"duplicate button press" problem in jsf 1.1

I think the problem come from "duplicate button press", when the users press the button several time, many request is generated, the sad is I don't have the source code of this page, I just have the source code which receive these request, what I want to do is just handle the first request from the button and ignore the other, is it possible?
also, because I can't modify the problematic button page (I have not the source), so even I upgrade to jsf 1.2 is not useful, is it?
thanks!!

First, let me say that it is strange to try to solve this problem without being able to modify the source page. If this is a political or administrative restriction rather than a real technical limitation I suggest you push back on whomever has created this situation.
The most effective method I can thing of would be to remove the state of the view from the session (assuming server side state saving) upon receiving the first request. This will cause the subsequent requests to fail. Although, this might not be the best due to timing issues. Also, keep in mind that the user will just see the error message, they will not get the results of the first request.
So maybe a filter which intercepts the requests. It could perform duplicate detection by hashing all of the request parameters. You could even keep the responses around to resend. Oops, I've just re-invented HTTP caching; perhaps interjecting a product which already performs that role would be appropriate instead.

Similar Messages

Facing duplicate button press problem.

Hi,
I am a beginner to JSF technology. I am working on a project that uses JSF 1.1 specification. I am facing "*duplicate button press problem*". Most of the links and submit buttons do not respond. With a lot of search I found that this problem was fixed in JSF 1.2.
I want to know whether upgrading to JSF 1.2 will work or not ? Also will it require code changes in existing code or simply upgrade will do?
- Sax

I'm not sure why you are focused on 1.1 vs 1.2 on this issue. For both versions you need the POST-REDIRECT-GET pattern, facilitated by the <redirect/> directive in the navigation rules.

Problem while hide a block on selection screen on button press

Hi,
I have added two buttons on the application toolbar of the selection screen. I have input fields under two blocks on the selection-screen. Initially the second block is hidden. If I press the button 1 the second block should be made visible.
For this to happen, I captured the button 1 click event using the following statement.
IF sscrfields-ucomm = 'FC01'.
Inside the if ... endif, I looped at the screen and made the second block visible. It was working fine.
loop at screen.
if screen-group4 = '013'.
     screen-invisible = 1.
     screen-active    = 0.
endif.
endloop.
Later the second button was added. Now when i run the report for the first time, if button 2 is clicked the hidden block appears on the selection screen even though i have not added any code for it.
Just to check, i commented the logic to display the hidden block on button 1 click event. Even without any code the first time i press any of the two buttons added on the application toolbar the hidden block is displayed.
I saved a variant for the report.
During execution of the report, if i select any variant then the hidden block is displayed.
Can anyone please tell me how to fix this problem.
Regards,
T2.

