Dispose objects during window closing

I use vb to call java application through batch file (.bat) to connect to another java app to send message. Since the java application is executing in command prompt window, if the window accidentally closed, is it possible to close the connection, terminate loop, dispose objects properly during window closing? most importantly, the program at the other side knows the the connection is closed and message stop sending by the java app? Any suggestion?
Thanks.

Does your app have a fixed main window from where you launch other windows? If so, don't call System.exit(0) in windowClosing event for any of those windows except the main window and it would solve your problem.
Otherwise you would need to somehow keep track of all the open windows in your application and in the windowClosing method you would check to see how many windows are open currently. If the window being closed is the only window open at that time, call System.exit(0). Else don't call it.
Hope this helps.

Similar Messages

Cannot access a disposed object that was just created.

Here is my code:
Imports System.Data.SqlClient
Imports System.Diagnostics
Imports System.IO
Imports System.Threading
Imports System.Text
Imports System.Windows.Forms
Module MigrationControl
Dim FormBulkLoadFailed As MessagePlatform
If runCommand(comSQL, cmdLoad, True) = -99 Then
'Informing user the Bulk Load failed.
FormBulkLoadFailed = New MessagePlatform(11)
FormBulkLoadFailed.ShowDialog()
End
End If
The FormBulkLoadFailed.ShowDialog() does nothing and the runtime properties says:
Cannot access a disposed object.
Object name: 'MessagePlatform'
How can something that was just created already be disposed?
Thank you,
Charlie

Does the MessagePlayform accept constructor accept an integer parameter? You are passing an 11 to the form. You probably have two constructors in the form. The default with zero parameters and the one you are using with one parameter.
I suspect the constructor is closing the form before it is displayed. Test for nothing like in the changes below
Dim FormBulkLoadFailed As MessagePlatform
If runCommand(comSQL, cmdLoad, True) = -99 Then
'Informing user the Bulk Load failed.
FormBulkLoadFailed = New MessagePlatform(11)
if not FormBulkLoadFailed is nothing then
FormBulkLoadFailed.ShowDialog()
End
End If
jdweng

Catching window closing events from JFrame

I'm having problems catching windowClosing() events from a JFrame (just doesn't get to my event listener it would seem!).
I register and setup a window listener in the constructor of my JFrame class. Prior to this I set the default close operation as DO_NOTHING_ON_CLOSE (as you're suppose to if tyou want to handle window closing events).
When user clicks on x (window terminate) button (in WIN systems), nothing is dispatched to my event listener. Any ideas?
Extract from constructor:
setDefaultCloseOperation(DO_NOTHING_ON_CLOSE);
addWindowListener(new MainWindowListener(this));
MainWindowListener looks as follows (EDImemConvert extends JFrame):
class MainWindowListener extends WindowAdapter
private EDImemConvert f;
public MainWindowListener(EDImemConvert f)
this.f = f;
public void windowClosing(WindowEvent e)
System.out.println("gets here...");
f.ReturnResources();
f.dispose();
System.exit(0);
}

This works for meimport java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class Test extends JFrame {
public Test() {
    addWindowListener(new WindowAdapter() {
      public void windowClosing(WindowEvent we) { System.exit(0); }
    setSize(300,300);
    setVisible(true);
public static void main(String args[]) { new Test(); }
}Normally, I just use this line
setDefaultCloseOperation(JFrame.EXIT_ON_CLOSE);
instead of adding a listener. It will clean up everything nicely.

Window-Closing Events

Please, clarify the sequence. When user clicks a "cancel" button on a JDialog's descedant, I make clean up and call dispose. I've hooked hide and dispose methods of the dialog and getting the followind sequence:
disposing
hiding
disposing
hiding
That is, hide and dispose are called twice by swing. Initially, I was considering using a hook at hide or dispose for performing a clean-up action. However, doing clean-up twice is bad idea.

