About Action Form
Hi, suppose I have 2 actions which each has its own action form A1 will have F1 A2 will have F2 and we have JSP1, JSP2 and JSP3 it is like a 2 steps wizard, user first access JSP1 and when submit, A1 is executed and populate F1, it then forward to JSP2 user will select some data in JSP2 and when submit, A2 is executed and populate F2 The question is the data need to populate F2 is determined by what user select on F1, but only one action form can be associated to action. How do A2 know what user has selected?? any help will be appreciated - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: About Action Form
The answer can be determined by thinking it through. Start with where the data is and where it goes. You do not say if data prepopulates a form, so I will assume it does not. JSP1 has some data which is submitted and shows up in F1 and maybe A1. Right? There it is. Your data. All of it and that is it. If the foward to JSP2 does not somehow save that data, then the data will be gone. So, if you need it, you need to save it somehow. There are lots of ways to do that. So, you get to JSP2 and either have data saved or not. If not, not. Is so, so. This is exactly all there is to it in an important way. When JSP2 is submitted the data is sent to F2 and maybe A2. If JSP2 did not save any previous data in the response object, and nothing else did too. All the data left, as we reach good old A2 which forwards to JSP3. Now if no data from A2 is saved, old JSP3 doesn't get any. That's all there is to it. Michael Koon Yue Lam wrote: Hi, suppose I have 2 actions which each has its own action form A1 will have F1 A2 will have F2 and we have JSP1, JSP2 and JSP3 it is like a 2 steps wizard, user first access JSP1 and when submit, A1 is executed and populate F1, it then forward to JSP2 user will select some data in JSP2 and when submit, A2 is executed and populate F2 The question is the data need to populate F2 is determined by what user select on F1, but only one action form can be associated to action. How do A2 know what user has selected?? any help will be appreciated - 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: About Action Form
oh, so I need some way to store data in the respond object I know session can be help, is it a right way to do? It is not very big object but it would be an array of String (which contains user's multiple selection) thanks for your help, ^^ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: About Action Form
Session is probably the way to go. For things like this, i.e., data that is transient on the whole but needs to persists across a number of requests, session is probably the right choice. Why WOULDN'T it be the right choice? If your storing a lot of data, session can become a problem, especially if you might deploy to a distributed environment. Second, if you expect a very large number of requests, you may find server resources being chewed up more than you'd like and performance might ultimately suffer. Also, if you need the capability of saving the steps of the wizard for later, you'll need a more permanent persistence mechanism. These are just some of the concerns. All that being said, from what you describe, I'm thinking session without hesitation. Not much data, your entire process takes a couple of steps then some final result (which may be more permanently persisted, I don't know)... Session coding will be very easy, and unless your going to have a huge load, there shouldn't be any problem. Only you know all the details though, so you'll have to make the real determination. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com Koon Yue Lam wrote: oh, so I need some way to store data in the respond object I know session can be help, is it a right way to do? It is not very big object but it would be an array of String (which contains user's multiple selection) thanks for your help, ^^ - 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: logic:iterate and table display
Can you tell how to use EL code.
Am kind of newbie to Struts and and not much aware of EL tags.
But my containier is only JSP 1.2
Also I am using struts 1.1
-Original Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 16, 2004 7:57 PM
To: Struts Users Mailing List
Subject: Re: logic:iterate and table display
Vijay Vishvas Dharap wrote the following on 10/15/2004 9:41 PM:
Hi all,
I have following scenario..
I have FormBean which has getter and setter for my VO object
In VO I have a list of another VO.
Now on this form I want to display the contents of the list using
logic.iterate tags.
I will make matter simpler saying...
aFormBean has aVO which as list of bVO. bVO has attributes like xAttr,
yAttr, zAttr.
now aForm should show on the page table where contents of list of bVO
will be giving one one row of the table.
You can do this with struts logic and bean:write,I'm used to JSTL so
here it is...
c:forEach items=${yourFormName.aVo.bVOlist} var=bVOitem
c:out value='${bVOitem.xAttr}'/
%-- or JSP2.0 just ${bVOitem.xAttr} --%
c:out value='${bVOitem.yAttr}'/
/c:forEach
with logic iterate within your html:form tags (I 'think' this is
right?)
