RE: xsp session logicsheet
Hi Cyril,
try adding
xmlns:session=http://apache.org/xsp/session/2.0;
namespace to your xsp page. Then have a look at the generated code.
Basically you should see a java variable (object) named session, with it
you can do what you want. No need to declare it, cocoon does it for you.
Roman
-Original Message-
From: Cyril Vidal [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 05, 2003 11:01 AM
To: [EMAIL PROTECTED]
Subject: Re: xsp session logicsheet
Thanks for you response.
hum, I guess actions are still a little bit too complex for me, regarding my
knowledge of Cocoon...
Isn't it really possible to add merely values to the same session's
attribute with the ESQL logicsheet? It sounds odd...
Cyril.
Hi Cyril
Why don't use an action, I think it's better not to have too much Java
code
in your xsp-pages.
In an action you can take your code as it is.
Cheers
Beat
Hi,
I would like to deal with session through xsp, and serve as far as
possible
the same goal as with the following servlet: e.g put all the parameters
named 'item' in the object of type Vector 'items' bound to the current
session, so that it would be possible to list at any time all of the
items
chosen so far by the client in his session.
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType(text/html);
PrintWriter out = res.getWriter();
// Get the current session object, create one if necessary.
HttpSession session = req.getSession(true);
// Cart items are maintained in the session object.
Vector items = (Vector)session.getAttribute(cart.items);
if (items == null) { items = new Vector(10,5);}
String item = req.getParameter(item);
items.add(item);
session.setAttribute(cart.items,items);
out.println(HTMLHEADTITLESessionTracker
modifie/TITLE/HEAD);
out.println(BODYH1Session Tracking Demo/H1);
// Print the current cart items.
out.println(You currently have the following items in your
cart:BR);
if (items == null) {
out.println(BNone/B);
}
else {
out.println(UL);
for (int i = 0; i items.size(); i++) {
out.println(LI + items.get(i));
}
out.println(/UL);
}
out.println(/BODY/HTML);
}
}
Below is the xsp i've written for the moment,: this is working fine,
but
does not do what I want: because each time the client chooses an item
and
pass it via the parameter 'item', instead of being added in the object
cart.items, its value overrides this of the preceding parameter.
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
html
xsp-session:set-attribute name=cart.itemsxsp-request:get-parameter
name=item//xsp-session:set-attribute
bYou currently have the following items in your cart:/b
xsp-session:get-attribute name=cart.items/
br/
bYour session was created:/b xsp-session:get-creation-time
as=string/
/html
/xsp:page
Some of you would know how I can improve my code? Indeed, I would like
cart.items to be like a Vector, so that it would be possible to put
merely
values onto it.
Thanks in advance for your help,
Cyril.
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Re: xsp session logicsheet
Hi Roman,
Indeed I've done this:
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
html
xsp-session:set-attribute name=cart.itemsxsp-request:get-parameter
name=item//xsp-session:set-attribute
bThe list of items is:/b xsp-session:get-attribute name=cart.items
default=not set/
br/
bYour session was created:/b xsp-session:get-creation-time
as=string/
/html
/xsp:page
My problem is the following: I would like to add items to the attribute's
session 'cart.items'.
For the moment, the preceding code doesn't do this task.
When I call http://localhost:8080/cocoo/mount/try/session.xsp?item=3
I receive the following html result:
The list of items is: 3
Your session was created: Wed Feb 05 13:41:32 CET 2003
when I then call http://localhost:8080/cocoo/mount/try/session.xsp?item=5
The result is the following:
The list of items is: 5
Your session was created: Wed Feb 05 13:41:32 CET 2003
and of course, I would like
The list of items is: 3, 5
Your session was created: Wed Feb 05 13:41:32 CET 2003
What i would like to know : is it possible to achieve this task by using
Session Logicsheet by itself, does this Logicsheet provides this
functionnality?
If not, the alternative is also to use actions, as suggested in this thread
before?
Is a built-in action available for this, or do I have to build one from
scratch?
Any help or hint would help me,
Thanks,
Cyril.
Hi Cyril,
try adding
xmlns:session=http://apache.org/xsp/session/2.0;
namespace to your xsp page. Then have a look at the generated code.