Hi All,
The problem is solved.
Everyone was confusing between the pushbutton on the selectio-screen and on apllication toolbar
(where you have the execute icon).
Please find the code below. Thanks for you time and help. I appreciate it.
REPORT ztest.
INCLUDE <icon>.
* TABLES                                                              *
TABLES: t001,              " Company Codes
        lfa1,              " Vendor Master (General Section)
        sscrfields.        " Fields on selection screens
* To capture button press event.
DATA: gv_button_press       TYPE c.
* Menu Painter: Program interface for dynamic texts
DATA: gs_dyntxt             TYPE smp_dyntxt.
* SELECTION SCREEN                                                    *
SELECTION-SCREEN FUNCTION KEY 1.
SELECTION-SCREEN BEGIN OF BLOCK blk1 WITH FRAME TITLE text-s01.
* Company Code.
SELECTION-SCREEN BEGIN OF BLOCK ccode WITH FRAME TITLE text-s02.
SELECT-OPTIONS: s_bukrs FOR t001-bukrs OBLIGATORY MEMORY ID buk.
SELECTION-SCREEN END OF BLOCK ccode.
SELECTION-SCREEN END OF BLOCK blk1.
SELECTION-SCREEN BEGIN OF BLOCK dsel WITH FRAME TITLE text-s04.
* Vendor Master.
SELECTION-SCREEN BEGIN OF BLOCK vend WITH FRAME TITLE text-s07.
SELECT-OPTIONS: s_konzs FOR lfa1-konzs MODIF ID aw1.
SELECT-OPTIONS: s_txcd1 FOR lfa1-stcd1 MODIF ID aw1.
SELECT-OPTIONS: s_txcd2 FOR lfa1-stcd2 MODIF ID aw1.
SELECTION-SCREEN END OF BLOCK vend.
SELECTION-SCREEN END OF BLOCK dsel.
* INITIALIZATION                                                       *
INITIALIZATION.
* Populate the Application toolbar button attributes.
PERFORM populate_app_toolbar_buttons.
* Hide the dynamic screen intially.
PERFORM hide_screenfields.
* AT SELECTION SCREEN                                                  *
AT SELECTION-SCREEN.
* Capture the button press event.
PERFORM capture_button_press.
* AT SELECTION-SCREEN OUTPUT.                                          *
AT SELECTION-SCREEN OUTPUT.
* Show/Hide the dynamic selection screen based on button press.
PERFORM adapt_screen.
*& Form populate_app_toolbar_buttons                                 *
*   Display Icon on the application toolbar buttons. Also set the      *
*   function codes for these buttons.                                  *
FORM populate_app_toolbar_buttons.
CLEAR gs_dyntxt.
WRITE icon_fencing     TO gs_dyntxt-icon_id AS ICON.
MOVE text-b01         TO gs_dyntxt-quickinfo.   " Dynamic Selections
MOVE gs_dyntxt         TO sscrfields-functxt_01.
ENDFORM.                    " populate_app_toolbar_buttons
*& Form hide_screenfields                                            *
*   Initially hide the Dynamic selection screen.                       *
FORM hide_screenfields.
LOOP AT SCREEN.
    IF screen-group1 = 'AW1'.
      screen-invisible = '1'.
      screen-active    = '0'.
    ENDIF.
    MODIFY SCREEN.
ENDLOOP.
ENDFORM.                    " hide_screenfields
*& Form capture_button_press                                         *
*   Set the flag based on button press event. Appication bar button    *
*   tcode is available only at 'At Selection-screen' event.            *
*   Use the captured data at 'At Selection-screen Output' event.       *
*   Screen adjustments is possible only under this event.              *
FORM capture_button_press.
IF sscrfields-ucomm = 'FC01'.
    IF gv_button_press IS INITIAL.
      gv_button_press = 'X'.
    ELSEIF gv_button_press EQ 'X'.
      CLEAR gv_button_press.
    ENDIF.
ENDIF.
ENDFORM.                    " capture_button_press
*& Form adapt_screen                                                 *
*   Show/Hide the dynamic selection screen based on button press       *
*   captured at 'At selection-screen' event.                           *
FORM adapt_screen.
* If button press flag is initial hide the dynamic selection screen.
IF gv_button_press IS INITIAL.
    LOOP AT SCREEN.
      IF screen-group1 = 'AW1'.
        screen-invisible = '1'.
        screen-active    = '0'.
      ENDIF.
      MODIFY SCREEN.
    ENDLOOP.
* Elseif button press flag is 'X' show the dynamic selection screen.
ELSEIF gv_button_press EQ 'X'.
    LOOP AT SCREEN.
      IF screen-group1 = 'AW1'.
        screen-invisible = '0'.
        screen-active    = '1'.
      ENDIF.
      MODIFY SCREEN.
    ENDLOOP.
ENDIF.
ENDFORM.                    " adapt_screen
Regards,
T2
Message was edited by: Titu Joseph

Error -- No Such Trigger('when-button-pressed')

Hi,
I am getting the error ""No Such Trigger('when-button-pressed')"",
when I am executing the code EXECUTE_TRIGGER( 'WHEN-BUTTON-PRESSED' );
on some item(Key-Next-Item), although WHEN-BUTTON-PRESSED trigger exists.
What could be the problem ?. It worked till yesterday, giving error from today, I havent
changed any thing.
Thanks in Advance
Devender

Steve's tip is the only good solution for this case.
The problem in your case for example is:
Let's say you have a block-trigger, which fires after your execute-trigger.
Now a colleague of you, which don't know your code, create a WHEN-BUTTON-PRESSED on an item, then the new code is started and not the block-trigger-code.
So, don't ever do this. Write your code in a package-function or -procedure and call it from the trigger. So you can re-user the functionality
Gerd

Why am I getting this error? How do I add confirm message to button press?

