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Posted to users@tomcat.apache.org by Mohammed Zabin <jo...@gmail.com> on 2007/07/23 11:18:43 UTC
Bean and Servlet
Hi All
What is the best way to pass a list collection from a Bean to a Servlet?
Thank you
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
I have changed like this:
pageContext.getRequest().setAttribute("InQry", qry);
and retrieve it in the servlet like this:
inQry = (String)request.getAttribute("InQry");
But when using request attributes, inQry will be null when retrieved?????
On 7/26/07, Mohammed Zabin <jo...@gmail.com> wrote:
>
> What do you suggest to overcome this problem?
>
> On 7/25/07, Caldarale, Charles R <Ch...@unisys.com> wrote:
> >
> > > From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> > > Subject: Re: Bean and Servlet
> > >
> > > I will tell you the procedure; At each time the user clickes
> > > the first page in the site, a random numbers will be generated
> > > and stored in the session.
> >
> > You're missing the point. The user may click multiple times before the
> > first request is even received by the webapp, or the browser may simply
> > fire off multiple parallel requests, or the user may open multiple tabs
> > for the same web site. All of the above will result in multiple
> > concurrent requests occurring for the same session. Does your logic
> > handle that properly? The code snippet you posted does not.
> >
> > - Chuck
> >
> >
> > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> >
> > MATERIAL and is thus for use only by the intended recipient. If you
> > received this in error, please contact the sender and delete the e-mail
> > and its attachments from all computers.
> >
> > ---------------------------------------------------------------------
> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
> >
>
Re: Bean and Servlet
Posted by David Smith <dn...@cornell.edu>.
That clarifies a lot :-) ! You are indeed dealing with two separate
requests from client to server. As such the Request object won't be the
same between the jsp and the servlet and is the reason your storage of
an attribute in the request didn't work. Sessions are buit for just
this reason.
There may be a problem with concurrent access to the session if the user
get's click happy or has multiple browser windows open on the same
session and you'll have to be able to handle that. In general I would
avoid attributes in the session that might cause conflicts depending on
where each browser is in the app. In your case two windows could be
prompted for a different random question/answer on the same session.
Such a issue might be mitigated with a one time random token stored both
as a hidden form field and a session attribute. As each request comes
in, compare the tokens and handle appropriately.
Additionally I believe there was a bugzilla issue describing a version
(or versions) of tomcat that didn't use a thread-safe method of storing
session attributes, so you might have to introduce synchronize blocks in
your code to deal with that. You'll have to look at the bugzilla
database for the issue, tomcat version(s) and it's resolution. I don't
have that info off hand.
--David
Mohammed Zabin wrote:
>Well, I will descript the problem exactly. the first page use a tag class to
>render a random question from database, and their possible answers, the user
>must choose the right answer and submit the form for processing.
>
> I need the random question numbers, which are question ids to
>*Results*servlet.
>*Results* servlet is a servlet that must display the same questions that was
>displayed in the Questions page to run a query against the database to
>display the questions and the correct and wrong answers.
>
>My Problem is that, I want to pass these numbers, Questions IDs, from the
>first page, which i have made it as a tag class, to Results page, which was
>made as servlet. I tried to use request.setAttribute("Ids", ids); but when
>retrieve it in Results servlet, I got *null. *
>
> That was my problem my buddy, by the way, when i used session, it worked
>fine. and you stated that this will not work, but i think that storing these
>ids in a session is a good choice, isn't it?
>
>If you have any comments please post it.
>
>
>On 7/26/07, Caldarale, Charles R <Ch...@unisys.com> wrote:
>
>
>>>From: Mohammed Zabin [mailto:jotnarta@gmail.com]
>>>Subject: Re: Bean and Servlet
>>>
>>>What do you suggest to overcome this problem?
>>>
>>>
>>In the seven messages you've posted in this thread, you've never really
>>explained what this attribute is being used for; nor have you answered
>>the question of whether or not it's used only for the duration of a
>>single request or is applicable to everything a given user does with
>>this particular webapp.
>>
>>Until you give us some idea of what your intent is (as opposed to code
>>snippets), I don't think anyone can really answer your questions.
>>
>>If you do need to store attributes in a session, you will need at least
>>some synchronization logic to see if the attribute is already present,
>>since multiple requests can easily be using the Session object
>>concurrently.
>>
>>- Chuck
>>
>>
>>THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
>>MATERIAL and is thus for use only by the intended recipient. If you
>>received this in error, please contact the sender and delete the e-mail
>>and its attachments from all computers.
>>
>>---------------------------------------------------------------------
>>To start a new topic, e-mail: users@tomcat.apache.org
>>To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>>
>>
>
>
>
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Re: Bean and Servlet
Posted by Pid <p...@pidster.com>.