Basically you should see a java variable (object) named session, with it
you can do what you want. No need to declare it, cocoon does it for you.
Roman
-Original Message-
From: Cyril Vidal [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 05, 2003 11:01 AM
To: [EMAIL PROTECTED]
Subject: Re: xsp session logicsheet
Thanks for you response.
hum, I guess actions are still a little bit too complex for me, regarding
my
knowledge of Cocoon...
Isn't it really possible to add merely values to the same session's
attribute with the ESQL logicsheet? It sounds odd...
Cyril.
Hi Cyril
Why don't use an action, I think it's better not to have too much Java
code
in your xsp-pages.
In an action you can take your code as it is.
Cheers
Beat
Hi,
I would like to deal with session through xsp, and serve as far as
possible
the same goal as with the following servlet: e.g put all the
parameters
named 'item' in the object of type Vector 'items' bound to the current
session, so that it would be possible to list at any time all of the
items
chosen so far by the client in his session.
public void doGet(HttpServletRequest req, HttpServletResponse res)
throws ServletException, IOException {
res.setContentType(text/html);
PrintWriter out = res.getWriter();
// Get the current session object, create one if necessary.
HttpSession session = req.getSession(true);
// Cart items are maintained in the session object.
Vector items = (Vector)session.getAttribute(cart.items);
if (items == null) { items = new Vector(10,5);}
String item = req.getParameter(item);
items.add(item);
session.setAttribute(cart.items,items);
out.println(HTMLHEADTITLESessionTracker
modifie/TITLE/HEAD);
out.println(BODYH1Session Tracking Demo/H1);
// Print the current cart items.
out.println(You currently have the following items in your
cart:BR);
if (items == null) {
out.println(BNone/B);
}
else {
out.println(UL);
for (int i = 0; i items.size(); i++) {
out.println(LI + items.get(i));
}
out.println(/UL);
}
out.println(/BODY/HTML);
}
}
Below is the xsp i've written for the moment,: this is working fine,
but
does not do what I want: because each time the client chooses an item
and
pass it via the parameter 'item', instead of being added in the object
cart.items, its value overrides this of the preceding parameter.
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
html
xsp-session:set-attribute
name=cart.itemsxsp-request:get-parameter
name=item//xsp-session:set-attribute
bYou currently have the following items in your cart:/b
xsp-session:get-attribute name=cart.items/
br/
bYour session was created:/b xsp-session:get-creation-time
as=string/
/html
/xsp:page
Some of you would know how I can improve my code? Indeed, I would like
cart.items to be like
Re: xsp session logicsheet
On 05.Feb.2003 -- 11:00 AM, Cyril Vidal wrote:
Thanks for you response.
hum, I guess actions are still a little bit too complex for me, regarding my
knowledge of Cocoon...
Isn't it really possible to add merely values to the same session's
attribute with the ESQL logicsheet? It sounds odd...
Er, no. But you probably didn't mean ESQL anyway.
You need to do it as you did it before: retrieve the value, add a new
element to it and then store it again.
// Cart items are maintained in the session object.
Vector items = (Vector)session.getAttribute(cart.items);
if (items == null) { items = new Vector(10,5);}
String item = req.getParameter(item);
items.add(item);
session.setAttribute(cart.items,items);
Would translate to
xsp:logic
Object items = xsp-session:get-attribute name=cart.items/;
if (items == null) items = new Vector(10,5);
((Vector) items).add(xsp-request:get-parameter name=item/);
request.getSession().setAttribute(items);
// logicsheet only supports setting Strings objects :-(
// thus do it manually.
/xsp:logic
Chris.
