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Hernan - AWT uses preferences to get preferred input
method.

What you must do, is to use

java -Djava.util.prefs.PreferencesFactory=yourfactory

Then everything should be OK.

Konstantin Kladko
Tools/Libraries group, Sun Microsystems

Hernan Silberman <hsilberm@pdi.com> wrote in message news:<3CF7CA1C.3010803@pdi.com>...
> Hi there.
> 
> I've written a custom Preferences implementation for my Java 1.4 
> application which uses a relation database as a backing store.  During 
> the app's startup, I make this known to the app by setting the 
> appropriate sysyem property:
> 
> System.getProperties().
> setProperty("java.util.prefs.PreferencesFactory",
> "com.dw.util.prefs.MyPreferencesFactory");
> 
> I noticed that if my app attempted to bring up any UI before this system 
> property is set, the default (linux or windows) preferences 
> implementation would beat mine to the punch.  My system preference gets 
> set, but it's too late, another preferences implementation has beat mine 
> to the punch because some other entity requested a preference node.
> 
> The real problem is that I need to identify and authenticate my user 
> before I can build the "user root" Preferences node.  To do this, I 
> bring up a login dialog.  For some reason, bringing up the dialog 
> results in a call PreferencesFactory.userRoot().  I don't understand 
> this--why would AWT want to have anything with java.util.prefs?
> 
> This stack trace tells the story.  I'm simply trying to show a splash 
> screen and sun.awt.im.ExecutableInputMethodManager makes a getUserRoot() 
> call before I'm ready for it:
> 
> at java.util.prefs.Preferences.userRoot(Preferences.java:341)
> at 
> sun.awt.im.ExecutableInputMethodManager$2.run(InputMethodManager.java:785)
> at java.security.AccessController.doPrivileged(Native Method)
> at 
> sun.awt.im.ExecutableInputMethodManager.getUserRoot(InputMethodManager.java:783)
> at 
> sun.awt.im.ExecutableInputMethodManager.<init>(InputMethodManager.java:274)
> at sun.awt.im.InputMethodManager.getInstance(InputMethodManager.java:138)
> at sun.awt.windows.WFramePeer.<init>(WFramePeer.java:148)
> at sun.awt.windows.WToolkit.createFrame(WToolkit.java:331)
> at java.awt.Frame.addNotify(Frame.java:469)
> at java.awt.Window.addNotify(Window.java:390)
> at java.awt.Window.show(Window.java:433)
> at java.awt.Component.show(Component.java:1128)
> at java.awt.Component.setVisible(Component.java:1083)
> at com.dw.nile.app.ui.SplashWindow.<init>(SplashWindow.java:90)
> at com.dw.nile.app.ui.SplashWindow.<init>(SplashWindow.java:26)
> at com.dw.nile.app.NileClientApp.appInit(NileClientApp.java:78)
> 
> 
> Any insight is much appreciated.
> 
> thanks...
> hernan