Mohammed Zabin wrote:
> On 7/27/07, Mohammed Zabin <jo...@gmail.com> wrote:
>> Ok, in the first page, which use a tag, I generate 10 random numbers. and
>> generate a SQL statement containing this numbers like the following:
>> SELECT * FROM table WHERE id in ( 2, 3, 5, 10, .... etc). I use a string
>> to hold the " in " statement and bound it to the whole query string.
>>
>> After submitting the page, I need to check the validety of the answers,
>> for the same questions. So, I store the inStr in a session and read it in
>> the second page.
why not just include the question id in the fieldname and submit with
the answer?
<textarea name="question_3">an answer</textarea>
<textarea name="question_5">another answer</textarea>
Enumeration paramNames = request.getParameterNames();
while (paramNames.hasMoreElements()) {
String name = (String) paramNames.nextElement();
if (name.startsWith("question_")) {
String id = name.replaceFirst("question_", "");
// or remove 'all not digits'
// String numeric_id = name.replaceAll("\\D", "");
String value = request.getParameter(name);
// id=3, value=an answer
// id=5, value=another answer
}
}
>> Regarding concurrency issue, I think that I don't need to synchronize
>> random number generation. Because I don't have a problem for multiple
>> requests to have the same set of questions. The most important issue is that
>> for a given request, I need to submit the same collection of questions
>> to Results page. And so, i used session to store the questions ids'.
>>
>>
>> On 7/27/07, Pid <p...@pidster.com> wrote:
>>> Caldarale, Charles R wrote:
>>>>> From: Mohammed Zabin [mailto:jotnarta@gmail.com ]
>>>>> Subject: Re: Bean and Servlet
>>>>>
>>>>> My Problem is that, I want to pass these numbers, Questions
>>>>> IDs, from the first page, which i have made it as a tag class,
>>>>> to Results page, which was made as servlet.
>>>> Rather than hanging onto the ID within Tomcat, why not store it on the
>>>> generated web page (as a hidden field) and have some script on that
>>> page
>>>> include it with the next request from the client? That way you avoid
>>>> all synchronization issues that can occur with simultaneous requests.
>>> It sounds like a simple form submit with (a) hidden field(s).
>>>
>>> Why do all of the rest of the ids need to be submitted as well, if
>>> you're only checking for the single correct answer?
>>>
>>> p
>>>
>>>
>>>>> That was my problem my buddy, by the way, when i used
>>>>> session, it worked fine. and you stated that this will
>>>>> not work
>>>> I didn't say it wouldn't work, I said you had to be careful and take
>>>> concurrency into account, which your code snippets did not.
>>>>
>>>> - Chuck
>>>>
>>>>
>>>> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE
>>> PROPRIETARY
>>>> MATERIAL and is thus for use only by the intended recipient. If you
>>>> received this in error, please contact the sender and delete the
>>> e-mail
>>>> and its attachments from all computers.
>>>>
>>>> ---------------------------------------------------------------------
>>>> To start a new topic, e-mail: users@tomcat.apache.org
>>>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>>>> For additional commands, e-mail: users-help@tomcat.apache.org
>>>>
>>>>
>>>
>>>
>
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
On 7/27/07, Mohammed Zabin <jo...@gmail.com> wrote:
>
> Ok, in the first page, which use a tag, I generate 10 random numbers. and
> generate a SQL statement containing this numbers like the following:
> SELECT * FROM table WHERE id in ( 2, 3, 5, 10, .... etc). I use a string
> to hold the " in " statement and bound it to the whole query string.
>
> After submitting the page, I need to check the validety of the answers,
> for the same questions. So, I store the inStr in a session and read it in
> the second page.
>
> Regarding concurrency issue, I think that I don't need to synchronize
> random number generation. Because I don't have a problem for multiple
> requests to have the same set of questions. The most important issue is that
> for a given request, I need to submit the same collection of questions
> to Results page. And so, i used session to store the questions ids'.
>
>
> On 7/27/07, Pid <p...@pidster.com> wrote:
> >
> > Caldarale, Charles R wrote:
> > >> From: Mohammed Zabin [mailto:jotnarta@gmail.com ]
> > >> Subject: Re: Bean and Servlet
> > >>
> > >> My Problem is that, I want to pass these numbers, Questions
> > >> IDs, from the first page, which i have made it as a tag class,
> > >> to Results page, which was made as servlet.
> > >
> > > Rather than hanging onto the ID within Tomcat, why not store it on the
> > > generated web page (as a hidden field) and have some script on that
> > page
> > > include it with the next request from the client? That way you avoid
> > > all synchronization issues that can occur with simultaneous requests.