Using Java Studio Creator.
I do not understand why I am getting the following page error:
Description: An unhandled exception occurred during the execution of the web application. Please review the following stack trace for more information regarding the error.
Exception Details: java.lang.IndexOutOfBoundsException
Index: 0, Size: 0
Possible Source of Error:
Class Name: java.util.ArrayList
File Name: ArrayList.java
Method Name: RangeCheck
Line Number: 546
======================================================================
I have a page that works.
It has a button that is created in the session bean code with the following java:
button = (HtmlCommandButton)application.createComponent(HtmlCommandButton.COMPONENT_TYPE);
button.setActionListener( application.createMethodBinding("#{ScheduleEditSessionBean.mainApply}", new Class[]{ActionEvent.class} ));
button.setId( "applyUndates" );
button.setType( "submit" );
button.setTitle( "Apply updates.");
button.setValue( "Apply" );
button.setStyle(style);
children.add(button);
When the button is pushed, it calls the following session bean method:
public void mainApply(ActionEvent actionEvent)
updateScheduleData();
scheduleAdjustFlag = 1;
dataApplied = true;
dataSaved = false;
addControls();
This all works just fine - no errors
====================================================================
I wanted to add confirmation to the button press, so I removed the action listener for this button and added
a javascript function call for the onclick method
button = (HtmlCommandButton)application.createComponent(HtmlCommandButton.COMPONENT_TYPE);
style = "text-align: center; font-family: 'Arial','Helvetica',sans-serif; " + font + " height: 22px; width: 115px";
// Commented out this line button.setActionListener( application.createMethodBinding("#{ScheduleEditSessionBean.mainApply}", new Class[]{ActionEvent.class} ));
button.setOnclick("confirmApply()"); // Added this line.
button.setId( "applyUndates" );
button.setType( "submit" );
button.setTitle( "Apply updates.");
button.setValue( "Apply" );
button.setStyle(style);
children.add(button);
I added a dummy button to the page that has the following call to execute the mainApply method in the sessioon bean.
The button action just calls the mainApply() method in the session bean
public String mainApplyBtn_action() {
seb.mainApply();
return null;
Added the javascript to the page that simply pushes the dummy button if confirmed.
function confirmApply()
if( confirm( 'Are you sure you want to Apply these changes?' ) )
form1["form1:mainApplyBtn"].click();
The session bean method looks like this it is the same method as before, but without the action event argument.
public void mainApply()
lsb.logMsg( "<ScheduleEditBean.mainApply> Main apply pushed" );
updateScheduleData();
scheduleAdjustFlag = 1;
dataApplied = true;
dataSaved = false;
addControls();
==================================================================================
Now, when I push the original 'Apply' button, I get the confirmation box just like I expected.
But when I confirm the question, I get the error at the top of this post.
If I push the 'dummy button' directly, I do not get the error.
I do not understand why I should be gettng this error.
Can anyone give me a clue as to why this change would cause the problem?
The error is related to an ArrayList.
I use several of these on the page, but they should be filled with data in the preRender method of the page.
Can anyone suggest a way that I can add confirmation to a button that is created under program control?
Thanks

Make use of the fact that when an onclick event of a button returns 'false', the action will not be taken.
Pseudocode:<h:commandButton value="submit" action="#{myBean.action}" onclick="return confirm('Are you sure?');" />

