from:"Frank W. Zammetti"

On Wed, October 31, 2007 10:19 am, Ingo Villnow wrote:
 i want to call an action by javascript, when a value in a html:select
 field changes. I want to fill my html:form with the data provided by
 the action. Any ideas? I don't know a lot of javascript :-(

There's a couple if ways you could do that... one would be to call the
submit() method of the form object, which every form in HTML has, then
re-render the page with the updated data in the form.  That's of course
going to refresh the entire page, which I suspect isn't what you want.

So, AJAX is probably what you want.  Now, how you go about doing that,
well, there's a few hundred options :)  Because you don't know a lot of
Javascript, you might want to consider the AjaxParts Taglib (APT) from
Java Web Parts (JWP):

http://javawebparts.sourceforge.net

Direct to APT:

http://javawebparts.sourceforge.net/javadocs/javawebparts/ajaxparts/taglib/package-summary.html

If you go to the download page, the cookbook has some examples that are
very much along the lines of what you're asking for.  If you go that
route, we'll be more than happy on the JWP mailing list, or forums.

Otherwise, prototype (http://www.prototypejs.org) is a good, simple
option, but you will be writing some Javascript.

 thanks  greetings from Berlin

hth,
Frank


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Re: struts 1.2: calling an action by javascript

On Wed, October 31, 2007 10:19 am, Ingo Villnow wrote:
 i want to call an action by javascript, when a value in a html:select
 field changes. I want to fill my html:form with the data provided by
 the action. Any ideas? I don't know a lot of javascript :-(

There's a couple if ways you could do that... one would be to call the
submit() method of the form object, which every form in HTML has, then
re-render the page with the updated data in the form.  That's of course
going to refresh the entire page, which I suspect isn't what you want.

So, AJAX is probably what you want.  Now, how you go about doing that,
well, there's a few hundred options :)  Because you don't know a lot of
Javascript, you might want to consider the AjaxParts Taglib (APT) from
Java Web Parts (JWP):

http://javawebparts.sourceforge.net

Direct to APT:

http://javawebparts.sourceforge.net/javadocs/javawebparts/ajaxparts/taglib/package-summary.html

If you go to the download page, the cookbook has some examples that are
very much along the lines of what you're asking for.  If you go that
route, we'll be more than happy on the JWP mailing list, or forums.

Otherwise, prototype (http://www.prototypejs.org) is a good, simple
option, but you will be writing some Javascript.

 thanks  greetings from Berlin

hth,
Frank


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Re: struts 1.2: calling an action by javascript

I should also point out the presentation Ted Husted did at The Ajax
Experience last week which dealt largely with APT. The slides for that
presentation are here:

http://ajaxexperience.techtarget.com/images/Presentations/Husted_Ted_RetrofittingStruts.pdf

I'm not quite sure how long they will stay posted there though, so get it
while it's hot :)

Frank

On Wed, October 31, 2007 10:48 am, Frank W. Zammetti wrote:
On Wed, October 31, 2007 10:19 am, Ingo Villnow wrote:
i want to call an action by javascript, when a value in a html:select
field changes. I want to fill my html:form with the data provided by
the action. Any ideas? I don't know a lot of javascript :-(

There's a couple if ways you could do that... one would be to call the
submit() method of the form object, which every form in HTML has, then
re-render the page with the updated data in the form. That's of course
going to refresh the entire page, which I suspect isn't what you want.

So, AJAX is probably what you want. Now, how you go about doing that,
well, there's a few hundred options :) Because you don't know a lot of
Javascript, you might want to consider the AjaxParts Taglib (APT) from
Java Web Parts (JWP):

http://javawebparts.sourceforge.net

Direct to APT:

http://javawebparts.sourceforge.net/javadocs/javawebparts/ajaxparts/taglib/package-summary.html

If you go to the download page, the cookbook has some examples that are
very much along the lines of what you're asking for. If you go that
route, we'll be more than happy on the JWP mailing list, or forums.

Otherwise, prototype (http://www.prototypejs.org) is a good, simple
option, but you will be writing some Javascript.

thanks greetings from Berlin

hth,
Frank

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Re: struts 1.2: calling an action by ajax (javawebparts)

Can you tell where that error is coming from? I don't recognize it as
an APT error, so I'm guessing Struts, but I don't recall ever seeing
that before.

You know what... what happens if you remove the ?xml and !DOCTYPE
tags? Does it work then?

Frank

Ingo Villnow wrote:

ok, the Text in the index-result is working now, but i want to use the
actions and when i use parameters like
/employee.do?task=updateajax=getEmployee then there comes an error
message The reference to entity ajax must end with the ';' delimiter.

Ingo Villnow schrieb:

Hello,

now i am using the javawebparts.ajaxparts and when i put all the things
in a whole jsp-site, than the ajax is working:

%@ taglib prefix=ajax uri=javawebparts/ajaxparts/taglib %
?xml version=1.0 encoding=ISO-8859-1 ?
%@ page language=java contentType=text/html; charset=ISO-8859-1
pageEncoding=ISO-8859-1%
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd;
html xmlns=http://www.w3.org/1999/xhtml;
head
meta http-equiv=Content-Type content=text/html; charset=ISO-8859-1 /
titleInsert title here/title
/head
body
form action=#
input id=btn type=button value=TESTBUTTON/ajax:event
ajaxRef=employee/update attachTo=btn/
/form
div id=result-div

/div
ajax:enable/
/body
/html

But when i am using it with struts-tiles than it doesn't work :-( - i
think that's because the target in the ajax-config is not found. I don't
now why. Without tiles, the target
will be found. The index-result.txt is in the same directory as the
jsp-site.

ajaxConfig
group ajaxRef=employee
element ajaxRef=update
event type=onclick
requestHandler type=std:SimpleRequest
target=index-result.txt
parameter /
/requestHandler
responseHandler type=std:InnerHTML
parameterresult-div/parameter
/responseHandler
/event
/element
/group
/ajaxConfig

When i use an action as a target, it doesn't work, too (e.g.
target=action.do?parameter=xxxparam2=yyy). I use the DispatchAction,
so with the parameter I can delegate or specifiy the method, which will
be called in my action...

Any ideas?

Thank's a lot!!

Greetings from Berlin

Frank W. Zammetti schrieb:

I should also point out the presentation Ted Husted did at The Ajax
Experience last week which dealt largely with APT. The slides for that
presentation are here:

http://ajaxexperience.techtarget.com/images/Presentations/Husted_Ted_RetrofittingStruts.pdf

I'm not quite sure how long they will stay posted there though, so get it
while it's hot :)

Frank

On Wed, October 31, 2007 10:48 am, Frank W. Zammetti wrote:

On Wed, October 31, 2007 10:19 am, Ingo Villnow wrote:

i want to call an action by javascript, when a value in a html:select
field changes. I want to fill my html:form with the data provided by
the action. Any ideas? I don't know a lot of javascript :-(

http://javawebparts.sourceforge.net

Direct to APT:

http://javawebparts.sourceforge.net/javadocs/javawebparts/ajaxparts/taglib/package-summary.html

Otherwise, prototype (http://www.prototypejs.org) is a good, simple
option, but you will be writing some Javascript.

thanks greetings from Berlin

hth,
Frank

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No virus found in this incoming message.
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Version: 7.5.503 / Virus Database: 269.15.14/1100 - Release Date: 10/30/2007 6:26 PM

--
--
Frank W. Zammetti
Founder and Chief Software Architect

Re: struts 1.2: calling an action by ajax (javawebparts)

I would suggest joining the JWP mailing list and re-posting this
question there... the form manipulator handler was written by a member
of the JWP team named Herman, and I know he'd be able to help you out
quickly. I think though that there is an example of that handler in the
JWP sample application that comes with the distribution, if memory
serves, you may want to check that out first. If it's no help, moving
to the JWP mailing list would probably be a good idea at this point
since this isn't so much Struts-related any more.

Frank

Ingo Villnow wrote:

I referred to the manual and there it suggested to use parameter
instead, like this:

requestHandler type=std:QueryString
target=/ajax.do
parametervalue=name/parameter
/requestHandler

then you can use: String value = (String) request.getParameter(value);

Now i have another problem :-)) I want to use the std:FormManipulator
als ResponseHandler, but I have problems with the correct
XML-Response-Format and i don't find any code example for that.
I am generating the form by using the struts-tags html:form,html:txt
and so on. And with the FormManipulator i think i can manipulate the
generated form.

The other way maybe is that i generate my form like html type=text
value=% . % after the ajax:event called my action and my
action puts me a bean into the request.

Greetings, Ingo

Frank W. Zammetti schrieb:

Can you tell where that error is coming from? I don't recognize it as
an APT error, so I'm guessing Struts, but I don't recall ever seeing
that before.

You know what... what happens if you remove the ?xml and !DOCTYPE
tags? Does it work then?

Frank

Ingo Villnow wrote:

Ingo Villnow schrieb:

Hello,

now i am using the javawebparts.ajaxparts and when i put all the things
in a whole jsp-site, than the ajax is working:

%@ taglib prefix=ajax uri=javawebparts/ajaxparts/taglib %
?xml version=1.0 encoding=ISO-8859-1 ?
%@ page language=java contentType=text/html; charset=ISO-8859-1
pageEncoding=ISO-8859-1%
!DOCTYPE html PUBLIC -//W3C//DTD XHTML 1.0 Transitional//EN
http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd;
html xmlns=http://www.w3.org/1999/xhtml;
head
meta http-equiv=Content-Type content=text/html;
charset=ISO-8859-1 /
titleInsert title here/title
/head
body
form action=#
input id=btn type=button value=TESTBUTTON/ajax:event
ajaxRef=employee/update attachTo=btn/
/form
div id=result-div

/div
ajax:enable/
/body
/html

But when i am using it with struts-tiles than it doesn't work :-( - i
think that's because the target in the ajax-config is not found. I
don't
now why. Without tiles, the target
will be found. The index-result.txt is in the same directory as the
jsp-site.

Any ideas?

Thank's a lot!!

Greetings from Berlin

Frank W. Zammetti schrieb:

I should also point out the presentation Ted Husted did at The Ajax
Experience last week which dealt largely with APT. The slides for
that
presentation are here:

http://ajaxexperience.techtarget.com/images/Presentations/Husted_Ted_RetrofittingStruts.pdf

I'm not quite sure how long they will stay posted there though, so
get it
while it's hot :)

Frank

On Wed, October 31, 2007 10:48 am, Frank W. Zammetti wrote:

On Wed, October 31, 2007 10:19 am, Ingo Villnow wrote:

i want to call an action by javascript, when a value in a
html:select
field changes. I want to fill my html:form with the data
provided by
the action. Any ideas? I don't know a lot of javascript :-(

There's a couple if ways you could do that... one would be to call
the
submit() method of the form object, which every form in HTML has,
then
re-render the page with the updated data in the form. That's of
course
going to refresh the entire page, which I suspect isn't what you
want.

So, AJAX is probably what you want. Now, how you go about doing
that,
well, there's a few hundred options :) Because you don't know a
lot of
Javascript, you might want to consider the AjaxParts Taglib (APT)
from
Java Web Parts (JWP):

http://javawebparts.sourceforge.net

Direct to APT

Re: Ajax Call from a html link

2007-10-10 Thread Frank W. Zammetti

Just an FYI, that article is a little outdated... APT's feature set is a
bit larger than the article talks about now for one thing, although in
glancing over it again, I don't see anything that's not applicable now.

Also note that the link to Rick Reumann's article is no longer valid, it
is now here:
http://www.learntechnology.net/content/ajax/ajax_select_alter.jsp ... Rick
also updated that article for APT fairly recently, so it's even better
than it was.

Lastly, I didn't provide a link to my own book in that article!  D'oh! 
Here's one: http://apress.com/book/search?searchterm=zammettiact=search
...
chapters 4 and 6 there are what's of interest, although as the note in the
article says, they aren't based on the latest version, so although the
underlying concepts are pretty much the same, some of the details are
slightly different now.

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, October 10, 2007 12:50 pm, Ted Husted wrote:
 I believe this exact example is included with the AjaxParts Taglib,
 which works well with Struts (1 or 2). If anyone is going to be using
 Ajax and JSP tags together, AjaxParts is a great way to go  (and easy
 to learn!).

  * http://www.omnytex.com/articles/apt/

 HTH, Ted.
 http://husted.com/ted/blog


 On 10/10/07, aarthy [EMAIL PROTECTED] wrote:

 I have a jsp page named tvshow.jsp, wherein I am populating the
 characters
 dropdown as and when the TV Show dropdown value changes , by calling the
 javascript in the onchange() of the select box.
 have added a html link, and I want to call the same function from my
 action
 class and I need to populate the character dropdown by clicking the html
 link. I am stuck up with this issue.Character dropdown is not populated
 with
 the data from tha action class. Need some help on this please!

 %@ page import=java.util.*%
 %@ taglib uri=http://struts.apache.org/tags-html; prefix=html %
 %@ taglib uri=http://struts.apache.org/tags-logic; prefix=logic %
 script language=javascript
  function retrieveURL(url) {
 if (window.XMLHttpRequest) { // Non-IE browsers
   req = new XMLHttpRequest();
   req.onreadystatechange = processStateChange;
   try {
 req.open(GET, url, true);

   } catch (e) {
 alert(e);
   }
   req.send(null);
 } else if (window.ActiveXObject) { // IE
   req = new ActiveXObject(Microsoft.XMLHTTP);
   if (req) {
 req.onreadystatechange = processStateChange;
 req.open(GET, url, true);
 req.send();

   }
 }
   }

   function processStateChange() {
 if (req.readyState == 4) { // Complete
   if (req.status == 200) { // OK response
 document.getElementById(characters).innerHTML =
 req.responseText;
 } else {
 alert(Problem:  + req.statusText);
   }
 }
   }

 /script


 form action=ShowCharacters
 /jsp/tvshow.jsp Click here

 TV Show:
 select name=TVShowSelect
 onChange=retrieveURL('ShowCharacters.do?tvShow=' + this.value);
 option value=Lissie Maguire Lissie Maguire /option
 option value=That's so Raven That's so Raven
 /option
 option value=Dhoom machale Dhoom machale
 /option
 /select

 br
 Characters:
 /form

 ShowCharacters.jsp

 [EMAIL PROTECTED] import=java.util.ArrayList%

 %@ taglib uri=http://struts.apache.org/tags-bean; prefix=bean %
 %@ taglib uri=http://struts.apache.org/tags-html; prefix=html %
 %@ taglib uri=http://struts.apache.org/tags-logic; prefix=logic %

 select name=TVShowSelect
 %  ArrayList ch =
 (ArrayList)request.getSession().getAttribute(characters);
 String[] s = new String[ch.size()];
 ch.toArray(s);
 for (int i = 0; i  s.length; i++) {
 String name = s[i];
 %
 option%=name%/option
 %  }
 %
 /select

 Thanks

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RE: Ajax Call from a html link

2007-10-10 Thread Frank W. Zammetti

You already have the code, you posted it! :)  If you're having some
*specific* problem, you'll find many helpful people here, but just saying
my code doesn't work, please help won't elicit too many (helpful)
replies.

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, October 10, 2007 3:13 pm, aarthy wrote:

 Can someone  provide me with an example code.I need to implement ajax in
 my
 struts project, when html link is clicked.



 ghodgins wrote:

 Not to detract at all from the great JWP project but you can also do
 this with AjaxTags.