> >
> > It sounds like a simple form submit with (a) hidden field(s).
> >
> > Why do all of the rest of the ids need to be submitted as well, if
> > you're only checking for the single correct answer?
> >
> > p
> >
> >
> > >> That was my problem my buddy, by the way, when i used
> > >> session, it worked fine. and you stated that this will
> > >> not work
> > >
> > > I didn't say it wouldn't work, I said you had to be careful and take
> > > concurrency into account, which your code snippets did not.
> > >
> > > - Chuck
> > >
> > >
> > > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE
> > PROPRIETARY
> > > MATERIAL and is thus for use only by the intended recipient. If you
> > > received this in error, please contact the sender and delete the
> > e-mail
> > > and its attachments from all computers.
> > >
> > > ---------------------------------------------------------------------
> > > To start a new topic, e-mail: users@tomcat.apache.org
> > > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > > For additional commands, e-mail: users-help@tomcat.apache.org
> > >
> > >
> >
> >
> >
>
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
Ok, in the first page, which use a tag, I generate 10 random numbers. and
generate a SQL statement containing this numbers like the following:
SELECT * FROM table WHERE id in ( 2, 3, 5, 10, .... etc). I use a string to
hold the " in " statement and bound it to the whole query string.
After submitting the page, I need to check the validety of the answers, for
the same questions. So, I store the inStr in a session and read it in the
second page.
Regarding concurrency issue, I think that I don't need to synchronize random
number generation. Because I don't have a problem for multiple requests to
have the same set of questions.
On 7/27/07, Pid <p...@pidster.com> wrote:
>
> Caldarale, Charles R wrote:
> >> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> >> Subject: Re: Bean and Servlet
> >>
> >> My Problem is that, I want to pass these numbers, Questions
> >> IDs, from the first page, which i have made it as a tag class,
> >> to Results page, which was made as servlet.
> >
> > Rather than hanging onto the ID within Tomcat, why not store it on the
> > generated web page (as a hidden field) and have some script on that page
> > include it with the next request from the client? That way you avoid
> > all synchronization issues that can occur with simultaneous requests.
>
> It sounds like a simple form submit with (a) hidden field(s).
>
> Why do all of the rest of the ids need to be submitted as well, if
> you're only checking for the single correct answer?
>
> p
>
>
> >> That was my problem my buddy, by the way, when i used
> >> session, it worked fine. and you stated that this will
> >> not work
> >
> > I didn't say it wouldn't work, I said you had to be careful and take
> > concurrency into account, which your code snippets did not.
> >
> > - Chuck
> >
> >
> > THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> > MATERIAL and is thus for use only by the intended recipient. If you
> > received this in error, please contact the sender and delete the e-mail
> > and its attachments from all computers.
> >
> > ---------------------------------------------------------------------
> > To start a new topic, e-mail: users@tomcat.apache.org
> > To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> > For additional commands, e-mail: users-help@tomcat.apache.org
> >
> >
>
>
>
Re: Bean and Servlet
Posted by Pid <p...@pidster.com>.
Caldarale, Charles R wrote:
>> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
>> Subject: Re: Bean and Servlet
>>
>> My Problem is that, I want to pass these numbers, Questions
>> IDs, from the first page, which i have made it as a tag class,
>> to Results page, which was made as servlet.
>
> Rather than hanging onto the ID within Tomcat, why not store it on the
> generated web page (as a hidden field) and have some script on that page
> include it with the next request from the client? That way you avoid
> all synchronization issues that can occur with simultaneous requests.
It sounds like a simple form submit with (a) hidden field(s).
Why do all of the rest of the ids need to be submitted as well, if
you're only checking for the single correct answer?
p
>> That was my problem my buddy, by the way, when i used
>> session, it worked fine. and you stated that this will
>> not work
>
> I didn't say it wouldn't work, I said you had to be careful and take
> concurrency into account, which your code snippets did not.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> MATERIAL and is thus for use only by the intended recipient. If you
> received this in error, please contact the sender and delete the e-mail
> and its attachments from all computers.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
RE: Bean and Servlet
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> Subject: Re: Bean and Servlet
>
> My Problem is that, I want to pass these numbers, Questions
> IDs, from the first page, which i have made it as a tag class,
> to Results page, which was made as servlet.
Rather than hanging onto the ID within Tomcat, why not store it on the
generated web page (as a hidden field) and have some script on that page
include it with the next request from the client? That way you avoid
all synchronization issues that can occur with simultaneous requests.
