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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 uk.ac.ukc.iscream.core.*; |
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import java.util.*; |
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import java.io.*; |
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import uk.ac.ukc.iscream.util.*; |
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import java.util.Properties; |
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import java.util.Date; |
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import java.text.DateFormat; |
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/** |
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* An implementation of the Configuration IDL |
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* set their configuration from a central location. |
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* |
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* When classes want their configuration, they contact |
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* the Configurator, which will locate their config, |
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* the ConfigurationManager, which will locate their config, |
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* open it and pass it to a Configuration object which is |
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* then passed back to the calling class. |
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* |
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/** |
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* Creates a new ConfigurationServant taking a hook |
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* to a file containing the configuration. |
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* to a Properties object containing the configuration. |
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* |
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* @param propertiesStream an InputStream connected to the configuration |
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* @param properties a Properties object that contains the full properties for this configuration |
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* @param fileList the list of config files used to build this configuration |
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* @param lastModified the most recent last modified value for the file list |
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* @param logRef a reference to the logger system |
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*/ |
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ConfigurationServant(File configurationFile, Logger logRef) { |
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_lastModified = configurationFile.lastModified(); |
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_logRef = logRef; |
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_logRef.write(this.toString(), "created - last modified:" + getLastModified()); |
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try { |
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InputStream configurationStream = new FileInputStream(configurationFile); |
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_properties.load(configurationStream); |
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} catch (Exception e) { |
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// **************************************** |
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// either IOException from the .load() or |
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// a SecurityException or FileNotFoundException from |
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// the inputStream, not sure what to do yet!!! |
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} |
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ConfigurationServant(Properties properties, String fileList, long lastModified) { |
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// assign local variables |
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_properties = properties; |
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_lastModified = lastModified; |
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_fileList = fileList; |
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_logger.write(toString(), Logger.SYSINIT, "created"); |
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String date = DateFormat.getDateTimeInstance(DateFormat.SHORT, DateFormat.MEDIUM).format(new Date(getLastModified())); |
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_logger.write(toString(), Logger.SYSMSG, "last modified - " + date); |
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_logger.write(toString(), Logger.DEBUG, "file list - " + _fileList); |
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} |
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//---PUBLIC METHODS--- |
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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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* 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.FormatName 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 this.getClass().getName() + ":" + REVISION; |
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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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//---PRIVATE METHODS--- |
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/** |
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* Overridden for debugging purposes |
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* to see when an instance of this class |
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* is destroyed |
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*/ |
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protected void finalize() throws Throwable { |
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_logger.write(this.toString(), Logger.DEBUG, "finalized"); |
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} |
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//---ACCESSOR/MUTATOR METHODS--- |
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/** |
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return _lastModified; |
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} |
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/** |
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* Returns the list of files used to build the Properties |
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* this object is using. |
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* |
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* @return the list of files |
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*/ |
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public String getFileList() { |
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return _fileList; |
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} |
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//---ATTRIBUTES--- |
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/** |
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private Properties _properties = new Properties(); |
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/** |
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* Reference to a Logger |
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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 _logRef; |
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private Logger _logger = ReferenceManager.getInstance().getLogger(); |
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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 = Core.NAME; |
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/** |
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* The date stamp of the configuration file |
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* this object is using |
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*/ |
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private long _lastModified; |
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/** |
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* The list of files that were used to build this configuration |
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*/ |
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private String _fileList; |
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//---STATIC ATTRIBUTES--- |
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