 The ajax:select tag is described here:
 http://ajaxtags.sourceforge.net/usage.html

 I used ajax:select to call an action that returned XML using the handy
 AjaxXmlBuilder that came with AjaxTags.

 Cheers,
 Grant


 -Original Message-
 From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, October 10, 2007 11:31 AM
 To: Struts Users Mailing List
 Cc: Struts Users Mailing List
 Subject: Re: Ajax Call from a html link

 Just an FYI, that article is a little outdated... APT's feature set is a
 bit larger than the article talks about now for one thing, although in
 glancing over it again, I don't see anything that's not applicable now.

 Also note that the link to Rick Reumann's article is no longer valid, it
 is now here:
 http://www.learntechnology.net/content/ajax/ajax_select_alter.jsp ...
 Rick also updated that article for APT fairly recently, so it's even
 better than it was.

 Lastly, I didn't provide a link to my own book in that article!  D'oh!
 Here's one: http://apress.com/book/search?searchterm=zammettiact=search
 ...
 chapters 4 and 6 there are what's of interest, although as the note in
 the article says, they aren't based on the latest version, so although
 the underlying concepts are pretty much the same, some of the details
 are slightly different now.

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

 On Wed, October 10, 2007 12:50 pm, Ted Husted wrote:
 I believe this exact example is included with the AjaxParts Taglib,
 which works well with Struts (1 or 2). If anyone is going to be using
 Ajax and JSP tags together, AjaxParts is a great way to go  (and easy
 to learn!).

  * http://www.omnytex.com/articles/apt/

 HTH, Ted.
 http://husted.com/ted/blog


 On 10/10/07, aarthy [EMAIL PROTECTED] wrote:

 I have a jsp page named tvshow.jsp, wherein I am populating the
 characters dropdown as and when the TV Show dropdown value changes ,
 by calling the javascript in the onchange() of the select box.
 have added a html link, and I want to call the same function from my
 action class and I need to populate the character dropdown by
 clicking the html link. I am stuck up with this issue.Character
 dropdown is not populated with the data from tha action class. Need
 some help on this please!

 %@ page import=java.util.*%
 %@ taglib uri=http://struts.apache.org/tags-html; prefix=html %
 %@ taglib uri=http://struts.apache.org/tags-logic; prefix=logic
 % script language=javascript  function retrieveURL(url) {
 if (window.XMLHttpRequest) { // Non-IE browsers
   req = new XMLHttpRequest();
   req.onreadystatechange = processStateChange;
   try {
 req.open(GET, url, true);

   } catch (e) {
 alert(e);
   }
   req.send(null);
 } else if (window.ActiveXObject) { // IE
   req = new ActiveXObject(Microsoft.XMLHTTP);
   if (req) {
 req.onreadystatechange = processStateChange;
 req.open(GET, url, true);
 req.send();

   }
 }
   }

   function processStateChange() {
 if (req.readyState == 4) { // Complete
   if (req.status == 200) { // OK response
 document.getElementById(characters).innerHTML =
 req.responseText;
 } else {
 alert(Problem:  + req.statusText);
   }
 }
   }

 /script


 form action=ShowCharacters
 /jsp/tvshow.jsp Click here

 TV Show:
 select name=TVShowSelect
 onChange=retrieveURL('ShowCharacters.do?tvShow=' + this.value);
 option value=Lissie Maguire Lissie Maguire
 /option
 option value=That's so Raven That's so
 Raven /option
 option

RE: Ajax Call from a html link

2007-10-10 Thread Frank W. Zammetti

Well, what debugging have you attempted?  Are you running in Firefox with
Firebug for instance and seeing some client-side error?  Have you verified
that your Action is getting called?  Have you examined the returned data
to ensure it's correct?

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, October 10, 2007 3:30 pm, aarthy wrote:

 In my code

  /jsp/tvshow.jsp Click here 
 when the html link is clicked, it  does not populate the second drop down
 box with values.
 I dont know what the problem is?



 Frank W. Zammetti wrote:

 You already have the code, you posted it! :)  If you're having some
 *specific* problem, you'll find many helpful people here, but just
 saying
 my code doesn't work, please help won't elicit too many (helpful)
 replies.

 Frank

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

 On Wed, October 10, 2007 3:13 pm, aarthy wrote:

 Can someone  provide me with an example code.I need to implement ajax
 in
 my
 struts project, when html link is clicked.



 ghodgins wrote:

 Not to detract at all from the great JWP project but you can also do
 this with AjaxTags.

 The ajax:select tag is described here:
 http://ajaxtags.sourceforge.net/usage.html

 I used ajax:select to call an action that returned XML using the handy
 AjaxXmlBuilder that came with AjaxTags.

 Cheers,
 Grant


 -Original Message-
 From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, October 10, 2007 11:31 AM
 To: Struts Users Mailing List
 Cc: Struts Users Mailing List
 Subject: Re: Ajax Call from a html link

 Just an FYI, that article is a little outdated... APT's feature set is
 a
 bit larger than the article talks about now for one thing, although in
 glancing over it again, I don't see anything that's not applicable
 now.

 Also note that the link to Rick Reumann's article is no longer valid,
 it
 is now here:
 http://www.learntechnology.net/content/ajax/ajax_select_alter.jsp ...
 Rick also updated that article for APT fairly recently, so it's even
 better than it was.

 Lastly, I didn't provide a link to my own book in that article!  D'oh!
 Here's one:
 http://apress.com/book/search?searchterm=zammettiact=search
 ...
 chapters 4 and 6 there are what's of interest, although as the note in
 the article says, they aren't based on the latest version, so although
 the underlying concepts are pretty much the same, some of the details
 are slightly different now.

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

 On Wed, October 10, 2007 12:50 pm, Ted Husted wrote:
 I believe this exact example is included with the AjaxParts Taglib,
 which works well with Struts (1 or 2). If anyone is going to be using
 Ajax and JSP tags together, AjaxParts is a great way to go  (and easy
 to learn!).

  * http://www.omnytex.com/articles/apt/

 HTH, Ted.
 http://husted.com/ted/blog


 On 10/10/07, aarthy [EMAIL PROTECTED] wrote:

 I have a jsp page named tvshow.jsp, wherein I am populating the
 characters dropdown as and when the TV Show dropdown value changes ,
 by calling the javascript in the onchange() of the select box.
 have added a html link, and I want to call the same function from my
 action class and I need to populate the character dropdown by
 clicking the html link. I am stuck up with this issue.Character
 dropdown is not populated with the data from tha action class. Need
 some help on this please!

 %@ page import=java.util.*%
 %@ taglib uri=http://struts.apache.org/tags-html; prefix=html %
 %@ taglib uri=http://struts.apache.org/tags-logic; prefix=logic
 % script language=javascript  function retrieveURL(url) {
 if (window.XMLHttpRequest) { // Non-IE browsers
   req = new XMLHttpRequest();
   req.onreadystatechange = processStateChange;
   try {
 req.open(GET, url, true);

   } catch (e) {
 alert(e

Re: [OT] Ajax recommendations for use with Struts1.1

2007-10-03 Thread Frank W. Zammetti

I plan on using extjs for the last chapter of the book I'm currently
writing as it impressed me quite a bit as well... I won't be using the
AJAX functionality, but as far as widgets go, looks very promising.

To Ted's point though, I haven't checked out the source code... YUI
absolutely has some of the most well-written Javascript you'll find
anywhere... I consider myself quite competent in client-side coding, but
there are some libraries out there that I've had to hack that give me a
headache trying to follow, but YUI doesn't suffer from that in the least. 
Clean, well-documented, as Ted said, a pleasure to deal with whether you
have to modify it or not (I do wish the widgets were more full-featured
and, frankly, cooler-looking, but there's something to be said for
simplicity too).

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, October 3, 2007 11:35 am, Rick Reumann wrote:
 On 10/3/07, Ted Husted [EMAIL PROTECTED] wrote:

 Just to chime in late ... an Ajax library that does well the sort of
 things Frank is describing is the Yahoo User Interface (YUI) Library.
 Reading the source for the YUI library is an absolute pleasure!

 Thanks Ted, I'll have to check that out. Right now, I was thinking of
 going with extjs for some things. http://extjs.com/  Pretty neat
 stuff.

 Going to check out YUI now.

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[Tangential] Re: [s2] Struts head tag KILLS ( 10s) page load time

If you're not going to use the built-in AJAX support in S2, you may also
want to have a look at AjaxParts Taglib (APT):

http://javawebparts.sourceforge.net/javadocs/javawebparts/ajaxparts/taglib/package-summary.html

... which is a component of Java Web Parts (JWP):

http://javawebparts.sourceforge.net

The JWP example app demonstrates APT pretty thoroughly.

I know some folks use APT with S1 and like it, and it should work just
as well with S2 (assuming you're using JSPs I suppose). I could see
making this an S2 plug-in if there was some interest in that, I've had
that thought before.

Frank

Haroon Rafique wrote:

On Yesterday at 11:25pm, VR=Van Riper [EMAIL PROTECTED] wrote:

VR [..snip..]
VR
VR The best workaround that I have found is to Just Say NO to the built
VR in support for Dojo and instead to use Prototype judiciously. All my
VR ajax logic is done that way. I don't use the builtin ajax support in
VR s2 at all. This has worked well for the level of ajax support I need
VR in my own webapp development these days. YMMV.
VR
VR -Van
VR
VR

I'll say amen to that and second the advice.

I don't use the builtin s2 ajax support either. Instead, I use prototype
for Ajax requests and use dexagogo/prototype for client-side validation.

Cheers,
--
Haroon Rafique
[EMAIL PROTECTED]

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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!

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Re: [Tangential] Re: [s2] Struts head tag KILLS ( 10s) page load time

I'll see if I can find some time this weekend... the only thing that's 
really stopped me in the past when I thought of it is that it's really 
so darned easy to drop in manually (two added JAR files, one config file 
and one context param in web.xml), there's almost no benefit to it being 
a plug-in that I can see (nor am I 100% sure it can be at this point... 
can I set context params somehow from a plug-in?)... other than having 
it available in one place with all the other plug-ins, which would be a 
little more convenient.


But I'll go ahead and see if I can do it over the next 2-3 days... I 
should probably bump the DataVision plug-in to 1.0 anyway, it appears 
stable enough at this point.  Might as well do all the plug-in work 
together!


Frank

Musachy Barroso wrote:

 I could see

making this an S2 plug-in if there was some interest in that, I've had
that thought before.



That would be a pretty good idea :)

musachy

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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [Tangential] Re: [s2] Struts head tag KILLS ( 10s) page load time

I agree, and that's the thought that stopped me from doing this in the 
past.  I do think it would be nice to bring APT to a wider audience, and 
making it a plug-in would probably give it more exposure and have that 
effect, but it's not the best reason to do something like this.  I may 
still do it if I can find the time, but it's not a priority in any way. 
 Thanks Musachy!


Frank

Musachy Barroso wrote:

If you don't have plugin anything, there isn't any real benefit to
it, but I haven't looked at JWP.

musachy

On 9/21/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

I'll see if I can find some time this weekend... the only thing that's
really stopped me in the past when I thought of it is that it's really
so darned easy to drop in manually (two added JAR files, one config file
and one context param in web.xml), there's almost no benefit to it being
a plug-in that I can see (nor am I 100% sure it can be at this point...
can I set context params somehow from a plug-in?)... other than having
it available in one place with all the other plug-ins, which would be a
little more convenient.

But I'll go ahead and see if I can do it over the next 2-3 days... I
should probably bump the DataVision plug-in to 1.0 anyway, it appears
stable enough at this point.  Might as well do all the plug-in work
together!

Frank

Musachy Barroso wrote:

 I could see

making this an S2 plug-in if there was some interest in that, I've had
that thought before.


That would be a pretty good idea :)

musachy

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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

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Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Spring tutorial

I echo Dave's sentiment, but you need to determine what your data access 
needs are before deciding one way or another.


Many people really like the ORM approach using something like Hibernate. 
 Others like pure JDBC, or at least *close* to pure JDBC, which is an 
area Spring can help in (it can help with Hibernate too as I understand 
it, but I have no experience there).  Still others like something 
*roughly* in between like iBatis.


If you have an existing database, my experience is that you might be 
better off going closer to the pure JDBC approach.  I've found that 
using Hibernate (and I presume any ORM tool) with an existing database 
can *sometimes* lead to frustrations and designs that aren't as good as 
they otherwise could be.  This in no way is saying you *can't* use 
Hibernate with existing databases, of course you can, but it may not be 
the best choice.


If your starting with no database, I think it probably comes down more 
to philosophy than anything else.  If you'd like to make your database 
model your domain objects, then something like Hibernate will probably 
serve you well.  If you prefer to hammer out the database schema first 
and develop the app to consume it, you may want to go the other way.


I'm always a little concerned using Hibernate and similar tools because 
I've never been convinced they perform as well as getting closer to the 
metal allows you to.  I'm not a fan, in *most* cases, of trusting tools 
to essentially write code for me, which SQL is a form of IMO.  Still, 
I've used Hibernate a few times and had success with it, so it can't be 
that bad, can it?? :)  Still, if I was writing a high-volume 
transactional system, I think I'd be leaning away from an ORM package, 
so it comes down to my first sentence: determine what your needs really 
are first, then look at the alternatives.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

rama krishna yalagandula wrote:

--=_Part_42524_19997682.1190414900433
Mime-Version: 1.0
Content-Transfer-Encoding: 7bit
Content-Type: text/plain; charset=ISO-8859-1
Content-Disposition: inline

Hi,

  I am new to struts 2.0.9 ... Earlier I worked on oracle Developer Tools ..
Now we have to migrate From Oracle to Java Struts  I need to connect to
database several times so do I need to use Spring Frame Work(as I heared
from my supervisor)
Thanks in advance
Regards
Rama...

--=_Part_42524_19997682.1190414900433--






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Re: [s2] Struts head tag KILLS ( 10s) page load time

2007-09-20 Thread Frank W. Zammetti

If Dojo is being used for AJAX in this case, that's my guess.  I know 
from experience that Dojo, can issue a TON of requests even if you think 
your only loading a small portion of it.  Assuming this guess is 
correct, Musachy, does S2 use a custom build of Dojo?  If not, that 
might be worth considering.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

chengas123 wrote:

Hi,
I am working on a Struts 2 page and page load times are way too high.  I
tracked it down to the Struts head tag, which I have as follows: s:head
theme=ajax /
Without the tag, my page issues 3 requests and takes 453ms to load.  With
the tag, the page issues 54 requests taking 12.24s to load.  
Is there something I am doing wrong here?


Thanks,
Ben



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Re: [s2] Struts head tag KILLS ( 10s) page load time

2007-09-20 Thread Frank W. Zammetti

The OP should try that cache=true setting first obviously... I'd be 
surprised if that didn't get rid of all the requests... we had exactly 
the same experience in my current project, even though we're not using 
S2, and we found the custom build solved the problem (in addition to 
caching static content like JS files on the web server, but that's 
something else).


Frank

Don Brown wrote:

Musachy, has this been fixed in 2.1?  Are the number of requests
happening because we are using Dojo's lazy import feature?

Don

On 9/21/07, Musachy Barroso [EMAIL PROTECTED] wrote:

Only on 2.1 Frank, if you set cache=true it will use a custom build
that includes the files needed by the S2 widgets. The first download
will be big but it will be cached by the browser.