--
C h r i s t i a n H a u l
[EMAIL PROTECTED]
fingerprint: 99B0 1D9D 7919 644A 4837 7D73 FEF9 6856 335A 9E08
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Re: xsp session logicsheet
Hello Christian, Thanks again for your help and your availibility. Of course, I meant Session logicsheet and not ESQL one...Sorry... I've tried to launch the code you've suggested: ?xml version=1.0? xsp:page xmlns:xsp=http://apache.org/xsp; xmlns:xsp-session=http://apache.org/xsp/session/2.0; xmlns:xsp-request=http://apache.org/xsp/request/2.0; create-session=true xsp:logic Object items = xsp-session:get-attribute name=cart.items/; if (items == null) items = new Vector(10,5); ((Vector) items).add(xsp-request:get-parameter name=item/); request.getSession().setAttribute(items); // logicsheet only supports setting Strings objects :-( // thus do it manually. /xsp:logic /xsp:page But, I receive following error message: type fatal message Language Exception description org.apache.cocoon.ProcessingException: Language Exception: org.apache.cocoon.components.language.LanguageException: Error compiling session3_xsp: Line 78, column 6: illegal start of type Line 79, column 6: illegal start of type Line 88, column 24: expected Line 88, column 14: cannot access class getSession; file request\getSession.class not found Line 73, column 47: variable session not found in class org.apache.cocoon.www.mount.essai.session3_xsp Line 0, column 0: 5 errors sender org.apache.cocoon.servlet.CocoonServlet source Cocoon servlet stack-trace org.apache.cocoon.ProcessingException: Language Exception: org.apache.cocoon.components.language.LanguageException: Error compiling session3_xsp: Line 78, column 6: illegal start of type Line 79, column 6: illegal start of type Line 88, column 24: expected Line 88, column 14: cannot access class getSession; file request\getSession.class not found Line 73, column 47: variable session not found in class org.apache.cocoon.www.mount.essai.session3_xsp Line 0, column 0: 5 errors I've cheked out in the source code of the xsp file generated: 68 /* User Class Declarations */ 70 Object items = 72 ( 73 XSPSessionHelper.getSessionAttribute(session, 74 String.valueOf(cart.items), 75 null) 76) 77 ; 78 if (items == null) items = new Vector(10,5); 79 ((Vector) items).add( 81 ( 82 (XSPRequestHelper.getParameter(objectModel, 83 item, null, 84null, 85null)) 86) 87); I can't figure out why the line 78 throws an illegal start type...Do you see what can be wrong? Regards, Cyril. PS: In the code, you've written: request.getSession().setAttribute(items); shall we not write instead request.getSession().setAttribute(cart-item, items); as in the traditional java servlet? I'm not sure... - Please check that your question has not already been answered in the FAQ before posting. http://xml.apache.org/cocoon/faq/index.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: xsp session logicsheet
On 05.Feb.2003 -- 02:56 PM, Cyril Vidal wrote: Hello Christian, Thanks again for your help and your availibility. Of course, I meant Session logicsheet and not ESQL one...Sorry... I've tried to launch the code you've suggested: ?xml version=1.0? xsp:page xmlns:xsp=http://apache.org/xsp; xmlns:xsp-session=http://apache.org/xsp/session/2.0; xmlns:xsp-request=http://apache.org/xsp/request/2.0; create-session=true The class Vector is unknown here. Add xsp:structure xsp:includejava.util.Vector/xsp:include /xsp:structure in order to create an import statement. Add some markup here, otherwise the following code won't be inside the generate() method but would be expected to be a valid method declaration. content xsp:logic Object items = xsp-session:get-attribute name=cart.items/; if (items == null) items = new Vector(10,5); ((Vector) items).add(xsp-request:get-parameter name=item/); request.getSession().setAttribute(items); // logicsheet only supports setting Strings objects :-( // thus do it manually. /xsp:logic /content /xsp:page Regards, Cyril. PS: In the code, you've written: request.getSession().setAttribute(items); shall we not write instead request.getSession().setAttribute(cart-item, items); as in the traditional java servlet? Absolutely, you are right. And the other poster is also right that there is a variable named session if the session logicsheet is used. Thus it suffices to write session.setAttribute(cart.items, items); Chris. BTW when writing to the list you don't need to CC me -- it will end up in the same mailbox anyway (as duplicates). -- C h r i s t i a n H a u l [EMAIL PROTECTED] fingerprint: 99B0 1D9D 7919 644A 4837 7D73 FEF9 6856 335A 9E08 - Please check that your question has not already been answered in the FAQ before posting. http://xml.apache.org/cocoon/faq/index.html To unsubscribe, e-mail: [EMAIL PROTECTED] For additional commands, e-mail: [EMAIL PROTECTED]
Re: xsp session logicsheet
I think I'm on the point of being successful with my business.