Use java.awt.WindowListener and the Window.addWindowListener method (JDialog descends from Window). From the javadoc:
void windowClosed(WindowEvent e)
Invoked when a window has been closed as the result of calling dispose on the window.
void windowClosing(WindowEvent e)
Invoked when the user attempts to close the window from the window's system menu.
I haven't tested it to see how many times it gets called, but I would guess only once.

Fit object in window?

Does Illustrator for CS5.5 offer the oportunity to fit the object which is active in window? --or are the fit in window options limited to "All" or "Page"?
I find that when I'm working on an object that I must move in close to finesse a curve and then, ideally, would like to fit thet obect that I'm working on in the window to see if my tweaks are satisfactory.
At present I must. A zoom in to the points and/or curve I wish to adjust then B "fit page in window" then C zoom in again to the object I'm rendering then D center the object on screen. Seems like a lot of uncessary steps --particularly when I must repeat over and over during the rendering process.
Back in the day, Freehand solved this problem most elegantly with a "Fit Object In Window" command. The selected object would fill the screen --dead center everytime, no fuss.
Am I being nostalgic for a funcntion which Adobe doesn't value or have I overlooked the command in the menu somewhere?
Your assitance is greatly appreciated!

I see. Thank you Kurt.
Well it took Adobe a couple of deccades to realize that some of it's Illustrator users might want multi-paged documents. Perhaps in the coming deccades they'll get around to this otherwise very common command.
I'll go in search of those scripts and see how they work out.

SQLException Object has been closed

Hi!
Brief description of my webapp:
I have two pages, page1.jsp and page2.jsp.
Page1 contains an row set (JdbcRowSetXImpl) with database information, some Text fields binded to the dbcolums and a Hyperlink pointing on page2.
Page2 contains an row set (JdbcRowSetXImpl) with database information and shows the information in a Data Table.
What do I want to do ?
I want to open page2 from the Hyperlink in page1.
If I open page2, using the Hyperlink in page1, in the same browser window everything works fine.
Here is the problem:
If I open page2, using the Hyperlink in page1, in a new browser window (with JavaScript onclick windows.open method) I sometimes get the error SQLException [Sun][Oracle JDBC Driver]Object has been closed, se *) below.
How can i solv the problem and what am i doing wrong?
/Regards Krister
I[#|2004-10-13T10:44:24.914+0200|ALLVARLIG|sun-appserver-pe8.0.0_01|javax.enterprise.system.container.web|_ThreadID=12;|ApplicationDispatcher[/logviewer] Servlet.service() for servlet jsp threw exception
javax.faces.FacesException: java.sql.SQLException: [Sun][Oracle JDBC Driver]Object has been closed.
     at com.sun.jsfcl.data.RowSetDataModel.synchronize(Unknown Source)
     at com.sun.jsfcl.data.RowSetDataModel.access$100(Unknown Source)
     at com.sun.jsfcl.data.RowSetDataModel$CachedRowSetListener.rowSetChanged(Unknown Source)
     at javax.sql.rowset.BaseRowSet.notifyRowSetChanged(BaseRowSet.java:653)
     at com.sun.sql.rowset.JdbcRowSetXImpl.execute(Unknown Source)
     at com.sun.jsfcl.data.RowSetDataModel.initialize(Unknown Source)
     at com.sun.jsfcl.data.RowSetDataModel.create(Unknown Source)
     at com.sun.jsfcl.data.RowSetDataModel.setRowIndex(Unknown Source)
     at javax.faces.component.UIData.setRowIndex(UIData.java:380)
.....

Hm - your rowset stuff sounds fine. I wish I knew more about the hyperlink components - what you're encountering sounds strange.
Just one other rowset consideration, since that's where your error seems to come from - if a rowset is bound to a datatable component - your code should operate on the dataTableModel, not on the rowsets themselves.... (once the orginal binding is set in the constructor). Did you know about that? Not sure it is the root of your issue - just maybe related.
v