> That was my problem my buddy, by the way, when i used
> session, it worked fine. and you stated that this will
> not work
I didn't say it wouldn't work, I said you had to be careful and take
concurrency into account, which your code snippets did not.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
Well, I will descript the problem exactly. the first page use a tag class to
render a random question from database, and their possible answers, the user
must choose the right answer and submit the form for processing.
I need the random question numbers, which are question ids to
*Results*servlet.
*Results* servlet is a servlet that must display the same questions that was
displayed in the Questions page to run a query against the database to
display the questions and the correct and wrong answers.
My Problem is that, I want to pass these numbers, Questions IDs, from the
first page, which i have made it as a tag class, to Results page, which was
made as servlet. I tried to use request.setAttribute("Ids", ids); but when
retrieve it in Results servlet, I got *null. *
That was my problem my buddy, by the way, when i used session, it worked
fine. and you stated that this will not work, but i think that storing these
ids in a session is a good choice, isn't it?
If you have any comments please post it.
On 7/26/07, Caldarale, Charles R <Ch...@unisys.com> wrote:
>
> > From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> > Subject: Re: Bean and Servlet
> >
> > What do you suggest to overcome this problem?
>
> In the seven messages you've posted in this thread, you've never really
> explained what this attribute is being used for; nor have you answered
> the question of whether or not it's used only for the duration of a
> single request or is applicable to everything a given user does with
> this particular webapp.
>
> Until you give us some idea of what your intent is (as opposed to code
> snippets), I don't think anyone can really answer your questions.
>
> If you do need to store attributes in a session, you will need at least
> some synchronization logic to see if the attribute is already present,
> since multiple requests can easily be using the Session object
> concurrently.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> MATERIAL and is thus for use only by the intended recipient. If you
> received this in error, please contact the sender and delete the e-mail
> and its attachments from all computers.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
RE: Bean and Servlet
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> Subject: Re: Bean and Servlet
>
> What do you suggest to overcome this problem?
In the seven messages you've posted in this thread, you've never really
explained what this attribute is being used for; nor have you answered
the question of whether or not it's used only for the duration of a
single request or is applicable to everything a given user does with
this particular webapp.
Until you give us some idea of what your intent is (as opposed to code
snippets), I don't think anyone can really answer your questions.
If you do need to store attributes in a session, you will need at least
some synchronization logic to see if the attribute is already present,
since multiple requests can easily be using the Session object
concurrently.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
What do you suggest to overcome this problem?
On 7/25/07, Caldarale, Charles R <Ch...@unisys.com> wrote:
>
> > From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> > Subject: Re: Bean and Servlet
> >
> > I will tell you the procedure; At each time the user clickes
> > the first page in the site, a random numbers will be generated
> > and stored in the session.
>
> You're missing the point. The user may click multiple times before the
> first request is even received by the webapp, or the browser may simply
> fire off multiple parallel requests, or the user may open multiple tabs
> for the same web site. All of the above will result in multiple
> concurrent requests occurring for the same session. Does your logic
> handle that properly? The code snippet you posted does not.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> MATERIAL and is thus for use only by the intended recipient. If you
> received this in error, please contact the sender and delete the e-mail
> and its attachments from all computers.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
RE: Bean and Servlet
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> Subject: Re: Bean and Servlet
>
> I will tell you the procedure; At each time the user clickes
> the first page in the site, a random numbers will be generated
> and stored in the session.
You're missing the point. The user may click multiple times before the
first request is even received by the webapp, or the browser may simply
fire off multiple parallel requests, or the user may open multiple tabs
for the same web site. All of the above will result in multiple
concurrent requests occurring for the same session. Does your logic
handle that properly? The code snippet you posted does not.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
To start a new topic, e-mail: users@tomcat.apache.org
To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
For additional commands, e-mail: users-help@tomcat.apache.org
Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
I will tell you the procedure; At each time the user clickes the first page
in the site, a random numbers will be generated and stored in the session.
So, i think that each user has its own numbers, right?
On 7/24/07, Caldarale, Charles R <Ch...@unisys.com> wrote:
>
> > From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> > Subject: Re: Bean and Servlet
> >
> > Thank you I solve it using session, particularly:
> > pageContext.getSession().setAttribute("InQry", qry);
>
> Are you sure you want to do that? If multiple requests from the browser
> are being processed concurrently, any data at session scope will be
> shared amongst them.
>
> - Chuck
>
>
> THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
> MATERIAL and is thus for use only by the intended recipient. If you
> received this in error, please contact the sender and delete the e-mail
> and its attachments from all computers.
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
RE: Bean and Servlet
Posted by "Caldarale, Charles R" <Ch...@unisys.com>.
