Errors / Messages
In validate, if you add an error to the message list, validator returns without forwarding. Has anyone done anything with an alternate message file or prioritized messages, so you can add a message yet still forward. Thanks in advance. Edgar - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Errors / Messages
Edgar, What is your aim in doing this? If there is a validation error, the Struts framework sends the user back to the input page to inform them of the problem, and possibly allow them to fix it and resubmit. If the request still gets passed to the action, the action will need to do conditional processing based on the presence of errors, and then it is unclear how control will pass back to Struts so that it can send the user back to the input page to inform them of what went wrong. I have sometimes thought about having the action produce a validation-style error if something goes wrong in processing the request, after which it could pass control back to the Struts framework to send the user back to the input page. You can of course add another or something, but it would be nice if you could just tell Struts more cleary that something went wrong and that Struts should send the user back to the input form (as it does with a validation error), but I am not sure if there is an elegant way to do that. This is distinct from your proposed flow, but it seems the same feature (tell Struts there was an error and user should be sent back to input form) could support both of our scenarios. What is the scenario you wish to support with the control flow that are looking for? -Max - Original Message - From: "Edgar P Dollin" <[EMAIL PROTECTED]> To: "Struts Users Mailing List" <[EMAIL PROTECTED]> Sent: Monday, September 15, 2003 2:54 AM Subject: Errors / Messages > In validate, if you add an error to the message list, validator returns > without forwarding. Has anyone done anything with an alternate message file > or prioritized messages, so you can add a message yet still forward. > > Thanks in advance. > > Edgar > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Errors / Messages
I would like the action to perform (not fail as validator specifies) but give feedback to the user about the entered data. For example in certain fields you can use a table as a select but override the selection, and other input would be added to the selection. You would want to let the user know that the information was added to the allowed list. I am doing your other selection in the action class as well. My intermeditate solution, is to extend the ActionForm and add an informational message ActionMessages property and a special tag for displaying any pending informational messages. Edgar > -Original Message- > From: Max Cooper [mailto:[EMAIL PROTECTED] > Sent: Monday, September 15, 2003 5:38 AM > To: Struts Users Mailing List > Subject: Re: Errors / Messages > > > Edgar, > > What is your aim in doing this? If there is a validation > error, the Struts framework sends the user back to the input > page to inform them of the problem, and possibly allow them > to fix it and resubmit. If the request still gets passed to > the action, the action will need to do conditional processing > based on the presence of errors, and then it is unclear how > control will pass back to Struts so that it can send the user > back to the input page to inform them of what went wrong. > > I have sometimes thought about having the action produce a > validation-style error if something goes wrong in processing > the request, after which it could pass control back to the > Struts framework to send the user back to the input page. You > can of course add another or something, but it > would be nice if you could just tell Struts more cleary that > something went wrong and that Struts should send the user > back to the input form (as it does with a validation error), > but I am not sure if there is an elegant way to do that. This > is distinct from your proposed flow, but it seems the same > feature (tell Struts there was an error and user should be > sent back to input form) could support both of our scenarios. > > What is the scenario you wish to support with the control > flow that are looking for? > > -Max > > - Original Message - > From: "Edgar P Dollin" <[EMAIL PROTECTED]> > To: "Struts Users Mailing List" <[EMAIL PROTECTED]> > Sent: Monday, September 15, 2003 2:54 AM > Subject: Errors / Messages > > > > In validate, if you add an error to the message list, validator > > returns without forwarding. Has anyone done anything with an > > alternate message > file > > or prioritized messages, so you can add a message yet still forward. > > > > Thanks in advance. > > > > Edgar > > > > > - > > To unsubscribe, e-mail: [EMAIL PROTECTED] > > For additional commands, e-mail: [EMAIL PROTECTED] > > > > > > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Errors/Messages on Redirect
Has anyone else run into this scenario before? I've searched the archives and couldn't find much on the topic of errors and redirect. During an action, I want may encounter an error condition and I want to REDIRECT the user back to the page where they came from and pass along the error. I need to do a redirect to get the URL of the browser to reflect the page where they came from (in case they bookmark the link). If I don't do a redirect then the page being displayed reflects the action they were trying to perform and they are out of synch. The problem with this is that I can't pass the ActionErrors / ActionMessages on the request as they are lost with the redirect. One option I've thought of is to put the data on the session and then strip it off in the jsp--each request in a session would need to put data in via a unique key that's not in the session (in the event of simultaneous requests). - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Errors/Messages on Redirect
Brian, I had the same problem. I did the following: 1) save the errors in the session instead of the request 2) wrote a method that takes the messages from the session, and puts it into the request. I call that after my redirect is done. I thought about having the .jsp pull it out of the session and display it, but I was concerned about that being fragile if the user's control flow somehow didn't lead to the message display page. So instead, I do it in my controller (we're using tiles, too, so I have more than 1 action being called for every page). I'd be interested in hearing what approach you took to solving this problem. cheers, -- Cody Sherr Software Engineer Covalent Technologies, Inc. On Fri, 2003-03-28 at 10:47, Brian K Bonner wrote: > Has anyone else run into this scenario before? I've searched the archives > and couldn't find much on the topic of errors and redirect. > > During an action, I want may encounter an error condition and I want to > REDIRECT the user back to the page where they came from and pass along the > error. I need to do a redirect to get the URL of the browser to reflect > the page where they came from (in case they bookmark the link). If I > don't do a redirect then the page being displayed reflects the action they > were trying to perform and they are out of synch. > > The problem with this is that I can't pass the ActionErrors / > ActionMessages on the request as they are lost with the redirect. > > One option I've thought of is to put the data on the session and then > strip it off in the jsp--each request in a session would need to put data > in via a unique key that's not in the session (in the event of > simultaneous requests). > > - > To unsubscribe, e-mail: [EMAIL PROTECTED] > For additional commands, e-mail: [EMAIL PROTECTED] > > - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
NPE problem when using both errors/messages tag.
I'm getting an NPE in the generated JSP/Java whenever I try to display both
an errors and messages queue on a JSP page.
I image it is something pretty embarrasingly simple, but I've been after it
for over a day. Thanks in advance
Here's the NPE:
java.lang.NullPointerException
at java.util.Hashtable.put(Hashtable.java:389)
at
org.apache.jasper.runtime.PageContextImpl.setAttribute(PageContextImpl.java:
229)
at
org.apache.struts.taglib.html.MessagesTag.doStartTag(MessagesTag.java:250)
at org.apache.jsp.ContactUs$jsp._jspService(ContactUs$jsp.java:873)
...
The generated JSP Java code fragment is:
...
try {
int _jspx_eval_html_messages_1 = _jspx_th_html_messages_1.doStartTag();
if (_jspx_eval_html_messages_1 !=
javax.servlet.jsp.tagext.Tag.SKIP_BODY) {, like
...
Here are the tags in my page (its the second "
My action does a save on both the ActionErrors and ActionMessages objects,
though only one should actually end up with a message in it.
...
messages.add(
ActionMessages.GLOBAL_MESSAGE,
new ActionMessage("msg.email.sent"));
System.err.println("... Retrieved all fields from form");
} catch (Exception e) {
System.err.println("Error trying to send email");
success = false;
errors.add(
ActionMessages.GLOBAL_MESSAGE,
new ActionError("error.email.not.sent"));
throw e;
} finally {
System.err.println("... Finished one way or the other.");
saveMessages(request,messages);
saveErrors(request,errors);
}
...
Thanks again for any ideas -
Richard Mixon
email: [EMAIL PROTECTED]
-
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