Does html:base/ affect html:form action=... ?
Am I doing something wrong? I have %@ taglib uri=/WEB-INF/struts-html.tld prefix=html % in my page, I have html:html tag, and I have html:form. I would like to use relative address for a action mapping, by using html:base/ in the head, but looks like it does not work. Struts 1.2.4 (? I guess) Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Validating indexed properties using struts
Hi, Can some one give me some sample on how to validate the indexed properties in Struts 1.1 Thanks Ashwani This message contains information that may be privileged or confidential and is the property of the Capgemini Group. It is intended only for the person to whom it is addressed. If you are not the intended recipient, you are not authorized to read, print, retain, copy, disseminate, distribute, or use this message or any part thereof. If you receive this message in error, please notify the sender immediately and delete all copies of this message.
RE: 1.3.x in production (was Re: Showing a PDF inside a JSP)
Aha! StrutsWS 1.3 that I have uploaded in sourceforge cvs (strutsws project) was In fact using Struts 1.3 with customization of RequestProcessor Am I the winner :)) ? Regards marco -Original Message- From: Frank W. Zammetti [mailto:[EMAIL PROTECTED] Sent: 04 August 2005 04:12 To: Struts Users Mailing List Subject: Re: 1.3.x in production (was Re: Showing a PDF inside a JSP) Well, now I'm going to have to go update my blog to 1.3 just to beat you both :) (Nah, doesn't even REMOTELY count as a production app, I know! :) ) Frank Wendy Smoak wrote: From: Joe Germuska [EMAIL PROTECTED] ... my most recent app (which may make history this weekend as the first Struts 1.3.x based webapp to go into production? ;-) ) You'll beat me by a few days, then. ;) I have one out in test that I had originally planned to leave at 1.2.7... but what fun would that be? -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.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]
Re: validator question
Le Mardi 2 Août 2005 20:14, Dewitte Rémi a écrit :
Hi !
In a wizard, I have some required checks with struts-validator assigned
to pages (with page=).
There is sometimes a jump in the wizard so that a property is null. When
validating the page after the jump, the server-side validation failed as if
validator checked all previous pages.
For example,
page1 - property q1
page2 - property q2
page3 - property q3
If i jump from page1 to page3, submitting page3 will failed telling q2 is
required (because null).
Can you confirm that the validator ckecks all properties for pages =
current page ?
Answer to myself : yes
From validator src :
/**
* Gets the page. This in conjunction with the page property of
* a codeFieldcode can control the processing of fields. If the
field's
* page is less than or equal to this page value, it will be processed.
*/
public int getPage() {
return page;
}
Thanks.
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RE: action executing two times
I had the same problem with my action executing twice and I tracked the problem in the struts-config file. When an action is of type X and a second completely different action is of the same type X then the problem occurs... Check your config file for actions that share the same type... Cheers, Fotis -Original Message- From: Jeremiah Johnson [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 03, 2005 6:03 PM To: Struts Users Mailing List Subject: Re: action executing two times I think this has me on the right track. I was using firefox. I tried this with ie and it works fine. I'm clicking on a link that is an html:link to cause this. If I type the url the same thing happens. There is javascript code that submits the page by clicking on a link but it's not tied to the link I am clicking. there are some links where href=# but they are not created by struts tags. How does src=# trigger another submit? I'm going to start taking html out of the page till I figure out which piece causes this. I post back if I find anything interesting. Thanks! /Jeremiah Laurie Harper wrote: Jeremiah Johnson wrote: I have an action mapping that looks like: action attribute=someForm name=someForm path=/my/path scope=request validate=false parameter=cmd type=someAction forward name=showForm path=myTileDefinition/ /action If I click the link to /my/path.do my action class sends out the showForm then displays myTileDef. Then it executes the same action class again. The second execution doesn't copy some of the information from the first execution. My action class is a LookupDispatchAction so on the second time it errors out because cmd is not defined as a parameter. If I point my action at a regular jsp page with a tile definition in the page it does the same thing. If I point the action at a plain old jsp page it executes once. Why does this execute more then once? how do I write code around this problem? I'm using struts 1.2.7. Thanks! /Jeremiah How are you invoking the action (from an HTML link? form submission? directly by typing the URL into the address bar?); is there any Javascript involved? Does the response contain any suspect hrefs (for example img/ tags with src=#) that might be triggering the second request? Using something like tcpflow to watch what's going over the wire can help figure out where your 'mystery' request is coming from. If that doesn't help, I'd suggest posting any HTML that invokes the action as well as the HTML it produces as a resonse. L. - 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: Html:link with DynaActionForm
I have dine something similar that works. I configure an action in the struts config file that defines the formbean to use. Then the onclick method of the link uses javascript to fill in the form and then calls document.getElementById(myForm).submit() ; The form bean arrives filled and ready to the correct action Fotis -Original Message- From: Woodchuck [mailto:[EMAIL PROTECTED] Sent: Wednesday, August 03, 2005 9:16 PM To: Struts Users Mailing List; [EMAIL PROTECTED]; [EMAIL PROTECTED] Subject: Re: Html:link with DynaActionForm hihi, clicking on links (even on a page with a form) does *not* submit the form at all. do not confuse this with the common input type='submit' or using javascript to submit forms via document.forms[0].submit(). when you click on a link such as a href=http://www.mywebsite.com/myAction.do;Click this link!/a no extra information is submitted to that Action even if there's an associated ActionForm. if you want to populate the ActionForm associated to the Action that is to be 'triggered' from a link you can use query string parameters. not very elegant but it works, and not recommended if you have a lot of info to populate. using this method your final renedered link should look something like this: a href=http://www.mywebsite.com/myAction.do?personId='12345'firstName='J ohn'lastName='Smith'Click this link!/a how you create this link is another matter but when you click the above link an attempt to populate personId, firstName, lastName values into the corresponding ActionForm for myAction will be made (using the JavaBean convention). hth, woodchuck --- Amol Yadwadkar [EMAIL PROTECTED] wrote: Hi List, I have a form where all the action are provided by link. I am using DynaActionform so when I click on html:link I do not get the Dynaform populated for the next page But If I use use html:submit then it happens as expected. Can any one have solution for the above issue. Thankx best regds, AMOL - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs - 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: checkbox initially checked?
Hi , As Wendy has mentioned- Otherwise, the place to do this is in your Action, before you forward to the JSP. I am interested in populating Form before loading jsp page so that I can assign values to HTML comtrols. HOw to do that? On 8/4/05, Wendy Smoak [EMAIL PROTECTED] wrote: From: Chris Decker [EMAIL PROTECTED] New to struts so sorry for the simple questions. I have a html: checkbox struts tag and I want to have the checkbox checked initially similar to the checked attribute in a traditional INPUT statement. Can you do this? I've looked everywhere! If it's a dynamic form, you can set a default value in struts-config.xml: form-bean name=contactForm type=edu.example.ContactForm form-property name=onHoldFlag type=java.lang.Boolean initial=true/ /form-bean Otherwise, the place to do this is in your Action, before you forward to the JSP. You only need to set the default the first time the form is displayed. Exactly where and how depends on how you've written the app-- do you have a 'setup' action that's separate from the one that handles form submission? The reset method is not the place to set defaults. In fact, you will need to set that checkbox to false/off in the form's reset method. If you don't, you will find that there is no way for the user to to un-check it. A couple of checkbox links from the FAQ: http://struts.apache.org/faqs/newbie.html#checkbox http://struts.apache.org/faqs/newbie.html#reset -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
Craig McClanahan on 03/08/05 23:10, wrote: I just uploaded the slides from my OSCON talk this afternoon, comparing several web frameworks on how they implement six major architectural features. Several people have asked for them, so here's a link: http://people.apache.org/~craigmcc/oscon_2005_web_architectures.pdf Can I summarise in a slightly Friday manner :) (1) Struts: v1.3 should be better, in fact there are at least 5 major points that need addressing (2) Webwork: kind of weird, has Actions but has unknowns like XWork, interceptor stacks, OGNL (3) Spring MVC: totally flexible, configurable, wide variety of implementations - everything to everybody. Sounds like it can make coffee too. Good if you love XML config files. (4) Tapestry: even weirder than Webwork, and you don't get to use JSPs, you have to write your HTML like ColdFusion (5) JSF: obviously the dog's gonads - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Pass errors to tile for popup
Is the only solution a tiles controller?
Ok, I gotta go to my day job. I'll check in this afternoon.
Thanx.
From: draegoon Z [EMAIL PROTECTED]
Reply-To: Struts Users Mailing List user@struts.apache.org
To: user@struts.apache.org
Subject: RE: Pass errors to tile for popup
Date: Thu, 04 Aug 2005 00:15:07 +
I tried this, but got a null error at the end of the tile:insert:
logic:messagesPresent
%-- Need to show error popup --%
tiles:insert definition=tile.error_box.insert flush=false
%-- define putList dynamically --%
tiles:putList name=errors
%-- iterate through error messages --%
html:messages id=error
%-- add error to the list --%
tiles:add value=${error} direct=true /
/html:messages
/tiles:putList
/tiles:insert
/logic:messagesPresent
I could see the value of ${error}, so I'm definitely reading the errors.
Can this not be done with tiles like this?
Later
From: draegoon Z [EMAIL PROTECTED]
Reply-To: Struts Users Mailing List user@struts.apache.org
To: struts-user@jakarta.apache.org
Subject: Pass errors to tile for popup
Date: Wed, 03 Aug 2005 19:21:36 +
I need some code snippets please:
I'm trying to have a page popup a window that will display all the errors
in the first page.
For cleanliness purposes, and modularity, I will use a tile to insert
this code.
I will do this either by putting the errors in the session, or by getting
them from a dynamically built putList.
So how do I actually access each error in the page (maybe iterate
through), so that I can build my putList or put them in the session.
Thanx :)
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Re: Validating indexed properties using struts
On 04/08/05, Kalra, Ashwani [EMAIL PROTECTED] wrote: Hi, Can some one give me some sample on how to validate the indexed properties in Struts 1.1 I assume you are using the default Validator plugin. This is an excerpt from my validation.xml, using indexed properties. form name=/myForm field property=gradeCurrentMonth indexedListProperty=jobs depends=integer arg0 key=absence.label.scale/ /field field property=amountCurrentMonth indexedListProperty=jobs depends=integer arg0 key=absence.label.amount/ /field /form - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
Sorry but: what's the meaning of dog's gonads? :P 2005/8/4, Adam Hardy [EMAIL PROTECTED]: Craig McClanahan on 03/08/05 23:10, wrote: I just uploaded the slides from my OSCON talk this afternoon, comparing several web frameworks on how they implement six major architectural features. Several people have asked for them, so here's a link: http://people.apache.org/~craigmcc/oscon_2005_web_architectures.pdf Can I summarise in a slightly Friday manner :) (1) Struts: v1.3 should be better, in fact there are at least 5 major points that need addressing (2) Webwork: kind of weird, has Actions but has unknowns like XWork, interceptor stacks, OGNL (3) Spring MVC: totally flexible, configurable, wide variety of implementations - everything to everybody. Sounds like it can make coffee too. Good if you love XML config files. (4) Tapestry: even weirder than Webwork, and you don't get to use JSPs, you have to write your HTML like ColdFusion (5) JSF: obviously the dog's gonads - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- M4RC0 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
M4RC0 on 04/08/05 11:54, wrote: Sorry but: what's the meaning of dog's gonads? :P You can look up 'gonad' in any medical dictionary, but as for the phrase I based it on, try this: http://www.phrases.org.uk/meanings/114500.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
so if i'm right... the entire phrase should mean: JSF: obviously the dog's testicles mmm ... i'm still confused :P I mean, i'd like to know an opinion about JSF compared to other frameworks, but also the english class is appreciated too :P tnx 2005/8/4, Adam Hardy [EMAIL PROTECTED]: M4RC0 on 04/08/05 11:54, wrote: Sorry but: what's the meaning of dog's gonads? :P You can look up 'gonad' in any medical dictionary, but as for the phrase I based it on, try this: http://www.phrases.org.uk/meanings/114500.html - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- M4RC0 - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
Well you're all primed to understand the explanation given at that link then! Check it out, or have you no web access? M4RC0 on 04/08/05 12:37, wrote: so if i'm right... the entire phrase should mean: JSF: obviously the dog's testicles mmm ... i'm still confused :P I mean, i'd like to know an opinion about JSF compared to other frameworks, but also the english class is appreciated too :P tnx 2005/8/4, Adam Hardy [EMAIL PROTECTED]: M4RC0 on 04/08/05 11:54, wrote: Sorry but: what's the meaning of dog's gonads? :P You can look up 'gonad' in any medical dictionary, but as for the phrase I based it on, try this: http://www.phrases.org.uk/meanings/114500.html - 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]
java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm
Hi I am working on a project and we are building an ear file that cosists of 2 jars and a war file. When deploying it on the Weblogic Server it reports no errors, but when requesting the url from the browser it reports the follwing error: java.lang.NoClassDefFoundError: org/apache/struts/action/ActionForm at java.lang.ClassLoader.defineClass0(Native Method) at java.lang.ClassLoader.defineClass(ClassLoader.java:539) at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:123) at weblogic.utils.classloaders.GenericClassLoader.findLocalClass(GenericClassLoader.java:480) at weblogic.utils.classloaders.GenericClassLoader.findClass(GenericClassLoader.java:182) at java.lang.ClassLoader.loadClass(ClassLoader.java:289) at java.lang.ClassLoader.loadClass(ClassLoader.java:282) at java.lang.ClassLoader.loadClass(ClassLoader.java:235) at weblogic.utils.classloaders.GenericClassLoader.loadClass(GenericClassLoader.java:224) at weblogic.utils.classloaders.ChangeAwareClassLoader.loadClass(ChangeAwareClassLoader.java:41) at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:302) at java.lang.Class.getDeclaredMethods0(Native Method) at java.lang.Class.privateGetDeclaredMethods(Class.java:1655) at java.lang.Class.getDeclaredMethods(Class.java:1139) at java.beans.Introspector$1.run(Introspector.java:1127) at java.security.AccessController.doPrivileged(Native Method) at java.beans.Introspector.getPublicDeclaredMethods(Introspector.java:1125) at java.beans.Introspector.getTargetMethodInfo(Introspector.java:990) I am sure I have the struts.jar in my WEB-INF/lib directory which is located in the war file and I don't now what is going on. Any suggestions would be appreciated. -- Regards, Petar!
