Have you considered using the Preferences API rather than Properties files?
I've been working with them for a while and they seem pretty good to me.
Mind you, I haven't been using hundreds of preferences, just a dozen (give
or take), so I can't tell you if the performance is better, worse, or the
same as using properties.
Rhino
----- Original Message -----
From: "news.basebeans.net" <[EMAIL PROTECTED]>
To: <[EMAIL PROTECTED]>
Sent: Friday, January 02, 2004 11:49 AM
Subject: Re: Properties Utility or Solution?
> > ResourceBundle resources =
> > ResourceBundle.getBundle("path.to.your.properties.file");
> >
> > do you need it to be???
> >
> > Now I would be curious to see if anyone can come up with a way to reload
> > a properties file without having to shutdown my appserver for example or
> > having to reload a context.
>
> Only because I hate condescension am I posting this. Loading the bundle
> is not the problem... it's dealing with hundreds of lines of properties
> and non-specific data types that is annoying. With the posted code, you
> can synch on the entire class if you're worried about multi-threads.
>
> The problem comes with the actual parsing of the data, and the get
> methods involved. I was hoping for a much simpler XML format that
> knowingly parses data types, stores them as static data, and creates get
> methods for fast execution.
>
> Perhaps I'm going to have to write a new loader and XDoclet creator.
>
>
>
> public class MyProperties extends Thread
> {
>
> private static final String SLEEP_TIME = "properties.sleep";
> private static final long DEFAULT_TIME = 1200000;
>
> /** singleton self-reference */
> private static MyProperties mMyProperties = null;
> /** Holds all properties */
> private static Properties mProperties = new Properties();
>
> /** Flag to keep this thread running. When set to false, the thread
> will stop. */
> private static boolean mRunning = true;
>
> /** time the properties file was last modified */
> private long mLastModified = 0;
>
> /**
> * <p>Retrieves each of the properties. Assumes the Properties file
> has been loaded.</p>
> */
> private void readProperties()
> {
> // Read your props here.
> } // private void readProperties()
>
> /**
> * The private constructor
> */
> private MyProperties()
> {
> } // private MyProperties()
>
> /**
> * Returns the instance of the MyProperties
> *
> * @return MyProperties
> */
> public static MyProperties getInstance()
> {
> if (mMyProperties == null)
> {
> mMyProperties = new MyProperties();
> }
> return mMyProperties;
> } // public static MyProperties getInstance()
>
> /**
> * This method runs forever and checks if the properties file
> * has been changed. If it has it will call the reload() method.
> *
> * @return void
> */
> public void run()
> {
> try
> {
> if (this.mPath == null)
> {
> throw new Exception("You must call init before starting the
> MyProperties thread.");
> }
> while (mRunning)
> {
> if (this.hasFileChanged())
> {
> this.load();
> }
> try
> {
> sleep(this.mSleepTime);
> }
> catch (InterruptedException e)
> {
> // This is fine... we want to shutdown now.
> mRunning = false ;
> }
> } // end while running
> }
> catch (Exception e)
> {
> mLogger.error("Exception in MyProperties.run()", e);
> }
> mLogger.error("MyProperties.run() - exiting...");
> } // public void run()
>
> /**
> * This is an initialization method that is used to set two member
> * variables and to initially load the properties file
> *
> * @param ServletContext pServletContext
> * @param String pPath
> * @return void
> */
> public void init(ServletContext pServletContext, String pPath)
> {
> this.mServletContext = pServletContext;
> this.mPath = pPath;
> this.load();
> } // public void init(ServletContext pServletContext, String pPath)
>
> /**
> * <p>Removes the singleton from memory. Useful for shutting down
> the system.</p>
> */
> public void shutdown()
> {
> mLogger.info("shutdown");
> mRunning = false;
> // kick it out of sleep mode in loop
> this.interrupt();
> mMyProperties = null;
> } // public void shutdown()
>
> /**
> * <p>Loads the properties file as specified in mPath.</p>
> */
> private void load()
> {
> mLogger.info("load() - START");
> InputStream lInStream =
> this.mServletContext.getResourceAsStream(this.mPath);
>
> try
> {
> mProperties.load(lInStream);
> }
> catch (IOException e)
> {
> mLogger.error("load() - Error while loading resource.", e);
> }
> finally
> {
> if (lInStream != null)
> {
> try
> {
> lInStream.close();
> }
> catch (IOException e)
> {
> mLogger.error("load() - Error while trying to close the
> InputStream.", e);
> }
> }
> }
> // Load the properties
> this.readProperties();
> this.setSleepTime();
> } // private void load()
>
> /**
> * Sets the SleepTime from the property "properties.sleep".
> *
> * @return void
> */
> private void setSleepTime()
> {
> try
> {
> this.mSleepTime =
> Long.parseLong(mProperties.getProperty(SLEEP_TIME));
> }
> catch (Exception e)
> {
> this.mSleepTime = DEFAULT_TIME;
>
> mLogger.warn("Make sure the property:" + SLEEP_TIME + " is set
> in the " + this.mPath + " file.", e);
> mLogger.warn("Defaulting SleepTime to " + DEFAULT_TIME + "
> millseconds");
> }
> } // private void setSleepTime()
>
> /**
> * Checks the files last modified date and compares it to date
> * that was previously stored. Returns "true" if the file
> <b>has</b> changed.
> *
> * @return boolean
> */
> private boolean hasFileChanged()
> {
> //mLogger.info("hasFileChanged() - START");
>
> String lRealPath = this.mServletContext.getRealPath(this.mPath);
> File lFile = new File(lRealPath);
> long lCurrentLastMod = lFile.lastModified();
> boolean lBool = false;
>
> if (this.mLastModified == 0)
> {
> // First time in need to set the Last Modified member variable
>
> this.mLastModified = lCurrentLastMod;
> lBool = false;
> }
> else if (this.mLastModified == lCurrentLastMod)
> {
> // The File has NOT changed
> lBool = false;
> }
> else
> {
> // The File has changed
> this.mLastModified = lCurrentLastMod;
> lBool = true;
> }
>
> return lBool;
> } // private boolean hasFileChanged()
>
>
> } // public class MyProperties extends Properties implements Runnable
>
>
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