> From: Mohammed Zabin [mailto:jotnarta@gmail.com]
> Subject: Re: Bean and Servlet
>
> Thank you I solve it using session, particularly:
> pageContext.getSession().setAttribute("InQry", qry);
Are you sure you want to do that? If multiple requests from the browser
are being processed concurrently, any data at session scope will be
shared amongst them.
- Chuck
THIS COMMUNICATION MAY CONTAIN CONFIDENTIAL AND/OR OTHERWISE PROPRIETARY
MATERIAL and is thus for use only by the intended recipient. If you
received this in error, please contact the sender and delete the e-mail
and its attachments from all computers.
---------------------------------------------------------------------
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Re: Bean and Servlet
Posted by David Smith <dn...@cornell.edu>.
This should really be in a separate thread, but I don't see any reason
multiple resources for a single webapp shouldn't work.
BTW, your solution implies the manner you were calling the servlet was
in a separate request. If the servlet is called in a separate request,
it won't share any of the same request attributes as it's caller.
--David
Mohammed Zabin wrote:
> Thank you I solve it using session, particularly:
> pageContext.getSession().setAttribute("InQry", qry);
>
> and retreive it in the servlet like this:
> String inQry = (String)request.getSession().getAttribute("InQry");
>
> But, I have a question regarding DBCP, it is not wrong to have more
> than one
> CP, isn't it? I mean is it allowed to have a Resource for Oracle and
> another
> for MySql?
>
>
> On 7/24/07, David Smith <dn...@cornell.edu> wrote:
>
>>
>> Can you post the relevant parts of how/where you call this servlet?
>> I've never had a problem retrieving a request attribute after it was
>> added and before the end of the request.
>>
>> --David
>>
>> Mohammed Zabin wrote:
>> > Actually, I wanted to pass this list from within a Tag to be used
>> inside
>> > another Servlet class, (i.e. the tag class after finishing
>> rendering its
>> > elements, goes to a servlet, so, i need to pass this list to that
>> > servlet.
>> > As i have stated above, i used the following to store the list in the
>> > request object:
>> >
>> > [code]pageContext.getRequest().setAttribute("QList", list);[/code]
>> >
>> > In the servlet, i used the following to retrive the list:
>> >
>> > List<Integer> list = (List<Integer>)request.getAttribute(
>> > "QList");
>> >
>> > I tried to access the above list by a small code snippet that
>> prints its
>> > size:
>> > [code]out.println( list.size() );[/code]
>> > But i got an exception stating that a NullPointerException has occured
>> at
>> > the size printing statement. That's mean, i think, the list didn't
>> stored
>> > correctly in the request object, am I true?
>> >
>> >
>> > On 7/23/07, David Smith <dn...@cornell.edu> wrote:
>> >>
>> >> Typical design is servlet forwarding to jsp for view. Tags being jsp
>> >> elements occur after servlets have executed. So you can see how your
>> >> problem is a little curious in that jsps don't typically forward to
>> >> servlets. If you are forwarding a request from jsp to servlet,
>> let us
>> >> know.
>> >>
>> >> However if you are storing a object in a request during jsp execution
>> >> intending it to be available to the servlet on the next request, that
>> >> doesn't work. The request is cleared and recycled when jsps finish
>> >> writing to the client. When a new request comes in, the request
>> >> attribute list is empty. If you need this list to live between
>> >> requests, you need to place it in the session.
>> >>
>> >> --David
>> >>
>> >> Mohammed Zabin wrote:
>> >>
>> >> > Thank you Johnny,
>> >> > To be specific this is my question
>> >> > Hi all
>> >> >
>> >> > I am trying to pass an object from a tag to a servlet. i did the
>> >> > following,
>> >> >
>> >> > 1. In the tag class, i put:
>> >> >
>> >> > pageContext.getRequest().setAttribute("QList", list);
>> >> >
>> >> >
>> >> >
>> >> > The above Tag will go to a servlet, i need to read the above
>> request
>> >> > attribute in the servlet, how can i do this?, i tried
>> >> >
>> >> > List<Integer> list = (List<Integer>)request.getAttribute("QList");
>> >> >
>> >> > , but when i tried to access the read list, it gave me
>> >> > NullPointerException...What do u think?
>> >> >
>> >> >
>> >> > On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
>> >> >
>> >> >>
>> >> >> Hi Mohammed,
>> >> >> Cant say I really understand the question....
>> >> >>
>> >> >> In general this is what the Session Objects are for....
>> >> >> So say you have a servlet and a JSP page.... and say the servlet
>> >> >> makes the
>> >> >> bean with the Array List in it.... then if you
>> >> >>
>> >> >> session.setAttribute("MyBean", MyBean);
>> >> >>
>> >> >> you can get it (MyBean) back when the next call comes into say the
>> >> JSP
>> >> >> page....