Re: [OT] My O'Reilly Open Source Conference Talk
Ahem JSF is not a Framework, it is an implementation specification. Its not made by someone like Apache or Sun (But can be implemented by them to the specification or by another vendor, IBM etc). Struts is an application Framework, JSF is a user interface implementation. And I prefer the muts nuts. that must transalate accross to the boys on the other side of the atlantic. Original Message Follows From: Adam Hardy [EMAIL PROTECTED] Reply-To: Struts Users Mailing List user@struts.apache.org To: Struts Users Mailing List user@struts.apache.org Subject: Re: [OT] My O'Reilly Open Source Conference Talk Date: Thu, 04 Aug 2005 13:08:21 +0100 Well you're all primed to understand the explanation given at that link then! Check it out, or have you no web access? M4RC0 on 04/08/05 12:37, wrote: so if i'm right... the entire phrase should mean: JSF: obviously the dog's testicles mmm ... i'm still confused :P I mean, i'd like to know an opinion about JSF compared to other frameworks, but also the english class is appreciated too :P tnx 2005/8/4, Adam Hardy [EMAIL PROTECTED]: M4RC0 on 04/08/05 11:54, wrote: Sorry but: what's the meaning of dog's gonads? :P You can look up 'gonad' in any medical dictionary, but as for the phrase I based it on, try this: http://www.phrases.org.uk/meanings/114500.html - 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] - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Logon redirect - Construct ActionForward on the fly ?
Hi all, I have overridden the RequestsProcessor#processRoles() to check whether a user has sufficient Role to access an Action(an therefore a page). If he/she hasn't, it is easy. I dump the request URI to the session and redirect to a global forward (logon). That's all not so difficult..as the logon is a statically existing mapping.. The logon has a forward linking to the member's homepage and after the users logged in successfully, that's where they get forwarded to.. I would like to forward them to the stored URI (from the session), if they tried to access a specific location in the members area rather then logging in proactively. Any hints where to look to get enlightened? Rgds Aleiprecht PS: To all native English speakers . sorry . I'm German .all language mistakes exclusively C by myself ;) - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Logon redirect - Construct ActionForward on the fly ?
In your login jsp
logic:present name=mySavedUrl scope=session
html:hidden property=url value=%= session.getAttribute(mySavedUrl)
% /
/logic:present
In your login action...
String redirect = form.get(url); // providing your using a dyna type action
form
if ( redirect != null ) {
return new RedirectingActionForward( redirect );
}
return mapping.findForward(success);
Something like that should work
[EMAIL PROTECTED] wrote:
Hi all,
I have overridden the RequestsProcessor#processRoles() to check whether a
user has sufficient Role to access an Action(an therefore a page). If he/she
hasn't, it is easy. I dump the request URI to the session and redirect to a
global forward (logon). That's all not so difficult..as the logon is a
statically existing mapping..
The logon has a forward linking to the member's homepage and after the users
logged in successfully, that's where they get forwarded to..
I would like to forward them to the stored URI (from the session), if they
tried to access a specific location in the members area rather then logging
in proactively. Any hints where to look to get enlightened?
Rgds
Aleiprecht
PS: To all native English speakers . sorry . I'm German .all language
mistakes exclusively C by myself ;)
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RE: Logon redirect - Construct ActionForward on the fly ?
Please disregard ...
The solution was right in front of my eyes ;)
At the end of the logon action
if (getSessionAttribute(AFTERLOGON_DEST) != null) {
String tmpString = + getSessionAttribute (AFTERLOGON_DEST);
removeSessionAttribute(AFTERLOGON_DEST);
return (ActionForward) new RedirectingActionForward(tmpString);
} else {
return (mapping.findForward(logonsuccess));
}
The calls
getSessionAttribute(String key)
removeSessionAttribute(String key)
are just shortened for readability sake
rgds
albi
-Original Message-
From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED]
Sent: Thursday, August 04, 2005 3:01 PM
To: user@struts.apache.org
Subject: Logon redirect - Construct ActionForward on the fly ?
Hi all,
I have overridden the RequestsProcessor#processRoles() to check whether a
user has sufficient Role to access an Action(an therefore a page). If he/she
hasn't, it is easy. I dump the request URI to the session and redirect to a
global forward (logon). That's all not so difficult..as the logon is a
statically existing mapping..
The logon has a forward linking to the member's homepage and after the users
logged in successfully, that's where they get forwarded to..
I would like to forward them to the stored URI (from the session), if they
tried to access a specific location in the members area rather then logging
in proactively. Any hints where to look to get enlightened?
Rgds
Aleiprecht
PS: To all native English speakers . sorry . I'm German .all language
mistakes exclusively C by myself ;)
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RE: action executing two times
--- Chatzinikos, Fotis, VF-GR Consultant [EMAIL PROTECTED] wrote: I had the same problem with my action executing twice and I tracked the problem in the struts-config file. When an action is of type X and a second completely different action is of the same type X then the problem occurs... Check your config file for actions that share the same type... hihi, this is simply not true. only the path attribute is used to determine which action to execute. the type attribute has nothing to do with this. there is something else causing your action executing twice. it is *not* because you have multiple actions defined with the same type (action class). woodchuck Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: action executing two times
Only the path attribute 'should' be used. I will post the config tomorrow so you can have a look... Maybe I did something else wrong maybe there is a bug... I do not know. I will have another look before the post tomorrow, Cheers, Fotis -Original Message- From: Woodchuck [mailto:[EMAIL PROTECTED] Sent: Thursday, August 04, 2005 5:31 PM To: Struts Users Mailing List Subject: RE: action executing two times --- Chatzinikos, Fotis, VF-GR Consultant [EMAIL PROTECTED] wrote: I had the same problem with my action executing twice and I tracked the problem in the struts-config file. When an action is of type X and a second completely different action is of the same type X then the problem occurs... Check your config file for actions that share the same type... hihi, this is simply not true. only the path attribute is used to determine which action to execute. the type attribute has nothing to do with this. there is something else causing your action executing twice. it is *not* because you have multiple actions defined with the same type (action class). woodchuck Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs - 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: Showing a PDF inside a JSP
hihi,
i've also worked quite a bit with generating PDF documents (iText,
JasperReports via iReport) so i know Acrobat pains too. (yes Acrobat
is very moody, it works one day then not the next, and only for ppl it
likes) :)
i went to that website:
http://www.sos.state.co.us/biz
but couldn't find a working example of a PDF document displayed
embedded *within* an html page. that is, the Acrobat plugin window
occupying a sub portion of the entire displayed html page. is this not
what the original post was about? or did i simply not find the working
example on the website? (i went to the File a document section and
brought up the PDFs on the subsequent page but they all 'took over' the
entire browser window)
it would be awesome to see a PDF embedded in an html page without using
frames.
woodchuck
--- Frank W. Zammetti [EMAIL PROTECTED] wrote:
Cool, thanks!
At work I actually have a rather lengthy document listing all the
Acrobat issues I found along the way, and the solutions to it...
quite a
few... I'm going to add this to it as a miscellaneous note, just so I
don't forget for next time (and, oh, I *know* there's gonna be a next
time!)
Frank
Gary VanMatre wrote:
Really? You found that to be necassery? What specific problem does
it
solve (which of the MANY Acrobat problems I mean? :) ).
I belive that it had to do with the upgrade from the 5.x to 6.0.2
reader com controls. Version 6.0.2 would not run as an inprocess
server. It wanted to fire up an instance of reader instead of
imbeding in the document. The context type was the ticket. That's
about I'll I know about details. It's been about a year ago. I sat
next to the guy working on it (Mr. Bee).
Gary
I ask because I spent probably a month dealing with PDF generation
issues and I just last week managed to get everything working for
everyone (it was one of those it works for user A but not B, oh
wait,
it's tommorrow and now user B doesn't work but A does... and their
PCs
appear to be identical in every way). I never tried what you
suggest,
and it looks to be working perfectly now, so as someone who has
fought
the Acrobat battle too, I'm curious.
Frank
Gary VanMatre wrote:
Excellent! I wouldn't have thought that would work, based on how
screwed up the Acrobat plug-in generally is, but that's
excellent!
Well, I think there was better than a week spent one line of code,
actually
one char '\r'. You are not alone
response.setContentType(application/pdf\r);
Gary
Frank
[EMAIL PROTECTED] wrote:
I've also seen it done using the html embed tag. We used itext
to deliver a
fillable pdf. You can see it action here
(http://www.sos.state.co.us/biz).
type=application/pdf
public ActionForward loadBytesIntoStream(
ActionMapping mapping,
ActionForm form,
HttpServletRequest request,
HttpServletResponse response,
String filename,
byte[] bytes)
throws Exception {
response.setContentType(application/pdf\r);
response.setHeader(
Content-disposition,
inline; filename= + justFilename);
response.setContentLength(bytes.length);
response.setHeader(Expires, 0);
response.setHeader(
Cache-Control,
must-revalidate, post-check=0, pre-check=0);
response.setHeader(Pragma, public);
ServletOutputStream buff = response.getOutputStream();
buff.write(bytes, 0, bytes.length);
bytes = null;
buff.flush();
return null;
}
Gary
-- Original message --
iText just generates the PDF on the server-side, the display
issue on
the browser would still be the same because you are returning a
PDF
stream back (or redirecting to a temp file, either way) and the
browser
recognizes that and passes it to the plug-in for display (a
plug-in
which, by the way, is perhaps the buggiest piece of garbage
ever foisted
on an unsuspecting public!)
Frank
ziggler wrote:
you can use itext to realize?
2005/8/4, Frank W. Zammetti :
Hi Rafael,
The only way I can think of to actually embed a PDF, or at
least to
give that appearance, is to use iFrames.
The Acrobat plug-in takes over the entire window it is shown
in, which
when frames aren't involved is the entire client area of the
browser.
So, using frames should, in theory, work (I've never actually
tried to
do this, so there could be hidden gotchas). An iFrame would
allow you
more or less to seem to embed the PDF.
I'd be willing to bet there aren't any other ways to do it
that aren't
way more trouble than they're woth, if there are any at
all...
...now that THAT gauntlet is thrown down, let the flood of
messages
correcting me begin :)
Frank
Rafael Taboada wrote:
Hi Folks, I know my doubt is out Struts topic but I want to
use ur
xperiencie in my problem.
I want to show a report in PDF file inside a JSP, inside a
table for
Designs for Wizard workflow...
