Re: JSP/Servlet --EJB
But is this the way a JSP calling EJB?
the examples is just a JB, not EJB
On Fri, 23 Nov 2001, Ludovic Maitre wrote:
you can instantiate a bean from a JSP page with the jsp:use-bean
statements as mentionned in the example packaged with tomcat 4 (and 3).
For more informations read the fine manual or specification of JSP on
the Sun website (their tutorial are also very good).
in tomcat 4, file webapps/examples/jsp/checkbox/checkresult :
%! String[] fruits; %
jsp:useBean id=foo scope=page class=checkbox.CheckTest /
jsp:setProperty name=foo property=fruit param=fruit /
hr
The checked fruits (got using request) are: br
%
fruits = request.getParameterValues(fruit);
%
ul
%
if (fruits != null) {
for (int i = 0; i fruits.length; i++) {
%
...
regards,
Ludovic.
Huaxin wrote:
A little bit off topic, sorry about that.
I see most of the examples using EJB from Servlet.
However, is there any example of using JSP with
EJB directly? (without too much scriplet, and
hopefully more efficient than create a bean to
interact with the EJB)
thanks a lot
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AW: JSP/Servlet --EJB
You can e.g. define a tag on your own that makes a lookup and a call to an
EJB whereas I believe it ain't gotta be well designed.
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-Ursprüngliche Nachricht-
Von: Huaxin [mailto:[EMAIL PROTECTED]]
Gesendet: Freitag, 23. November 2001 17:19
An: Tomcat Users List
Betreff: Re: JSP/Servlet --EJB
But is this the way a JSP calling EJB?
the examples is just a JB, not EJB
On Fri, 23 Nov 2001, Ludovic Maitre wrote:
you can instantiate a bean from a JSP page with the jsp:use-bean
statements as mentionned in the example packaged with tomcat 4 (and 3).
For more informations read the fine manual or specification of JSP on
the Sun website (their tutorial are also very good).
in tomcat 4, file webapps/examples/jsp/checkbox/checkresult :
%! String[] fruits; %
jsp:useBean id=foo scope=page class=checkbox.CheckTest /
jsp:setProperty name=foo property=fruit param=fruit /
hr
The checked fruits (got using request) are: br
%
fruits = request.getParameterValues(fruit);
%
ul
%
if (fruits != null) {
for (int i = 0; i fruits.length; i++) {
%
...
regards,
Ludovic.
Huaxin wrote:
A little bit off topic, sorry about that.
I see most of the examples using EJB from Servlet.
However, is there any example of using JSP with
EJB directly? (without too much scriplet, and
hopefully more efficient than create a bean to
interact with the EJB)
thanks a lot
--
[EMAIL PROTECTED]
INRIA - 2004 route des lucioles - BP 93Tel: (33/0) 4 92 38 50 41
06902 SOPHIA-ANTIPOLIS cedex (France)Fax: (33/0) 4 92 38 76 02
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To unsubscribe: mailto:[EMAIL PROTECTED]
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Re: JSP/Servlet --EJB
you can instantiate a bean from a JSP page with the jsp:use-bean
statements as mentionned in the example packaged with tomcat 4 (and 3).
For more informations read the fine manual or specification of JSP on
the Sun website (their tutorial are also very good).
in tomcat 4, file webapps/examples/jsp/checkbox/checkresult :
%! String[] fruits; %
jsp:useBean id=foo scope=page class=checkbox.CheckTest /
jsp:setProperty name=foo property=fruit param=fruit /
hr
The checked fruits (got using request) are: br
%
fruits = request.getParameterValues(fruit);
%
ul
%
if (fruits != null) {
for (int i = 0; i fruits.length; i++) {
%
...
regards,
Ludovic.
Huaxin wrote:
A little bit off topic, sorry about that.
I see most of the examples using EJB from Servlet.