Hard drive not recognized during windows server 2008 setup

hard drive not recognized during windows server 2008 setup

Hi,
Whether the hard disk is recognized in BIOS?
Connect it to another computer to see if it could be recognzied incase the cause is the disk itself. Also please check if it is really a RAID instead of a single hard disk - a single disk should be recognized directly while RAID cannot be recognized until
a suitable driver is installed.
Please remember to mark the replies as answers if they help and un-mark them if they provide no help. If you have feedback for TechNet Support, contact [email protected]

How to tell embedded jinitator applet is still running when window closed

Hello, we are trying to accomplish the same thing that is mentioned in this post from Metalink. I've searched for a solution and hope someone here can help. Instead of restating the issue I think David Wilson does a good job of explaining what is needed. Can anyone please suggest a possible solution?
From: David Wilton 07-Oct-05 01:08
Subject: How to tell embedded jinitator applet is still running when window closed
How to tell embedded jinitator applet is still running when window closed
Hi,
We run an oracle 10g forms application through 9iAS over an intranet. All users are running windows 2000 professional.
We run separate frame = true but I would like to switch to separate frame = false
With separate frame = true if the user clicks the outer windows "X" close button (forms mdi window) the user is prompted to save changes before the application ends.
BUT
when using separate frame = false
If the user clicks the upper window "X" button (no longer form mdi window but regular browser window) the window and application is abruptly closed.
I'm interested in using a onbeforeunload function to confirm if the user wants to close the window. This would be placed in the basejini.htm file. This could always ask if the user wants to exit or not. If they click OK then the window closes but if they click "Cancel" you are returned to the forms application exactly where you left. something like event.returnvalue="do you really want to exit?";
However if the user exited using the normal exit form method then the applet is already closed before the onbeforeunoad event fires and there is nothing to go back to and I want the window to close automatically. This is accomplished using close.html file in post forms trigger.
So what I want and what I think many may also want is the check if the embedded applet is still running and if so prompt the user to return to the application or continue to close. Of course If the applet is no longer running then just close because there is no reason confirm closing anymore.
Does anyone have a html/JavaScript solution that can be placed in the jinitiator.htm file? or similar?
Thank you
David
[email protected]
From: Andrew Lenton 07-Oct-05 08:58
Subject: Re : How to tell embedded jinitator applet is still running when window closed
I don't know if this is exactly what you are after but you can add the following to the top of your basejini.htm file and it should prompt the user before exiting the IE window.
<BODY %HTMLbodyAttrs%>
%HTMLbeforeForm%
<SCRIPT>