To the OP: Are you using ajax? if not, don't set theme=ajax on head.

regards
musachy

On 9/20/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

If Dojo is being used for AJAX in this case, that's my guess.  I know
from experience that Dojo, can issue a TON of requests even if you think
your only loading a small portion of it.  Assuming this guess is
correct, Musachy, does S2 use a custom build of Dojo?  If not, that
might be worth considering.

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

chengas123 wrote:

Hi,
I am working on a Struts 2 page and page load times are way too high.  I
tracked it down to the Struts head tag, which I have as follows: s:head
theme=ajax /
Without the tag, my page issues 3 requests and takes 453ms to load.  With
the tag, the page issues 54 requests taking 12.24s to load.
Is there something I am doing wrong here?

Thanks,
Ben


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--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [OT] Ajax recommendations for use with Struts1.1

2007-09-19 Thread Frank W. Zammetti


Hi Rick,

AjaxParts is still a good alternative, especially given your past 
experience.  It's still very much alive, and probably even a bit better 
than the last time you used it.


As Adam said, DWR is another alternative I think very highly of as well 
(highly enough to be nearing completion of a book about it).


We've used Dojo at work with good success, although I've always had a 
little bit of unease with it (and we're actually trying to move away 
from it little by little), but that shouldn't dissuade you from checking 
it out (especially if you just need AJAX out of it, I think you could be 
OK with it).  Prototype is always a good option, very minimal and easy 
to use.


I'd personally look at what you want/have to do... if you still want to 
stay away from Javascript as much as possible, that's always been an 
area that AjaxParts excels in (and I think doesn't have too many rivals 
in that regard frankly).


If you have some leeway though, you can have a very compelling 
architecture with DWR and Spring mixed in.  You find that you really 
don't need any framework at all, and the code you write is very elegant. 
 This is the direction I'm pushing at work, and I'm getting some 
traction given some early successes with the concept.


With the restrictions you have though, AjaxParts might be your best bet, 
especially if keeping the Javascript you have to write to a minimum is 
something important to you.  It'll still I think require the least 
amount of effort to work with Struts 1.1 your using, require the least 
amount of change to anything that may already exist.  DWR leads down a 
different path, and most of the other options, I believe, don't really 
offer anything all that different from one another.  There's always GWT 
too, although if you have to use Struts I'm not sure what integration 
options there are (nor am I sure you could use the older JDK version). 
I'm not aware of any other options that would, were I in your shoes, get 
me all that excited.


Frank

Rick Reumann wrote:

Hey all, unfortunately I'm going to be stuck on a new project has to use
Struts1.1 - not that I'm against Struts it's just that I'd rather use
something less archaic like Struts2 -   We have to run on an old server(
Weblogic8.1), won't upgrade to java5, servletspec2.3/jsp1.2), have to use
offshore help, etc, they want to use struts1.1.  I'm prefacing it with that
because I'm looking for suggestions in dealing with several components that
are going to have to rely on using Ajax. I'd like to know some of your
recommendations. I've had great experience in the past with AjaxParts (
http://javawebparts.sourceforge.net/) and will probably use them again - but
being out of the front-end loop for a long time, I could be missing out on
some other ajax libraries that have come out recently.

Just a few caveats...

1) Has to run using some older specs (Java1.4, Servlet2.3/JSP1.2 )
2) I'd rather have easy to use and customize over a 'full featured gigantic
suite of components.

Thanks for any recommendations.





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Checked by AVG Free Edition. 
Version: 7.5.487 / Virus Database: 269.13.22/1015 - Release Date: 9/18/2007 11:53 AM


--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [OT] Ajax recommendations for use with Struts1.1

2007-09-19 Thread Frank W. Zammetti


Roger Ye wrote:

Hi Frank,

I'm interested in the experience with DWR and Dojo you have got,
so why are you trying to move away from Dojo? then move to which?
is is DWR?


Let me begin by giving the caveat that we started with Dojo 0.3.1, and 
have never had the time to upgrade, so we're still on that version. 
We've also had to make quite a few custom mods (not just a custom build, 
actual Dojo code changes) to it to get it to do everything we needed, 
which makes upgrading that much harder.  For reference, we're using 
dojo.io.bind, plus some widgets (tab, calendar, button, floating pane 
and menu).  We used to use the button widget too, but swapped that out 
for performance reasons, believe it or not!


We're moving away from Dojo because of one realization: it's better to 
build with best-of-breed products than to try and grab one do-it-all 
product.  We choose Dojo initially for two reasons.  One, it was gaining 
a lot of steam at the time we made the decision, and two, because of the 
nature of our development team (they had no RIA development experience 
and didn't have a ton of Struts experience either), we felt it would be 
better to have one library that did everything we needed.  We decided we 
wanted to use Struts (1.2.7) because there was at least *some* 
familiarity on the team with it, so we needed to find some method of 
AJAX that could co-exist with it, so DWR wasn't the best choice at the 
time either.  And really there was a third reason: there was no dominant 
Javascript/AJAX library really, but Dojo seemed to be on its way to 
becoming that (and still may be), so there really wasn't a *whole* lot 
of choice, given some of our challenges.


And since someone is bound to ask, we considered AjaxParts of course, 
would be crazy if we didn't consider the project I started!  We decided 
against it because the nature of the app we were charged with building 
would have required a ton of custom handlers to be coded, and when you 
get to that point, the benefits of APT start to melt away.


We had our problems with Dojo along the way ranging from performance to 
bugs to missing features.  But again, to be fair, we're talking about a 
fairly old version at this point.  We overcame all of these, and the app 
is very highly regarded now, so the choice hasn't actually hurt us in 
any big way.


The drive towards DWR is coming from me specifically because it starts 
you down a path of an architecture that makes a ton of sense to me: 
best-of-breed widgets and support libraries on the client, and nothing 
but POJOs on the server.  No framework like Struts to learn, no 
complicated Javascript to learn (at least for the remoting part of the 
equation) and very quick turn-around times because writing a POJO is 
quicker than anything Struts can offer (and the less said about EJBs, 
even 3.0 beans, the better).  Mix in the right widgets and you can get 
an incredibly rich webapp up and running in almost no time at all.


I'm also introducing Spring to a lot of people little by little (and 
learning it myself little by little), as part of our developing 
reference architecture, so we get a lot of benefit there too, and it 
integrates nicely with DWR.


We're finding that a lot of the things we thought would be problems, 
like the desire to have method-level access control like you get with 
EJBs, is not much more work in this model.  There are still some 
challenges of course (like not having il8n automatically like you can 
have with Struts), but overall it's working out very well.



I've used DWR in a previous project, for me it's quite good, gotta love it,
however, in the current project we use Struts 2 and Struts 2 seems to have
some connection with Dojo, so I appreciate a lot if you could share your
story with Dojo.


I can't talk intelligently (as if that ever stops me!) about the AJAX 
support in S2 because I only have some playground experience with 
it... I've yet to use S2 in a real project that wasn't contrived for my 
own benefit... then again, with this simple DWR-based architecture 
gaining steam, I may never have to.  Ironically, S2 does a lot of what 
we did in our project: abstracts away the details of Dojo.  We pretty 
much built an API around Dojo so that our more junior developers barely 
knew they were using Dojo.  Some of this was taglibs (especially where 
widgets were involved), other parts of it was a Javascript API that is 
more business/function-oriented, so for instance, instead of having to 
worry about how to do an AJAX call with Dojo, you instead call our 
submitFormTargetTab() method, and that would deal with all the details 
and put the results in the specified tab on the screen (plus it deals 
with a lot of other related things that don't have to do with Dojo).


Well, that's my .0006 cents on things.


Thanks
Roger


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED

Re: Ajax using XMLHttpRequest and Struts

2007-09-11 Thread Frank W. Zammetti

Simply forward to a JSP and render your output there, same as any Struts
Action.  It can be XML, JSON, HTML, some custom format, whatever.  I wish
I had written that article showing that in the first place since this is a
question that gets asked all the time, but I thought this was simpler (one
less bounce to follow the ball through), but in retrospect.. :(

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Tue, September 11, 2007 11:46 am, aarthy wrote:

 Hi,

 In the below code,how can I avoid the HTML coding in the action
 class?(http://www.omnytex.com/articles/xhrstruts/xhrstruts.zip)
 I tried many different codings,but everything failed.

 public class Example3GetCharactersAction extends Action {


   public ActionForward execute(ActionMapping mapping, ActionForm inForm,
 HttpServletRequest request, HttpServletResponse response) throws Exception
 {

 // Get a list of characters associated with the select TV show
 String tvShow = (String)request.getParameter(tvShow);
 if (tvShow == null) {
   tvShow = ;
 }
 ArrayList characters = getCharacters(tvShow);

 // And yes, I know creating HTML in an Action is generally very bad
 form,
 // but I wanted to keep this exampel simple.
 String html = select name=\CharactersSelect\;
 int i = 0;
 for (Iterator it = characters.iterator(); it.hasNext();) {
   String name = (String)it.next();
   i++;
   html += option value=\ + i + \ + name + /option;
 }
 html += /select;

 // Write the HTML to response
 response.setContentType(text/html);
 PrintWriter out = response.getWriter();
 out.println(html);
 out.flush();

 return null; // Not forwarding to anywhere, response is fully-cooked

   } // End execute()


   // This method returns a list of characters for a given TV show.  If no
 TV
   // show is selected, i.e., initial page view, am empty ArrayList is
 returned.
private ArrayList getCharacters (String tvShow) {

ArrayList al = new ArrayList();

if (tvShow.equalsIgnoreCase(StarTrekTNG)) {
   al.add(Jean Luc Picard);
   al.add(William T. Riker);
   al.add(Data);
   al.add(Deanna Troi);
   al.add(Geordi LaForge);
 }

 if (tvShow.equalsIgnoreCase(Babylon5)) {
   al.add(John Sheridan);
   al.add(Delenn);
   al.add(Londo Mollari);
   al.add(Stephen Franklin);
   al.add(Vir Cotto);
 }

 if (tvShow.equalsIgnoreCase(StargateSG1)) {
   al.add(Samantha Carter);
   al.add(Jack O'Neil);
   al.add(Teal'c);
   al.add(Daniel Jackson);
   al.add(Baal);
 }

   return al;

 } // End getCharacters()

 Thanks.

 --
 View this message in context:
 http://www.nabble.com/Ajax-using-XMLHttpRequest-and-Struts-tf4423481.html#a12617736
 Sent from the Struts - User mailing list archive at Nabble.com.


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Re: Ajax using XMLHttpRequest and Struts

2007-09-11 Thread Frank W. Zammetti

Something is wrong in your JSP... looks like that stack trace was cut off,
but your beyond the AJAX parts at this point, you need to find the error
in your JSP.

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Tue, September 11, 2007 2:25 pm, aarthy wrote:

 Frank,

 I tried forwarding it to a jsp page ShowCharacters.jsp

 select name=TVShowSelect
   %int i = 0;
   ArrayList ch = (ArrayList)
 request.getSession().getAttribute(characters);
   String[] s = new String[ch.size()];
   ch.toArray(s);
   for (Iterator it = s.length; it.hasNext();) {
 String name = (String)it.next();
  %
option%=name%/option
   /select

 public ActionForward execute(ActionMapping mapping, ActionForm inForm,
 HttpServletRequest request, HttpServletResponse response) throws Exception
 {

String tvShow = (String)request.getParameter(tvShow);
   if (tvShow == null) {
tvShow = ;
   }
   ArrayList characters = getCharacters(tvShow);
   request.getSession().setAttribute(characters, 
 characters);
   response.setContentType(text/html);
   return mapping.findForward(success);
 } // E
 But when I select some value from the first combo box(TVShowSelect),I get
 the message Problem:Internal Server Error.
 IN the logs,I get the following error message

 Servlet.service() for servlet jsp threw exception
 org.apache.jasper.JasperException: Unable to compile class for JSP:




 Stacktrace:
   at
 org.apache.jasper.compiler.DefaultErrorHandler.javacError(DefaultErrorHandler.java:85)
   at
 org.apache.jasper.compiler.ErrorDispatcher.javacError(ErrorDispatcher.java:330)
   at
 org.apache.jasper.compiler.JDTCompiler.generateClass(JDTCompiler.java:435)
   at org.apache.jasper.compiler.Compiler.compile(Compiler.java:298)
   at org.apache.jasper.compiler.Compiler.compile(Compiler.java:277)
   at org.apache.jasper.compiler.Compiler.compile(Compiler.java:265)
   at
 org.apache.jasper.JspCompilationContext.compile(JspCompilationContext.java:564)
   at
 org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:299)
   at
 org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:315)
   at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:265)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
   at
 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
   at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   at
 org.apache.catalina.core.ApplicationDispatcher.invoke(ApplicationDispatcher.java:691)
   at
 org.apache.catalina.core.ApplicationDispatcher.processRequest(ApplicationDispatcher.java:469)
   at
 org.apache.catalina.core.ApplicationDispatcher.doForward(ApplicationDispatcher.java:403)
   at
 org.apache.catalina.core.ApplicationDispatcher.forward(ApplicationDispatcher.java:301)
   at
 org.apache.struts.action.RequestProcessor.doForward(RequestProcessor.java:1063)
   at
 org.apache.struts.action.RequestProcessor.processForwardConfig(RequestProcessor.java:386)
   at
 org.apache.struts.action.RequestProcessor.process(RequestProcessor.java:229)
   at
 org.apache.struts.action.ActionServlet.process(ActionServlet.java:1194)
   at org.apache.struts.action.ActionServlet.doGet(ActionServlet.java:414)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:690)
   at javax.servlet.http.HttpServlet.service(HttpServlet.java:803)
   at
 org.apache.catalina.core.ApplicationFilterChain.internalDoFilter(ApplicationFilterChain.java:269)
   at
 org.apache.catalina.core.ApplicationFilterChain.doFilter(ApplicationFilterChain.java:188)
   at
 org.apache.catalina.core.StandardWrapperValve.invoke(StandardWrapperValve.java:210)
   at
 org.apache.catalina.core.StandardContextValve.invoke(StandardContextValve.java:174)
   at
 org.apache.catalina.core.StandardHostValve.invoke(StandardHostValve.java:127)
   at
 org.apache.catalina.valves.ErrorReportValve.invoke(ErrorReportValve.java:117)
   at
 org.apache.catalina.core.StandardEngineValve.invoke(StandardEngineValve.java:108)
   at
 org.apache.catalina.connector.CoyoteAdapter.service(CoyoteAdapter.java:151)
   at
 org.apache.coyote.http11.Http11Processor.process(Http11Processor.java:870

Re: calling a javascript function from my java class

2007-09-06 Thread Frank W. Zammetti

Is this Struts1 or Struts2?  That will (potentially) change the 
mechanics a little, but in theory, sure, it's easy to do.  Assume 
Struts1 for a moment...


1. User triggers event on the page that does the delete.  This causes a 
Javascript function to be executed.

2. That function makes an AJAX request, using your favorite library.
3. Action is invoked (AJAX just requests a URL after all, which is what 
a Struts action mapping is) and does its work.
4. Action forwards to a JSP as is typical.  This JSP can be something as 
simple as this:


% if (request.getAttribute(deleted) != null) { %
%=request.getAttribute(nodeID)%
% } else { %
NOT DELETED
% } %

Assuming the action put the deleted attribute in request if the delete 
was accomplished, as well as the ID of the ndoe that was deleted, that's 
all there is to it.