Hi all, I am converting Wizard workflow into Struts framework. Wizard page contains next,back,finish buttons. I am considering 2 approches.. 1) /PrepareStep1.do -- step1Form -- forward to step1.jsp step2.jsp on next --- ProcessStep1.do /ProcessStep1.do --step1Form --on success /PrepareStep2.do /PrepareStep2.do --step2Form -- on success forword to step2.jsp step2.jsp on next --- ProcessStep2.do on back --- PrepareStep3.do /ProcessStep2.do --step2Form -- /PrepareStep3.do PrepareStep1 will fill the form step1Form to render the jsp page step1.jsp . step1.jsp on submit forwrd to /ProcessStep1.do . /ProcessStep1.do on success forward to /PrepareStep3.do . and so one... Each ProcessAction will save the data from Form to Business object. 2) One common ActionForm (session scope) will be used be all actions. /PrepareStep1.do -- commonForm -- forward to step1.jsp -- /ProcessStep1AndPrepareStep2.do --- step2.jsp /ProcessStep2AndPrepareStep3.do I read somewhere that DispatchAction with common Form is suitable for Wizard workFlow applications. My wizarsd must support next,back. Which approch is better? on the following points 1 Extesion of wozard steps.(may be in between the old steps) 2 Maintenance Can any body tell me the advantage and disadvantage of both of these approach. Waiting for suggetion Thanks Regard Swapnil
Re: DTOs are evil
Michael Jouravlev wrote the following on 8/3/2005 9:07 PM: http://www.theserverside.com/news/thread.tss?thread_id=35233 Just curious what are Rod's exact views on the DTO? I searched for DTOs on that link you posted but only saw posts by other people. I do agree, though, with what others have said that DTOs/ValueObjects aren't really that OO. It's funny that the subject comes up because I was a late bloomer to the programming world (started about 6 years and was a waiter and science teacher before that:), and when I first started reading the Java books and then applying that to what I was reading/seeing in JSP projects I was on, the concepts did seem to conflict. What I mean is take the concept of an Employee. In almost all web applications you see the EmployeeDTO being passed to the DAO... employeeDAO.updateEmployee( employee ); From what I recall the real OO way would be... employee.update(); and employee takes care of updating itself. From an OO perspective I don't see a problem having an Employee object that has a DAO inside that takes care of persistence. I do have a couple questions though about OO design if this approach is used... 1) Where do you encapsulate getting Collections back of your objects? For example an Employee object has CRUD methods, but what about you when you need a List of Employees? Do you make an EmployeeList object that has methods getEmployees? Do you maybe just 'cheat' and add a getList or getEmployees method directly to the Employee object? 2) It also seems a bit heavy to return Collections of pretty heavy objects. (Each Employee since it's not a simple VO could be a large object - although by large I just mean having a bunch of methods in it etc - I'm not so sure it would be large footprint-wise if just the properties were being filled in the case of a list - so bottom line is maybe the extra stuff in the object doesn't matter much? Side note... 3) Even from an OO perspective, you always hear about encapsulating unique behaviors to make things reusable, so in a sense couldn't you consider the 'properties' of an Employee 'unique' or, if not the properties, the CRUD stuff is 'sort of' unique? If this is the case, you could make an argument for separating out the properties into another object (DTO/VO) separate? -- Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Designs for Wizard workflow...
Two years ago you would be on your own. Now you have a bunch of solutions: * Struts Workflow Extension: http://www.livinglogic.de/Struts/index.html * Struts Flow: http://struts.apache.org/flow/index.html * Spring Web Flow: http://struts.apache.org/flow/index.html * And my very own, WizardAction implementing Easy Wizard: http://struts.sourceforge.net/strutsdialogs/wizardaction.html Of course, I would prefer you to use my solution ;-) and I am here to help if you need. See the live demo here: http://www.superinterface.com/strutsdialog/wizardaction.do and a slightly different version here: http://www.superinterface.com/wizard/signupWizard.do I use DispatchAction flavor, like your second choice. But I've listed other flow engines for you too. Michael. On 8/4/05, Swapnil Patil [EMAIL PROTECTED] wrote: Hi all, I am converting Wizard workflow into Struts framework. Wizard page contains next,back,finish buttons. I am considering 2 approches.. 1) /PrepareStep1.do -- step1Form -- forward to step1.jsp step2.jsp on next --- ProcessStep1.do /ProcessStep1.do --step1Form --on success /PrepareStep2.do /PrepareStep2.do --step2Form -- on success forword to step2.jsp step2.jsp on next --- ProcessStep2.do on back --- PrepareStep3.do /ProcessStep2.do --step2Form -- /PrepareStep3.do PrepareStep1 will fill the form step1Form to render the jsp page step1.jsp . step1.jsp on submit forwrd to /ProcessStep1.do . /ProcessStep1.do on success forward to /PrepareStep3.do . and so one... Each ProcessAction will save the data from Form to Business object. 2) One common ActionForm (session scope) will be used be all actions. /PrepareStep1.do -- commonForm -- forward to step1.jsp -- /ProcessStep1AndPrepareStep2.do --- step2.jsp /ProcessStep2AndPrepareStep3.do I read somewhere that DispatchAction with common Form is suitable for Wizard workFlow applications. My wizarsd must support next,back. Which approch is better? on the following points 1 Extesion of wozard steps.(may be in between the old steps) 2 Maintenance Can any body tell me the advantage and disadvantage of both of these approach. Waiting for suggetion Thanks Regard Swapnil - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] My O'Reilly Open Source Conference Talk
On 8/4/05, Mark Benussi [EMAIL PROTECTED] wrote: Ahem JSF is not a Framework, it is an implementation specification. Its not made by someone like Apache or Sun (But can be implemented by them to the specification or by another vendor, IBM etc). Struts is an application Framework, JSF is a user interface implementation. JSF was supposed to be just a view layer, but now it is a framework on itself. Ok, there are two frameworks: Sun's and Apache's ;) And I prefer the muts nuts. that must transalate accross to the boys on the other side of the atlantic. Have you watched Formula 51? Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] wrong list I know, but lazy, Tomcat 5.5 question
Robert Taylor wrote the following on 8/3/2005 7:06 PM: Rick, I'm sure you already have, but just in case you haven't... http://jakarta.apache.org/tomcat/tomcat-5.5-doc/logging.html It provides a pretty detailed explaination of how to configure cross-context logging using either log4j or java.util.logging package. BTW, Tomcat 5.5 uses Commons Logging which I think defaults to java.util.logging if its found and no other logging configs are specified. Yea that was the problem. Thanks Robert. I actually didn't bother to read those docs because I was assuming a default cross-context log would be provided. Although I'm still a bit confused since I never ran into a stdout log that Tomcat 5.5 says it should produce for stack traces? (Unless by stdout log they mean the stdout to the console?): Tomcat 5.5 has done away with localhost_log which you may be familiar with as the runtime exception/stack trace log. These types of error are usually thrown by uncaught exceptions, but are still valuable to the developer. They can now be found in the stdout log. Not a big deal though since I'm back to using 5.0 because they changed the way the JNDI stuff is done in tomcat 5.5 and since I'm deploying eventually to tomcat 5 and not 5.5, I just went back to 5.0 locally as well. -- Rick - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Does html:base/ affect html:form action=... ?
Action mappings are not URLs. That is apples and oranges. Your action mapping is completely independent of anything to do with URLs and is a logical rather than physical based protocol. On 8/3/05, Michael Jouravlev [EMAIL PROTECTED] wrote: Am I doing something wrong? I have %@ taglib uri=/WEB-INF/struts-html.tld prefix=html % in my page, I have html:html tag, and I have html:form. I would like to use relative address for a action mapping, by using html:base/ in the head, but looks like it does not work. Struts 1.2.4 (? I guess) Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] -- You can lead a horse to water but you cannot make it float on its back. ~Dakota Jack~ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
html:link: url rewrite of href parameter still there?
Hi,
I recently move my web application from Struts 1.2.4 to 1.2.7.
Since this, the html:link tag doesn't behave as before because it doesn't
encode sessionid in url specified as href property when session cookies are
disable.
I compare TagUtils class source code between Struts 1.2.4 and 1.2.7 and
found that an extra condition have been added in computeURLWithCharEncoding
method to avoid url encoding of link with href property. See sample code
below.
In Struts 1.2.4
// Perform URL rewriting to include our session ID (if any)
if (pageContext.getSession() != null) {
HttpServletResponse response = (HttpServletResponse)
pageContext.getResponse();
if (redirect) {
return (response.encodeRedirectURL(url.toString()));
} else {
return (response.encodeURL(url.toString()));
}
} else {
return (url.toString());
}
and Struts 1.2.7
// Perform URL rewriting to include our session ID (if any)
// but only if url is not an external URL
if (( href == null ) ( pageContext.getSession() != null )) {
HttpServletResponse response = (HttpServletResponse)
pageContext.getResponse();
if (redirect) {
return (response.encodeRedirectURL(url.toString()));
} else {
return (response.encodeURL(url.toString()));
}
} else {
return (url.toString());
}
Then, I only want to know if this is a correct behaviour, because this is
not in concordance with the Struts documentation. As I know, we should be
able to use something similar to html:link href=index.jspMain
Page/html:link and benefit of URL rewriting to preserve session when
cookies are disable.
Thanks
-
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Re: [STRUTS 2X]: Ideas
If someone have not noticed my another message, I have got the article published. It discusses the idea of two-phase components, JSP controls and Struts implementation: http://today.java.net/pub/a/today/2005/08/04/jspcomponents.html I hope that the article explains better what I has been offering for last couple of months. The article discusses the issue from another perspective, but I hope it is even better to see the same thing from a different angle. Michael --- Struts Dialogs http://struts.sourceforge.net/strutsdialogs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: DTOs are evil
That's how my persistence framework goes. All my data extends a data object which makes public CRUD methods that accept a persister, you can then have File persisters, Database persisters etc. An employee shouldn't have any knowledge of how they persist in an enterprise IMHO. All that logic is placed in the persister. Employee employee = new Employee(); employee.setKey(1); // Reads and populates an employee. EmployeeDBPersister dbPersister = new EmployeeDBPersister(conn); employee.read(dbPersister); // Writes the employee to a file. EmployeeFilePersister filePersister = new EmployeeFilePersister(file); employee.create(filePersister); I hate DAO's. The company I work for uses them. Basically one class to do all the logic related in any way shape of form to a valgue amount of database tables. They then change a column on a table and wonder why there code is a nightmare to fix. If you have one Persister responsible for a table then you change the four pieces of sql for create read update and delete and you are laughing. In answer to the collections comment, I have managers which my application interfaces with to get collections. Basically something like EmployeeManager manager = new EmployeeManager(); ArrayList employees = manager.getEmployees(); And the method gets all the keys in a separate piece of SQL and then calls the code I have shown above. -Original Message- From: Rick Reumann [mailto:[EMAIL PROTECTED] Sent: 04 August 2005 16:15 To: Struts Users Mailing List Subject: Re: DTOs are evil Michael Jouravlev wrote the following on 8/3/2005 9:07 PM: http://www.theserverside.com/news/thread.tss?thread_id=35233 Just curious what are Rod's exact views on the DTO? I searched for DTOs on that link you posted but only saw posts by other people. I do agree, though, with what others have said that DTOs/ValueObjects aren't really that OO. It's funny that the subject comes up because I was a late bloomer to the programming world (started about 6 years and was a waiter and science teacher before that:), and when I first started reading the Java books and then applying that to what I was reading/seeing in JSP projects I was on, the concepts did seem to conflict. What I mean is take the concept of an Employee. In almost all web applications you see the EmployeeDTO being passed to the DAO... employeeDAO.updateEmployee( employee ); From what I recall the real OO way would be... employee.update(); and employee takes care of updating itself. From an OO perspective I don't see a problem having an Employee object that has a DAO inside that takes care of persistence. I do have a couple questions though about OO design if this approach is used... 1) Where do you encapsulate getting Collections back of your objects? For example an Employee object has CRUD methods, but what about you when you need a List of Employees? Do you make an EmployeeList object that has methods getEmployees? Do you maybe just 'cheat' and add a getList or getEmployees method directly to the Employee object? 2) It also seems a bit heavy to return Collections of pretty heavy objects. (Each Employee since it's not a simple VO could be a large object - although by large I just mean having a bunch of methods in it etc - I'm not so sure it would be large footprint-wise if just the properties were being filled in the case of a list - so bottom line is maybe the extra stuff in the object doesn't matter much? Side note... 3) Even from an OO perspective, you always hear about encapsulating unique behaviors to make things reusable, so in a sense couldn't you consider the 'properties' of an Employee 'unique' or, if not the properties, the CRUD stuff is 'sort of' unique? If this is the case, you could make an argument for separating out the properties into another object (DTO/VO) separate? -- Rick - 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: [OT] My O'Reilly Open Source Conference Talk
Nope what channel is it on? -Original Message- From: Michael Jouravlev [mailto:[EMAIL PROTECTED] Sent: 04 August 2005 16:32 To: Struts Users Mailing List Subject: Re: [OT] My O'Reilly Open Source Conference Talk On 8/4/05, Mark Benussi [EMAIL PROTECTED] wrote: Ahem JSF is not a Framework, it is an implementation specification. Its not made by someone like Apache or Sun (But can be implemented by them to the specification or by another vendor, IBM etc). Struts is an application Framework, JSF is a user interface implementation. JSF was supposed to be just a view layer, but now it is a framework on itself. Ok, there are two frameworks: Sun's and Apache's ;) And I prefer the muts nuts. that must transalate accross to the boys on the other side of the atlantic. Have you watched Formula 51? Michael. - 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: checkbox initially checked?