</SCRIPT>
From: Oracle, mohammed pasha 07-Oct-05 09:55
Subject: Re : How to tell embedded jinitator applet is still running when window closed
David,
Well I could not understand your complete requirement.
Refer to Note.201481.1 How to Close the Browser Window When Closing Forms And How to Simulate SeparateFrame By Javascript
Note.115905.1 How to Close Browser Window When Closing Webforms Applet
Kind Regards,
Anwar
From: David Wilton 07-Oct-05 14:37
Subject: Re : How to tell embedded jinitator applet is still running when window closed
Thank you for your reply and yes you did not understand my question fully.
Sorry if this is a long reply
I am able to close the browser window using information in notes 115905.1 and 201481.1, this is not the issue. We implemented this several years ago. It is workable for both separate frame = true or false.
It is most important to not allow the user to end their forms application by closing the windows browser, they must close using normal form exit commands.
What I want is to have separate frame = false, the big drawback to this option is the user can exit the application and bypass all forms code by pressing the windows "X" close button. This is why we need the code as just provided by Andrew Lenton above in this thread.
BUT Andrew's code will always prompt the user before closing the window and I do not want that. I want the user to be prompted only under scenario 2 listed below.
Here's the 2 case scenario for exiting the application.
1. If the user closes properly and uses exit form which fires all normal form triggers including post_form with it's call to close.html file.
All uncommitted changes are saved or rollback and the users session is ended normally both on the database and in the application server.
All browser windows will close, great all is good. And without Andrew's code the window will close but with Andrew's code the user will be prompted to close or not, if they select Cancel the window will remain but the applet has already ended so why prompt? ...This is what I want to avoid.
2. In the forms app. if the user clicks the windows "X" close button with uncommitted changes. The browser just closes the changes are rollback without prompting the user to save. The users sessions are now lost and still running in the database and application server until they are timed out.
If I use Andrew's code then the user will be prompted to continue to close or go back, if they click Cancel to go back then focus returns to the forms application and the user can continue to work. If the user clicks OK then the window closes and unfortunately their sessions are still lost until timed out.
So what I desire is to add to Andrew's code to check if the embedded applet is still running and prompt the user to close or not accordingly.
Something like:
Basejini.htm like
</HEAD>
<SCRIPT LANGUAGE="JavaScript">
function maximizeWindow()
window.moveTo(0,0);
window.resizeTo(screen.availWidth,screen.availHeight);
function confirm(){
If(document.embeddedapplet.closed())
Win.opener = self;
win.close();
Else if
event.returnValue = "Closing Forms Application. OK to continue?";
</SCRIPT>
<BODY %HTMLbodyAttrs%, onload="maximizeWindow()", onbeforeunload="confirm()">
%HTMLbeforeForm%
I hope this explains my requirements.
David
From: Oracle, Evelene Raechel 10-Oct-05 06:45
Subject: Re : How to tell embedded jinitator applet is still running when window closed
Hi,
Note.199928.1 How to Alert User on Closing Client's Browser Window in Webforms
Regards,
Rachel
From: David Wilton 11-Oct-05 17:40
Subject: Re : How to tell embedded jinitator applet is still running when window closed
I'm sorry this is not helpful at all.
Note 199928.1 is only an alert which does not stop the closing of the window and still displays as an alert if the user does close properly using exit form ... so why would you want to display the alert then?
This is exaclty what I do not want and why I want to determine if the applet is still running before displaying any kind of message.
David
From: Oracle, Evelene Raechel 17-Oct-05 12:23
Subject: Re : How to tell embedded jinitator applet is still running when window closed
Closing thread.
Thanks,

Hello,
I had the same issue last year - wanting to provide a warning on closing the browser, but only if the Forms session is still running. The approach I took is described below, see also the thread where I originally posted this at Closing brower window
Hi there,I've had a similar requirement - or rather, the two conflicting requirements: to warn when the browser is being closed, but for the app to be able to close the browser without a warning being fired.
To always provide a warning when someone (the user or the Forms app) tries to go to a different page (e.g. your close.htm), use Javascript like:
function confirmExit(){
if(appletRunning==true) {
msg="Closing this window or navigating to another page will end your SomeGreatApp session.";
window.event.returnValue=msg;
And make a call to confirmExit() in the onBeforeUnload event of your main page.
You'll notice I first check an 'appletRunning' variable before displaying the warning. This Javascript variable is set to true by my app when it starts up, using an embedded Javabean that calls out to Javascript. Once that variable is set to true, then the warning will be displayed if the user tries to shut the browser by clicking on the 'x' button, or to go to a different URL.
When my app is shutting down, it uses the same Javabean to set appletRunning back to false. It then navigates to a close.htm - which will be done without a warning being displayed.
See Re: How can a Javabean call Javascript function of the basejpi.html?? for example code on how to call Javascript from a bean embedded in your Forms app.
Hope these ideas help you out, it's worked for me (so far, anyway!!)
James

How do I create multiple objects during runtime?

I don't know how to create multiple objects during runtime, here's my problem:
I get a String as input. Then I create an object called newobject. I put the object in a hashtable with the above string as key.
Then comes the problem, in order to create a new object, I have to rerun the same class, which uses the same name (newobject) to create a 2nd object. Now my hashtable doesn't reference to my 1st object anymore...
Is there anyway I can fill up the hashtable with different objects, and make each key point to each object it was supposed to?
For those who want to see a bit of the program:
public class PlayBalloon{
public Hashtable ht = new Hashtable();
for(){
Balloon pB = newBalloon;
newBalloon=new Balloon(pB);
ht.put("Some input from user", newBalloon);
for(){
ht.get(s).draw;<= s=string, draw=own meth. in Balloon
}