5. The response is returned to the client, and being an AJAX request, 
some Javascript function that you specified at the time the call was 
made, the AJAX callback function, is executed.  Passed to it will be the 
response from the server.  So, you simply do a quick check to see which 
string got returned, and if its != NOT DELETED, call whatever delete 
method likely exists for the tree widget your using (most provide this), 
passing it the response from the server, which is in fact the ID of the 
node to delete.  No need to rebuild the tree, no need to re-render the 
page, no need to return an updated set of data, just delete the one node 
you need to.


That's all there is to it.  Now, you don't even need the JSP if you 
don't want to have it, you can write the same response out from the 
Action, but using a JSP, even for something as trivial as this, tends to 
be more flexible and easier to toy with.  AJAX always works this way, 
basically, so if your talking Struts2 you may do some things slightly 
different because there's some built-in AJAX support that might hide 
some of this from you and make it easier, but basically it's the same 
underlying flow.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Session A Mwamufiya wrote:

The jsp page sends a delete request to the struts action that determines 
whether or not the object associated with the node can be deleted from the 
database.  The struts action removes the object from the database if all is 
well, and at this point, I would like to have the struts action notify the jsp 
that it can remove the node from the tree.  Is there a way to set it up so that 
the jsp page gets a return value from the action and javascript within the jsp 
page removes the node accordingly?

Thanks,
Session



3. Generate JavaScript in the Ajax result that removes the node (and
re-renders the tree if necessary; I don't know how all that works) and
execute it.

--- Chris Pratt [EMAIL PROTECTED] wrote:


You can use the Rhino JavaScript interpreter to execute JavaScript from
Java, but I don't think that's actually what you are looking for.

It sounds like you are asking How to I run some JavaScript in the 
client's browser when something changes on the server?  And the short 
answer is, you can't.  At least not directly.


Remember, the web uses a Request/Response model where the Browser makes a
request and the server returns a response, so there is no simple way for
the server to initiate something happening in the browser.

Two options I can see are:

1. Have the browser make an AJAX request and the server can return the 
new DOM tree without the removed node


2. Have the browser resubmit the request and the new page can be built 
without the removed node.


(*Chris*)

On 9/6/07, Session A Mwamufiya [EMAIL PROTECTED] wrote:

Hi,

Does anyone have an example of how to call a

javascript function from a java class?  I want to call a javascript
function that removes a node from a tree after a java class removed it
from the database.

Thanks, Session




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Re: How to access the ActionForm in a JSP?

2007-09-04 Thread Frank W. Zammetti

You can find the form as a request attribute with the same name you used
in your config file, so:

MyActionForm form = (MyActionForm)request.getAttribute(myFormName);

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!

REMIJAN, MICHAEL J [AG/1000] wrote:

Newbie question here. Suppose I have action, helloworld.action which
I use to grab a bunch of data I wish to display on a JSP page. My
question is how do get a reference to that action object in the JSP
page? The tutorials on the Struts2 website showed examples using form
/ tags, but I don't need to use form / tags. I just want to display
data.

Michael J. Remijan

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Re: How to access the ActionForm in a JSP?

2007-09-04 Thread Frank W. Zammetti

Oh, you know what, my bad... I'm on vacation this week and my brain is 
shut down even more than some would say it normally is... you asked 
about Struts2, and I answered for Struts1.  Sorry about that, ignore 
what I said.


For S2, let's say you have a String property name on your 
HelloWorldAction class, you can use:


s:property value=name/

...in your JSP to display it.  You'll also need:

[EMAIL PROTECTED] prefix=s uri=/struts-tags %

...to make that work.  And of course, make sure you have an appropriate 
getter method on the Action too.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

REMIJAN, MICHAEL J [AG/1000] wrote:

So if I have helloworld.action defined as:

action name=helloworld class=test.struts.HelloWorldAction
result/WEB-INF/jsp/helloworld.jsp/result
/action 

Then I can retrieve the object with:

MyActionForm form = (MyActionForm)request.getAttribute(helloworld);

??


-Original Message-
From: Frank W. Zammetti [mailto:[EMAIL PROTECTED] 
Sent: Tuesday, September 04, 2007 8:31 AM

To: Struts Users Mailing List
Subject: Re: How to access the ActionForm in a JSP?

You can find the form as a request attribute with the same name you used

in your config file, so:

MyActionForm form = (MyActionForm)request.getAttribute(myFormName);

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

REMIJAN, MICHAEL J [AG/1000] wrote:

Newbie question here.  Suppose I have action, helloworld.action

which

I use to grab a bunch of data I wish to display on a JSP page.  My
question is how do get a reference to that action object in the JSP
page?  The tutorials on the Struts2 website showed examples using

form

/ tags, but I don't need to use form / tags.  I just want to

display

data.

Michael J. Remijan





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of this e-mail by you is strictly prohibited.


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or other Malware. Monsanto accepts no liability for any damage caused
by any such code transmitted by or accompanying this e-mail or any
attachment.

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Re: Running Dojo on a struts project

2007-09-03 Thread Frank W. Zammetti

It *looks* like your using a Dojo profile that doesn't include the 
pieces you need, and Dojo is going off and trying to import them and not 
finding them.  Have a look here:


http://www.nabble.com/djConfig-params-t2109960.html

You should set djConfig.baseScriptUri first, see if that resolves your 
problem, then think about the profile your using.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Session A Mwamufiya wrote:

Who has experience using Dojo?  Please help me get it setup.  I added the dojo.js file 
from the 0.9.0 release (I think it's the latest) to my webcontent folder in an eclipse 
WAP project, but firebug keeps giving me the same error djConfig.baseScriptUri has 
no properties getBaseScriptUri()dojo.js (line 155)

Please help,

Thanks,
Session



To follow up on this; I used firebug to try to figure out what was going
on, and this is the error message I get in the console:

djConfig.baseScriptUri has no properties getBaseScriptUri()dojo.js (line
155) loadPath(src/lang/__package__.js, dojo.lang, undefined)dojo.js
(line 187) loadModule(dojo.lang, undefined, undefined)dojo.js (line 341) 
require(dojo.lang.*)dojo.js (line 419) [Break on this error]

if(djConfig.baseScriptUri.length){

There seems to be an error in the dojo.js file.  I'm using version 0.4.3 
with ajax.  Can someone send me the link to a working version of the

file?

Thanks,

Session A. Mwamufiya Carnegie Mellon University MBA | Tepper School of
Business MSE (software eng.) | School of Computer Science T: (412) 508-5455
| [EMAIL PROTECTED]

-Original Message- From: Session A Mwamufiya
[mailto:[EMAIL PROTECTED] Sent: Monday, September 03, 2007 9:08 AM 
To: user@struts.apache.org Subject: Running Dojo on a struts project


Hi,

I'm attempting to follow a Dojo tree widget tutorial, 
http://willcode4beer.com/ware.jsp?set=dojoTreeWidget, where Dojo is used

to define a tree.  Unfortunately nothing comes up on the page, even though
the page source shows the tree definition.

The tree page is set as the result page for a dummy action (which
executes), but that's the only connection I have between Dojo and struts.
Is there anything in particular I need to do to get Dojo to run within a
struts app?

Thanks, Session


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Re: Sanitize Text

2007-08-23 Thread Frank W. Zammetti

I'd be more inclined towards a filter here, preferably close to the top 
of the chain... my thought is it's better to deal with things like that 
as soon as possible because there's less chance of something exploitable 
down the pipe.  We have a cross-site scripting filter in our standard 
security stack at work for precisely that reason.  I realize your not 
stating security as your concern, but I think the argument would be very 
much the same... might not be an exploit your too worried about, but an 
exception thrown that breaks the app for the user isn't much better :)


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Toni Lyytikäinen wrote:

You could just override the string conversion in xwork:

http://struts.apache.org/2.x/docs/type-conversion.html

define something like this in xwork-conversion.properties

java.lang.String=org.example.MyConverter

Then create a class MyConverter that extends the XWorkBasicConverter and
override the behaviour of the convertValue method in the case of string to
string conversion.

I'm not sure if this is actually a good way, but it's easy enough and with
simple configuration it works everywhere in you webapp.

On 8/23/07, Ian Roughley [EMAIL PROTECTED] wrote:

This is a good approach.  In fact, you might start with the params
interceptor - as it is responsible for assigning data to the action, and
all that is needed is to sanitize before assignment.

/Ian

Richard Sayre wrote:

I was wondering what the best approach would be for taking form data
passed to an Action and removing 'special characters' from the data.
I am having issues with users pasting text from word docs etc.  We
only support ISO-8859-1 as of now and there are some characters that
Word will replace such as ' and  with character that are outside the
8839-1 character set.

I was thinking about an interceptor that would sanitize the request
parameters before they are passed to the action.  Is this a good
approach?  Can anyone suggest a better one?  It does not matter if it
uses Struts or not.

Thank you

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Re: [OT] Re: Passing value from Struts tag in JSP to Action class

2007-08-13 Thread Frank W. Zammetti


Oleg Konovalov wrote:

No, I am not using any AJAX.

On Submit it supposed to process that row, go to DB and refresh the whole
page,
so to come back on the same page.

Also, my form is declared as html:form, so onClick I use
form.action='action.do?command=notify', I can't get rid of it,
but it doesn't want to coexist with any Javascript.

I would not like to have multiple forms on one JSP page.

So which of your suggestions would you recommend in my case ?
And how do I get a value of rowId in Action class (notify action),
via request.getSession().getAttribute(rowId) ?


You wouldn't get it from SESSION, you'd get it from REQUEST... Unless 
your intention is to have a session-scoped ActionForm, but then you 
wouldn't get at the value as you've shown anyway (in fact, even if it's 
a request-scoped from, that's the wrong way to get the value, since your 
bypassing Struts to do it).


Since you aren't using AJAX, and you want a single form, all you need to 
do is set things up in a 100% typical Struts fashion... have the HTML 
form submit to the Action you want it to, and connect an ActionForm, 
probably request-scoped, to that Action.  Make sure your ActionForm 
includes the properly named getter/setter/field for it.  Then, on your 
HTML form, add a hidden field with the name rowId, and make each button 
on the form a submit button (you can have more than one), and add an 
onClick event to it that does this:


this.form.rowId.value='${list.rowId}';

That should do it.  Then, in your Action you just do:

String rowId = form.getRowId();

...assuming form is the name of the ActionForm parameter.  That should 
be all you need to do.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!


Thank you,
Oleg.



On 8/12/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

Oleg Konovalov wrote:

I have a bunch of rows [ArrayList of ValueObject Classes], and a button
corresponding to each row.
I populate the data from each row in forEach loop.
User is supposed to click on one of these buttons [selecting one row to
process],
and onClick event I need to pass the rowId of the to the new Action
[notify] in Action class.
Sounds like a trivial task ?
I am just not sure how to implement that correctly in Struts, pretty new

to

Struts.

Depends on what you expect to happen when they click the button... is
the entire page refreshed, or are you thinking of doing some AJAX here?
If the entire page is going to refresh, I'd simply make each row its
own form and have the button be a regular submit button.  Add a hidden
field to each form that has the rowId as its value.  Simple, standard,
will work just fine.  Alternatively, if you don't like multiple forms,
then have a single hidden form field which again is the row Id, then
onClick of the button do:

this.form.rowId.value='${list.rowId}';this.form.submit();

If your thinking AJAX here, then there's all sorts of ways you could do
it.


Maybe I should use
html:submit src=pic.gif onclick=form.action='action.do?command=notify'

*

value*=${list.rowId}
instead of HTML input type=image... ?

Yes, in theory that could work, but I think it's a bit too complicated.
Again, if your not thinking AJAX here, just do a plain form
submission, it's the best answer.  If you DO want to do AJAX, let us
know and we can suggest ways to go about it.

Dave's suggestions are good too, it just comes down to how you really
want this to work.


TIA,
Oleg.

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!

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Re: [OT] Re: Passing value from Struts tag in JSP to Action class

2007-08-13 Thread Frank W. Zammetti


Oleg Konovalov wrote:

make each button on the form a submit button

I can't do it, because button has to have image, so I use input
type=image...
Will that work ?


I believe so... best way to be sure would be to try it :) ... but I 
don't see why it wouldn't.



Also, are you sure thisthis.form.rowId.value='${list.rowId}';
will work together with myform.action='action.do?command=notify'
I think, Javascript will get screwed up - will complain.
And I will have to make all inside a scriplet, something like:
onClick=% form.rowId.value=*c:out* *value=*'${list.rowId}/;
form.action='action.do?command=notify'  %
Is that better ?


No, that would be wrong... go ahead and give it a try, you'll get a 
compile error on the JSP because the expression isn't valid.  You may 
however be right to a degree... you may need to use c:out in place of 
${list.rowId} (I think ${list.rowId} is valid JSP 2.0 EL, but that 
assumes JSP 2.0)... I think that's a valid JSP expression... again, give 
it a try, this is a syntactical issue that a minute or two of playing 
will resolve, it's the conceptual part you need to understand first.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!




On 8/13/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

Oleg Konovalov wrote:

No, I am not using any AJAX.

On Submit it supposed to process that row, go to DB and refresh the

whole

page,
so to come back on the same page.

Also, my form is declared as html:form, so onClick I use
form.action='action.do?command=notify', I can't get rid of it,
but it doesn't want to coexist with any Javascript.

I would not like to have multiple forms on one JSP page.

So which of your suggestions would you recommend in my case ?
And how do I get a value of rowId in Action class (notify action),
via request.getSession().getAttribute(rowId) ?

You wouldn't get it from SESSION, you'd get it from REQUEST... Unless
your intention is to have a session-scoped ActionForm, but then you
wouldn't get at the value as you've shown anyway (in fact, even if it's
a request-scoped from, that's the wrong way to get the value, since your
bypassing Struts to do it).

Since you aren't using AJAX, and you want a single form, all you need to
do is set things up in a 100% typical Struts fashion... have the HTML
form submit to the Action you want it to, and connect an ActionForm,
probably request-scoped, to that Action.  Make sure your ActionForm
includes the properly named getter/setter/field for it.  Then, on your
HTML form, add a hidden field with the name rowId, and make each button
on the form a submit button (you can have more than one), and add an
onClick event to it that does this:

this.form.rowId.value='${list.rowId}';

That should do it.  Then, in your Action you just do:

String rowId = form.getRowId();

...assuming form is the name of the ActionForm parameter.  That should
be all you need to do.

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!


Thank you,
Oleg.



On 8/12/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

Oleg Konovalov wrote:

I have a bunch of rows [ArrayList of ValueObject Classes], and a

button

corresponding to each row.
I populate the data from each row in forEach loop.
User is supposed to click on one of these buttons [selecting one row

to

process],
and onClick event I need to pass the rowId of the to the new Action
[notify] in Action class.
Sounds like a trivial task ?
I am just not sure how to implement that correctly in Struts, pretty

new

to

Struts.

Depends on what you expect to happen when they click the button... is
the entire page refreshed, or are you thinking of doing some AJAX here?
If the entire page is going to refresh, I'd simply make each row its
own form and have the button be a regular submit button.  Add a hidden
field to each form that has the rowId as its value.  Simple, standard,
will work just fine.  Alternatively, if you don't like multiple forms,
then have a single hidden form field which again is the row Id, then
onClick of the button do:

this.form.rowId.value='${list.rowId}';this.form.submit();

If your thinking AJAX here, then there's all sorts of ways you could do
it.