Swapnil Patil wrote: Otherwise, the place to do this is in your Action, before you forward to the JSP. I am interested in populating Form before loading jsp page so that I can assign values to HTML comtrols. HOw to do that? In your Action, before you forward to the JSP??? Wow, that was spooky... it's alsmot as though you answered your own question before you even asked it. I wish I could do that. Dave - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: checkbox initially checked?
Thanks it worked! Actually had List of Objects I was forwarding. And in my action class I just did the following as I was building the list Object.setSelected(true); Where the Object class had a boolean called selected. -Original Message- From: Dave Newton [mailto:[EMAIL PROTECTED] Sent: Thursday, August 04, 2005 12:11 PM To: Struts Users Mailing List Subject: Re: checkbox initially checked? Swapnil Patil wrote: Otherwise, the place to do this is in your Action, before you forward to the JSP. I am interested in populating Form before loading jsp page so that I can assign values to HTML comtrols. HOw to do that? In your Action, before you forward to the JSP??? Wow, that was spooky... it's alsmot as though you answered your own question before you even asked it. I wish I could do that. Dave - 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: Showing a PDF inside a JSP
hihi, i've also worked quite a bit with generating PDF documents (iText, JasperReports via iReport) so i know Acrobat pains too. (yes Acrobat is very moody, it works one day then not the next, and only for ppl it likes) :) i went to that website: http://www.sos.state.co.us/biz but couldn't find a working example of a PDF document displayed embedded *within* an html page. that is, the Acrobat plugin window occupying a sub portion of the entire displayed html page. is this not what the original post was about? or did i simply not find the working example on the website? (i went to the File a document section and brought up the PDFs on the subsequent page but they all 'took over' the entire browser window) it would be awesome to see a PDF embedded in an html page without using frames. Try a reservation of name filing. It is a short one that is open to the public. You are able to view the statement before paying for it (uses the embedeed pdf). Gary woodchuck - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DTOs are evil
Rick Reumann wrote: Michael Jouravlev wrote the following on 8/3/2005 9:07 PM: http://www.theserverside.com/news/thread.tss?thread_id=35233 Just curious what are Rod's exact views on the DTO? I searched for DTOs on that link you posted but only saw posts by other people. Mechael's referring to a throw-away one-liner about half way through the actual presentation (which is about an hour and a quarter long if you want to sit through it; it's not a bad introduction to the issues involved in handling persistence). Rod doesn't explain or justify his statement in the presentation. L. -- Laurie, Open Source advocate, Java geek and novice blogger: http://www.holoweb.net/laurie - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Deploying on Tomcat - Urgent
Hello, I am trying to deploy my Struts application on Tomcat 5.0.28 on Win2k. I get the following error on my browser when I try to start up. My application has tiles in them and I believe I configured everything properly. I was able to successfully deploy and run the application in Websphere App Server 5.1 through WSAD. But it just doesn't run on Tomcat. I created a WAR file and dropped it in webapps folder in Tomcat home and tried starting up the server. I have my server.xml configured too. Please help. Thanks Gnan exception javax.servlet.ServletException: Can't get definitions factory from context. at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextI mpl.java:825) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp l.java:758) at org.apache.jsp.index2_jsp._jspService(index2_jsp.java:72) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 24) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:157) at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter .java:114) root cause javax.servlet.jsp.JspException: Can't get definitions factory from context. at org.apache.struts.taglib.tiles.InsertTag.processDefinitionName(InsertTag.jav a:616) at org.apache.struts.taglib.tiles.InsertTag.createTagHandler(InsertTag.java:515 ) at org.apache.struts.taglib.tiles.InsertTag.doStartTag(InsertTag.java:477) at org.apache.jsp.index2_jsp._jspx_meth_tiles_insert_0(index2_jsp.java:88) at org.apache.jsp.index2_jsp._jspService(index2_jsp.java:62) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 24) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:157) at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter .java:114) This email message is for the sole use of the intended recipient (s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. To reply to our email administrator directly, send an email to [EMAIL PROTECTED] Toys R Us, Inc. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DTOs are evil
On 8/4/05, Laurie Harper [EMAIL PROTECTED] wrote: Rick Reumann wrote: Michael Jouravlev wrote the following on 8/3/2005 9:07 PM: http://www.theserverside.com/news/thread.tss?thread_id=35233 Just curious what are Rod's exact views on the DTO? I searched for DTOs on that link you posted but only saw posts by other people. Mechael's referring to a throw-away one-liner about half way through the actual presentation (which is about an hour and a quarter long if you want to sit through it; it's not a bad introduction to the issues involved in handling persistence). Rod doesn't explain or justify his statement in the presentation. To squeeze 60-something slides into 60 minutes, he should have been prepared. I do not believe that this throw away one-liner was not mentioned somewhere in his notes. But yes, he have not (yet) explained this remark on TSS. Maybe it was a hook to have others talk about presentation ;) Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: DTOs are evil
I too have taken something of a hybrid approach in most cases...
I created something called a Function Bean (FB), which for all intents and
purposes is really just a DAO. For instance, in one app I have a ClientFB
class that has methods like:
ArrayList getClientList();
ClientDTO getClientInfo(String id);
boolean saveClient(ClientDTO client);
boolean deleteClient(String id);
All the typical methods... note that the DTOs are really only for data
storage and transpot... there are usually no operations attached (except
sometimes for simple things like comparisons and such).
In any case, only these FBs know anything about how the data is stored.
Then I have a ClientFBHelper class that is where the actual business
logic-type things reside, so that the ClientFB winds up just dealing with
persistance. So, in it I might have:
boolean isClientValid(ClientDTO client);
Where it starts to become a little bit of a hybrid is that the FBs don't
actually, in many cases, map to real modeled objects. I'd describe them
as more mapping to a view of the model.
So in my Actions I do things like (in the case of saving a client):
ClientFB cfb = fbfactory.get(ClientFB);
ClientFBHelper cfbh = fbhelperfacroty.get(ClientFBHelper);
ClientDTO cdto = new ClientDTO();
PropertyUtils.copyProperties(cdto, actionform);
ActionForward af;
if (cfbh.isClientValid(cdto)) {
if (cfb.saveClient(cdto)) {
af = mapping.findForward(goodsave);
} else {
af = mapping.findForward(badsave);
}
} else {
af = mapping.findForward(notvalid);
}
return af;
The FBs and FBHelpers are gotten from a factory only, so I can control
various things easily (i.e., the factory makes sure the beans get set up
in the beginning and cleaned up at the end, share a database connection if
need be, things like that). There is actually a Struts base Action that
instantiates the factories and passes them into execute() and then cleans
them up afterwards, but that's kind of outside this particular discussion.
I even toyed at one point with the idea of doing all of the above from a
config file and reducing the app to a single specialized Action in most
places. When you find that most of your Actions look like the above,
that's a fairly appealing idea!
The nice thing about this setup is that I can test the persistance in the
FBs separate from the application and the helper classes separate from the
FBs and the app, etc. It's also trivially easy to mock up either to test
the app.
In this approach, you can have a persistence framework involved or not.
We've only recently here decided to use Hibernate across-the-board, so
much of our existing apps are straight JDBC. But, converting them to use
Hibernate will only require changes in the FBs, everything else remains
the same (I've done some pilots to test that theory, and it works out
nicely).
So, to Rick's original point, I guess this really isn't as OO as we all
started out learning :) But, as with most things it's an evolution of
understanding... I'd be willing to bet that 5 years from now we won't be
writing apps like we do today either and we'll wonder why we ever did
things this way or that.
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
On Thu, August 4, 2005 12:05 pm, Mark Benussi said:
That's how my persistence framework goes.
All my data extends a data object which makes public CRUD methods that
accept a persister, you can then have File persisters, Database persisters
etc. An employee shouldn't have any knowledge of how they persist in an
enterprise IMHO. All that logic is placed in the persister.
Employee employee = new Employee();
employee.setKey(1);
// Reads and populates an employee.
EmployeeDBPersister dbPersister = new EmployeeDBPersister(conn);
employee.read(dbPersister);
// Writes the employee to a file.
EmployeeFilePersister filePersister = new EmployeeFilePersister(file);
employee.create(filePersister);
I hate DAO's. The company I work for uses them. Basically one class to do
all the logic related in any way shape of form to a valgue amount of
database tables. They then change a column on a table and wonder why there
code is a nightmare to fix. If you have one Persister responsible for a
table then you change the four pieces of sql for create read update and
delete and you are laughing.
In answer to the collections comment, I have managers which my application
interfaces with to get collections. Basically something like
EmployeeManager manager = new EmployeeManager();
ArrayList employees = manager.getEmployees();
And the method gets all the keys in a separate piece of SQL and then calls
the code I have shown above.
-Original Message-
From: Rick Reumann [mailto:[EMAIL PROTECTED]
Sent: 04 August 2005 16:15
To: Struts Users Mailing List
Subject: Re: DTOs are evil
Michael Jouravlev wrote the following on 8/3/2005 9:07 PM:
http://www.theserverside.com/news/thread.tss?thread_id=35233
Re: DTOs are evil
Rick Reumann wrote:
I do agree, though, with what others have said that DTOs/ValueObjects
aren't really that OO. It's funny that the subject comes up because I
was a late bloomer to the programming world (started about 6 years and
was a waiter and science teacher before that:), and when I first started
reading the Java books and then applying that to what I was
reading/seeing in JSP projects I was on, the concepts did seem to conflict.
What I mean is take the concept of an Employee. In almost all web
applications you see the EmployeeDTO being passed to the DAO...
employeeDAO.updateEmployee( employee );
From what I recall the real OO way would be...
employee.update();
and employee takes care of updating itself.
The idea of a DTO is to encapsulate the persistence logic so that it can be
independent of the model representation and business logic, and easily
replaceable. There's nothing saying you can't put an update() method on
your business objects and have it delegate to a DTO but you risk having an
explosion of data access methods on your business objects that way. Since
persistence is typically a quite separate concern from other domain logic,
it makes sense to separate it out.
From an OO perspective I don't see a problem having an Employee object
that has a DAO inside that takes care of persistence. I do have a couple
questions though about OO design if this approach is used...
1) Where do you encapsulate getting Collections back of your objects?
For example an Employee object has CRUD methods, but what about you when
you need a List of Employees? Do you make an EmployeeList object that
has methods getEmployees? Do you maybe just 'cheat' and add a getList or
getEmployees method directly to the Employee object?
Looking up lists of things is sort of a meta-concern; you're right, putting
that on the Employee object would clutter things up, especially when you
start needing more complex queries -- e.g.
getEmployeesEligibleForPerformanceBonus() etc. Since these kinds of
operations are a higher level concern (i.e. they aren't operations on
employees but on the entire data class) they should typically live in a
higher layer. That's often represented as a 'service' or 'manager' API,
which also turns out to be a good place to put business-transaction type
operations which also tend to cross-cut across multiple domain objects.
2) It also seems a bit heavy to return Collections of pretty heavy
objects. (Each Employee since it's not a simple VO could be a large
object - although by large I just mean having a bunch of methods in it
etc - I'm not so sure it would be large footprint-wise if just the
properties were being filled in the case of a list - so bottom line is
maybe the extra stuff in the object doesn't matter much?