//use the EL struts tags if not using JSP2.0 Container
logic:iterate property=aVo.bVOlist id=bVOitem
bean:write name=bVOitem property=xAttr/
bean:write name=bVOitem property=yAttr/
/logic:iterate
Obviously you would surround the above with table tags etc. Or you could
also use the display tag (search google or archives) that will do this
for you.
--
Rick
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Re: About Action Form
Frank is definitely right. You will have to decide. You can store data in a database too. If you have a situation where the data is particularly session oriented, then storing in the session makes sense. However, remember the odd things that can happen with things like popups, frames, etc. I personally prefer to use an application level multithreaded program that does this stuff, relying on my own algorithms and not upon session management in the container. Frank W. Zammetti wrote: Session is probably the way to go. For things like this, i.e., data that is transient on the whole but needs to persists across a number of requests, session is probably the right choice. Why WOULDN'T it be the right choice? If your storing a lot of data, session can become a problem, especially if you might deploy to a distributed environment. Second, if you expect a very large number of requests, you may find server resources being chewed up more than you'd like and performance might ultimately suffer. Also, if you need the capability of saving the steps of the wizard for later, you'll need a more permanent persistence mechanism. These are just some of the concerns. All that being said, from what you describe, I'm thinking session without hesitation. Not much data, your entire process takes a couple of steps then some final result (which may be more permanently persisted, I don't know)... Session coding will be very easy, and unless your going to have a huge load, there shouldn't be any problem. Only you know all the details though, so you'll have to make the real determination. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Exposing ActionForm and MVC fields
Well, i actually end up doing the update only on the required fields on my ejb layer. This way, i don't need to worry about the exposure of the ActionForm fields. --- Freddy Villalba A. [EMAIL PROTECTED] escreveu: Hi, I believe you shouldn't abuse neither from the MVC pattern or the Struts' framework. All the issues regarding buyer's actions as well as seller's are part of an specific area: workflow management. Implement a basic WF Management subsystem (or integrate one into your application), define the roles (buyer / seller / whatever...), the actions (along with the corresponding pre- and post-), the nodes, etc... and yes, have your presentation layer (Struts) integrate with it. I know it's not simple or cheap... yet, I'm almost convinced that, at the end, it would've been a good investment for you and your project. Save yourself from trying to convert Struts into an all-mighty-god-who-knows-and-solves-everything tool. For me, that's the bottom-line for all these issues. Again, just my oppinion. HTH. Cheers, Freddy. -Mensaje original- De: David Suarez [mailto:[EMAIL PROTECTED] Enviado el: viernes, 15 de octubre de 2004 17:06 Para: [EMAIL PROTECTED]; Struts Users Mailing List Asunto: RE: Exposing ActionForm and MVC fields How about creating a hash/digest when you send the page down with your read-only fields and save it to session/hidden (you know the +/-), then compare it on the re-submit to see if any of the values have changed. If so, throw SecurityException or something similar? Would that work for you...djsuarez -Original Message- From: Lee Harrington [mailto:[EMAIL PROTECTED] Sent: Friday, October 15, 2004 8:52 AM To: Struts Users Mailing List Subject: Re: Exposing ActionForm and MVC fields In this case, i`m still suceptible to be hacked by javascript, because of the ActionForm fields exposure. What about that??? Different actions. I'd reccomend a dispatch action class...with different methods depending on whether the buyer or seller submitted. That way, in the seller method, even if they did hack the submit form you action would not be doing anything with those fields. Lee - 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] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Help ! Question regarding Action and Form Bean!
Hi,all, My action is triggered in one jsp file, and will end up in another JSP file, both have a form bean inside. And the action has to deal with both form beans. Question: How can I associate both form bean to one action? Thanks in advance! Tong __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Help ! Question regarding Action and Form Bean!
