[ULC-developer] ULCMemory Leak - Support Request

[Les Thomas]

Hi, 

 

Please feel free to treat this as support request. 


We believe we are experiencing a fairly significant memory lead using a
ULCDialog (with a client-side extension). Our application is fairly complex,
and before we start to diagnose the problem, I would like to confirm that
bug UBA 1053- "Memory leak for ULCDialogs that have an owner (i.e. a parent
window)" has in fact been fixed.    When I run a simple test, I notice that
there still appears to be a leak.  


The dialog used in the test uses ULCDialog.DISPOSE_ON_CLOSE and has a
ULCFrame as its owner.  This is similar to our application.  When I run the
sample program below, which I used from a similar email :
http://lists.canoo.com/mailman/private/ulc-developer/2005/002598.html, the
application doesn't appear to release all memory.  For example:


 


Before:  Total - 4232KB   Used - 3981.03


After 50 dialog objects created - Total - 5776KB  Used - 4303KB


After 50 dialog objects disposed - - 5776KB  Used - 5731KB


 


 


Any tips or hints would be appreciated.  


Kind regards, 


Les


 


 


Sample program:


 


import com.ulcjava.base.application.AbstractApplication;


import com.ulcjava.base.application.*;


import com.ulcjava.base.application.event.IActionListener;


import com.ulcjava.base.development.DevelopmentRunner;


import com.ulcjava.base.application.event.ActionEvent;


 


public class Example extends AbstractApplication {


 


  public void start() {


    final ULCFrame mainFrame = new ULCFrame("MemoryTestApplication");


    mainFrame.setSize(600, 400);


    mainFrame.setDefaultCloseOperation(com.ulcjava.base.application.


                                       ULCFrame.TERMINATE_ON_CLOSE);


 


    ULCBoxPane layoutPane = new ULCBoxPane();


    mainFrame.add(layoutPane);


    ULCButton button = new ULCButton("open dialog");


    


    layoutPane.add(button);


    button.addActionListener(new IActionListener() {


      public void actionPerformed(ActionEvent event) {


        System.out.println(">>>>> Dialog free memory: " +


                           Runtime.getRuntime().freeMemory() + " / max " +


                           Runtime.getRuntime().maxMemory());


        ULCDialog dialog = new ULCDialog(mainFrame, "Test", false);


        dialog.setDefaultCloseOperation(ULCDialog.DISPOSE_ON_CLOSE);


        dialog.add(new ULCTree());


        dialog.setVisible(true);


      };


    });


    


    ULCButton memoryButton = new ULCButton("Display Memory");


    memoryButton.addActionListener(new IActionListener() {


      public void actionPerformed(ActionEvent event) {


        System.out.println(">>>>> Memory - free memory: " +


                           Runtime.getRuntime().freeMemory() + " / max " +


                           Runtime.getRuntime().maxMemory());


      };


    });


    


    layoutPane.add(memoryButton);


 


 


    mainFrame.setVisible(true);


  }


 


  public static void main(String[] args) {


    DevelopmentRunner.setApplicationClass(Example.class);


    DevelopmentRunner.main(args);


  }


 


}