It depends on how 'connected' your domain objects are. If an employee
references a manager and a manager contains a collection of reports and ...
then you need to care about how much of the object graph you load when you
load each employee. different persistence frameworks and ORM tools have
different ways of managing this. If you need most of the data stored on an
employee from the list, returning a list of employees makes sense. If you
only need a sub-set of the properties on each employee, returning an
intermediate representation of the specific data query will make more sense.
Side note...
3) Even from an OO perspective, you always hear about encapsulating
unique behaviors to make things reusable, so in a sense couldn't you
consider the 'properties' of an Employee 'unique' or, if not the
properties, the CRUD stuff is 'sort of' unique? If this is the case, you
could make an argument for separating out the properties into another
object (DTO/VO) separate?
OO generally talks about grouping behaviour and data together, so factoring
out the properties into a separate object would be less OO than factoring
out a sub-set of the behaviour (the CRUD actions). In particular, CRUD
actions are not behaviour of the business object ('save employee object to
the database' is not an operation that makes sense in the context of the
business domain, it's an implementation artifact [speaking broadly]).
That's partly what makes them a good candidate for encapsulating separately.
L.
--
Laurie, Open Source advocate, Java geek and novice blogger:
http://www.holoweb.net/laurie
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Re: Problem in populating html controls from Bean...
From: Laurie Harper [EMAIL PROTECTED]
This really should be an FAQ :-) The problem is that it's not legal to
nest JSP tags that way. Try:
html:text property=title value=${someBean.oldTitle}
or
html:text property=title value=%= someBean.getOldTitle() %
That prevents the framework from re-displaying the user's input if the form
fails
validation.
At the risk of repeating myself: the place to pre-populate your form beans
is in the Action, before you forward to the JSP.
--
Wendy Smoak
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RE: Deploying on Tomcat - Urgent
Post your web.xml file... (you can omit mime defs from it) and the controller and plugin part of your struts config file rgds aleiprecht -Original Message- From: Shabada, Gnaneshwer [mailto:[EMAIL PROTECTED] Sent: Thursday, August 04, 2005 6:41 PM To: 'user@struts.apache.org' Subject: Deploying on Tomcat - Urgent Hello, I am trying to deploy my Struts application on Tomcat 5.0.28 on Win2k. I get the following error on my browser when I try to start up. My application has tiles in them and I believe I configured everything properly. I was able to successfully deploy and run the application in Websphere App Server 5.1 through WSAD. But it just doesn't run on Tomcat. I created a WAR file and dropped it in webapps folder in Tomcat home and tried starting up the server. I have my server.xml configured too. Please help. Thanks Gnan exception javax.servlet.ServletException: Can't get definitions factory from context. at org.apache.jasper.runtime.PageContextImpl.doHandlePageException(PageContextI mpl.java:825) at org.apache.jasper.runtime.PageContextImpl.handlePageException(PageContextImp l.java:758) at org.apache.jsp.index2_jsp._jspService(index2_jsp.java:72) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 24) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:157) at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter .java:114) root cause javax.servlet.jsp.JspException: Can't get definitions factory from context. at org.apache.struts.taglib.tiles.InsertTag.processDefinitionName(InsertTag.jav a:616) at org.apache.struts.taglib.tiles.InsertTag.createTagHandler(InsertTag.java:515 ) at org.apache.struts.taglib.tiles.InsertTag.doStartTag(InsertTag.java:477) at org.apache.jsp.index2_jsp._jspx_meth_tiles_insert_0(index2_jsp.java:88) at org.apache.jsp.index2_jsp._jspService(index2_jsp.java:62) at org.apache.jasper.runtime.HttpJspBase.service(HttpJspBase.java:94) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:3 24) at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:292) at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:236) at javax.servlet.http.HttpServlet.service(HttpServlet.java:802) at org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(Application FilterChain.java:237) at org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterCh ain.java:157) at org.displaytag.filter.ResponseOverrideFilter.doFilter(ResponseOverrideFilter .java:114) This email message is for the sole use of the intended recipient (s) and may contain confidential and privileged information. Any unauthorized review, use, disclosure or distribution is prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message. To reply to our email administrator directly, send an email to [EMAIL PROTECTED] Toys R Us, Inc. - 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: Showing a PDF inside a JSP
--- Gary VanMatre [EMAIL PROTECTED] wrote: Try a reservation of name filing. It is a short one that is open to the public. You are able to view the statement before paying for it (uses the embedeed pdf). Gary, very nice!! thanks for this great tip, i'm sure it will come in handy in the future. :) it didn't work in FireFox, but it did in IE. (you probably know this already) best regards, woodchuck Gary woodchuck - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED] Start your day with Yahoo! - make it your home page http://www.yahoo.com/r/hs - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
RE: Deploying on Tomcat - Urgent
THanks for your reply. Here is my plug-in part from struts-config.xml. I don't have a Controller part. plug-in className=org.apache.struts.validator.ValidatorPlugIn set-property property=pathnames value=/WEB-INF/validator-rules.xml,/WEB-INF/validation.xml / /plug-in plug-in className=org.acaosa.registration.web.plugin.RegistrationPlugIn /plug-in plug-in className=org.apache.struts.tiles.TilesPlugin set-property property=definitions-config value=/WEB-INF/tiles-defs.xml/ set-property property=moduleAware value=true / set-property property=definitions-parser-validate value=true / /plug-in here is web.xml ?xml version=1.0 encoding=UTF-8? !DOCTYPE web-app PUBLIC -//Sun Microsystems, Inc.//DTD Web Application 2.3//EN http://java.sun.com/dtd/web-app_2_3.dtd; web-app id=WebApp display-nameAcaosaRegistrationWeb/display-name filter filter-nameResponseOverrideFilter/filter-name filter-classorg.displaytag.filter.ResponseOverrideFilter/filter-class /filter filter-mapping filter-nameResponseOverrideFilter/filter-name url-pattern*.do/url-pattern /filter-mapping filter-mapping filter-nameResponseOverrideFilter/filter-name url-pattern*.jsp/url-pattern /filter-mapping !--listener listener-classcom.sun.faces.config.ConfigureListener/listener-class /listener-- servlet servlet-nameaction/servlet-name servlet-classorg.apache.struts.action.ActionServlet/servlet-class init-param param-nameapplication/param-name param-valueorg.acaosa.registration.resources.ApplicationResources/param-v alue /init-param init-param param-nameconfig/param-name param-value/WEB-INF/struts-config.xml/param-value /init-param init-param param-namedebug/param-name param-value2/param-value /init-param init-param param-namedetail/param-name param-value2/param-value /init-param init-param param-namevalidate/param-name param-valuetrue/param-value /init-param init-param param-namedefinitions-config/param-name param-value/WEB-INF/tiles-defs.xml/param-value /init-param load-on-startup2/load-on-startup /servlet servlet servlet-nameLog4jInit/servlet-name servlet-classorg.acaosa.registration.web.plugin.Log4jInit/servlet-class init-param param-namelog4j-init-file/param-name param-valuelog4j.properties/param-value /init-param init-param param-namecommons-logging/param-name param-valuecommons-logging.properties/param-value /init-param load-on-startup2/load-on-startup /servlet servlet-mapping servlet-nameaction/servlet-name url-pattern*.do/url-pattern /servlet-mapping welcome-file-list welcome-fileindex2.jsp/welcome-file welcome-filedefault.html/welcome-file welcome-filedefault.htm/welcome-file welcome-filedefault.jsp/welcome-file /welcome-file-list taglib taglib-uri/WEB-INF/struts-bean.tld/taglib-uri taglib-location/WEB-INF/struts-bean.tld/taglib-location /taglib taglib taglib-uri/WEB-INF/struts-html.tld/taglib-uri taglib-location/WEB-INF/struts-html.tld/taglib-location /taglib taglib taglib-uri/WEB-INF/struts-logic.tld/taglib-uri taglib-location/WEB-INF/struts-logic.tld/taglib-location /taglib taglib taglib-uri/WEB-INF/struts-nested.tld/taglib-uri taglib-location/WEB-INF/struts-nested.tld/taglib-location /taglib taglib taglib-uri/WEB-INF/struts-template.tld/taglib-uri taglib-location/WEB-INF/struts-template.tld/taglib-location /taglib taglib taglib-uri/WEB-INF/struts-tiles.tld/taglib-uri taglib-location/WEB-INF/struts-tiles.tld/taglib-location /taglib taglib taglib-urihttp://www.ibm.com/websphere/wdo/core/taglib-uri taglib-location/WEB-INF/lib/wdo_web.jar/taglib-location /taglib resource-ref
Re: DTOs are evil
Frank W. Zammetti wrote:
ArrayList getClientList();
ClientDTO getClientInfo(String id);
boolean saveClient(ClientDTO client);
boolean deleteClient(String id);
In any case, only these FBs know anything about how the data is stored.
I do much the same thing defined as an interface so I can switch
persistence mechanisms.
(Hey, shouldn't getClientList return a List? ;)
I've never actually switched persistence mechanisms, of course, which
leads me to wonder if I really need[ed] to do all that work. :/
I even toyed at one point with the idea of doing all of the above from a
config file and reducing the app to a single specialized Action in most
places. When you find that most of your Actions look like the above,
that's a fairly appealing idea!
That's actually where I'm headed right now for generic CMS/CRUD, but I'm
getting bogged down.
*sigh*
So, to Rick's original point, I guess this really isn't as OO as we all
started out learning :)
Well, yes and no--Common Lisp implements its OO by using generic methods:
(when (isValid cfbh cfb)
(save cfb cdto))
so you still write an isValid and a save for each useful combination of
FB and FBHelpers, but methods are dispatchedd based on the types of the
parameters. More or less the same as if you wrote a class like this:
public class SortaGeneric {
public static boolean isValid(ClientFBHelper cfbh_, ClientDTO cdto_) {
// ... and then a miracle occurs
return resultsOfClientDtoValidation;
}
public static boolean isValid(CompanyFBHelper cfbh_, CompanyDTO cdto_) {
// ... you get the idea
}
}
and did
if (SortaGeneric.isValid(cfbh, cdto)) {
if (SortaGeneric.save(cdto)) {
}
}
but in Lisp you can define the generics in a more appropriate place than
a non-local static method class.
The only real difference between this and what you've done is the
location of those methods--basically OO-by-hand rather than letting the
system do it for you. With mild config and reflection you could remove
the class depedencies in the actions, which is where my low-level stuff
seems to be heading at the moment.
Dave
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Re: DTOs are evil
Laurie Harper wrote the following on 8/4/2005 12:58 PM:
Looking up lists of things is sort of a meta-concern; you're right,
putting that on the Employee object would clutter things up, especially
when you start needing more complex queries -- e.g.
getEmployeesEligibleForPerformanceBonus() etc. Since these kinds of
operations are a higher level concern (i.e. they aren't operations on
employees but on the entire data class) they should typically live in a
higher layer. That's often represented as a 'service' or 'manager' API,
which also turns out to be a good place to put business-transaction type
operations which also tend to cross-cut across multiple domain objects.
This is EXACTLY what I currently do and even use the term Service
since it makes sense to me. (I also use regular DTOs in the standard
way.. simply a POJO). I guess my question is more to those (Rod?) that
say DTOs are a bad idea since I think it makes sense to have them. For
example, as your description above you might have a method in a service
class that is: getEmployeesEligibleForPerformanceBonus() To me, it also
then makes sense to encapsulate other Employee related operations there
also including standard CRUD stuff. I find an application to become
confusing when operations start being handled in different layers (ie
some done from Service/Delegate classes, some called from the
ValueObject itself).
OO generally talks about grouping behaviour and data together, so
factoring out the properties into a separate object would be less OO
than factoring out a sub-set of the behaviour (the CRUD actions).
True, my initial statement was poorly worded, what I meant, though, was
in regard to the DTO debate, once you do factor of the CRUD stuff you
are left with just your standard DTO, but the distinction you make is
noteworthy.
In particular, CRUD actions are not behaviour of the business object ('save
employee object to the database' is not an operation that makes sense in
the context of the business domain, it's an implementation artifact
[speaking broadly]). That's partly what makes them a good candidate for
encapsulating separately.
I totally agree, yet this topic seems to come up a lot - where you'll
see people state it's 'better design' and 'adheres more to standard OO'
to do just the opposite (that is add these kind of CRUD methods to the
object in question). I tend to agree that CRUD actions are NOT behaviors
of business objects. For example, if working with Dog objects a save
is much different than say performBark(). Barking, moving, eating
owner's shoes, are behavior of a Dog - I don't see CRUD in the same light.