>> >> >>
>> >> >> Now if you read up on this you will see you can also set 'request'
>> >> >> objects.... and these are good for when you say dispatch a request
>> >> to a
>> >> >> JSP
>> >> >> page from the servlet and want to pass a bean across.
>> >> >>
>> >> >> Anyway... if you just google for "servlet session and
>> >> setAttribute"....
>> >> >> you
>> >> >> will be on your way... I think ;)
>> >> >> This area of servlet programming is one of the things that make it
>> >> >> such a
>> >> >> powerful technology.
>> >> >> Have fun...
>> >> >>
>> >> >> ----- Original Message -----
>> >> >> From: "Mohammed Zabin" <jo...@gmail.com>
>> >> >> To: "Tomcat Users List" <us...@tomcat.apache.org>
>> >> >> Sent: Monday, July 23, 2007 11:18 AM
>> >> >> Subject: Bean and Servlet
>> >> >>
>> >> >>
>> >> >> > Hi All
>> >> >> > What is the best way to pass a list collection from a Bean to a
>> >> >> Servlet?
>> >> >> > Thank you
>> >> >> >
>> >> >>
>> >> >>
>> >> >>
>> ---------------------------------------------------------------------
>> >> >> To start a new topic, e-mail: users@tomcat.apache.org
>> >> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> >> >> For additional commands, e-mail: users-help@tomcat.apache.org
>> >> >>
>> >> >>
>> >> >
>> >>
>> >>
>> >> ---------------------------------------------------------------------
>> >> To start a new topic, e-mail: users@tomcat.apache.org
>> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> >> For additional commands, e-mail: users-help@tomcat.apache.org
>> >>
>> >>
>> >
>>
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
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Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
Thank you I solve it using session, particularly:
pageContext.getSession().setAttribute("InQry", qry);
and retreive it in the servlet like this:
String inQry = (String)request.getSession().getAttribute("InQry");
But, I have a question regarding DBCP, it is not wrong to have more than one
CP, isn't it? I mean is it allowed to have a Resource for Oracle and another
for MySql?
On 7/24/07, David Smith <dn...@cornell.edu> wrote:
>
> Can you post the relevant parts of how/where you call this servlet?
> I've never had a problem retrieving a request attribute after it was
> added and before the end of the request.
>
> --David
>
> Mohammed Zabin wrote:
> > Actually, I wanted to pass this list from within a Tag to be used inside
> > another Servlet class, (i.e. the tag class after finishing rendering its
> > elements, goes to a servlet, so, i need to pass this list to that
> > servlet.
> > As i have stated above, i used the following to store the list in the
> > request object:
> >
> > [code]pageContext.getRequest().setAttribute("QList", list);[/code]
> >
> > In the servlet, i used the following to retrive the list:
> >
> > List<Integer> list = (List<Integer>)request.getAttribute(
> > "QList");
> >
> > I tried to access the above list by a small code snippet that prints its
> > size:
> > [code]out.println( list.size() );[/code]
> > But i got an exception stating that a NullPointerException has occured
> at
> > the size printing statement. That's mean, i think, the list didn't
> stored
> > correctly in the request object, am I true?
> >
> >
> > On 7/23/07, David Smith <dn...@cornell.edu> wrote:
> >>
> >> Typical design is servlet forwarding to jsp for view. Tags being jsp
> >> elements occur after servlets have executed. So you can see how your
> >> problem is a little curious in that jsps don't typically forward to
> >> servlets. If you are forwarding a request from jsp to servlet, let us
> >> know.
> >>
> >> However if you are storing a object in a request during jsp execution
> >> intending it to be available to the servlet on the next request, that
> >> doesn't work. The request is cleared and recycled when jsps finish
> >> writing to the client. When a new request comes in, the request
> >> attribute list is empty. If you need this list to live between
> >> requests, you need to place it in the session.
> >>
> >> --David
> >>
> >> Mohammed Zabin wrote:
> >>
> >> > Thank you Johnny,
> >> > To be specific this is my question
> >> > Hi all
> >> >
> >> > I am trying to pass an object from a tag to a servlet. i did the
> >> > following,
> >> >
> >> > 1. In the tag class, i put:
> >> >
> >> > pageContext.getRequest().setAttribute("QList", list);
> >> >
> >> >
> >> >
> >> > The above Tag will go to a servlet, i need to read the above request
> >> > attribute in the servlet, how can i do this?, i tried
> >> >
> >> > List<Integer> list = (List<Integer>)request.getAttribute("QList");
> >> >
> >> > , but when i tried to access the read list, it gave me
> >> > NullPointerException...What do u think?