But I still have one question, considering the following short code and
especially the uncommented snippet: (serves to retrieve and display all the
items of the current session)
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
xsp:structure
xsp:includejava.util.Vector/xsp:include
/xsp:structure
content
xsp:logic
Object items = xsp-session:get-attribute name=cart.items/;
if (items == null) items = new Vector(10,5);
((Vector) items).add(xsp-request:get-parameter name=item/);
session.setAttribute(cart.items,items);
/**Error here: method get() and variable i are not known from
Cocoon's servlet
ul
for (int i=0; ilt;items.size(); i++) {
lixsp:expritems.get(i)/xsp:expr/li
}
/ul
**/
/xsp:logic
/content
/xsp:page
Why do I receive the following two errors:
Line 174, column 58: variable i not found in class
org.apache.cocoon.www.mount.essai.session3_xsp
Line 174, column 54: method get() not found in class java.lang.Object
Is the syntax I am using here not the same as the following, which is OK?
elements
xsp:logic
for (int i=1; ilt;11; i++)
{
elementxsp:expri/xsp:expr/element
}
/xsp:logic
/elements
Which is the difference between them?
Regards,
Cyril
- Original Message -
From: Christian Haul [EMAIL PROTECTED]
To: [EMAIL PROTECTED]
Sent: Wednesday, February 05, 2003 3:19 PM
Subject: Re: xsp session logicsheet
On 05.Feb.2003 -- 02:56 PM, Cyril Vidal wrote:
Hello Christian,
Thanks again for your help and your availibility.
Of course, I meant Session logicsheet and not ESQL one...Sorry...
I've tried to launch the code you've suggested:
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
The class Vector is unknown here. Add
xsp:structure
xsp:includejava.util.Vector/xsp:include
/xsp:structure
in order to create an import statement.
Add some markup here, otherwise the following code won't be inside the
generate() method but would be expected to be a valid method
declaration.
content
xsp:logic
Object items = xsp-session:get-attribute name=cart.items/;
if (items == null) items = new Vector(10,5);
((Vector) items).add(xsp-request:get-parameter name=item/);
request.getSession().setAttribute(items);
// logicsheet only supports setting Strings objects :-(
// thus do it manually.
/xsp:logic
/content
/xsp:page
Regards,
Cyril.
PS: In the code, you've written:
request.getSession().setAttribute(items);
shall we not write instead
request.getSession().setAttribute(cart-item, items);
as in the traditional java servlet?
Absolutely, you are right. And the other poster is also right that
there is a variable named session if the session logicsheet is
used. Thus it suffices to write
session.setAttribute(cart.items, items);
Chris.
BTW when writing to the list you don't need to CC me -- it will end up
in the same mailbox anyway (as duplicates).
--
C h r i s t i a n H a u l
[EMAIL PROTECTED]
fingerprint: 99B0 1D9D 7919 644A 4837 7D73 FEF9 6856 335A 9E08
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Re: xsp session logicsheet
On 05.Feb.2003 -- 04:53 PM, Cyril Vidal wrote:
I think I'm on the point of being successful with my business.
But I still have one question, considering the following short code and
especially the uncommented snippet: (serves to retrieve and display all the
items of the current session)
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
xsp:structure
xsp:includejava.util.Vector/xsp:include
/xsp:structure
content
xsp:logic
Object items = xsp-session:get-attribute name=cart.items/;
if (items == null) items = new Vector(10,5);
((Vector) items).add(xsp-request:get-parameter name=item/);
session.setAttribute(cart.items,items);
/**Error here: method get() and variable i are not known from
Cocoon's servlet
ul
for (int i=0; ilt;items.size(); i++) {
Mind you that items is declared of type Object because that cast to
Vector might result in a NPE when applied to null. Thus size() and
get() method are not declared for this object! You need to cast it
first (and probably assign it to a variable of type vector).
lixsp:expritems.get(i)/xsp:expr/li
}
/ul
**/
/xsp:logic
/content
/xsp:page
Chris.
--
C h r i s t i a n H a u l
[EMAIL PROTECTED]
fingerprint: 99B0 1D9D 7919 644A 4837 7D73 FEF9 6856 335A 9E08
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Re: xsp session logicsheet
Hi Roman,
thank you very much for your reponse.