However, is there any example of using JSP with
EJB directly? (without too much scriplet, and
hopefully more efficient than create a bean to
interact with the EJB)
thanks a lot
--
[EMAIL PROTECTED]
INRIA - 2004 route des lucioles - BP 93Tel: (33/0) 4 92 38 50 41
06902 SOPHIA-ANTIPOLIS cedex (France)Fax: (33/0) 4 92 38 76 02
--
To unsubscribe: mailto:[EMAIL PROTECTED]
For additional commands: mailto:[EMAIL PROTECTED]
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JSP/Servlet --EJB
A little bit off topic, sorry about that. I see most of the examples using EJB from Servlet. However, is there any example of using JSP with EJB directly? (without too much scriplet, and hopefully more efficient than create a bean to interact with the EJB) thanks a lot
Re: JSP/Servlet --EJB
On Wed, 11 Sep 2002, Huaxin wrote: Date: Wed, 11 Sep 2002 18:53:04 -0600 (Mountain Daylight Time) From: Huaxin [EMAIL PROTECTED] Reply-To: [EMAIL PROTECTED] To: Tomcat User List [EMAIL PROTECTED] Subject: JSP/Servlet --EJB A little bit off topic, sorry about that. I see most of the examples using EJB from Servlet. However, is there any example of using JSP with EJB directly? (without too much scriplet, and hopefully more efficient than create a bean to interact with the EJB) You could use beans or custom tags to interact with an EJB from inside a JSP page. However, wanting this leads me to believe that you wish to intermix business logic and presentation logic in the page -- a practice that is discouraged by the Model 2 architectural approach recommended by most web application frameworks. An example of a framework that lets you maintain this separation is Struts http://jakarta.apache.org/struts/. thanks a lot Craig
Re: JSP/Servlet --EJB
Huaxin wrote: A little bit off topic, sorry about that. I see most of the examples using EJB from Servlet. However, is there any example of using JSP with EJB directly? (without too much scriplet, and hopefully more efficient than create a bean to interact with the EJB) thanks a lot Every JSP eventually becomes a servlet, so there shouldn't be any technical difficulties in doing that. But, is this really the design you want to have? Embedding EJB call machinery into JSP will make the code contain a lot of the stuff that has nothing to do with presentation. Unless, of course, you're using the JSP's for non presentational purposes here... But if you do, then straight servlets or beans are a better choices anyway, therefore the lack of examples :-) Here is an article that explains the Model 2 architecture: http://www.javaworld.com/javaworld/jw-12-1999/jw-12-ssj-jspmvc.html Bojan
Re: JSP/Servlet --EJB
Thanks Craig and Bojan I always kept the module 2 in mind, as well as efficiency. Using JSP for presentation, forward request to Servlet, then forward to EJB, and the same procedure back involves lots of overhead. Using JSP for presentation, invoke a JSP bean, and from that bean to EJB... I think this is also module 2, but may be faster. Using JSP for presentation, doing something else to EJB.. ? I am eager to see this example. If it is not available, I would like to see some examples of the JSP--JPS Bean--EJB solution. Thanks again On Wed, 12 Sep 2001, Bojan Smojver wrote: Huaxin wrote: A little bit off topic, sorry about that. I see most of the examples using EJB from Servlet. However, is there any example of using JSP with EJB directly? (without too much scriplet, and hopefully more efficient than create a bean to interact with the EJB) thanks a lot Every JSP eventually becomes a servlet, so there shouldn't be any technical difficulties in doing that. But, is this really the design you want to have? Embedding EJB call machinery into JSP will make the code contain a lot of the stuff that has nothing to do with presentation. Unless, of course, you're using the JSP's for non presentational purposes here... But if you do, then straight servlets or beans are a better choices anyway, therefore the lack of examples :-) Here is an article that explains the Model 2 architecture: http://www.javaworld.com/javaworld/jw-12-1999/jw-12-ssj-jspmvc.html Bojan