> >> >
> >> >
> >> > On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
> >> >
> >> >>
> >> >> Hi Mohammed,
> >> >> Cant say I really understand the question....
> >> >>
> >> >> In general this is what the Session Objects are for....
> >> >> So say you have a servlet and a JSP page.... and say the servlet
> >> >> makes the
> >> >> bean with the Array List in it.... then if you
> >> >>
> >> >> session.setAttribute("MyBean", MyBean);
> >> >>
> >> >> you can get it (MyBean) back when the next call comes into say the
> >> JSP
> >> >> page....
> >> >>
> >> >> Now if you read up on this you will see you can also set 'request'
> >> >> objects.... and these are good for when you say dispatch a request
> >> to a
> >> >> JSP
> >> >> page from the servlet and want to pass a bean across.
> >> >>
> >> >> Anyway... if you just google for "servlet session and
> >> setAttribute"....
> >> >> you
> >> >> will be on your way... I think ;)
> >> >> This area of servlet programming is one of the things that make it
> >> >> such a
> >> >> powerful technology.
> >> >> Have fun...
> >> >>
> >> >> ----- Original Message -----
> >> >> From: "Mohammed Zabin" <jo...@gmail.com>
> >> >> To: "Tomcat Users List" <us...@tomcat.apache.org>
> >> >> Sent: Monday, July 23, 2007 11:18 AM
> >> >> Subject: Bean and Servlet
> >> >>
> >> >>
> >> >> > Hi All
> >> >> > What is the best way to pass a list collection from a Bean to a
> >> >> Servlet?
> >> >> > Thank you
> >> >> >
> >> >>
> >> >>
> >> >>
> ---------------------------------------------------------------------
> >> >> To start a new topic, e-mail: users@tomcat.apache.org
> >> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> >> >> For additional commands, e-mail: users-help@tomcat.apache.org
> >> >>
> >> >>
> >> >
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To start a new topic, e-mail: users@tomcat.apache.org
> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> >> For additional commands, e-mail: users-help@tomcat.apache.org
> >>
> >>
> >
>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: Bean and Servlet
Posted by David Smith <dn...@cornell.edu>.
Can you post the relevant parts of how/where you call this servlet?
I've never had a problem retrieving a request attribute after it was
added and before the end of the request.
--David
Mohammed Zabin wrote:
> Actually, I wanted to pass this list from within a Tag to be used inside
> another Servlet class, (i.e. the tag class after finishing rendering its
> elements, goes to a servlet, so, i need to pass this list to that
> servlet.
> As i have stated above, i used the following to store the list in the
> request object:
>
> [code]pageContext.getRequest().setAttribute("QList", list);[/code]
>
> In the servlet, i used the following to retrive the list:
>
> List<Integer> list = (List<Integer>)request.getAttribute(
> "QList");
>
> I tried to access the above list by a small code snippet that prints its
> size:
> [code]out.println( list.size() );[/code]
> But i got an exception stating that a NullPointerException has occured at
> the size printing statement. That's mean, i think, the list didn't stored
> correctly in the request object, am I true?
>
>
> On 7/23/07, David Smith <dn...@cornell.edu> wrote:
>>
>> Typical design is servlet forwarding to jsp for view. Tags being jsp
>> elements occur after servlets have executed. So you can see how your
>> problem is a little curious in that jsps don't typically forward to
>> servlets. If you are forwarding a request from jsp to servlet, let us
>> know.
>>
>> However if you are storing a object in a request during jsp execution
>> intending it to be available to the servlet on the next request, that
>> doesn't work. The request is cleared and recycled when jsps finish
>> writing to the client. When a new request comes in, the request
>> attribute list is empty. If you need this list to live between
>> requests, you need to place it in the session.
>>
>> --David
>>
>> Mohammed Zabin wrote:
>>
>> > Thank you Johnny,
>> > To be specific this is my question
>> > Hi all
>> >
>> > I am trying to pass an object from a tag to a servlet. i did the
>> > following,
>> >
>> > 1. In the tag class, i put:
>> >
>> > pageContext.getRequest().setAttribute("QList", list);
>> >
>> >
>> >
>> > The above Tag will go to a servlet, i need to read the above request
>> > attribute in the servlet, how can i do this?, i tried
>> >
>> > List<Integer> list = (List<Integer>)request.getAttribute("QList");
>> >
>> > , but when i tried to access the read list, it gave me
>> > NullPointerException...What do u think?
>> >
>> >
>> > On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
>> >
>> >>
>> >> Hi Mohammed,
>> >> Cant say I really understand the question....
