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ajm |
1.27 |
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tdb |
1.1 |
//---PACKAGE DECLARATION--- |
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tdb |
1.32 |
package uk.org.iscream.rootfilter; |
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1.1 |
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//---IMPORTS--- |
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1.32 |
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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import uk.org.iscream.clientinterface.*; |
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1.1 |
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/** |
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1.10 |
* The root filter is what all filters talk to |
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* Hosts cannot talk to this implementation of a filter. |
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* It provides hooks to all data interfaces for the system |
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* namely the client interface and the db interface. |
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* This is an i-scream component that starts the |
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* RootFilter services. |
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1.1 |
* |
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1.29 |
* @author $Author: tdb1 $ |
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1.35 |
* @version $Id: RootFilter.java,v 1.34 2001/03/16 15:22:13 tdb1 Exp $ |
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tdb |
1.1 |
*/ |
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1.17 |
public class RootFilter implements Component { |
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1.1 |
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//---FINAL ATTRIBUTES--- |
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/** |
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* The current CVS revision of this class |
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*/ |
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1.35 |
public static final String REVISION = "$Revision: 1.34 $"; |
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1.10 |
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1.1 |
//---STATIC METHODS--- |
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ajm |
1.10 |
//---CONSTRUCTORS--- |
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//---PUBLIC METHODS--- |
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1.5 |
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1.10 |
/** |
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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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1.26 |
// get references to key objects |
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1.30 |
_logger = _refman.getLogger(); |
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1.26 |
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1.10 |
_logger.write(toString(), Logger.SYSINIT, "coming up"); |
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tdb |
1.28 |
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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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tdb |
1.23 |
} |
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tdb |
1.28 |
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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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try { |
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realInterface = cp.getProperty(configName, "RootFilter.realtimeInterfaceName"); |
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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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realInterface = null; |
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dbInterface = null; |
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1.1 |
} |
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1.23 |
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1.13 |
ClientInterface ciReal = null, ciDB = null; |
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1.8 |
// get reference to the client interfaces - the real time one |
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1.11 |
if (realInterface != null) { |
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1.13 |
ciReal = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + realInterface)); |
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1.11 |
} |
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1.10 |
// get reference to the client interfaces - and the db one |
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1.11 |
if (dbInterface != null) { |
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1.13 |
ciDB = ClientInterfaceHelper.narrow(_refman.getCORBARef("iscream.ClientInterface." + dbInterface)); |
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ajm |
1.11 |
} |
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tdb |
1.33 |
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1.28 |
// setup a queue |
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1.33 |
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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tdb |
1.34 |
_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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1.33 |
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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tdb |
1.15 |
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tdb |
1.28 |
// 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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tdb |
1.15 |
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ajm |
1.11 |
if (realInterface == null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + dbInterface); |
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tdb |
1.15 |
CIWrapper c = new CIWrapper(ciDB, queue); |
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c.start(); |
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ajm |
1.11 |
} else if (dbInterface == null) { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface); |
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tdb |
1.15 |
CIWrapper c = new CIWrapper(ciReal, queue); |
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c.start(); |
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ajm |
1.11 |
} else { |
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_logger.write(toString(), Logger.DEBUG, "hooked to interfaces - " + realInterface + " & " + dbInterface); |
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tdb |
1.15 |
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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ajm |
1.11 |
} |
131 |
tdb |
1.15 |
|
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ajm |
1.8 |
// RootFilterServant start (for inbound child filter data) |
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ajm |
1.10 |
_logger.write(toString(), Logger.DEBUG, "starting Root Filter"); |
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tdb |
1.15 |
RootFilterServant filterServant = new RootFilterServant(queue); |
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ajm |
1.8 |
// bind to the naming service as a filter |
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ajm |
1.14 |
_refman.bindToOrb(filterServant, "iscream.Filter." + RootFilter.NAME); |
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tdb |
1.1 |
|
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ajm |
1.10 |
_logger.write(toString(), Logger.SYSINIT, "started"); |
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tdb |
1.18 |
|
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tdb |
1.29 |
} |
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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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tdb |
1.35 |
org.omg.CORBA.Object obj; |
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// first we need to check the Configuration system is available |
153 |
tdb |
1.29 |
try { |
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// first check the ConfigurationManager is alive |
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obj = _refman.getCORBARef("iscream.ConfigurationManager"); |
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tdb |
1.35 |
} 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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tdb |
1.29 |
String cli = cp.getProperty("RootFilter", "RootFilter.realtimeInterfaceName"); |
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tdb |
1.35 |
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 |
177 |
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try { |
178 |
tdb |
1.29 |
String dbi = cp.getProperty("RootFilter", "RootFilter.dbInterfaceName"); |
179 |
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obj = _refman.getCORBARef("iscream.ClientInterface." + dbi); |
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} catch(ComponentCORBAException e) { |
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tdb |
1.31 |
System.err.println(toString() + ": Dependency Failure: "+e); |
182 |
tdb |
1.29 |
return false; |
183 |
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} catch(PropertyNotFoundException e) { |
184 |
tdb |
1.35 |
System.err.println(toString() + ": Database interface not configured and thus not enabled."); |
185 |
tdb |
1.29 |
} |
186 |
tdb |
1.35 |
|
187 |
tdb |
1.29 |
// dependency check suceeded |
188 |
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return true; |
189 |
tdb |
1.1 |
} |
190 |
ajm |
1.10 |
|
191 |
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/** |
192 |
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* Overrides the {@link java.lang.Object#toString() Object.toString()} |
193 |
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* method to provide clean logging (every class should have this). |
194 |
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* |
195 |
tdb |
1.32 |
* This uses the uk.org.iscream.util.NameFormat class |
196 |
ajm |
1.10 |
* to format the toString() |
197 |
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* |
198 |
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* @return the name of this class and its CVS revision |
199 |
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*/ |
200 |
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public String toString() { |
201 |
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return FormatName.getName( |
202 |
ajm |
1.14 |
NAME, |
203 |
ajm |
1.10 |
getClass().getName(), |
204 |
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REVISION); |
205 |
tdb |
1.1 |
} |
206 |
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207 |
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//---PRIVATE METHODS--- |
208 |
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209 |
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//---ACCESSOR/MUTATOR METHODS--- |
210 |
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211 |
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//---ATTRIBUTES--- |
212 |
ajm |
1.10 |
|
213 |
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/** |
214 |
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* This holds a reference to the |
215 |
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* system logger that is being used. |
216 |
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*/ |
217 |
ajm |
1.26 |
private Logger _logger; |
218 |
ajm |
1.10 |
|
219 |
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/** |
220 |
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* A reference to the reference manager in use |
221 |
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*/ |
222 |
tdb |
1.30 |
private ReferenceManager _refman = ReferenceManager.getInstance(); |
223 |
ajm |
1.10 |
|
224 |
tdb |
1.1 |
//---STATIC ATTRIBUTES--- |
225 |
ajm |
1.10 |
|
226 |
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/** |
227 |
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* The friendly name for this component, used by |
228 |
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* all related classes. |
229 |
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* This is set from the configuration. |
230 |
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*/ |
231 |
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public static String NAME; |
232 |
tdb |
1.1 |
|
233 |
ajm |
1.5 |
} |