Sending an object from client to server always on button press

What I need is to send an object from client to server but I need to make server wait until another object is sent. What I have is the JFrame where you put the wanted name and surname, then you create a User object with these details and on button press you send this object to the server. I just can't hold the connection because when I send the first object, server doesn't wait for another button click and throws EOFexception. Creating the while loop isn't helpfull as well because it keeps sending the same object again and again. The code is here
public class ClientFrame extends JFrame {
    private JButton btnSend;
    private JTextField txfName;
    private JTextField txfSurname;
    public ClientFrame() {
        this.setTitle(".. ");
        Container con = this.getContentPane();
        con.setLayout(new BorderLayout());
        txfName = new JTextField("name");
        txfSurname = new JTextField("surname");
        btnSend = new JButton(new AbstractAction() {
            @Override
            public void actionPerformed(ActionEvent e) {
                SSLSocketFactory f =
                        (SSLSocketFactory) SSLSocketFactory.getDefault();
                try {
                    SSLSocket c =
                            (SSLSocket) f.createSocket("localhost", 8888);
                    c.startHandshake();
                    OutputStream os = c.getOutputStream();
                    ObjectOutputStream oos = new ObjectOutputStream(os);
                    InputStream is = c.getInputStream();
                    ObjectInputStream ois = new ObjectInputStream(is);
                    boolean done = false;
                    while (!done) {
                        String first = txfName.getText();
                        String last = txfSurname.getText();
                        User u = new User();
                        u.setFirstName(first);
                        u.setLastName(last);
                        oos.reset();
                        oos.writeObject(u);
                        String str = (String) ois.readObject();
                        if (str.equals("rcvdOK")) {
                            System.out.println("received on the server side");
                        } else if (str.equals("ERROR")) {
                            System.out.println("ERROR");
                    //oos.writeObject(confirmString);
                    oos.close();
                    os.close();
                    c.close();
                } catch (ClassNotFoundException ex) {
                    Logger.getLogger(ClientFrame.class.getName()).log(Level.SEVERE, null, ex);
                } catch (IOException ex) {
                    System.err.println(ex.toString());
        btnSend.setText("send object");
        con.add(btnSend, BorderLayout.PAGE_START);
        con.add(txfName, BorderLayout.CENTER);
        con.add(txfSurname, BorderLayout.PAGE_END);
        this.pack();
        setSize(200, 150);
        setVisible(true);
public class TestServer {
    public static void main(String[] args) {
        try {
            KeyStore ks = KeyStore.getInstance("JKS");
            ks.load(new FileInputStream(ksName), ksPass);
            KeyManagerFactory kmf =
                    KeyManagerFactory.getInstance("SunX509");
            kmf.init(ks, ctPass);
            SSLContext sc = SSLContext.getInstance("TLS");
            sc.init(kmf.getKeyManagers(), null, null);
            SSLServerSocketFactory ssf = sc.getServerSocketFactory();
            SSLServerSocket s = (SSLServerSocket) ssf.createServerSocket(8888);
            printServerSocketInfo(s);
            SSLSocket c = (SSLSocket) s.accept();
            InputStream is = c.getInputStream();
            ObjectInputStream ois = new ObjectInputStream(is);
            OutputStream os = c.getOutputStream();
            ObjectOutputStream oos = new ObjectOutputStream(os);
            boolean done = false;
            User u;
              while(!done){
                u = (User) ois.readObject();
                String confirmString = "rcvdOK";
                String errorString = "ERROR";
                if (u != null) {
                    System.out.println(u.getFirstName() + " " + u.getLastName());
                    oos.writeObject(confirmString);
                } else if (u == null) {
                    oos.writeObject(errorString);
            is.close();
            s.close();
            c.close();
        } catch (Exception e) {
                System.err.println(e.toString());
}Thanks for any help, btw this doesnt need to be via ssl, the problem would be the same using only http. Please anyone help me:)
Edited by: Vencicek on 7.5.2012 2:19
Edited by: EJP on 7/05/2012 19:53
Edited by: Vencicek on 7.5.2012 3:36

Current code fails because it's sending still the same entity again(using while loop)No it's not. You are creating a new User object every time around the loop.
which makes the system freezeWhich means that you are executing network code in the event thread. Don't do that, use a separate thread. At the moment you're doing all that sending inside the constructor for ClientFrame which is an even worse idea: you can never get out of there to the rest of your client program. This is a program design problem, not a networking problem.
and doesn't allow me to set new parameters of the new entityI do not understand.
I need to find a way to keep Server running even when the client doesn't send any data and wait until the client doesnt press the send button again to read a new object.That's exactly what happens. readObject() blocks until data is received.

Standard button image problem

Hi,
I've got a problem when I try to set Image to the button from standard components.. I can set it up, but than I didn't see the image in the browser.
With the button from basic components there is everything working fine, unfortunately I need that component from standard.. any advice?
thx.

