a dependency if it's configured |
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ConfigurationProxy cp = ConfigurationProxy.getInstance(); |
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// first check the client interface |
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try { |
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String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName"); |
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obj = _refman.getCORBARef("iscream.ClientInterface." + cli); |
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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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} catch(PropertyNotFoundException e) { |
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System.err.println(toString() + ": Client interface not configured and thus not enabled."); |
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} |
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// second check the database interface |
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try { |
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String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName"); |
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obj = _refman.getCORBARef("iscream.ClientInterface." + dbi); |
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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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} catch(PropertyNotFoundException e) { |
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System.err.println(toString() + ": Database interface not configured and thus not enabled."); |
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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.ac.ukc.iscream.util.NameFormat class |
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* This uses the uk.org.iscream.cms.server.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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* 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 |