I know that in theory, using actions is better than simply mixing pure Java
code in XSP pages. But it's true that I must go quite quickly, and just to
have an idea of how sessions work in Cocoon, I just would to have a first
try with the second solution. Of course, I have in project to have a deeper
understanding of what goes on under the hood with actions, but a little bit
latter. AFAIK, this concept is not really simple to figure out...
The solution you suggested to me works well, thanks:
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
xsp:structure
xsp:includejava.util.Vector/xsp:include
/xsp:structure
content
xsp:logic
Vector items = (Vector)xsp-session:get-attribute name=cart.items/;
if (items == null) items = new Vector(10,5);
items.add(xsp-request:get-parameter name=item/);
session.setAttribute(cart.items,items);
bThe list of items is:/b xsp-session:get-attribute name=cart.items
default=not set/
/xsp:logic
/content
/xsp:page
But the result is of the following form:
The list of items is: 1336364336433643323643
and I would like better it would be of this form:
The list of items is:
.133636
433
643
3643
323643
So instead of the following code,
bThe list of items is:/b xsp-session:get-attribute name=cart.items
default=not set/
I' ve tried the following one:
bThe list of items is:/b
ul
for (int i = 0; i lt; items.size(); i++) {
lixsp:expritems.get(i)/xsp:expr/li
}
/ul
I have the following error:
Line 226, column 59: variable i not found in class
org.apache.cocoon.www.mount.essai.session3_xsp
Christian Haul has already taken pains (one more time) to explain me what
went wrong, but I'm afraid I've not all understood. I've casted the former
Object items onto Vector one, as suggested,
but it doesn't seem to be sufficient.
Have any idea?
Regards,
Cyril.
Hi Cyril,
you do not have to use actions if you do not want :-)
As I said, when you use session namespace, there is always a variable
session there in the generated java code. You can access this session
either
directly in xsp page from within xsp:logic tags, or you can write your
own
taglib. This taglib can then implicitly use session variable, though it
will
never be declared there. What I propose to you is a kind of dirty
programming style, but as I understood you want a quick solution.
Try something like this, you have to experiment and always look at the
generated code:
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
html
xsp:logic
// beginning of the java code
try {
// Cart items are maintained in the session object.
Vector items = (Vector)session.getAttribute(cart.items);
if (items == null) { items = new Vector(10,5);}
String item = req.getParameter(item);
items.add(item);
session.setAttribute(cart.items,items);
/xsp:logic
bThe list of items is:/b xsp-session:get-attribute name=cart.items
default=not set/
/html
/xsp:page
Roman
-Original Message-
From: Cyril Vidal [mailto:[EMAIL PROTECTED]]
Sent: Wednesday, February 05, 2003 1:53 PM
To: [EMAIL PROTECTED]
Subject: Re: xsp session logicsheet
Hi Roman,
Indeed I've done this:
?xml version=1.0?
xsp:page
xmlns:xsp=http://apache.org/xsp;
xmlns:xsp-session=http://apache.org/xsp/session/2.0;
xmlns:xsp-request=http://apache.org/xsp/request/2.0;
create-session=true
html
xsp-session:set-attribute name=cart.itemsxsp-request:get-parameter
name=item//xsp-session:set-attribute
bThe list of items is:/b xsp-session:get-attribute name=cart.items
default=not set/
br/
bYour session was created:/b xsp-session:get-creation-time
as=string/
/html
/xsp:page
My problem is the following: I would like to add items to the attribute's
session 'cart.items'.
For the moment, the preceding code doesn't do this task.
When I call http://localhost:8080/cocoo/mount/try/session.xsp?item=3
I receive the following html result:
The list of items is: 3
Your session was created: Wed Feb 05 13:41:32 CET 2003
when I then call http://localhost:8080/cocoo/mount/try/session.xsp?item=5
The result is the following:
The list of items is: 5
Your session was created: Wed Feb 05 13:41:32 CET 2003
and of course, I would like
The list of items is: 3, 5
Your session was created: Wed Feb 05 13:41:32 CET 2003
What i would like to know : is it possible to achieve this task by using
Session Logicsheet by itself, does this Logicsheet provides this
functionnality?
If not, the alternative is also to use actions, as suggested in this
thread
before?
Is a built-in action available for this, or do I have to build one