Maybe I should use
html:submit src=pic.gif onclick=

form.action='action.do?command

Re: [OT] Re: Passing value from Struts tag in JSP to Action class

2007-08-12 Thread Frank W. Zammetti


Oleg Konovalov wrote:

I have a bunch of rows [ArrayList of ValueObject Classes], and a button
corresponding to each row.
I populate the data from each row in forEach loop.
User is supposed to click on one of these buttons [selecting one row to
process],
and onClick event I need to pass the rowId of the to the new Action
[notify] in Action class.
Sounds like a trivial task ?
I am just not sure how to implement that correctly in Struts, pretty new to
Struts.


Depends on what you expect to happen when they click the button... is 
the entire page refreshed, or are you thinking of doing some AJAX here? 
 If the entire page is going to refresh, I'd simply make each row its 
own form and have the button be a regular submit button.  Add a hidden 
field to each form that has the rowId as its value.  Simple, standard, 
will work just fine.  Alternatively, if you don't like multiple forms, 
then have a single hidden form field which again is the row Id, then 
onClick of the button do:


this.form.rowId.value='${list.rowId}';this.form.submit();

If your thinking AJAX here, then there's all sorts of ways you could do it.


Maybe I should use
html:submit src=pic.gif onclick=form.action='action.do?command=notify' *
value*=${list.rowId}
instead of HTML input type=image... ?


Yes, in theory that could work, but I think it's a bit too complicated. 
 Again, if your not thinking AJAX here, just do a plain form 
submission, it's the best answer.  If you DO want to do AJAX, let us 
know and we can suggest ways to go about it.


Dave's suggestions are good too, it just comes down to how you really 
want this to work.



TIA,
Oleg.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Add Web Service to Struts Web App

2007-08-11 Thread Frank W. Zammetti

No, currently this does not apply for S2... it's in my to-do list to 
bring this capability to S2, but I have no ETA on that at the moment.  I 
don't know if there are other options that do something similar already 
for S2, I wouldn't be surprised if there was.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Leonidas Papadakis wrote:

Does this apply to Struts2 as well ? If not is there an alternative ?

Thanks

Leon

Frank W. Zammetti wrote:

One simple answer might be the StrutsWS project:

http://sourceforge.net/projects/strutsws/

In CVS you'll find a version for the 1.3.x branch of Struts.  Simply 
put, it allows you to call your existing Struts Actions as Web 
Services without any changes to them.  This means any validation you 
have configured should still work, they don't know they are being 
accessed as services versus part of a Struts app.


I have to say the project hasn't been developed lately, but we left it 
in a stable state, and anyone is free to pick up where we left off if 
they wanted to.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

semaj.najraham wrote:

Hi,

I've been googling and looking at the user mailing list if I add web 
service
to a struts based application, but didn't find my answers. Currently 
I am

developing a struts based application with Struts 1.3.8 with Struts
validator framework. I've implemented business layer and data layer.

In future, I need to integrate my app with other applications such as 
portal

using web service. Therefore, I would like to think ahead on how I can
integrate since I've not worked with web service before.

By googling and reading some of the articles, I found out that web 
service
can call struts actions.  My real concern is the data validation. 1. 
Can I use Struts validator framework?
2. If not, do I need to do validation at data layer? 3. If I need to 
do validation at data layer, can I use Commons Validator ? 4. If I 
use Commons Validator, should I use it in both presentation layer

and data layer.

Commons Validator was a part of Struts Validator. I'm totally lost!

Any help will be greatly appreciated.

Thanks,
semaj



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Re: [OT] Re: Passing value from Struts tag in JSP to Action class

2007-08-11 Thread Frank W. Zammetti

What is rowId?  That's not a standard attribute of the input tag, 
hence the error makes sense I think, assuming it's being interpreted 
equivalent to this.rowId... also, value doesn't have any context here, I 
assume you mean to do this.value (which it may be interpreted as 
anyway), but maybe not... what are you actually trying to do?


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Oleg Konovalov wrote:

Dave,

What am I doing wrong in that Javascript ?
Honestly, I don't see it.
Please help !

Thank you,
Oleg.



On 8/10/07, Dave Newton [EMAIL PROTECTED] wrote:

--- Oleg Konovalov [EMAIL PROTECTED] wrote:

   input type=image onclick=rowId=value;
As of now I am getting Javascript error Object
doesn't support this property or method,

complaining

about *rowId=value;*

The onclick attribute must have valid JavaScript.

d.






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Re: struts1 or struts 2?

2007-08-10 Thread Frank W. Zammetti


Asthana, Rahul wrote:

By the way, have any of you done any performance metrics on an ajax based 
implementation vs a non ajax based one?


Early on we did a proof-of-concept that did exactly this... what we 
found was that the AJAX version was universally perceived as being 
faster, even when a few cases actually weren't (i.e., client-side 
processing took longer than the equivalent server-side version).


The conclusions we drew were:

1. You have to strive to minimize the amount of Javascript executing as 
a result of each AJAX call.  There is a line that when crossed means the 
server can actually render the whole page fresh and the browser can 
display it faster than AJAX+Javascript updates.


2. There is a balance you need to strike between the number of AJAX 
calls and size of each AJAX response... there is again a line that when 
crossed means that X number of small AJAX requests takes more time than 
one non-AJAX transaction.


3. There is definitely tuning that needs to be done in terms of moving 
static resources off to the web server, making sure your AJAX responses 
are tight, things like that.  The very biggest impact we found, recently 
actually, was in moving all images, CSS, Javascript and other static 
content off to the web server... especially when your doing AJAX and 
your making numerous small requests vs. one or two larger non-AJAX 
requests, not having to hit the web server makes a huge difference... 
remember that in most cases, there is a small number of connections 
available between the web server and app server (we had 5 I believe) 
even though you may have 100 connections/threads available on the web 
server (and probably app server).  That's where we found the most 
significant bottleneck... we're talking making an app twice as fast just 
by moving static content off the app server!


4. Aside from the static content thing, this is the biggest point to 
emphasize: you need to get your developers thinking a different way then 
they probably are used to... they need to, for lack of a better way to 
put it, trust the client more.  For instance, we had developers that 
insisted on putting objects in session, even though myself and other 
senior developers were telling them it'd be better to keep things in 
Javascript objects client-side... they would tell you now we were 100% 
right :)  This isn't a criticism of them though, when your used to doing 
things a certain way, and they basically work well, you don't want to 
change, especially given what many people have historically thought 
about Javascript and client-side development.  But once you get the 
mindset changing, you'll see a really huge improvement in performance of 
your apps because the fundamental design leads to better performance 
naturally.



rgds
Rahul


Frank

--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Add Web Service to Struts Web App

2007-08-10 Thread Frank W. Zammetti


One simple answer might be the StrutsWS project:

http://sourceforge.net/projects/strutsws/

In CVS you'll find a version for the 1.3.x branch of Struts.  Simply 
put, it allows you to call your existing Struts Actions as Web Services 
without any changes to them.  This means any validation you have 
configured should still work, they don't know they are being accessed as 
services versus part of a Struts app.


I have to say the project hasn't been developed lately, but we left it 
in a stable state, and anyone is free to pick up where we left off if 
they wanted to.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

semaj.najraham wrote:

Hi,

I've been googling and looking at the user mailing list if I add web service
to a struts based application, but didn't find my answers. Currently I am
developing a struts based application with Struts 1.3.8 with Struts
validator framework. I've implemented business layer and data layer.

In future, I need to integrate my app with other applications such as portal
using web service. Therefore, I would like to think ahead on how I can
integrate since I've not worked with web service before.

By googling and reading some of the articles, I found out that web service
can call struts actions.  My real concern is the data validation. 
1. Can I use Struts validator framework?
2. If not, do I need to do validation at data layer? 
3. If I need to do validation at data layer, can I use Commons Validator ? 
4. If I use Commons Validator, should I use it in both presentation layer

and data layer.

Commons Validator was a part of Struts Validator. I'm totally lost!

Any help will be greatly appreciated.

Thanks,
semaj



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Re: struts1 or struts 2?

2007-08-09 Thread Frank W. Zammetti

On Thu, August 9, 2007 8:24 am, Ted Husted wrote:
 IMHO, if we had today's JavaScript/CSS/HTML environment available to
 us in 1998, then JSP, ASP, JSF, PHP, and all the rest of it, would not
 exist. We did all these things to make up for the shortcomings of the
 client-side environment, and, since then, the key shortcomings have
 been addressed.

Great observation IMO, and it couldn't be more true.

I always like to tell the story of a Java users group I was at maybe two
years ago now... the speaker was talking about AJAX and he said that the
people who know what AJAX is at that point are the same people who are
pissed about it because frankly it hasn't been anything new for them for
some time!

I have one app that was put in production in 1998 ironically, the year you
picked here Ted, that you'd look at today and say it was AJAX, an RIA, but
it didn't use what we'd call AJAX now (hidden iFrame that got Javascript
back which executed upon return and automatically updated and hide and
showed a variety of DIVs on the page... in fact, this is the extreme case
because absolutely every view the user can ever see in the app is loaded
up front and never generated server-side, it's only data being plugged
into fields after startup).  If I'd have thought for one second that what
I was doing was any big deal, unusual in some way, it could have been my
name going down in history as having invented AJAX instead of Jesse James
Garrett!  And the worse part is I know I'm not the only one that can say
that! LOL

I've had the interesting experience of witnessing an evolution here at
work... in 1998, I was the only one building apps in that fashion at this
company, everyone else was very much at the other extreme, the whole let
the server do everything approach as you described, thin pages, etc. 
Everyone thought I was nuts (I only got away with it because my projects
are always successful, something not everyone here can claim), I got into
some really heated dehates with folks over the years about it too.  Now,
things are very much swinging the other way... apps are being built now in
much more RIA ways, it's much more mainstream thinking.

I think that evolution is playing itself out across many organizations
now, and that's my point: there's a critical mass now, and the mindset is
starting to change, and Ted's right, many of the technologies we're
saddled with today would never have needed inventing if everyone had
listened to me (or the others that were doing what I did in various
orgamizations) back in 1998! LOL

 -Ted.

Frank


-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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RE: struts1 or struts 2?

2007-08-08 Thread Frank W. Zammetti

Not specifically, no... although, both of my books go into this sort of
thing, and the first one includes a DWR-based project.

I'm also in the midst of a third book which will very definitely cover
this topic in detail right lots of practical examples... due out in,
roughly, this coming January.

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, August 8, 2007 12:58 pm, Asthana, Rahul wrote:
 Hi Ted/Frank,
 Is there a more detailed post/article that you have done regarding this
 architecture?
 Thanks
 Rahul

 -Original Message-
 From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of Ted
 Husted
 Sent: Wednesday, August 08, 2007 12:27 PM
 To: Struts Users Mailing List
 Subject: Re: struts1 or struts 2?


 On 8/7/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:
 Then again, if I *really* had my druthers, I'd use DWR for everything on
 the back-end and pick best-of-breed widgets on the UI to construct my
 own
 client-side framework... the last project I did more or less did this,
 although we used S1 and not DWR, but it worked out tremendously well, so
 in my mind the approach is more than sound, it's close to ideal...
 standard enough that a decent developer can get up to speed quick, but
 custom enough to fit the problem domain like a glove.

 +1

 My team did our last project using the same sort of architecture, but
 since the backend was on .NET, we used Jayrock instead of DWR. Works
 great, and it also seems like the ideal mix to me. We had to roll our
 own solution for the server-side validation and type conversion, but
 we based that work on a chain of command, and it's layered so we can
 reuse it with multiple front end applications.

 -Ted.

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Re: struts1 or struts 2?

2007-08-08 Thread Frank W. Zammetti

Thanks Paul... The envelope is in the mail! wink-wink/

:)

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, August 8, 2007 2:03 pm, Paul Benedict wrote:
 I have JavaScript, DOM Scripting and Ajax Projects -- good book for
 people
 who want to get into AJAX.

 On 8/8/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

 Not specifically, no... although, both of my books go into this sort of
 thing, and the first one includes a DWR-based project.

 I'm also in the midst of a third book which will very definitely cover
 this topic in detail right lots of practical examples... due out in,
 roughly, this coming January.

 Frank

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!





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Re: struts1 or struts 2?

2007-08-07 Thread Frank W. Zammetti

Not just poor Italy... my experience has been that this isn't uncommon in
the United States either, and anecdotally in other countries as well... in
fact, I'm willing to say that S1 usage, and even 1.1 usage, is still the
most common Struts usage world-wide.

Dunno where it'll be a year from now of course... I work in the finance
sector, and things tend to move a bit slower there than other sectors
might, but I don't know if that's typical of all sectors or not.

If I was starting a new project today and had a choice (but it had to be
Struts), I'd go with S2.  I find it, generally speaking, to be more
logical in how things work... simple things like attributes of tags and
config files being named in a meaningful way helps a lot.

Then again, if I *really* had my druthers, I'd use DWR for everything on
the back-end and pick best-of-breed widgets on the UI to construct my own
client-side framework... the last project I did more or less did this,
although we used S1 and not DWR, but it worked out tremendously well, so
in my mind the approach is more than sound, it's close to ideal...
standard enough that a decent developer can get up to speed quick, but
custom enough to fit the problem domain like a glove.

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Tue, August 7, 2007 2:07 pm, Antonio Petrelli wrote:
 2007/8/7, [EMAIL PROTECTED] [EMAIL PROTECTED]:
 - For the job market, which one is in higher demand?

 It depends on the nation, I suppose.
 In Italy, there are lots of requests for Struts 1 (in fact they still
 call it Jakarta Struts, and Struts 1.1 is still in use, poor Italy
 :-) )

 Antonio

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RE: DownloadAction and a normal Forward

2007-08-02 Thread Frank W. Zammetti

The thing is, I'm not entirely sure there's another viable option.  I
could certainly see extending DownloadAction in some way so that there is
kind of a verify() method called first that detects the problem that your
checking for (the if(problem) statement)... if a problem is detected,
i.e., file doesn't exist or something, then do the forward.  That should
avoid the NPE (I think), but then your probably overwriting the page on
the browser, so maybe that's worse.  In any case, that's no quick fix
since there's some RD involved.

The only thing I can think of is if you can detect you have a problem
before the download call... could you maybe do an AJAX call before the
download call to see if the file is available and downloadable?  If so,
then make the actual download request.  Or possibly make the download link
point to a regular Action that does that check, then forwards to the
mapping leading to the DownloadAction?  That way the check and the
download are in the same request... I'm not sure that would work frankly
though and I think you'd have the same problem as I mentioned earlier.

Yeah, you may have to live with the NPE... I guess if it's an exceptional
situation and isn't going to happen often it may not be a big deal.  If
it's frequent though, I think I'd do some more creative thinking to avoid
it somehow.

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Thu, August 2, 2007 4:17 am, Gundersen, Richard wrote:
 Hi Frank, Paul

 Thanks again for the tips. The thing is, having a NPE isn't actually a
 problem for me. I am quite (well, not entirely) happy for the code to
 throw it since by that time, my RequestDispatcher.forward method has
 already got my request to the browser by then, and the user is viewing
 the JSP. The fact that the DownloadAction still thinks it needs to do
 something with a dummy StreamInfo isn't such a big deal to be honest. It
 can fail for all I care since it doesn't stop the system from working (I
 know, it's not the right attitude :-)

 But, right now I am more concerned about whether using
 RequestDispatcher.forward is a safe (and/or best) way to redirect the
 request out of the DownloadAction and back to a real JSP.

