Prevent navigation on pending error

hi
Please consider the Oracle Magazine article "Catch Me If You Can " by Frank Nimphius
at http://www.oracle.com/technetwork/issue-archive/2013/13-mar/o23adf-1897193.html
It refers to a sample application
at http://www.oracle.com/technetwork/issue-archive/2013/13-mar/o23adf-1896561.zip
The article describes how to use the sample application to navigate to and edit an HR.EMPLOYEES record, and to update the Email field to get an error for a unique key constraint validation thrown by the database.
The article sample allows to navigate away from the HR.EMPLOYEES record with invalid Email field value, to another HR.EMPLOYEES record (via the HR.DEPARTMENTS navigation buttons).
Changing the Email field (in a valid way) on the other HR.EMPLOYEES record and clicking the Commit button will result again the unique key constraint error message.
But, the error message is about the first change (which was left without being corrected) while the second (correctly changed) record is shown.
see the screencast at http://screencast.com/t/xF6OhFABuRN
- (q1) How can the sample (in o23adf-1896561.zip) be improved to prevent such navigation away from a "pending error"?
many thanks
Jan Vervecken

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Prevent navigation when error occurs

I have a use case where an error may occur during the INVOKE_APPLICATION phase. If it does, I need to stay on the same page and show the user the error. I am using a PhaseListener to detect the error (in the afterPhase of the INVOKE_APPLICATION phase). If there is an error, I show it to the user by calling FacesContext.getCurrentInstance().addMessage(null, errorMessage);. This works. The problem is, it continues navigation to the next view. For example, if the user clicked the Save button and that button returns to the previous page, I want the user to stay on this page if there is an error. I tried calling FacesContext.getCurrentInstance().renderResponse() to bypass the navigation, but that didn't work. Then I tried calling FacesContext.getCurrentInstance().responseComplete();. This did bypass navigation, but the error didn't show up for the user to see.
This seems like a common use case, so I must be missing some obvious way to do this.
Thanks for your help!
Cheers,
Mike

Hi,
What kind of error? When does it happen exactly? I doubt PhaseListener will be the best solution. Assuming it is for the purpose of this post, however, it would be:
private static final ThreadLocal<UIViewRoot> root = new ThreadLocal<UIViewRoot>();
public void beforePhase(PhaseEvent ev)
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public void afterPhase(PhaseEvent ev)
    try
        if (detectError())
            FacesContext context = ev.getFacesContext();
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}Regards,
~ Simon

Navigation Not Possible error

Hi All,
We are getting navigation not possible error while creating Travel Expenses.
Recently our system was upgraded from EHP5 to EHP6.
We have copied standard launchpad and we have assigned that custom launchpad role to the user.
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Getting This Error - IO Already pending error Iplanet

Hi,
I'm getting this error on Iplanet Web Server 7.0.9
Does anyone know this issue?
[14/Mar/2013:15:35:24] failure ( 5092): HTTP3068: Error receiving request from xx.x.xx.xx (IO already pending error)
[14/Mar/2013:15:35:25] failure ( 5092): HTTP3068: Error receiving request from xx.x.xx.xx (IO already pending error)
[14/Mar/2013:15:35:26] failure ( 5092): HTTP3068: Error receiving request from xx.x.xx.xx(IO already pending error)
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[14/Mar/2013:15:35:26] failure ( 5092): HTTP3068: Error receiving request from xx.x.xx.xx (IO already pending error)
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Edited by: user6593769 on Mar 14, 2013 9:47 AM

Hi,
I have never seen that issue before. I would confirm
1. Is this a supported version of Windows?
2. Are you using a VM?
The error itself occurs when the client connection is being read. The read process has returned no data and printed the Windows error message. Maybe something
else is reading on the socket.
regards,

Premiere 7.1 Media Pending Error

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Prevent navigation on uncommitted data

hi
Please consider the example application created using JDeveloper 11.1.2.3.0
at http://www.consideringred.com/files/oracle/2013/UncommittedDataReviewApp-v0.01.zip
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It allows to get warnings like
"This page contains uncommitted data.
Would you like to perform navigation?
Pres OK to continue, or Cancel to abort navigation."
which allow you to choose if you want to continue the navigation or not.
See also the screencast at http://screencast.com/t/IBujeLmKE
question :
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- [1] see http://docs.oracle.com/cd/E35521_01/apirefs.111230/e17491/tagdoc/af_document.html
- [2] see http://docs.oracle.com/cd/E35521_01/apirefs.111230/e17491/tagdoc/af_checkUncommittedDataBehavior.html
many thanks
Jan Vervecken

Thanks for your reply Frank.
Frank Nimphius wrote:
... So if this works as with how you change the ADFc exception handler, then its by a file with this name in the application META-INF/service folder (the latter doesn't exist by default). ...The documentation section "22.5.3 How to Designate Custom Code as an Exception Handler "
at http://docs.oracle.com/cd/E35521_01/web.111230/e16182/taskflows_complex.htm#ADFFD22602
says directory path "application_root\.adf\META-INF\services".
... However, the default abstract class is DirtyPageHandler and this is in a public package. ...Sure, but (without documentation) it does not seem trivial to extend it and implement a custom implementation.
Reviewing some parts of the ADF framework source code suggest this API has some obscure aspects.
A DirtyPageContext seems to be passed between AdfcDirtyPageHandler and ControlFlowEngine via a request attribute.
adf_111230_6276_source.zip!\oracle\adfinternal\controller\application\AdfcDirtyPageHandler.java
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adf_111230_6276_source.zip!\oracle\adfinternal\controller\engine\ControlFlowEngine.java
   private boolean cancelNavigationCheck(AdfcContext adfcContext, ActivityId currentActivityId,
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   }Also a framework "adfinternal" RichPhaseListener has a rather explicit dependency on the DirtyPageContextImpl class because it is calling static methods on this implementation class.
adf_111230_6276_source.zip!\oracle\adfinternal\view\faces\context\RichPhaseListener.java
public void beforePhase(PhaseEvent event)
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}This suggests that no alternative implementation for DirtyPageContextImpl is possible.
But it seems to be the DirtyPageContextImpl class that is responsible for (part of) the "ui interaction", which seems to be what should change to prevent navigation on uncommitted data.
adf_111230_6276_source.zip!\oracle\adfinternal\view\faces\context\DirtyPageContextImpl.java
public void confirmNavigation(String confirmationToken)
    script.append("AdfPage.PAGE.confirmNavigation(\"");
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static boolean checkConfirmNavigationResponse()
    String param = external.getRequestParameterMap().get(_CONFIRMATION_RESPONSE_PARAM);
}So, a rather obscure API.
... Maybe worth filing an ER to get a public listener / hook into this instead of dealing with your own implementation. Will file one ...
... ER 16663793 ...Sounds like a good idea.
On My Oracle Support I have been able to find enhancement request 16663793, "PROVIDE HOOK INTO DIRTY PAGE WARNING FOR CUSTOMERS TO HANDLE W. CUSTOM DIALOG" (after requesting it to be published in service request 3-7073188791).
But, for the current version my question (q1) remains:
- (q1) What would be the preferred (and future proof) way to prevent navigation on uncommitted data (instead of just a warning)?
many thanks
Jan Vervecken

Preventive Maint Plan Pending List

How to display the Preventive Maint Plan Pending List with column having maint plan,maint plan description,planning grp,functional location,plan date.

Hello,
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Duarte:
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Message was edited by:
Ferry Lianto

Prevent navigation on pending error

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