It would help if you described this in more detail. I hope this explains it for you. If you have a JSP that submits a form using html:form, you have to have that action associated to that form, otherwise you will get an exception when that JSP is loaded. If you have a JSP that wants to display data in a form bean (or any other bean really) but doesn't need to submit it to an action, you don't need to do anything special. You can generate the data your action and pass it to the JSP using request.setAttribute(String, Object). Your JSP just needs to refer to it by the name you passed into it. I often use formBeans for this purpose just because DynaBeans are easy to define, and with Hubert Rabago's FormDef plugin, it's pretty trivial to get DynaForm beans instantiated and populated with exactly what I need on the display side. -Original Message- From: t t [mailto:[EMAIL PROTECTED] Sent: Saturday, October 16, 2004 7:36 PM To: [EMAIL PROTECTED] Subject: Help ! Question regarding Action and Form Bean! Hi,all, My action is triggered in one jsp file, and will end up in another JSP file, both have a form bean inside. And the action has to deal with both form beans. Question: How can I associate both form bean to one action? Thanks in advance! Tong __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 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]
Help ! Question regarding Action and Form Bean(in detail )!
Hi, Joe, Thank you for your answer.Let me describe it in detail. I have two jsp files, let me name them j1 and j2.j1 has form f1, and j2 f2. In f2, there is a checkbox. f1 triggers an action (a1) which will look at the data in f1 and end up in j2. Currently, I let a1 associate f1, and forward to another action a2, a2 associate with f2. But the server always says no getter mathod for the checkbox. But there is a getter method in form bean f2. Any help will be appreciated! tong --- Joe Hertz [EMAIL PROTECTED] wrote: It would help if you described this in more detail. I hope this explains it for you. If you have a JSP that submits a form using html:form, you have to have that action associated to that form, otherwise you will get an exception when that JSP is loaded. If you have a JSP that wants to display data in a form bean (or any other bean really) but doesn't need to submit it to an action, you don't need to do anything special. You can generate the data your action and pass it to the JSP using request.setAttribute(String, Object). Your JSP just needs to refer to it by the name you passed into it. I often use formBeans for this purpose just because DynaBeans are easy to define, and with Hubert Rabago's FormDef plugin, it's pretty trivial to get DynaForm beans instantiated and populated with exactly what I need on the display side. -Original Message- From: t t [mailto:[EMAIL PROTECTED] Sent: Saturday, October 16, 2004 7:36 PM To: [EMAIL PROTECTED] Subject: Help ! Question regarding Action and Form Bean! Hi,all, My action is triggered in one jsp file, and will end up in another JSP file, both have a form bean inside. And the action has to deal with both form beans. Question: How can I associate both form bean to one action? Thanks in advance! Tong __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 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] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: logic:iterate and table display
Unfortunately, the Struts documentation isn't much help this department
(unless I'm missing something), except that I think it tells you which
Struts tags *don't* support the EL.
But this page ought to help:
http://java.sun.com/webservices/docs/1.0/tutorial/doc/JSTL4.html
There is also a blurb about using the EL in the Struts FAQ entry on
indexed properties.
If you look in your Struts distribution, you'll see the EL-related stuff
in the contrib directory. You use the Struts EL tags the same way as you
use the regular Struts tags (except you use the EL instead of using the
old-fashioned runtime expression language).
For example:
bean-el:size collection=${someBean.someCollection} id=numItems/
This Struts tag assumes there is a bean called someBean which exposes
a collection via the no-arg method getSomeCollection. It makes the
size of the collection available via the numItems variable, which can
be used subsequently like this, for example:
c:when test=${numItems 0}/
There may be more efficient ways to do the same thing, but this gives
you an example of a Struts tag and a JSTL tag that each use the EL.
I recommend the book JSTL by Sue Spielman (Morgan Kaufmann,
0-12-656755-7). It's only $20 new and worth it. It discusses the JSTL
tags and the EL in depth and is based on example. I have found that
using a combination of the Struts tags and JSTL tags made my JSPs the
nicest, but I think there's not much the Struts tags do that the JSTL
tags can't do.
Hope that helps,
Erik
Vijay Vishvas Dharap wrote:
Can you tell how to use EL code.
Am kind of newbie to Struts and and not much aware of EL tags.
But my containier is only JSP 1.2
Also I am using struts 1.1
-Original Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: Saturday, October 16, 2004 7:57 PM
To: Struts Users Mailing List
Subject: Re: logic:iterate and table display
Vijay Vishvas Dharap wrote the following on 10/15/2004 9:41 PM:
Hi all,
I have following scenario..