 Appreciate your thoughts.

 Richard Gundersen
 Java Developer

 Email: [EMAIL PROTECTED]
 Phone: 01618302398
 Fax: 01618342536
 London Scottish Bank plc
 24 Mount Street
 Manchester
 M2 3LS

 -Original Message-
 From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
 Sent: Thursday, August 02, 2007 3:16 AM
 To: Struts Users Mailing List
 Subject: Re: DownloadAction and a normal Forward

 Hehe, your going after the *right* answer Paul :)

 It's clear the caller of getStreamInfo() doesn't like getting null back,

 that was the case originally... now, the NPE must be getting thrown from

 elsewhere after Richard returned the dummied StreamInfo object (I
 would have been surprised if constructing one with two null arguments
 *didn't* move the NPE elsewhere, but I was hoping!).

 Frank

 Paul Benedict wrote:
 Who is throwing the NPE? I can't tell by your code what's causing it.

 On 8/1/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:
 You know, I just reread what your trying to do... have you tried
 using a
 global exception handler?  I'm not sure you'll be able to catch the
 exception with one, but if you give it a try and you can, there you
 go,
 you can forward as desired from there.

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

 On Wed, August 1, 2007 10:38 am, Gundersen, Richard wrote:
 Hi

 Thanks for the reply. Tried it and it still gives me a NullPointer.
 Maybe that's not such a problem though - since the browser still
 redirects to the JSP I want.

 However, I was wondering if it's possible to use a
 ResourceStreamInfo to
 redirect to an ActionForward (which ultimately leads to a JSP).
 Would
 this be preferable to using RequestDispatcher.forward(request,
 response)?

 Richard Gundersen
 Java Developer

 Email: [EMAIL PROTECTED]
 Phone: 01618302398
 Fax: 01618342536
 London Scottish Bank plc
 24 Mount Street
 Manchester
 M2 3LS

 -Original Message-
 From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, August 01, 2007 2:47 PM
 To: Struts Users Mailing

Re: DownloadAction and a normal Forward

2007-08-01 Thread Frank W. Zammetti

It's not the *right* answer, and I'm not sure it won't cause some other
exception anyway (in fact, I'd bet it would), but what if instead of
returning null you instead do:

return new ByteArrayStreamInfo(null, null);

?

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, August 1, 2007 9:24 am, Gundersen, Richard wrote:
 Hi

 I'm using a DownloadAction to generate a PDF and return it the the
 browser. If there is a problem generating the PDF however, I want to
 redirect the user to a specific JSP.

 What's the best way of doing this? At the moment I am using


 protected StreamInfo getStreamInfo(ActionMapping mapping, ActionForm
 form,
HttpServletRequest request,
 HttpServletResponse response) {
 ...
 ...
 ...
   if(problem)

 servlet.getServletContext().getRequestDispatcher(/admin.do?doAction=alr
 eadyPrinted).forward(request, response);
   return null;
   }
   else {
   return new ByteArrayStreamInfo(contentType, myPdfBytes);
   }
 }

 This works, but I always get a NullPointer, because I'm returning null
 to satisfy the method signature. The exception doesn't cause a problem
 for the user though, because the forward has already happened by then
 (and the user is happily viewing the JSP)

 Is there a better way to do this though - perhaps with
 ResourceStreamInfo instead?

 Regards

 Richard Gundersen
 Java Developer

 Email: [EMAIL PROTECTED]
 Phone: 01618302398
 Fax: 01618342536
 London Scottish Bank plc
 24 Mount Street
 Manchester
 M2 3LS


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 the addressee. It may contain private and confidential information. The
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RE: DownloadAction and a normal Forward

2007-08-01 Thread Frank W. Zammetti

You know, I just reread what your trying to do... have you tried using a
global exception handler?  I'm not sure you'll be able to catch the
exception with one, but if you give it a try and you can, there you go,
you can forward as desired from there.

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, August 1, 2007 10:38 am, Gundersen, Richard wrote:
 Hi

 Thanks for the reply. Tried it and it still gives me a NullPointer.
 Maybe that's not such a problem though - since the browser still
 redirects to the JSP I want.

 However, I was wondering if it's possible to use a ResourceStreamInfo to
 redirect to an ActionForward (which ultimately leads to a JSP). Would
 this be preferable to using RequestDispatcher.forward(request,
 response)?

 Richard Gundersen
 Java Developer

 Email: [EMAIL PROTECTED]
 Phone: 01618302398
 Fax: 01618342536
 London Scottish Bank plc
 24 Mount Street
 Manchester
 M2 3LS

 -Original Message-
 From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
 Sent: Wednesday, August 01, 2007 2:47 PM
 To: Struts Users Mailing List
 Cc: user@struts.apache.org
 Subject: Re: DownloadAction and a normal Forward

 It's not the *right* answer, and I'm not sure it won't cause some other
 exception anyway (in fact, I'd bet it would), but what if instead of
 returning null you instead do:

 return new ByteArrayStreamInfo(null, null);

 ?

 Frank

 --
 Frank W. Zammetti
 Founder and Chief Software Architect
 Omnytex Technologies
 http://www.omnytex.com
 AIM/Yahoo: fzammetti
 MSN: [EMAIL PROTECTED]
 Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
 and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
 Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

 On Wed, August 1, 2007 9:24 am, Gundersen, Richard wrote:
 Hi

 I'm using a DownloadAction to generate a PDF and return it the the
 browser. If there is a problem generating the PDF however, I want to
 redirect the user to a specific JSP.

 What's the best way of doing this? At the moment I am using


 protected StreamInfo getStreamInfo(ActionMapping mapping, ActionForm
 form,
HttpServletRequest request,
 HttpServletResponse response) {
 ...
 ...
 ...
  if(problem)


 servlet.getServletContext().getRequestDispatcher(/admin.do?doAction=alr
 eadyPrinted).forward(request, response);
  return null;
  }
  else {
  return new ByteArrayStreamInfo(contentType, myPdfBytes);
  }
 }

 This works, but I always get a NullPointer, because I'm returning null
 to satisfy the method signature. The exception doesn't cause a problem
 for the user though, because the forward has already happened by then
 (and the user is happily viewing the JSP)

 Is there a better way to do this though - perhaps with
 ResourceStreamInfo instead?

 Regards

 Richard Gundersen
 Java Developer

 Email: [EMAIL PROTECTED]
 Phone: 01618302398
 Fax: 01618342536
 London Scottish Bank plc
 24 Mount Street
 Manchester
 M2 3LS


 *** Disclaimer ***

 This electronic communication is confidential and for the exclusive
 use of
 the addressee. It may contain private and confidential information.
 The
 information, attachments and opinions contained in this E-mail are
 those
 of its author only and do not necessarily represent those of London
 Scottish Bank PLC or any other members of the London Scottish Group.

 If you are not the intended addressee, you are prohibited from any
 disclosure, distribution or further copying or use of this
 communication
 or the information in it or taking any action in reliance on it. If
 you
 have received this communication in error please notify the
 Information
 Security Manager at [EMAIL PROTECTED] as soon as possible and
 delete
 the message from all places in your computer where it is stored.

 We utilise virus scanning software but we cannot guarantee the
 security of
 electronic communications and you are advised to check any attachments
 for
 viruses. We do not accept liability for any loss resulting from any
 corruption or alteration of data or importation of any virus as a
 result
 of receiving this electronic communication.

 Replies to this E-mail may be monitored for operational or business
 reasons. London Scottish Bank PLC is regulated by the Financial
 Services
 Authority.
 __
 This email has been scanned by the MessageLabs Email Security System

Re: DownloadAction and a normal Forward

2007-08-01 Thread Frank W. Zammetti


Hehe, your going after the *right* answer Paul :)

It's clear the caller of getStreamInfo() doesn't like getting null back, 
that was the case originally... now, the NPE must be getting thrown from 
elsewhere after Richard returned the dummied StreamInfo object (I 
would have been surprised if constructing one with two null arguments 
*didn't* move the NPE elsewhere, but I was hoping!).


Frank

Paul Benedict wrote:

Who is throwing the NPE? I can't tell by your code what's causing it.

On 8/1/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:

You know, I just reread what your trying to do... have you tried using a
global exception handler?  I'm not sure you'll be able to catch the
exception with one, but if you give it a try and you can, there you go,
you can forward as desired from there.

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
(2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
(2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
Supplying the wheel, so you don't have to reinvent it!

On Wed, August 1, 2007 10:38 am, Gundersen, Richard wrote:

Hi

Thanks for the reply. Tried it and it still gives me a NullPointer.
Maybe that's not such a problem though - since the browser still
redirects to the JSP I want.

However, I was wondering if it's possible to use a ResourceStreamInfo to
redirect to an ActionForward (which ultimately leads to a JSP). Would
this be preferable to using RequestDispatcher.forward(request,
response)?

Richard Gundersen
Java Developer

Email: [EMAIL PROTECTED]
Phone: 01618302398
Fax: 01618342536
London Scottish Bank plc
24 Mount Street
Manchester
M2 3LS

-Original Message-
From: Frank W. Zammetti [mailto:[EMAIL PROTECTED]
Sent: Wednesday, August 01, 2007 2:47 PM
To: Struts Users Mailing List
Cc: user@struts.apache.org
Subject: Re: DownloadAction and a normal Forward

It's not the *right* answer, and I'm not sure it won't cause some other
exception anyway (in fact, I'd bet it would), but what if instead of
returning null you instead do:

return new ByteArrayStreamInfo(null, null);

?

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Wed, August 1, 2007 9:24 am, Gundersen, Richard wrote:

Hi

I'm using a DownloadAction to generate a PDF and return it the the
browser. If there is a problem generating the PDF however, I want to
redirect the user to a specific JSP.

What's the best way of doing this? At the moment I am using


protected StreamInfo getStreamInfo(ActionMapping mapping, ActionForm
form,
   HttpServletRequest request,
HttpServletResponse response) {
...
...
...
 if(problem)



servlet.getServletContext().getRequestDispatcher(/admin.do?doAction=alr

eadyPrinted).forward(request, response);
 return null;
 }
 else {
 return new ByteArrayStreamInfo(contentType, myPdfBytes);
 }
}

This works, but I always get a NullPointer, because I'm returning null
to satisfy the method signature. The exception doesn't cause a problem
for the user though, because the forward has already happened by then
(and the user is happily viewing the JSP)

Is there a better way to do this though - perhaps with
ResourceStreamInfo instead?

Regards

Richard Gundersen
Java Developer

Email: [EMAIL PROTECTED]
Phone: 01618302398
Fax: 01618342536
London Scottish Bank plc
24 Mount Street
Manchester
M2 3LS


*** Disclaimer ***

This electronic communication is confidential and for the exclusive

use of

the addressee. It may contain private and confidential information.

The

information, attachments and opinions contained in this E-mail are

those

of its author only and do not necessarily represent those of London
Scottish Bank PLC or any other members of the London Scottish Group.

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communication

or the information in it or taking any action in reliance on it. If

you

have received this communication in error please notify the

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delete

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We utilise virus scanning software but we cannot guarantee the

security of

electronic communications and you are advised to check any attachments

for

viruses. We do not accept liability for any loss resulting from any

Re: CSS / JavaScript menu libraries for Struts 2 Showcase application

2007-07-31 Thread Frank W. Zammetti


The single best set of web UI components I've found to date is here:

http://scbr.com/docs/products.shtml

It includes a menu, tabbar (the single best implementation ever IMO), 
treeview, grid, toolbar, and others.  The dhtmlx* components are 
well-documented, easy to use, lightweight, feature-rich and stable... 
they are also free (I believe all of them) if they are part of a GPL'd 
code base, so there's the question: is the GPL compatible with the ASL? 
 My Bar exam score card has not arrived yet, so I'm not (yet) qualified 
to answer :)


Frank

(that was a joke, I haven't taken the Bar exam)

James Holmes wrote:

I'm looking into updating the Struts 2 Showcase application with a new menuing
system so that it is easier to use. Anyone have any recommendations on existing
CSS / JavaScript libraries? The library will need to be open source and have a
license that is compatible with Struts 2.

I'd like to hear what type of menu people would like to see as well. Should it 
be
a drop down style? Tabs?

It would probably be nice if the menu has a built-in mechanism for breadcrumbs 
or
at least support working with them in some way.

All feedback is helpful.

Thanks,

James

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--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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To unsubscribe, e-mail: [EMAIL PROTECTED]
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Re: CSS / JavaScript menu libraries for Struts 2 Showcase application

2007-07-31 Thread Frank W. Zammetti

Well, I guess that's that then... dhtmlx components are currently under 
GPL2.  Shame, they're really excellent implementations.


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Dave Newton wrote:

--- Frank W. Zammetti [EMAIL PROTECTED] wrote:
so there's the question: is the GPL compatible with 
the ASL? 


Which versions?

GPL  v3 is definitely *not* compatible w/ (AFAICT,
anyway) any ASL; I'm not familiar with v3 yet. My
*impression* is that v3 is not ASLv2 compatible,
but... better minds than myself still seem to talk
about it, so who knows :/

IADNAL.

d.



   


Boardwalk for $500? In 2007? Ha! Play Monopoly Here and Now (it's updated for 
today's economy) at Yahoo! Games.
http://get.games.yahoo.com/proddesc?gamekey=monopolyherenow  


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Re: Is Struts still a better choice over JSF as on today ?

2007-07-30 Thread Frank W. Zammetti


On Mon, July 30, 2007 9:39 am, Ted Husted wrote:
 On 7/29/07, souravm [EMAIL PROTECTED] wrote:
 However, I'm still not very sure whether the design approach of Swing/VB
 is a right fit for a
  scenario where the underlying technology is http. They are good for a
 thick client
 scenario where most of the event handlings happen in client machine
 (except the events
 which has to communicate with server). So though design/development wise
 the
 component framework may help a lot (after the initial learning curve),
 efficiency wise how
 the things will perform (and of course lost of it will depend on the
 vendors implementation
 of JSF specification) is a big question to me.

Ted is spot-on with his comments, and I'm in the same situation: most of
my development is Intranet-based, the network is rarely the bottleneck
(although it's more interesting when your previously internal application
is now accessed remotely by clients, which happens often enough in my line
of work).

I wanted to mention though with regard to what you said about event
handling and bandwidth... you mentioned you had some VB experience, so
think about that experience and answer this question: when some user event
occurs, what winds up happening a large percentage of the time in a
typical app?  Let's say the user clicks a button... what does the code
behind that button do?  Does it just do some simple UI thing like enable
another button?  Or is it more times than not hitting a database and doing
some processing?

This is an important question because, at least in my experience, it's
more times than not some database call and some processing.  In that case,
there's not as much difference between that and a well-designed webapp,
*especially* if your using AJAX (and remember JSF offers AJAX capabilities
too, so it's not either-or).  The simple UI events can be handled entirely
client-side in a webapp too, making that difference not very great either.