--
Rick
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Re: Problem in populating html controls from Bean...
Wendy Smoak wrote the following on 8/4/2005 1:27 PM:
html:text property=title value=${someBean.oldTitle}
That prevents the framework from re-displaying the user's input if the
form fails
validation.
At the risk of repeating myself: the place to pre-populate your form beans
is in the Action, before you forward to the JSP.
Yes exactly.
And if you are going to hardcode the value in there then you might as
well not even use the Struts html tags?
html:text property=title value=${someBean.oldTitle}
Could just become
input type=text name=title value=${someBean.oldTitle}/
Occasionaly I will set a value manually in my JSP but for the most part,
as Wendy states, this is usually a very bad practice Swapnil (form bean
properties should be in place before going to the JSP).
--
Rick
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Re: DTOs are evil
On Thu, August 4, 2005 2:12 pm, Dave Newton said:
Frank W. Zammetti wrote:
ArrayList getClientList();
ClientDTO getClientInfo(String id);
boolean saveClient(ClientDTO client);
boolean deleteClient(String id);
(Hey, shouldn't getClientList return a List? ;)
Yep, I suppose it should :) I have a bad habit of specifying
implementations rather than interfaces for collections. Some day I'll
break myself of it :)
I've never actually switched persistence mechanisms, of course, which
leads me to wonder if I really need[ed] to do all that work. :/
I've yet to do it either, although I may have to with my most recent app.
I'm not really looking forward to it... I don't mind learning new stuff as
part of a new project, but retrofitting tends to be more annoying than
fun, for me anyway.
I even toyed at one point with the idea of doing all of the above from a
config file and reducing the app to a single specialized Action in most
places. When you find that most of your Actions look like the above,
that's a fairly appealing idea!
That's actually where I'm headed right now for generic CMS/CRUD, but I'm
getting bogged down.
*sigh*
This kind of goes with the whole framework discussions around here
recently... this is the kind of thing I'd like to see in a new framework.
I think there are large chunks of most webapps that can be developed in
a purely declarative way, if the system is robust enough. I should only
have to write code for the more fringe cases (maybe not QUITE fringe
cases, but I think you know what I mean).
Well, yes and no--Common Lisp implements its OO by using generic methods:
(when (isValid cfbh cfb)
(save cfb cdto))
so you still write an isValid and a save for each useful combination of
FB and FBHelpers, but methods are dispatchedd based on the types of the
parameters. More or less the same as if you wrote a class like this:
public class SortaGeneric {
public static boolean isValid(ClientFBHelper cfbh_, ClientDTO cdto_) {
// ... and then a miracle occurs
return resultsOfClientDtoValidation;
}
public static boolean isValid(CompanyFBHelper cfbh_, CompanyDTO cdto_)
{
// ... you get the idea
}
}
and did
if (SortaGeneric.isValid(cfbh, cdto)) {
if (SortaGeneric.save(cdto)) {
}
}
but in Lisp you can define the generics in a more appropriate place than
a non-local static method class.
The only real difference between this and what you've done is the
location of those methods--basically OO-by-hand rather than letting the
system do it for you. With mild config and reflection you could remove
the class depedencies in the actions, which is where my low-level stuff
seems to be heading at the moment.
Interesting stuff! I like the comment about removing the class
dependencies from the Actions, that's really what my declarative version
did, at least as far as the proof-of-concept went... I added some config
elements to struts-config that allowed you to declare what FBs and
FBHelpers each Action needed. So, you might see:
actionDependencies action=action1
object name=ClientFBcom.company.app.ClientFB/object
object name=ClientFBHelpercom.company.app.ClientFBHelper/object
/actionDependencies
So, in a sense, those dependencies were injected into the Action. You
just did the action work with them, everything else was handled outside.
Then I had a special Action base class that worked against an XML file.
So, in keeping with my examples from before, you might see:
action name=action1
function id=1createDTO:ClientDTO/function
function id=2copyActionForm:ClientDTO/function
function
id=3callMethod:ClientHelper.isClientValid(ClientDTO)/function
check sourceid=3
if outcome=falsereturnForward:clientnotvalid/if
/check
function id=4callMethod:ClientFB.saveClient(ClientDTO)/function
check sourceid=4
if outcome=truereturnForward:goodsave/if
if outcome=falsereturnForward:badsave/if
/check
/action
The createDTO, copyActionForm, callMethod and returnForward were standard
commands I could issue. I got it working to this point, never took the
exercise any further... there were some obvious problems that would have
taken a bit more effort to solve, but more importantly I wasn't really
sure it was actually better... declarative over code is almost always true
for me, but there is a certain point where the declarative complexity
outweighs just writing the code. This might have been one of those cases,
I'm not sure :)
Even still, I think the idea is an interesting one, if done well.
Frank
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RE: Deploying on Tomcat - Urgent
Albi, I commented out all the below stuff you mentioned in my web.xml and also in my struts-config.xml I just left the plugin tags and commented rest of them. I still get the same error and nothing in the logs I find the same stack trace. I also find one extra error during the server start up as follows: I am confused as to how this would work in WAS and not in Tomcat, I thought Tomcat would be more simpler .. anyways let me know if you find something..thanks 2005-08-04 15:23:48 StandardContext[/acaosareg]action: null org.acaosa.registration.RegistrationException: Exception in RegistrationFacade while getting state information.: =: Cannot create resource instance at org.acaosa.registration.RegistrationFacade.getState(RegistrationFacade.java: 193) at org.acaosa.registration.util.RegistrationServices.getStateList(RegistrationS ervices.java:82) at org.acaosa.registration.web.plugin.RegistrationPlugIn.init(RegistrationPlugI n.java:66) at org.apache.struts.action.ActionServlet.initModulePlugIns(ActionServlet.java: 868) at org.apache.struts.action.ActionServlet.init(ActionServlet.java:368) at javax.servlet.GenericServlet.init(GenericServlet.java:211) at org.apache.catalina.core.StandardWrapper.loadServlet(StandardWrapper.java:10 29) at org.apache.catalina.core.StandardWrapper.load(StandardWrapper.java:862) at org.apache.catalina.core.StandardContext.loadOnStartup(StandardContext.java: 4013) at org.apache.catalina.core.StandardContext.start(StandardContext.java:4357) at org.apache.catalina.core.ContainerBase.addChildInternal(ContainerBase.java:8 23) at org.apache.catalina.core.ContainerBase.addChild(ContainerBase.java:807) at org.apache.catalina.core.StandardHost.addChild(StandardHost.java:595) at org.apache.catalina.core.StandardHostDeployer.addChild(StandardHostDeployer. java:903) at java.lang.reflect.Method.invoke(Native Method) at org.apache.commons.beanutils.MethodUtils.invokeMethod(MethodUtils.java:216) at org.apache.commons.digester.SetNextRule.end(SetNextRule.java:256) at org.apache.commons.digester.Rule.end(Rule.java:276) at org.apache.commons.digester.Digester.endElement(Digester.java:1058) at org.apache.catalina.util.CatalinaDigester.endElement(CatalinaDigester.java:7 6) at org.apache.xerces.parsers.AbstractSAXParser.endElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanEndElement(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl$FragmentContentDispatc her.dispatch(Unknown Source) at org.apache.xerces.impl.XMLDocumentFragmentScannerImpl.scanDocument(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XML11Configuration.parse(Unknown Source) at org.apache.xerces.parsers.XMLParser.parse(Unknown Source) at org.apache.xerces.parsers.AbstractSAXParser.parse(Unknown Source) at org.apache.commons.digester.Digester.parse(Digester.java:1567) at org.apache.catalina.core.StandardHostDeployer.install(StandardHostDeployer.j ava:488) at org.apache.catalina.core.StandardHost.install(StandardHost.java:863) at org.apache.catalina.startup.HostConfig.deployDescriptors(HostConfig.java:483 ) at org.apache.catalina.startup.HostConfig.deployApps(HostConfig.java:427) at org.apache.catalina.startup.HostConfig.start(HostConfig.java:983) at org.apache.catalina.startup.HostConfig.lifecycleEvent(HostConfig.java:349) at org.apache.catalina.util.LifecycleSupport.fireLifecycleEvent(LifecycleSuppor t.java:119) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1091) at org.apache.catalina.core.StandardHost.start(StandardHost.java:789) at org.apache.catalina.core.ContainerBase.start(ContainerBase.java:1083) at org.apache.catalina.core.StandardEngine.start(StandardEngine.java:478) at org.apache.catalina.core.StandardService.start(StandardService.java:480) at org.apache.catalina.core.StandardServer.start(StandardServer.java:2313) at org.apache.catalina.startup.Catalina.start(Catalina.java:556) at java.lang.reflect.Method.invoke(Native Method) at org.apache.catalina.startup.Bootstrap.start(Bootstrap.java:287) at org.apache.catalina.startup.Bootstrap.main(Bootstrap.java:425) Caused by: org.acaosa.registration.servicelocator.ServiceLocatorException: =: Cannot create resource instance at org.acaosa.registration.servicelocator.ServiceLocator.getDataSource(ServiceL ocator.java:187) at org.acaosa.registration.util.dao.DAOUtility.getDataSource(DAOUtility.java:28 ) at org.acaosa.registration.util.dao.DAOUtility.getDBConnection(DAOUtility.java: 39) at
[OT?] JSF - struts-faces-20050728.zip - integrating with Tiles
Hi all: This is my first message to the list after a *very* long time so I apologize in advance if this is either considered OT (I couldn't find a JSF list??) or this topic has been recently discussed. I am trying to integrate my struts+tiles(+xdoclet) app with jsf and am having trouble with integration of tiles. Anyways, I finally downloaded the struts-faces-20050728.zip from cvs, and am trying to get struts-faces-example2.war to work. (since this is supposed to deal with tiles, right..?) When i go to http://localhost:8080/struts-faces-example2/ I see two nice links saying Log On and Register but when I click on them nothing happens..? *Is* something supposed to?? The source for this page has, for example, form id=menu:_id5 name=registrationForm action=/struts-faces-example2/layout.do method=post input type=hidden name=menu:_id5 value=menu:_id5 / a id=menu:_id5:register href=# onclick=document.forms['menu:_id5']['menu:_id5:_idcl'].value='menu:_id5:register'; document.forms['menu:_id5'].submit(); return false;Register/ainput type=hidden name=menu:_id5 value=menu:_id5 / /form so I imagine something should happen..? Or is this example not done yet? Many thanks in advance for all help! Geeta P.S. I have searched the archives, googled a lot, and have tried out a lot of dated advice (!), but have basically been spinning my wheels for three days now, hence this note..
help on plugin and i18n
hi all, i'm new to struts , i just come up with the concept and i would like to know where i'll get struts plugin for eclipse for jboss server in linux . i'm working on internationalization , i deployed an application but i'm getting an error message in the index.jsp page javax.servlet.ServletException: Missing message for key app.username i have defined applicationresources property file and also other property file , but i'm not able to run the program . what can be the problem regards Anoop - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
[Request] Struts documentation update
Hello, I propose to modify Struts documentation named Realm Configuration HOW-TO located at http://jakarta.apache.org/tomcat/tomcat-5.5-doc/realm-howto.html. Today I spent at work 4 hours (!) fighting with DataSourceRealm. I had a continuously error: javax.naming.NameNotFoundException: Name jdbc is not bound in this Context. I got really mad because data source was excellently configured. I searched tons of web pages using google and found only that many people have similar problem. Both colleague and I haven't got any idea what is wrong. Finally, at home, 20 minutes ago (23:00 ;-), I figured out what was the reason. localDataSource parameter has to be set to true. I found this solution on usenet archive in Polish post written more that year ago. All the time I tried to make crazy things with this parameter because I thought that this had to be an JNDI address (or false), not true value! In my opinion, confirmed with others problems, you should mark in documentation that this is boolean parameter and for context-defined data sources it should be set to true. This is a common problem. I wish to help novice Struts developers who will face it in the future. So far you were helping me and it is time to start paying back. ;-) Best regards, Konrad Billewicz - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DTOs are evil
On 8/4/05, Laurie Harper [EMAIL PROTECTED] wrote:
The idea of a DTO is to encapsulate the persistence logic so that it can be
independent of the model representation and business logic, and easily
replaceable.
I thought that this is the idea of DAO.
There's nothing saying you can't put an update() method on
your business objects and have it delegate to a DTO but you risk having an
explosion of data access methods on your business objects that way. Since
persistence is typically a quite separate concern from other domain logic,
it makes sense to separate it out.