I think i can see the problem that you are having. You have, in effect, duplicate keys in your hashtable - ie, two strings used as keys with the same name.
The way that a hashtable works is as follows...
When you ask for a value that is mapped to a key it will go through the table and return the first occurence it finds of the key you asked for. It does this by using the equals() method of whatever object the key is (in your case it is a String).
If you cant use different Strings for your keys in your hashtable then i would consider writing an ObjectNameKey class which contains the String value that you are trying to put in the hashtable and an occurrence number/index or something to make it unique. Remember to override the equals method in your ObjectNameKey object or else the hash lookup will not work. For example
class ObjectNameKey {
    private String name;
    private int occurence;
    public ObjectNameKey(String name, int occ) {
        this.name = name;
        this.occurence = occ;
    public String getName() {
        return name;
    public String getOccur() {
        return occurence;
    public boolean equals(Object o) {
        if (!(o instanceof ObjectNameKey)) {
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        ObjectNameKey onk = (ObjectNameKey)o;
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File Server Resource Manager will not load WMI Objects on Windows 8.0/8.1 Preview with Hyper-V and Server Tools Loaded

Hi Folks,
I have a problem getting "File Server Resource Manager" to start properly because WMI objects are not loading??? I don't understand this at all because I am able to access them with other Apps, etc. I have been over my Services list as well but
have not yet discovered which Service turns on/off "File Server Resource Manager". I have looked in Windows\System32\ and I can not find SrmSvc. I found other Srm's there though. I also found the FSRM Snapin which generates the Figure below but I
can not find it in the WMI Browser. I believe the Firewall is OKAY since I have been over that thoroughly. I do have the Server Tools Installed for Windows 8.0 or Windows 8.1 Clients as well as the Windows Updates applied, which is where I got "File Server
Resource Manager" in the first place. I have had WMI and Powershell 3.0 Package, installed since Windows 7 but I run a repair on them anyway.
I have read through "File Server Resource Manager could not load WMI objects on Windows Server 2012
Article ID: 2831687" but since I don't seem to have SrmSvc the solution doesn't help me. I haven't been able to find a similar one for the Windows Client.
If there is anything you could share on this problem I would be much obliged.
Thanks again,
Crysta
PhotM Phantom of the Mobile

Hello,
The Windows Desktop Perfmon and Diagnostic tools forum is to discuss performance monitor (perfmon), resource monitor (resmon), and task manager, focusing on HOW-TO, Errors/Problems, and usage scenarios.
As the question is off topic here, I am moving it to the
Where is the Forum... forum.
Karl
When you see answers and helpful posts, please click Vote As Helpful, Propose As Answer, and/or Mark As Answer.
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HT3986 i get a black screen during windows 7 installation on bootcamp 5.0.1

i get a black screen during windows 7 installation on bootcamp 5.0.1 , it wont install

Hi wb2009,
I haven't found that the TV would be an issue, but did find an article that states to not have extra USB devices connected.
Boot Camp: Windows installation boots to black screen with blinking cursor
http://support.apple.com/kb/TS4536
The Windows installation may boot to a black screen with a blinking cursor. This can occur if you use a USB optical drive or USB Flash drive for the Windows installation and another USB device is also connected to the computer.
There's another article that mentions Windows XP or Vista that may apply.
Archived - Boot Camp: Start up to black screen after installing Windows
http://support.apple.com/kb/TS2600
Thank you for visiting Apple Support Communities.
Nubz

Black screen during windows 7 install on 27inch iMac

My iMac turns to a black screen during windows 7 boot camp install. I can use the install disk on my wifes Macbook Pro so I know that the media is good.

Please re-post in the Boot Camp forum.

When I open itunes I get a 'DATA EXECUTION PREVENTION' 'Windows closed program'. Can anybody help please.