As far as bandwidth goes, I've done a decent amount of analysis comparing
an AJAX-based application to a typical webapp and have found that the
overall bandwidth usage is actually less with an AJAX app most of the
time.  Now, where you can definitely run into issues is in too many
connections to the server, and the delay in tearing down and creating
those connections each time.  However, as with most things, better design
work can alleviate these issues to a large extent.  I'm not of the opinion
that we should push business logic onto the client, but there *is* a lot
of processing that people typically do on the server that you can do on
the client and still maintain a good design, and that helps.

The interesting thing I've found over the last year is that mindset is
more important than technology (not exactly a revelation, but it was
reinforced)... with the application I described earlier, I lead a team of
developers who didn't have any experience with AJAX, and it took probably
6 months to get them thinking differently... they were used to doing
non-AJAX webapps, so just one example, they decided for one portion to
stash a bunch of stuff in session.  All along I was telling them it wasn't
a good idea, better to keep that stuff client-side (yes, I could have
pushed things and had it done my way, but that's not the way you respect
your team IMO)... now, they got it working using session, but they've come
back around and admitted it would have been a lot easier to not use
session.  But that's just a mindset thing: if you don't trust the client
(to some extent), and you aren't used to thinking client-side, you make
those types of decisions.  I doubt there's any difference there between
JSF, Struts or anything else.  There's nothing inherently wrong with that
mindset by the way, it's just that in this day and age of richer clients,
it can lead to decisions that, while not technically wrong, aren't optimal
either.

Frank

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Re: [S2] Ajax performance optimisation

I have a very complex app using Dojo that just went live a few weeks ago 
(although *not* using S2), and this past week we got a 70+% performance 
improvement out of it.  We did three things Dojo-related.  First, we 
used a custom build (previously we just let Dojo import whatever it 
needed on the fly).  I know this is a primary suggestion the Dojo team 
makes, so I assume you've done that already.  Second, all the Dojo 
resources, all the .js, .css and image files, were moved onto the web 
server.  Third, we set expires headers for all these resources to one 
hour on Apache.


None of that is rocket science, but it made an absolutely amazing 
difference.  We're under SSL as well, and our performance right now is 
on par with what a developer sees running it locally without SSL.  It's 
absolutely stunning.


We actually moved *all* our static resources out to the web server (we 
use other libraries like ActiveWidgets, WiseBlocks and have a ton of .js 
that makes up the app itself).  We also made some other architectural 
changes, so the improvement we saw isn't strictly what we did with Dojo. 
 But, myself and another senior guy spent all week measuring and 
benchmarking and testing and I can say for sure that the biggest 
improvement was in fact the Dojo changes.


hth,
Frank

Nuwan Chandrasoma wrote:

Hi,

we also had the similar problem, we had a s1.x application with dojo and 
we did all the performance enhancements that was recommended by dojo, 
but we could not achive what we want and our application was running in 
https mode. it add more performance problem to the application.


Thanks,

Nuwan

Adam Hardy wrote:

Jason Wyatt on 27/07/07 08:55, wrote:
I've been trying to speed up the Ajax performance of our application, 
based

on the notes at http://cwiki.apache.org/WW/performance-tuning.html

I'm a bit unsure where I should extract the static content to, such 
as the

css and javascript files included by the Ajax theme (shown below):
link rel=stylesheet href=/iacd/struts/xhtml/styles.css
type=text/css/
script type=text/javascript
src=/iacd/struts/dojo/dojo.js/script
script type=text/javascript
src=/iacd/struts/simple/dojoRequire.js/script
script type=text/javascript
src=/iacd/struts/ajax/dojoRequire.js/script
script type=text/javascript
src=/iacd/struts/CommonFunctions.js/script


For example, the styles.css file above is stored in the
struts2-core-2.0.8.jar under the path /template/xhtml.
But if I extract this file to the webroot/template/xhtml, it seems 
that the

link in the code above won't work, so I should instead extract it to
webroot/struts/xhtml.

Is this understanding correct? Basically I'm wondering how the 
mapping works
between the template folder in the jar file and the struts folders 
mentioned

in the Ajax theme's code.



Looks like a servlet filter declared in the web.xml would pick up 
anything with /struts/* and handle it from there but I don't see it 
mentioned in a casual check of the wiki so it could be some other 
mechanism.


I spent about a week trying to get dojo to perform better the way we 
were using it, and for the performance we required then, we worked out 
we couldn't afford any more than a dozen dojo widgets on a page, even 
with all the dojo performance enhancements recommended by dojo.


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Frank W. Zammetti
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Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [S2] Ajax performance optimisation


Nuwan Chandrasoma wrote:

Hi Frank,

First of all thanks for these tips.., we did the custom dojo build 


For anyone reading, this is an especially important tip if your app is 
being access on a WAN or public Internet.  Our app is a backoffice app, 
but we have a lot of people coming in over VPN to use it, and that's 
where we saw a large hit by not using the custom build option because 
Dojo is very chatty in terms of loading its resources otherwise.


 ... and
parseWidget tag setting also. 


Also a big hitter.  We had widget parsing turned off already, but before 
we did some months back you could definitely see the hit you take for 
that.  Remember that Dojo gives you the ability to parse the entire DOM 
tree, or just specific portions of it, so if your using markup-based 
creation of widgets, I definitely suggest you look at targeting the 
widget parsing as much as possible.


 ...but we havent done the 2nd and 3rd tips
you have given here., i have a small doubt when it comes to moving 
static resource to the web server. will there be any problem when it 
comes to having http and https content together? i don't have much 
experience when it comes to web servers like apache


Interesting question, and I'm not sure... I'd suspect IE especially 
might be a problem because it's famous for the do you wish to access 
this unsecured content from a secure location? dialog, which I think 
you can't get rid of no matter what you do.  I'm not sure here, might be 
worth some time to experiment and see what happens.



Thanks,

Nuwan


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [S2] Ajax performance optimisation


Martin Gainty wrote:

Hi Frank-

My apologies for jumping in the middle of a thread


No need to apologize, I did the same thing! LOL


-could you elaborate on what you used for a 'custom build'?


Yes... Dojo supports the ability to create a custom build, where you get 
a dojo.js file out that contains only the code you need.  The Dojo wiki 
details this, but it's little more than creating a profile.js file, 
which tells the build process what to include, and then running an Ant 
script.  I have to say that it took me a while to get it to work, I had 
various problems along the way, but it ultimately works pretty much as 
described in their documentation.


My custom build by the way includes the io functionality, and the menu, 
button, calendar, tab and floatpane widgets, plus whatever packages (fx, 
core, etc.) these things require.



-which webserver are you implementing?


Apache, in front of WebSphere... I'm afraid I can't go into much more 
detail than that as we're in a hosted environment, so I'm not in charge 
of the configurations.


-where you able to collect metrics for scenarios other than expire 
headers of 1 hour..perhaps 2 hours?


No, we debated various times but settled on one hour because that seemed 
a reasonable period of time to account for JS changes (our own app JS 
really)... we figured images weren't terribly important if something 
changed, we could deal with a bit of ugliness for an hour :) but JS 
changes would obviously break stuff.



Kudos for attaining astounding 70% performance increase!!!


Thanks :)  The early days of last week were really rough, trying to 
figure out where we were truly losing time, but the last two days were 
very rewarding indeed.



Thanks,
M--


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: [S2] Ajax performance optimisation

In our case, it's not the initial load that was killing us... well, it 
*was* a little too long (and we have a very nice Please Wait with 
spinning gears and such during that period)... the problem is the 
underlying requirements for the application.  Let me try and give a 
brief background (although you've been around here long enough and seen 
my posts to know I can't say *anything* briefly!)


The app is a back-office replacement for a number of different apps... 
things like CRM, account creation, workflow, imaging system, etc.  Each 
of these is sort of a separate module in the app.   Each module further 
has a left and right-hand sides, the left-hand side has a variable 
number of tabs on it, each loaded individually, and the right-hand side 
typically has an image viewing applet in it, although sometimes has 
other things like search results, more data entry forms, etc.


The one requirement that's really been tough is that each of these 
modules the user needs to be able to flip between at any time with no 
real delay (at least no delay after the first time they load the 
module).  So, a typical use case might be creating a new account in the 
new account module, and then being able to flip to the image view module 
to see the image of the scanned documentation for the new account 
application.


The way we did this, the only way we could to really meet the 
requirements I think, is that we have a bunch of common JS that loads 
up-front, which basically represents the overarching client-side 
framework.  Then, each module is in an iFrame, but within each there's a 
ton of stuff that has to get loaded, some of it duplicate portions of 
the framework (although that's been minimized of course), and including 
Dojo in each one.  For the most part, once a module is loaded it doesn't 
fully get loaded again, we just flip one iFrame visible while the others 
are hidden, that sort of thing.  But there *are* a few instances where a 
module has to get reloaded.


Now, here's the part that really spurned the need to improve 
performance... we have an existing VB-based imaging application that 
we're not ready to move off of completely... this imaging app has the 
full suite of hooks into the workflow, the long and short of it is that 
from the VB app, a user clicks a button when they select a work item 
from a queue, which launches our web app.  So, the initial load of the 
web app is maybe 5-7 seconds, not a big deal.  Then to load the module 
that automatically gets started in that case takes about 8-10 seconds. 
Then it has to load an image in an applet, which is another few seconds. 
 All in all it's roughly 20 seconds from fat-client to webapp loaded.


But, before the mods this past week, it was more like 45-50 seconds, 
sometimes more (I think we actually managed to get it closer to 10-15 
seconds overall on Friday, getting us to around that 70% improvement I 
mentioned, give or take a bit).


You actually see that please wait display when the module is loading 
too, and from fat-client to webapp it's actually showing the whole time. 
 Before the mods, you can see why Dojo was a problem: it wasn't just 
loading once, it was loading multiple times!  And because of the 
fundamental architecture of the app, there wasn't much choice in the 
matter (I've toyed with just loading it in the parent frame, but that 
doesn't seem possible since the iFrames need a lot of it, and you start 
getting into tons of scoping issues).


I should also point out that one of the other changes I made that had a 
big impact was not using Dojo buttons any longer... I basically built a 
new button widget and wrapped it in a taglib.  The problem there was 
that each of those tabs I mentioned gets loaded via AJAX, and then any 
script blocks in it is executed.  When we disabled the Dojo widget 
parsing, we lost the ability to use markup to generate Dojo buttons, so 
I created a very thin taglib wrapper that spit out a script block to 
programmatically generate the Dojo button.  This, it turns out, executes 
a lot faster than the widget parsing (I should also mention we're using 
Dojo 0.3.1 because it would be a major hassle to upgrade now)... the 
problem, which I'd bet you can guess, is that if you have a tab with 
numerous buttons, which we did in some cases, executing all that 
Javascript and manipulating the DOM (creating the Dojo buttons) wound up 
being as slow as using widget parsing, maybe even slower.


So now, the button widget and taglib I created doesn't spit out 
Javascript, the buttons are a lot simpler, and don't need to be created 
programmatically.  This gained us 3-5 seconds alone.


Ok, see, I'm genetically incapable of giving a short answer to anything 
:)  To answer your question, the initial load *is* long enough to 
warrant a please wait message, and we have one, and actually have from 
the start :)


Frank

Adam Hardy wrote:

Frank W. Zammetti on 28/07/07 16:10, wrote:

Martin Gainty wrote:
-where you able

Re: [OT] Re: Is Struts still a better choice over JSF as on today ?

2007-07-26 Thread Frank W. Zammetti

Not nearly as good would be my guess :)

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Thu, July 26, 2007 2:19 pm, Antonio Petrelli wrote:
 2007/7/26, Frank W. Zammetti [EMAIL PROTECTED]:
 (this was a case of the generated code having to be mucked
 with to get it right, and it turned into a big, heaping plate of
 spaghetti
 in the process).

 I always wonder what kind of spaghetti have you got outside of Italy :-D

 Antonio

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RE: Is Struts still a better choice over JSF as on today ?

2007-07-26 Thread Frank W. Zammetti

On Thu, July 26, 2007 1:23 pm, souravm wrote:
 For me so far I don't see any reason why people should go for JSF except
 for moving ahead with a standard. As such I don't even see much use of
 event handling at UI layer - I always like to keep UI layer simple.

But remember that something can be a standard and still not be
successful... I wouldn't say that EJBs were unsuccessful, but it's
certainly true that people were looking for alternatives almost from the
beginning.  Witness how quickly Spring gained popularity for instance
(note that I'm talking pre-EJB3, which seems to have gotten a ton better).

As for event handling on the UI, I do have to disagree there.  I think
when you start doing a lot of RIA work, event handling is a big
consideration.  It's one of the reasons I eased up on my JSF criticisms
some months ago... while I still think there's better alternatives, it
does offer some value in that area, and I think it's an important area.

 Now knowing that you have already seen some projects where JSF was used
 here are my couple of Qs -

 a) What made them to go for JSF ?

I've seen three projects that went with JSF, none of which I was involved
in day-to-day development on... with one I know the decision was simply as
you said, because JSF is a standard, and someone thought that was enough
of a reason to go with it :)  I can tell you that while that project
ultimately delivered, it had a ton of pain along the way, more so than if
it had gone with something better known, that was the conclusion at the
end.  I wasn't intimately involved with that project so I don't know all
the details, but I do know that some developers I trust said JSF was a
headache for them the whole time, even when the learning curve was
overcome (that's not necessarily a criticism of JSF mind you, it may well
be that it just wasn't the right choice for that particular case).

The other two projects went with JSF because the idea of a component-based
framework is attractive to many (myself included for the most part).  They
generally went alright, no huge complaints or anything.  I was again not
involved in day-to-day development of those, but I didn't hear any big
complaints.  Interestingly, one of them is now being rewritten using AJAX
under Struts 1.2.7 and using a handful of component libraries (YUI, Dojo
and APT).  The reason for the rewrite: the JSF version had become a pain
to maintain (this was a case of the generated code having to be mucked
with to get it right, and it turned into a big, heaping plate of spaghetti
in the process).  This again isn't necessarily a criticism of JSF because
it may well be that it just wasn't developed well in the first place, but
these are the facts of the case, draw what conclusions from it you may :)

The one conclusion I draw from this last experience is that if you use RAD
tools and are fortunate enough to never have to mess with the code, JSF is
probably no worse than anything else, and probably has some nice benefits.
 The first time you have to touch the code though, you may be heading down
a road you don't want to travel.  Me, I don't trust *any* tool to generate
code *that* much!

 b) What type of RAD tool was used (if at all) ?

One of them used no RAD tools at all (interestingly, it was the one that
seemed to go the smoothest and isn't be rewritten), the other two used
Java Studio Creator.  I can't give you any meaningful feedback on that
tool though... I've played with it a little, didn't think anything
particularly good or bad about it from that admittedly limited experience.
 I'm very much a text editor kind of guy, so my opinions are frankly
tainted by experience hand-coding JSF (which, to be honest, hasn't been
all *that* bad really, but I've never done a truly substantial JSF
application personally, I've only watched others do so).

 Regards,
 Sourav

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Is Struts still a better choice over JSF as on today ?

2007-07-26 Thread Frank W. Zammetti

souravm wrote:
Regarding going for JSF due to componentization, I'm again not sure what additional componentizations JSF does compared to struts.

JSF is inherently a component-based framework, meaning you aren't really
thinking in terms of pages, your thinking in terms of components of a
view. Struts doesn't really offer this, although S2 gets closer to it
in many ways (and yes, there's some JSF support in S2 is you want it,
although I'm not too familiar with it myself).