This I agree with, moving persistence details to DAO is good. But DAO
is not DTO ;-)
Looking up lists of things is sort of a meta-concern; you're right, putting
that on the Employee object would clutter things up, especially when you
start needing more complex queries -- e.g.
getEmployeesEligibleForPerformanceBonus() etc.
If I remeber correctly, EJB encouraged practice like that.
Since these kinds of
operations are a higher level concern (i.e. they aren't operations on
employees but on the entire data class) they should typically live in a
higher layer.
I would prefer other Rick's idea of having another business object
like ListOfEmployess with different finders.
OO generally talks about grouping behaviour and data together, so factoring
out the properties into a separate object would be less OO than factoring
out a sub-set of the behaviour (the CRUD actions). In particular, CRUD
actions are not behaviour of the business object ('save employee object to
the database' is not an operation that makes sense in the context of the
business domain, it's an implementation artifact [speaking broadly]).
That's partly what makes them a good candidate for encapsulating separately.
Agree with that.
I would like to return back to the objects. I still think, that a user
works (at least wants to work) with objects, either with singletons or
with sets of objects. Real-life objects (the ones the user wants to
work with) are represented in the application, and OOP theory is all
about representing real objects with app objects. So, if the modeling
and representaion is done right, we do not need DTOs, because we
already store objects that are of interest for a user.
I can understand the idea of loading only 2 fields out of 20 or
aggregating several objects into one, but I really would not care
unless we loading a set of objects.
So, DTOs are useful where:
* model was done incorrectly
* in cases of really severe bandwidth contstraints
* for sets (lists) of objects
Now what if you have list of objects, and you create another one? If
you use DTOs, you need to save DTO1 to database, and also to create
and insert DTO2 in the list. If you had real object, you just create
it, save it, and add to the list. One object instead of two. Of
course, you can reread the list after you save the object, but this is
unefficient, right?
On the other hand, application design is usually different for
read-only and for read-write applications (classic OLAP vs. OLTP
case).
I am for having persistence separate from business objects, but
factored-out persistence still needs to build proper SQL statement
depending on the object it saves... I am against putting validation
outside of business objects. Validation rules belong to business
objects, imho.
On 8/4/05, Frank W. Zammetti [EMAIL PROTECTED] wrote:
Then I had a special Action base class that worked against an XML file.
So, in keeping with my examples from before, you might see:
action name=action1
function id=1createDTO:ClientDTO/function
function id=2copyActionForm:ClientDTO/function
function
id=3callMethod:ClientHelper.isClientValid(ClientDTO)/function
check sourceid=3
if outcome=falsereturnForward:clientnotvalid/if
/check
function id=4callMethod:ClientFB.saveClient(ClientDTO)/function
check sourceid=4
if outcome=truereturnForward:goodsave/if
if outcome=falsereturnForward:badsave/if
/check
/action
The createDTO, copyActionForm, callMethod and returnForward were standard
commands I could issue. I got it working to this point, never took the
exercise any further...
Hmm, my CRUDAction does almost exactly the same, but it has predefined
list of events (methods) and outcomes.
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Re: {Spam?} help on plugin and i18n
Hi Anoop:
Have you looked at this page:
http://www.systemmobile.com/articles/strutsMessageResources.html
Regards,
Geeta
peeths @struts [EMAIL PROTECTED]
08/04/2005 04:08 PM
Please respond to
Struts Users Mailing List user@struts.apache.org
To
user@struts.apache.org
cc
Subject
{Spam?} help on plugin and i18n
hi all,
i'm new to struts , i just come up with the concept and i would like
to know where i'll get struts plugin for eclipse for jboss server in
linux .
i'm working on internationalization , i deployed an application but
i'm getting an error message in the index.jsp page
javax.servlet.ServletException: Missing message for key app.username
i have defined applicationresources property file and also other
property file , but i'm not able to run the program . what can be the
problem
regards
Anoop
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Displaying a image from a MySQL Blob field
Hello all, I am writing a Struts application which needs to read a database, fetch an image inside a blob field and display it in a JSP page in two different ways: - Within a thumbnail size inside a column of a normal html table. Which means the image needs to be resized for displaying purposes. All images inside this table cannot exceed a maximum height and width in order to have a neat display. - And using the image original size. Hence, I would like to ask if is there any example code on how to accomplish this task. I guess the image size could be configured through html/javascript but what I wonder is how to read from the database and send it to the view component, the JSP page to have it displayed. I appreciate any inputs on this issue. Thanks in advance, C.F. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Displaying a image from a MySQL Blob field
From: C.F. Scheidecker Antunes [EMAIL PROTECTED] I am writing a Struts application which needs to read a database, fetch an image inside a blob field and display it in a JSP page in two different ways: - Within a thumbnail size inside a column of a normal html table. Which means the image needs to be resized for displaying purposes. All images inside this table cannot exceed a maximum height and width in order to have a neat display. - And using the image original size. When you put img src=.../ in an HTML page, the browser will make a separate request to get the image. I would map that request to a plain old Servlet-- there's no reason to tie this to the Struts framework. I do this now for an image that's generated by JFreeChart, but the same thing applies if you're going to retrieve binary data from a database and write it out to the browser. Assuming you already know how to retrieve the image from the database, ask Google about images and servlets: http://www.google.com/search?q=java+image+servlet I would get the full size image retrieval and display working first, then think about how to do the thumbnails. -- Wendy Smoak - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] DTOs are evil
-Ursprüngliche Nachricht- Von: Michael Jouravlev [mailto:[EMAIL PROTECTED] Gesendet: Donnerstag, 4. August 2005 23:27 An: Struts Users Mailing List Betreff: Re: DTOs are evil So, DTOs are useful where: * model was done incorrectly * in cases of really severe bandwidth contstraints * for sets (lists) of objects Sorry, but i can't resist replying. In opposite to the above said, i'd postulate that each software system, which is large enough to be of interest (like in Goedels theorem :-)) , must have DTOs (or ValueObjects) or it was incorrectly modeled. Each software system (which is large enough...) has more then one layer. Different layers usually handles same data. Each of the layers has ist own view on the data. The business layer, which has to calculate the salary of an employee is not interested in employee's persistence capabilities. It's not interested in internal object id (like the one generated by hibernate). The presentation layer is not interested in employee's identity card attribute, but solely in presentation issues, like name or similar. According to the principles of data hiding, a layer should only be able to access data, which it really needs. Therefore, there is no need that the employee object which is used by the presentation layer is the same, which is used by the business layer, and the same which knows everything about underlying persistence capabilities, like oodb, rdb or file system. Therefore the DTO object is the protocol, the language spoken between the layers, and if you want to achieve a layer separation, you need to separate the view from the data. (Olympic ring metaphor by Ted Husted). You may say that the DTO's are not OO, because they only contain state and no behaviour. That's right, but com'on, we are talking about java here, and java isn't a simple OO language, but a component-oriented language, and DTOs are part of the component definition. As for Rod Johnson, he said that DTOs are evil if you don't want to distribute the application (arguable point btw, because i believe we should provide clean application design in any case), but as I said before, we are talking about _LARGE_SYSTEMS and they are 99% distributed. For a HelloWorld applet, or a small address management programm, I probably don't need DTOs. As soon, as I have more then one component - I do. Regards Leon P.S. By the way, Rod Johnson also said persistent objects that contain only getters and setters are evil too (same page as dto, 27). In my understanding it means hibernate and ibatis which use such objects are at least as evil? How are you supposed to represent data anyway then? - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Displaying a image from a MySQL Blob field
Because your dealing with a database, you may want to try the DownloadAction... it will deal with at least some of the details. IIRC, somewhere on the Wiki is an example I wrote of using it specifically returning an object from a database. II-DON'T-RC, ping me, I know I've done it at some point. Frank Wendy Smoak wrote: From: C.F. Scheidecker Antunes [EMAIL PROTECTED] I am writing a Struts application which needs to read a database, fetch an image inside a blob field and display it in a JSP page in two different ways: - Within a thumbnail size inside a column of a normal html table. Which means the image needs to be resized for displaying purposes. All images inside this table cannot exceed a maximum height and width in order to have a neat display. - And using the image original size. When you put img src=.../ in an HTML page, the browser will make a separate request to get the image. I would map that request to a plain old Servlet-- there's no reason to tie this to the Struts framework. I do this now for an image that's generated by JFreeChart, but the same thing applies if you're going to retrieve binary data from a database and write it out to the browser. Assuming you already know how to retrieve the image from the database, ask Google about images and servlets: http://www.google.com/search?q=java+image+servlet I would get the full size image retrieval and display working first, then think about how to do the thumbnails. -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: DTOs are evil
Rick Reumann on 04/08/05 19:12, wrote:
In particular, CRUD actions are not behaviour of the business object
('save employee object to the database' is not an operation that makes
sense in the context of the business domain, it's an implementation
artifact [speaking broadly]). That's partly what makes them a good
candidate for encapsulating separately.
I totally agree, yet this topic seems to come up a lot - where you'll
see people state it's 'better design' and 'adheres more to standard OO'
to do just the opposite (that is add these kind of CRUD methods to the
object in question). I tend to agree that CRUD actions are NOT behaviors
of business objects. For example, if working with Dog objects a save
is much different than say performBark(). Barking, moving, eating
owner's shoes, are behavior of a Dog - I don't see CRUD in the same light.
If a dog must save itself when it changes but cannot have the action as
a behaviour, you immediately accept the necessity of a persistence
layer. Hence Hibernate, EJB CMP, etc and the DAO pattern.
So where does that leave the DTO? By my way of thinking (a dangerous
area indeed most likely) it is still very OO to have a class with
business methods, but where the data is encapsulated within the DTO,
which itself as a whole is a property or an item in a collection, rather
than a whole series of getters, setters and private properties.
But it's getting late so I'm willing to be proved wrong.