I have FormBean which has getter and setter for my VO object
In VO I have a list of another VO.
Now on this form I want to display the contents of the list using
logic.iterate tags.
I will make matter simpler saying...
aFormBean has aVO which as list of bVO. bVO has attributes like xAttr,
yAttr, zAttr.
now aForm should show on the page table where contents of list of bVO
will be giving one one row of the table.
You can do this with struts logic and bean:write,I'm used to JSTL so
here it is...
c:forEach items=${yourFormName.aVo.bVOlist} var=bVOitem
c:out value='${bVOitem.xAttr}'/
%-- or JSP2.0 just ${bVOitem.xAttr} --%
c:out value='${bVOitem.yAttr}'/
/c:forEach
with logic iterate within your html:form tags (I 'think' this is
right?)
//use the EL struts tags if not using JSP2.0 Container
logic:iterate property=aVo.bVOlist id=bVOitem
bean:write name=bVOitem property=xAttr/
bean:write name=bVOitem property=yAttr/
/logic:iterate
Obviously you would surround the above with table tags etc. Or you could
also use the display tag (search google or archives) that will do this
for you.
-
To unsubscribe, e-mail: [EMAIL PROTECTED]
For additional commands, e-mail: [EMAIL PROTECTED]
RE: Help ! Question regarding Action and Form Bean(in detail )!
What you want is for A1 to forward to J2. Not A2. J2 will display and then submit F2 to A2. Forwarding from one action to another is almost always bad (Okay, I admit that I've done it in some cases where I *know* the Action won't ever care about the request parameters. This clearly isn't one of those cases.) -Joe Hi, Joe, Thank you for your answer.Let me describe it in detail. I have two jsp files, let me name them j1 and j2.j1 has form f1, and j2 f2. In f2, there is a checkbox. f1 triggers an action (a1) which will look at the data in f1 and end up in j2. Currently, I let a1 associate f1, and forward to another action a2, a2 associate with f2. But the server always says no getter mathod for the checkbox. But there is a getter method in form bean f2. Any help will be appreciated! tong --- Joe Hertz [EMAIL PROTECTED] wrote: It would help if you described this in more detail. I hope this explains it for you. If you have a JSP that submits a form using html:form, you have to have that action associated to that form, otherwise you will get an exception when that JSP is loaded. If you have a JSP that wants to display data in a form bean (or any other bean really) but doesn't need to submit it to an action, you don't need to do anything special. You can generate the data your action and pass it to the JSP using request.setAttribute(String, Object). Your JSP just needs to refer to it by the name you passed into it. I often use formBeans for this purpose just because DynaBeans are easy to define, and with Hubert Rabago's FormDef plugin, it's pretty trivial to get DynaForm beans instantiated and populated with exactly what I need on the display side. -Original Message- From: t t [mailto:[EMAIL PROTECTED] Sent: Saturday, October 16, 2004 7:36 PM To: [EMAIL PROTECTED] Subject: Help ! Question regarding Action and Form Bean! Hi,all, My action is triggered in one jsp file, and will end up in another JSP file, both have a form bean inside. And the action has to deal with both form beans. Question: How can I associate both form bean to one action? Thanks in advance! Tong __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 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] __ Do You Yahoo!? Tired of spam? Yahoo! Mail has the best spam protection around http://mail.yahoo.com - 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]
Where is the html:label tag???
Hi, what is the reason for not having a html:label tag? Leandro. ___ Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador agora! http://br.acesso.yahoo.com/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Where is the html:label tag???
'Cause nobody ever thought about it and proposed it? :-) Actually, I'm not sure how much value add there would really be, since you can already do things like: label for=...bean:message ...//label to create a localized field label. Craig On Sat, 16 Oct 2004 16:44:41 -0300 (ART), Leandro Melo [EMAIL PROTECTED] wrote: Hi, what is the reason for not having a html:label tag? Leandro. ___ Yahoo! Acesso Grátis - Internet rápida e grátis. Instale o discador agora! http://br.acesso.yahoo.com/ - 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]