Hi,
I've got a problem when I try to set Image to the button from standard
components.. I can set it up, but than I didn't see the image in the browser.
With the button from basic components there is everything working fine,
unfortunately I need that component from standard.. any advice?
thx.Standard button has problems with images due to a JSF issue. To work around the issue, remove leading / from the buttons image property and re-deploy. This should cause the standard button image to display correctly.
Hope it helps,
Lark

Ticker bean and WHEN-BUTTON-PRESSED trigger

Hi,
In Forms 6i, I use the Ticker bean. The problem with it, is that it appears on all canevas of my form.
But if the bean is "stopped" (i.e. the clock is stopped), it works fine and it does not appear on the next canevas I show.
However, I must have a button for the "stop" and another one that shows my next canevas. If I put the two code lines in the same WHEN-BUTTON-PRESSED trigger of a unique button, the ticker bean is still visible in the new canevas.
Any help is appreciated.
Regards,
Olivier.

Olivier,
I think I remember having heard of this before. The reason for this could be that the ticker bean uses AWT classes, which are heavyweight. All you can try is to call
synchronize;
between starting and stopping the ticker if using one button only. If this doesn't help, then I don't know of any other solution that could work.
Frank

Jump at end of play to the previous button pressed DVDSP4

I know this subject has been covered well but I still can't find the correct answer. Is there a way to return to the last button pressed in a menu without using scripts? I have only simple tracks and slideshows.
I have created two scripts that work very well for the tracks but the slideshows will not run he pre script and thus will not return to the last button pressed.
Any answers/help here will be greately appreciated.
Ken

This is Ken. I just found the answer to my problem by going back to the manual for the 1000th time. My jumps in the slideshows were all to the first slide which DFDSP4 says will not go to a pre-script. I found that the jumps could go to the word "slideshow" in each slideshow asset and in that format everything works as expected.
Sorry for this post but I've spent 2 days on this problem.
Regards, Ken

Overide on-error with when-new-button-pressed

Hi,
I have a big problem and not much time to solve it so posting on here hoping someone will know the answer. I have put an exit button on my form which calls a method that uses GO_FORM to return to a menu page.
I don't want to close oracle forms down completely so I can't use the exit_form command. However I want the close button to return the user to the menu without validating or saving the current form.
My problem is that I catch errors in a date field using an on-error trigger and this always fires before the when-button-pressed meaning my user gets an error before leaving the form.
How do I ignore the on-error trigger when my close button is pressed and not when exiting the field which contains the date.
I have tried setting the execution hierarchy to after on the on-error and override on the when-button-pressed but this seems to have no effect.
Thanks for any help
Dan

One solution would be to add a menu for the form. For some reason menu items and toolbar buttons don't cause the loss of focus to occur. If you used a menu to fire a trigger to close the form then you could set a flag that could be checked in your on-error trigger. If the flag was true(or whatever) then you don't perform your validation.
I'm usually angry that the toolbars and menus don't cause those triggers to fire, but I've had a couple cases similar to this where it actually works out for the better. Not sure if having a menu for, what sounds to me like, a dialog will look the best, but it should work.

FRM-40732 ORA-06502 in when button pressed triger

I Have a the code below in when button pressed
If :block1.text_item is not null Then
:control.title := :block1.text_item
end if;
go_block('block2);
Here the when button-button-pressed unhandled exception Frm-40735 Ora-06502 appears. I know this may be because of datatype problem, but how would I know the culprit item. The form allow the user to save the data. Am using forms 6i 10G database.

Can check the maximum length of :control.title
It seems that it can handle the amount of data you are assigning to it

Problems in JSF t:commandlink

Hello,
I am facing a problem with JSF Command link
I have three JSP pages with one backing bean in session scope.The property defined in the backing bean is an Object type which contains fields mapped to the database.
The navigation between pages is through hyperlinks.
I enter data on page 1 and move to page 2.Again due to some reasons if I come back to first page I dont see values restored on the textfields on page 1.It is again reset when page 1 loads.I have to restore values and I have to do it using command links.I do not want button to navigate between two pages.
How can I restore data
I set the data on textfields as #{BackingBean.property.property_field}
I am new to JSF.can anyone suggest how to restore values while navigating.
[email protected]
Thankyou,
Pankaj Shirke

on the commandLink tag are you using the immediate = "ture" if so remove it or set it to false

Flv "white flash" in between videos playing when button pressed.