Adam
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Re: [OT] DTOs are evil
On 8/4/05, Leon Rosenberg [EMAIL PROTECTED] wrote: Each software system (which is large enough...) has more then one layer. Different layers usually handles same data. Each of the layers has ist own view on the data. The business layer, which has to calculate the salary of an employee is not interested in employee's persistence capabilities. It's not interested in internal object id (like the one generated by hibernate). The presentation layer is not interested in employee's identity card attribute, but solely in presentation issues, like name or similar. According to the principles of data hiding, a layer should only be able to access data, which it really needs. Therefore, there is no need that the employee object which is used by the presentation layer is the same, which is used by the business layer, and the same which knows everything about underlying persistence capabilities, like oodb, rdb or file system. The employee object is employee object, it is the representation of a real-life object. The view of employee object can be different. That is what DTO is, it is a view. Therefore the DTO object is the protocol, the language spoken between the layers, and if you want to achieve a layer separation, you need to separate the view from the data. (Olympic ring metaphor by Ted Husted). You mean, separate view from the business object, not from the data? ;-) Anyway, I am not sure that this separation is needed, unless view layer is developed by an evil third party contractor. You may say that the DTO's are not OO, because they only contain state and no behaviour. That's right, but com'on, we are talking about java here, and java isn't a simple OO language, but a component-oriented language, and DTOs are part of the component definition. As for Rod Johnson, he said that DTOs are evil if you don't want to distribute the application (arguable point btw, because i believe we should provide clean application design in any case), but as I said before, we are talking about _LARGE_SYSTEMS and they are 99% distributed. Rod (or what is Craig or David? I think it was Rod) said that by his assessment, only about 15% of EJB apps are distributed. All other guys simply spent hundreds of man-hours to make app distributable, for no reason. I do not think that this percentage is higher for non-EJB apps. What is really needed for distributed apps is Serializable objects. For a HelloWorld applet, or a small address management programm, I probably don't need DTOs. As soon, as I have more then one component - I do. Regards Leon P.S. By the way, Rod Johnson also said persistent objects that contain only getters and setters are evil too (same page as dto, 27). In my understanding it means hibernate and ibatis which use such objects are at least as evil? How are you supposed to represent data anyway then? If getters and setters do nothing more than simply read field or set field, then they are evil, you do not need Rod Johnson to tell you that ;) Problem with Java that it got a lot of new stuff in 1.5, but it still does not have normal properties like Delphi has or at least like C# has. If a class member could have different access modifiers for read and write, then getters and setters would not be needed in most of cases. Delphi properties rule, Java getters/setters suck, this is for sure. Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] DTOs are evil
Michael Jouravlev wrote: If getters and setters do nothing more than simply read field or set field, then they are evil, you do not need Rod Johnson to tell you that ;) I think I may... why exactly is this evil? We're talking, at the most basic level, about a construct that encapsulates properties of a modeled object behind a (theoretically) well-defined interface. If you do it right you can change details of the implementation without altering client classes. This is all nothing anyone reading this doesn't know of course :) If you mean a class who's accessors and mutators simply do: return this.field; and this.field = field; ...then, while I'm not sure I would call it evil, certainly that isn't using the concept to its full potential. The public interface should also be well-behaved, i.e., should handle incorrect data types and nulls and things like that gracefully. But even that argument seems to me less important than the basic concept of a well-organized data structure to describe some modeled object, and that's what you have even if the methods are doing nothing but like the above. Why anyone would call that evil I don't understand. Care to convince me it is? :) -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] DTOs are evil
On 8/4/05, Frank W. Zammetti [EMAIL PROTECTED] wrote: Michael Jouravlev wrote: If getters and setters do nothing more than simply read field or set field, then they are evil, you do not need Rod Johnson to tell you that ;) I think I may... why exactly is this evil? We're talking, at the most basic level, about a construct that encapsulates properties of a modeled object behind a (theoretically) well-defined interface. If you do it right you can change details of the implementation without altering client classes. This is all nothing anyone reading this doesn't know of course :) If you mean a class who's accessors and mutators simply do: return this.field; and this.field = field; ...then, while I'm not sure I would call it evil, certainly that isn't using the concept to its full potential. Yes, this is exactly what I mean. This is evil. I take that you have not used Object Pascal? It is not just for kiddies. Check this article, for example: http://www.informit.com/articles/printerfriendly.asp?p=26862 === cut here === TCustomEdit = class(TWinControl) private FMaxLength: Integer; protected procedure SetMaxLength(Value: Integer); ... published property MaxLength: Integer read FMaxLength write SetMaxLength default 0; ... end; === cut here === Here TCustomEdit is a component, and MaxLength is a property (it does not have to be published, but if it is, then it automatically shows in IDE property editor). You can define either only getter, or only setter or both. You can map private field directly or use method. You can set default value as well. Indexed properties are supported too. Java 5 got annotations and generics, but still does not have properties, that are easy to use, and could be set from IDE. Oh, right, original Javabean specification has something about that, but getters and setters is all that really left from the spec. Probably because it was not simple enough. Considering the commenting style and how javadoc assign comments to methods and groups them in the help file, one simple Java property is at least half a screen of garbage. Instead I would prefer to have: property MaxLength: Integer read FMaxLength write SetMaxLength default 0; Is this so hard to implement in the compiler? Why anyone would call that evil I don't understand. Care to convince me it is? :) See above ;-) Michael. - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: [OT] DTOs are evil
Michael Jouravlev wrote:
Yes, this is exactly what I mean. This is evil. I take that you have
not used Object Pascal?
I've actually seen it, although I can't say I've personally used it.
property MaxLength: Integer read FMaxLength write SetMaxLength default 0;
There's nothing to stop you from doing:
private Integer MaxLength; public void setMaxLength(Integer MaxLength) {
this.Maxlength = MaxLength; } public Integer getMaxLength() { return
this.MaxLength(); }
Well, nothing except knowing it's a bad style :) And no, I'm not trying
to compare that single OPascal line and this, clearly the Pascal line is
cleaner.
Is this so hard to implement in the compiler?
I certainly wouldn't think so. I'd be willing to bet there is a reason
it hasn't been done before though because I agree it would make a lot of
sense.
Why anyone would call that evil I don't understand. Care to convince me
it is? :)
See above ;-)
I guess I took the word evil quite literally :) I agree what Java
offers in this regard is probably sub-par, but I still think there is
enough value in a class that does the bare minimum, just in terms of
organization, to not want to attach the word evil to it... if you said
non-optimal, I would agree :)
Michael.
Frank
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[OT] The 'Jakarta' of Javascript?
When it comes to server-side Java components and libraries, I generally find most of what I need at Jakarta or elsewhere at Apache; it's certainly one of the first places I always look. Is there a 'Jakarta' of client-side components? Lately I've been keeping my eye out for good Javascript resources, from AJAX frameworks to calendar controls like the one Wendy recently posted a link to [1] to cool visual effects [2] and dynamic UI components [3]. What are your favourite sources for this kind of thing? Do you have any particularly neat examples nestled amongst your bookmarks? L. [1] http://www.dynarch.com/projects/calendar/ [2] http://script.aculo.us/visual-effects [3] http://openrico.org/rico/livegrid.page -- Laurie, Open Source advocate, Java geek and novice blogger: http://www.holoweb.net/laurie http://www.dynarch.com/projects/calendar/ - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Token handling in dispatch Action
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Re: [OT] The 'Jakarta' of Javascript?
www.dynamicdrive.com I don't recall ever actually using anything from that site, I tend to write all my own client-side stuff, but I've very definitely gotten inspiration from some of the stuff there. :) Frank Laurie Harper wrote: When it comes to server-side Java components and libraries, I generally find most of what I need at Jakarta or elsewhere at Apache; it's certainly one of the first places I always look. Is there a 'Jakarta' of client-side components? Lately I've been keeping my eye out for good Javascript resources, from AJAX frameworks to calendar controls like the one Wendy recently posted a link to [1] to cool visual effects [2] and dynamic UI components [3]. What are your favourite sources for this kind of thing? Do you have any particularly neat examples nestled amongst your bookmarks? L. [1] http://www.dynarch.com/projects/calendar/ [2] http://script.aculo.us/visual-effects [3] http://openrico.org/rico/livegrid.page -- Frank W. Zammetti Founder and Chief Software Architect Omnytex Technologies http://www.omnytex.com - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
help on plugin and i18n
hi all, i'm new to struts , i just come up with the concept and i would like to know where i'll get struts plugin for eclipse for jboss server in linux . i'm working on internationalization , i deployed an application but i'm getting an error message in the index.jsp page javax.servlet.ServletException: Missing message for key app.username i have defined applicationresources property file and also other property file , but i'm not able to run the program . what can be the problem regards Anoop - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: {Spam?} help on plugin and i18n
hi Geeta ,
thanx for the link , which u have send me , i'll go through , thanx very much
regards
anoop
On 8/5/05, [EMAIL PROTECTED] [EMAIL PROTECTED] wrote:
Hi Anoop:
Have you looked at this page:
http://www.systemmobile.com/articles/strutsMessageResources.html
Regards,
Geeta
peeths @struts [EMAIL PROTECTED]
08/04/2005 04:08 PM
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{Spam?} help on plugin and i18n
hi all,
i'm new to struts , i just come up with the concept and i would like
to know where i'll get struts plugin for eclipse for jboss server in
linux .
i'm working on internationalization , i deployed an application but
i'm getting an error message in the index.jsp page
javax.servlet.ServletException: Missing message for key app.username
i have defined applicationresources property file and also other
property file , but i'm not able to run the program . what can be the
problem
regards
Anoop
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Re: help on plugin and i18n
u can download MyEclipse (MyEclipse Enterprise Workbench) from Myeclipseside stie. It provides tools for handling struts. For application resource:See if u have configured tag.message-resources in struts_config.xml message-resources parameter=com.yourcompany.struts.ApplicationResources / On Fri, 05 Aug 2005 [EMAIL PROTECTED] wrote : hi all, i'm new to struts , i just come up with the concept and i would like to know where i'll get struts plugin for eclipse for jboss server in linux . i'm working on internationalization , i deployed an application but i'm getting an error message in the index.jsp page javax.servlet.ServletException: Missing message for key app.username i have defined applicationresources property file and also other property file , but i'm not able to run the program . what can be the problem regards Anoop - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: Upload multiple files at once
Lionel cooll at free.fr writes: Deepak wrote: Hi, Is there a way to upload multiple files at once ? Zip them before. hi u can take multiple FormFile in the form and u can do, i have tried and i got, - To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Custom Validation doesn't add
Hi,
I ran into a strange problem with the validation of form input that
includes an uploaded file in Struts 1.2.7. I wrote a custom validation
method for validating the file size of an uploaded file:
public static boolean validateFile(Object bean,
ValidatorAction validatorAction,
Field field,
ActionMessages messages,
Validator validator,
HttpServletRequest request) {
Object o =
request.getAttribute(MultipartRequestHandler.ATTRIBUTE_MAX_LENGTH_EXCEEDED);
Boolean fileLengthExceeded = (Boolean) o;
if ((fileLengthExceeded != null) fileLengthExceeded.booleanValue()) {
messages.add(field.getKey(),
Resources.getActionMessage(request, validatorAction,
field));
return false;
}
return true;
}
I defined a validation rule in my validator-rules.xml:
validator name=fileSize
classname=org.uba.iuclidx.gui.web.struts.validators.FormValidator
method=validateFile
methodParams=java.lang.Object,
org.apache.commons.validator.ValidatorAction,
org.apache.commons.validator.Field,
org.apache.struts.action.ActionMessages,
org.apache.commons.validator.Validator,
javax.servlet.http.HttpServletRequest
msg=errors.maxLengthFileExceeded/
And I added an entry for the form to be validated in validation.xml
form name=iuclidExportForm
field property=casNo depends=required
msg name=required key=casNo.required/
/field
field property=blockTableNames depends=required
msg name=required key=blockTableNames.required/
/field
field property=mapDescrFile depends=required,fileSize
msg name=required key=mapDescrFile.required/
msg name=fileSize key=maxLengthMapDescrFileExceeded/
/field
/form
Everything works fine, and the method is called. But if the file exceeds
the file size defined in the controller element of struts-config.xml, I
get the error messages of all fields for the required validation rule
(including the file upload field!), but not the one for exceeding the
file size. Additionally the fields contain no more values. As if the
form has been reset after executing validateFile and then validated
again.
Any ideas or hints?
Thanks in advance.
Franz
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Re: [OT] My O'Reilly Open Source Conference Talk
Adam Hardy wrote: Craig McClanahan on 03/08/05 23:10, wrote: I just uploaded the slides from my OSCON talk this afternoon, comparing several web frameworks on how they implement six major architectural features. Several people have asked for them, so here's a link: http://people.apache.org/~craigmcc/oscon_2005_web_architectures.pdf Can I summarise in a slightly Friday manner :) (1) Struts: v1.3 should be better, in fact there are at least 5 major points that need addressing (2) Webwork: kind of weird, has Actions but has unknowns like XWork, interceptor stacks, OGNL (3) Spring MVC: totally flexible, configurable, wide variety of implementations - everything to everybody. Sounds like it can make coffee too. Good if you love XML config files. This is kind of a breezy and under-informed synopsis. Spring Web MVC is about the same in terms of XML configuration as Struts, but it has back-end infrastructure and really clean good design, both of which Struts lack. Instead of being everything to everybody, it's exactly what people like us (and thousands of others) need. If you're still stuck on Struts like we were, why? It's 2005, and Struts is now O-L-D and it hasn't aged especially well. Spring turns out a much better solution for most web applications than Struts. To summarize more meaningfully, the primary benefits of Spring compared with Struts and other solutions are: 1. Spring is a much more complete application framework providing persistence infrastructure, AOP, lightweight container, etc. in addition to web MVC. 2. Spring is non-invasive and is a pick-and-choose framework. It provides just about everything most people need, but you only have to learn about and use the things YOU need/want. 3. Spring is the right solution for those among us who are tired of being their own integrator. With Spring, the infrastructure is already integrated and so this is a significant time saver for many projects. 4. Spring is a first-principles design framework. It was very carefully and very elegantly designed from the ground up by Rod Johnson and Juergen Hoeller. If you are even a little bit careful, these ideas will permeate your own application. And these are great ideas. So when you build a Spring application correctly you end up with something that is an intrinsically better and therefore more long-lasting and flexible piece of software. Regards, craig vanderborgh (4) Tapestry: even weirder than Webwork, and you don't get to use JSPs, you have to write your HTML like ColdFusion (5) JSF: obviously the dog's gonads - 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]
[OT] What to choose: Struts, JSF, Shale or Spring
Hi Gurus, Sorry for the OT. I have been working on jsp/servlets for a last four years to create web pages. Now that I have found out there is more out there, I am in a dilemma. Which one should I learn and why? I have a big web project coming up and was wondering which of these I should choose to work on. This project needs good validation and object relational or sql mapping (hibernate or ibatis). If you have any books or site links to name, please let me know. Thanks, Bob - Start your day with Yahoo! - make it your home page