Apart from the fact that JSF does not need a layer like Action
Classes, all other components (validator, managed bean, html tag libs
etc.) are already there in Struts. May be I'm missing something here.

I think your looking at the pieces and comparing them rather than
looking at the overarching paradigm of one framework vs. the other. The
distinction has been diminished a bit with S2, but it's still there.

A component-based approach means your looking at individual elements
that make up a a particular view and thinking in terms of the
interactions the user can have with each. You don't think in terms of
state transitions, you think in terms of events.

With Struts, it's about state transitions. The user submits a form and
transitions to a new application state entirely. I'm throwing AJAX out
of this for the moment of course :)

Also, I'm yet to appreciate the real value add event handling mechanism of JSF can bring in a web application scenario.

It's the ease, in theory, that it provides, and the fact that your
inherently thinking along those lines, rather than shoe-horning it in.
That's the value-add IML (in theory!)

Especially given the fact that all those events (associated with a
single http request) would be fired only in a sequential way at server
side.

I'm not quite sure what you mean by that...

I really cannot think a usage scenario of multiple event handler feature
of JSF. Even in case of RIAs, I believe what is more required feature is
dynamic loading of part of a html page (which is currently the space
where AJAX is becoming popular). So any further explanation/example on
how you have found this feature of JSF to be useful for RIAs would be
helpful for me to understand your point.

It's not just about partial page loads, although that's clearly a big
part of it. As I was describing before, it's more about the approach to
developing the application.

Are you familiar at all with Visual Basic? If so, let me try and make
this analogy... working with JSF is more akin to developing in VB than
in Struts because your creating a given view that is a collection of
components, and then determining what events each component can trigger,
and coding for them. When you write a VB app, you aren't typically
thinking in terms of this form leads to that form which leads to another
form (unless your talking a wizard flow, but that's a specialized case).
With Struts, it's always about a transition from one view to another,
from one form to another in VB, triggered by some user input (again,
putting AJAX aside for the moment). The VB paradigm, is frankly more
logical to most developers. It's more like Swing too if you think about it.

Now *with* AJAX in the mix, and with client-side component libraries
coming fast and furious, a lot of what made JSF potentially attractive
has, again IMO, been significantly diminished. People have realized
that you don't need the full JSF stack, so to speak, and you can do
components without JSF too, so maybe it's not as valuable. Now, JSF
still provides value there because it gives you a standardized component
model, something that is sorely lacking in client-side component
libraries these days (i.e., Dojo widgets and YUI widgets and APT widgets
aren't generally compatible, and certainly aren't designed to some
common pattern).

That's kind of what's happened in Struts land too... there's been a bit
of a melding of the component paradigm and the non-component paradigm,
largely with AJAX as the catalyst.

Regards,
Sourav

Frank

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Re: Is Struts still a better choice over JSF as on today ?

2007-07-25 Thread Frank W. Zammetti


souravm wrote:
Will you consider Struts to be a better choice today compared to JSF ? 


In *most* cases, for me, yes I would, but that's just my opinion, and 
I'm about to invalidate it at the end of this :)


 Especially, given the fact that JSF has better controller 
flexibility, event handling capability and ease of development using a 
RAD tool ?


I don't think any of those facts are givens in any way, shape or 
form.  You could convince me event handling is better, maybe, but not 
the other two.


Controller flexibility is AT BEST a wash in my opinion (which is what 
you asked for), especially when your talking about S2.  The interceptor 
stacks and result types, I believe, gives you just about all the 
flexibility you could ask for, and it's far from rocket science.  Even 
with S1 you now have a chain-based request processor, and that gives you 
a ton of flexibility it you choose to use it.


As for ease of development with a RAD tool, you may well be right there, 
but to me, a big part of development is maintenance over time, and any 
time you have to rely on tooling to create an application, even in part, 
your asking for trouble down the road.  Besides, I've heard stories of 
people who have used those RAD tools you speak of, only to find that 
they spend just as much time mucking around with the code they generate 
to get it to do exactly what they want/need as they would have spent 
just hand-coding is all in Struts.  In the end, they saved little or no 
time, and possibly even wound up costing themselves some in the worst cases.


At the end of the day though, my belief still stands: look at your 
requirements and choose the right tool for the job.  I used to be pretty 
strongly anti-JSF, but I've calmed down considerably... at this point 
I'm simply indifferent to it.  I've had a couple of instances where JSF 
was seriously considered as a platform for a project, and I would have 
had little trouble going with it and working with it, there just wound 
up being some factors that made other choices be judged as better for 
the given situation.  You should always do that, it's not just a matter 
of this or that is better than this or that in absolute terms, you can't 
make a general statement like that in my opinion.  Don't use JSF because 
it's the standard, don't use Struts because it's the most popular 
still after all this time, use one or the other (or something else 
entirely!) because it suits your needs better than the other for a given 
project, simple as that.



Regards,
Sourav


Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Rendering an image into s:div from ajax

2007-07-13 Thread Frank W. Zammetti

In general with AJAX this isn't possible... there's no way at present to
insert binary data, be it an image, PDF, whatever, into the page, and have
the browser render it.

What you would have to do is return HTML instead, which includes an img
tag pointing to the image on the server, which in this case would be your
chart, written out somewhere with some ID.  For instance, you might write
it to a database, using some unique identifier for the user as a key, and
then your img tag points to an Action, with the ID as a query string,
that retrieves the image from the database based on the ID.

So it would go something like:

User clicks generate chart button -- Server generates chart, writes to DB
--- Return HTML like img src=getChart.action?id=1234/ -- HTML
inserted into page, browser requests getChart.action to get image, which
is an Action, not an image -- Action retrieves image from DB and returns
it -- Chart displayed

Frank

-- 
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

On Fri, July 13, 2007 9:54 am, travers wrote:

 Hi is it possible to specify href in s:div to render content as an image
 ?
 I have a struts2 action returning a JfreeChart chart as png.

 Without ajax, image src=/chart/ViewChart.action/ shows the chart
 correctly, but the following renders it as text (well actually the binary
 stuff inside the png)

 s:url id=ajaxCallUrl value=/chart/ViewChart.action/
  s:div theme=ajax
href=%{ajaxCallUrl} loadingText=Loading Chart...
  /s:div

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 http://www.nabble.com/Rendering-an-image-into-%3Cs%3Adiv-from-ajax-tf4074632.html#a11580059
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Re: Struts 2 performance


Dunno if this might help, but:

http://www.omnytex.com/struts_benchmarking.zip

In it you'll find two applications, one for S1 (1.3.8) and one for S2 
(2.0.8)... they are both (I think!) pretty much equivalent, and about as 
simplistic as you can get.  Also included is a JMeter test plan to run 
against them (just disable one or the other thread group, wouldn't want 
to test them both at the same time!).


Just ran a quick-and-dirty comparison of the two using the test plan... 
I ran 100 users with no ramp-up... local Tomcat instance (6.0.13)... the 
one difference is that the S1 version was compiled with JDK 1.4.2, and 
the S2 version with 1.6.0, so there's at least one potentially big 
variance right up front... here's what I saw:


S1 results:
4256 samples, 913 average, 108.6/sec throughput, 16.01 KB/sec

S2 results:
4165 samples, 1974 average, 50.0/sec throughput, 7.38 KB/sec

I'm not claiming this to be the perfect test, nor do I believe there's 
not some flaws in there (benchmarking is always a tough thing to get 
quite right, especially trying to do a comparison like this)... but, 
unless someone can point out some obvious mistakes I made, the numbers 
don't lie: S2 *looks*, *on the surface* at least, to be inherently twice 
as slow as S1.


I'm not trying to make any sensational claims here, and again, I may 
have totally blown it in the first place (I did throw this together in 
about 30 minutes after all), but if we can use this as a basis going 
forward, maybe build it up as a more expansive, realistic and solid 
benchmarking suite, then it's all good in the end.


Anyway, it's there, if anyone's interested.

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

Ing. Andrea Vettori wrote:


Il giorno 12/lug/07, alle ore 16:31, Guillaume Carré ha scritto:


2007/7/12, Ing. Andrea Vettori [EMAIL PROTECTED]:

Compared to nothing... they are pure numbers. They are simply just
good enought (to me).

If we don't have this in mind we should use assember for everything :)


what I meant was: maybe it could be a good idea to redevelop your
screens with, say struts 1 for example, and compare the results


 I can't do that... simply don't have the time... :)



In the high load test, after 10 seconds you have about 90 users (the
other 10 should have finished). Having a response time of 2,5 seconds
for a db search and result display under such load seems very good to
me.

Don't you ?


it depends :-)

2.5s doesn't say much to me, I would need to know how much time is
consumed in your DB requests, how much time is consumed in your
service layer, etc etc.

Is it 90 users really active at the same time, meaning using 90
threads on the server?if it is, do you have at least 90 connections in
your pool?
or did you put think times in your tests?




No think time...

I have 250 threads but I have a limit of 50 connections on my pool. I'll 
try to raise

the number of maximum connection to see if the MP3 list test gets better.

However I think that struts alone is performing well for my app; don't 
know if it's because

i'm using only few OGNL expressions on my jsp pages.

--
Ing. Andrea Vettori
Consulente per l'Information Technology



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Re: Struts 2 performance

The build scripts and full source are of course included, so by all 
means feel free to recompile and rerun... I'm getting into something 
else at the moment otherwise I'd do it right now because I'd be very 
interested in seeing if the results converge a bit (I wouldn't expect 
them to diverge, that's for sure!).


Frank

James Holmes wrote:

My only point was that the S1 and S2 apps should be compiled using the same
version of Java. I didn't mean to imply any version that S2 should support. I
guess in a perfect world the test should be compiled with 1.5 since that is what
S2 supports.

James


On Thu Jul 12 15:34 , Ted Husted  sent:


Are we targeting 1.6 now, or is the S2 target platform still 1.5?

-T.

On 7/12/07, James Holmes [EMAIL PROTECTED] wrote:

Perfect! This is an excellent start.

I think both should be compiled with 1.6.0. That will immediately remove that
element of difference between the two.

James




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--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Struts 2 performance


Well, here's exactly why I hate benchmarking: it's never consistent! :)

This time, everything compiled with JDK 1.6 (it's what I have installed 
along side 1.4.2) and all used 5000 samples (updated test plan to always 
do 5000 samples)...


S1:
685 average, 142.3/sec throughput, 20.89 KB/sec

So, an improvement there, maybe because of the JDK, maybe not.

S2 w/OGNL 2.6:
1054 average, 87.3/sec throughput, 12.87 KB/sec

That's better than the last run, but for no apparent reason!

S2 W/OGNL 2.7:
1073 average, 85.8/sec throughput, 12.65 KB/sec

Wuh?!?  Ok, I think we can most likely dismiss the difference as within 
a statistical margin of difference, which means either (a) these tests 
are just flat-out flawed somehow, (b) the OGNL bump, at least as far as 
just a straight drop-in, makes no real difference, or (c) OGNL isn't 
being used to enough of an extent in this test to notice a difference 
(I'm frankly betting on that one).


FYI, I've created JIRA ticket WW-2040... that way if others want to 
extend the apps, they can attach an updated version to the ticket so 
everyone can share.


Frank

cilquirm wrote:

Frank, would you care to give the same tests a shot with  ognl 2.7 and
javassist in the mix.

Although none of this is purely scientific, at least evaluations on that
regard give us some level of subjective information.
 
The ognl 2.7 and javassist jar are available via the tapestry-4.2-libs

download :

http://tapestry.apache.org/download.html





Frank W. Zammetti wrote:

Dunno if this might help, but:

http://www.omnytex.com/struts_benchmarking.zip

In it you'll find two applications, one for S1 (1.3.8) and one for S2 
(2.0.8)... they are both (I think!) pretty much equivalent, and about as 
simplistic as you can get.  Also included is a JMeter test plan to run 
against them (just disable one or the other thread group, wouldn't want 
to test them both at the same time!).


Just ran a quick-and-dirty comparison of the two using the test plan... 
I ran 100 users with no ramp-up... local Tomcat instance (6.0.13)... the 
one difference is that the S1 version was compiled with JDK 1.4.2, and 
the S2 version with 1.6.0, so there's at least one potentially big 
variance right up front... here's what I saw:


S1 results:
4256 samples, 913 average, 108.6/sec throughput, 16.01 KB/sec

S2 results:
4165 samples, 1974 average, 50.0/sec throughput, 7.38 KB/sec

I'm not claiming this to be the perfect test, nor do I believe there's 
not some flaws in there (benchmarking is always a tough thing to get 
quite right, especially trying to do a comparison like this)... but, 
unless someone can point out some obvious mistakes I made, the numbers 
don't lie: S2 *looks*, *on the surface* at least, to be inherently twice 
as slow as S1.


I'm not trying to make any sensational claims here, and again, I may 
have totally blown it in the first place (I did throw this together in 
about 30 minutes after all), but if we can use this as a basis going 
forward, maybe build it up as a more expansive, realistic and solid 
benchmarking suite, then it's all good in the end.


Anyway, it's there, if anyone's interested.

Frank

--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
  (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
  (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
  Supplying the wheel, so you don't have to reinvent it!

Ing. Andrea Vettori wrote:

Il giorno 12/lug/07, alle ore 16:31, Guillaume Carré ha scritto:


2007/7/12, Ing. Andrea Vettori [EMAIL PROTECTED]:

Compared to nothing... they are pure numbers. They are simply just
good enought (to me).

If we don't have this in mind we should use assember for everything :)

what I meant was: maybe it could be a good idea to redevelop your
screens with, say struts 1 for example, and compare the results

 I can't do that... simply don't have the time... :)



In the high load test, after 10 seconds you have about 90 users (the
other 10 should have finished). Having a response time of 2,5 seconds
for a db search and result display under such load seems very good to
me.

Don't you ?

it depends :-)

2.5s doesn't say much to me, I would need to know how much time is
consumed in your DB requests, how much time is consumed in your
service layer, etc etc.

Is it 90 users really active at the same time, meaning using 90
threads on the server?if it is, do you have at least 90 connections in
your pool?
or did you put think times in your tests?



No think time...

I have 250 threads but I have a limit of 50 connections on my pool. I'll 
try to raise

the number of maximum connection to see if the MP3 list test gets better.

However I think that struts alone is performing well for my app; don't 
know if it's because

i'm using only few OGNL expressions

Re: Struts 2 performance


Ted Husted wrote:

On 7/12/07, Frank W. Zammetti [EMAIL PROTECTED] wrote:
(b) the OGNL bump, at least as far asjust a straight drop-in, makes no 
real difference


I don't think we really expected the drop-in to make a difference
without making other adjustment to take advantage of the enhancements.


Yeah, that's the understanding I had from all the comments, just thought 
it was worth saying in case anyone did have that expectation.



-T.


Frank


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--
--
Frank W. Zammetti
Founder and Chief Software Architect
Omnytex Technologies
http://www.omnytex.com
AIM/Yahoo: fzammetti
MSN: [EMAIL PROTECTED]
Author of Practical Ajax Projects With Java Technology
 (2006, Apress, ISBN 1-59059-695-1)
and JavaScript, DOM Scripting and Ajax Projects
 (2007, Apress, ISBN 1-59059-816-4)
Java Web Parts - http://javawebparts.sourceforge.net
 Supplying the wheel, so you don't have to reinvent it!

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Re: Struts 2 performance