I am currently working on a catalyst project whereby the buttons pressed play different sections of an animation. My problem is that the animation flashes white for a split second in between pressing the button and the video playing. Does anyonyone know how to eliminate this white flash? Would really appreciate any help,
Cheers,
Dan

Hello all,
Yes to follow up Ben, I'm experiencing the exact same problems as him. I changed browser to Firefox 3.0.11 a couple of months ago and hence downloaded the Flash plugin for Firefox. I noticed the issue straight away in Youtube, but not on other sites. As I attributed the problem to Firefox, I then downloaded Opera 9.64 - but experienced the same problem. This led me to believe the issue was the Flash plugin, as both browsers are served by the same Adobe plugin for 'alternative browsers' to IE.
I then tried IE6 again in youtube and it didn't have the problem on standard view, however the problem was (and still is) occurring in full screen view. I'm nearly 100% sure this problem didn't occur before I downloaded the Flash plugin for Firefox / Opera. Regardless of whether that is the issue, the problem was definitely not happening on my system in IE6 earlier this year.
As Ben said, my computer is fairly old but well managed and up to date. OS is Windows 2000 SP4, system is AMD Athlon 900 (slot A), 512 Mb RAM, 16Mb Voodoo 3 graphics, m/board MSI MS-6191.
I've also tried removing the Flash plugin for Firefox/Opera and for IE6 and reinstalling it but had no joy there either. I would try an updated version of IE too but IE6 is the last version compatible with Win 2k.
Any help appreciated, thanks.
Matt

Frm-40735 when-button-pressed trigger raised unhandled exception ora-03114

hi everybody,
i am using oracle 10g release 2 in my test server and 10g release 1 in production server with forms in 10g running through the oracle 10g application server with no problem with our production server.
but the same form when i try to use through the same application server for my
with my test database server which is oracle 10g release 2 is giving me
frm exceptions and disconnecting the session.
like i get frm-40735 when-button-pressed trigger raised unhandled exception
ora-03114. then frm-40655 sql error forced rollback;clear form and reenter transaction. then when i try to exit it shows ora-24324 service handle not initialized.
The same thing when i try with my production server i dont get any exception handle error or forced rollback error.
i am not facing any problem as such to connect to my test database(release 2)
through sql plus client or TOAD OR ENTERPRISE MANAGER THEY ARE ALL FINE. IT IS ONLY WHEN I GO THROUGH THE APPLICATION SERVER TO ACCESS MY FORMS I GET THIS ERROR. BUT MY PRODUCTION IS RUNNING THE SAME WAY WITH NO ERRORS.
any suggestions welcome as i have to bring release 2 in the production next month
thanks and regards
manish

ORA-03114 not connected to ORACLE
Cause: A call to Oracle was attempted when no connection was established. Usually this happens because a user-written program has not logged on. It may happen if communication trouble causes a disconnection. In addition, this message could occur when ALTER SYSTEM KILL SESSION or ALTER SYSTEM DISCONNECT SESSION were issued with the IMMEDIATE qualifier because, in those cases, the client's connection to the database is terminated without waiting for the client to issue a request.
Action: Try again. If the message recurs and the program is user written, check the program.
zaibi.

FRM-40735: WHEN-BUTTON-PRESSED trigger raised unhandled exception ORA-04063

Hi experts,
This problem as titled happened to me recently, and i found no way out.
I collected the FRD information, what i can get is:
GMDRCDSG, 11, Prog Unit, Entry, 361120504, /XGMDSRCHGMD_BASIC_SEARCH_PKG/INIT_GROUP
Unhandled Exception ORA-04063
State Delta:
Error Message: FRM-40735: WHEN-BUTTON-PRESSED trigger raised unhandled exception ORA-04063.
ON-ERROR Trigger Fired:
Form: GMDRCDSGORA-04063 means some database object is broken, but this information does not specify exactly which
object it is . I thought it is caused by GMD_BASIC_SEARCH_PKG, which is programmed in GMDSRCH.pll.
So i recompiled the pld file, but didn't work.
The further action i took is to find out all the invalid package/package body in database, and recompile them.
Unfortunately, this also didn't work.
Any help is greatly appreciated, thanks in advance:)
Ted

Could anybody help? Please.
Thanks,
Ted

"duplicate button press" problem in jsf 1.1

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