When open iTunes it starts OK then a message from Windows appears, 'DATA EXECUTION PREVENTION Windows closed program'. Then the whole thing shuts down. Does anybody know how to sort this out please. I am using XP operating system and have recently updated iTunes. Thanks

Hi alanfromharlow,
It sounds as if iTunes is failing to launch properly on your Windows computer. You don’t mention what version of Windows you have, but one of these two articles should be useful to you -
iTunes for Windows Vista, Windows 7, or Windows 8: Fix unexpected quits or launch issues
http://support.apple.com/kb/TS1717
iTunes for Windows XP: Troubleshooting unexpected quits, freezes, or launch issues
http://support.apple.com/kb/TS1421
Thanks for using Apple Support Communities.
Best,
Brett L

CS3 Extension that initializes a JS-Object during startup is not working in CS4

Here is a simple Extension that works fine in DW CS3 and doesn't work in DW CS4 (trial version):
The File myObj_Startup.htm was placed in Folder Configuration/Startup. It initializes a quite simple Javascript-Object during Startup of DW.
Content of myObj_Startup.html:

<HTML>
<HEAD>
<TITLE>beim Öffnen</TITLE>
<SCRIPT LANGUAGE="javascript">
myObj =
     showMsg : function (msg)
         alert(msg);
function onOpen()
   myObj.showMsg("startup");
// SCRIPT ENDE
</SCRIPT>
</HEAD>
<BODY onLoad="onOpen();">
</BODY>
</HTML>
Besides this, an additional menuitem was defined in menus.xml to use the JS-object myObj:
<menu mmstring:name="menus/DWMenu_File" id="DWMenu_File">
        <menuitem name="Test" command="myObj.showMsg('Testing');" enabled="true" domRequired="false" id="DWMenu_File_SIEMENSTEST" />
        <menuitem mmstring:name="menus/DWMenu_File_New" key="Cmd+N" command="dw.newDocument()" enabled="true" domRequired="false" id="DWMenu_File_New" />
With Dreamweaver CS3 everything works out fine: I get a Alert-message: "startup" during Startup and when I'm clicking Menu->File->Test I get a Alert-message: "Testing".
With Dreamweaver CS4 (trial version) I get a message: "startup" as well but when I'm clicking Menu->File->Test I get no message.
Instead I get a Logfile "C:\Documents and Settings\user\Application Data\Adobe\Dreamweaver CS4\en_US\Configuration\Logs\DW JavaScript.log" telling me:
   JS Error:
       myObj is not defined
       filename:
       lineno: 0
       While executing DWMenu_File_TEST command in menus.xml, the following JavaScript error(s) occurred:
       ReferenceError: myObj is not defined
Why is this simple extension working in DW CS3 and not working in DW CS4?
Did they change the treatment of JS-objects initialized during startup?
Is the object out of scope?
Are such extensions not working in trial versions of DW CS4?
I cannot explain this behavior - please help!

Hi,
I have an similar problem and couldnt find an workaround for the problem.
When i add an new menu item to the menus.xml file, the menu item shows up, but my custom command (simple alert) wont trigger.
Can somebody please help?

Data changes saved when pop-up window closed instead of using Save button/action.

We encountered an odd application behavior and we cannot tell if this is standard functionality or not. When a spec is an a workflow step that is Signature Request, the Requestee can open a link to view the spec. When the user also has edit permissions, they get the edit icon in the popup window. We had a user that editted the spec then decided not to save the changes, so used the Close (red ex on popup) instead of the Action: Cancel button on the application menu. User expected that changes made would not be saved. It turns out that clicking the window closed save the modifications without any warning. User expected Close to work like Cancel instead of Save. Is this normal application behavior?
Details. Version 6.1.1.1 on IE9 with popup.

Did they make a change, close the popup, then workflow the Signature Request? Is so, then this is behavior we expect: When you are viewing a spec, you are viewing the in memory version of it, meaning that if you edit the spec, the changes are made to the in-memory version. If then clicked close, the in memory data is still loaded for that spec, and it may be that the signature request workflow event then saves the spec with those changes. The cancel button would have reverted the changes.
You can, however, log an Enhancement Request for having the window close act like the Cancel.
Thanks
Ron

Dispose objects during window closing

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