>> >>
>> >> In general this is what the Session Objects are for....
>> >> So say you have a servlet and a JSP page.... and say the servlet
>> >> makes the
>> >> bean with the Array List in it.... then if you
>> >>
>> >> session.setAttribute("MyBean", MyBean);
>> >>
>> >> you can get it (MyBean) back when the next call comes into say the
>> JSP
>> >> page....
>> >>
>> >> Now if you read up on this you will see you can also set 'request'
>> >> objects.... and these are good for when you say dispatch a request
>> to a
>> >> JSP
>> >> page from the servlet and want to pass a bean across.
>> >>
>> >> Anyway... if you just google for "servlet session and
>> setAttribute"....
>> >> you
>> >> will be on your way... I think ;)
>> >> This area of servlet programming is one of the things that make it
>> >> such a
>> >> powerful technology.
>> >> Have fun...
>> >>
>> >> ----- Original Message -----
>> >> From: "Mohammed Zabin" <jo...@gmail.com>
>> >> To: "Tomcat Users List" <us...@tomcat.apache.org>
>> >> Sent: Monday, July 23, 2007 11:18 AM
>> >> Subject: Bean and Servlet
>> >>
>> >>
>> >> > Hi All
>> >> > What is the best way to pass a list collection from a Bean to a
>> >> Servlet?
>> >> > Thank you
>> >> >
>> >>
>> >>
>> >> ---------------------------------------------------------------------
>> >> To start a new topic, e-mail: users@tomcat.apache.org
>> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> >> For additional commands, e-mail: users-help@tomcat.apache.org
>> >>
>> >>
>> >
>>
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
---------------------------------------------------------------------
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Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
Actually, I wanted to pass this list from within a Tag to be used inside
another Servlet class, (i.e. the tag class after finishing rendering its
elements, goes to a servlet, so, i need to pass this list to that servlet.
As i have stated above, i used the following to store the list in the
request object:
[code]pageContext.getRequest().setAttribute("QList", list);[/code]
In the servlet, i used the following to retrive the list:
List<Integer> list = (List<Integer>)request.getAttribute(
"QList");
I tried to access the above list by a small code snippet that prints its
size:
[code]out.println( list.size() );[/code]
But i got an exception stating that a NullPointerException has occured at
the size printing statement. That's mean, i think, the list didn't stored
correctly in the request object, am I true?
On 7/23/07, David Smith <dn...@cornell.edu> wrote:
>
> Typical design is servlet forwarding to jsp for view. Tags being jsp
> elements occur after servlets have executed. So you can see how your
> problem is a little curious in that jsps don't typically forward to
> servlets. If you are forwarding a request from jsp to servlet, let us
> know.
>
> However if you are storing a object in a request during jsp execution
> intending it to be available to the servlet on the next request, that
> doesn't work. The request is cleared and recycled when jsps finish
> writing to the client. When a new request comes in, the request
> attribute list is empty. If you need this list to live between
> requests, you need to place it in the session.
>
> --David
>
> Mohammed Zabin wrote:
>
> > Thank you Johnny,
> > To be specific this is my question
> > Hi all
> >
> > I am trying to pass an object from a tag to a servlet. i did the
> > following,
> >
> > 1. In the tag class, i put:
> >
> > pageContext.getRequest().setAttribute("QList", list);
> >
> >
> >
> > The above Tag will go to a servlet, i need to read the above request
> > attribute in the servlet, how can i do this?, i tried
> >
> > List<Integer> list = (List<Integer>)request.getAttribute("QList");
> >
> > , but when i tried to access the read list, it gave me
> > NullPointerException...What do u think?
> >
> >
> > On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
> >
> >>
> >> Hi Mohammed,
> >> Cant say I really understand the question....
> >>
> >> In general this is what the Session Objects are for....
> >> So say you have a servlet and a JSP page.... and say the servlet
> >> makes the
> >> bean with the Array List in it.... then if you
> >>
> >> session.setAttribute("MyBean", MyBean);
> >>
> >> you can get it (MyBean) back when the next call comes into say the JSP
> >> page....
> >>
> >> Now if you read up on this you will see you can also set 'request'
> >> objects.... and these are good for when you say dispatch a request to a
> >> JSP
> >> page from the servlet and want to pass a bean across.
> >>
> >> Anyway... if you just google for "servlet session and
> setAttribute"....
> >> you
> >> will be on your way... I think ;)
> >> This area of servlet programming is one of the things that make it
> >> such a
> >> powerful technology.
> >> Have fun...
> >>
> >> ----- Original Message -----
> >> From: "Mohammed Zabin" <jo...@gmail.com>
> >> To: "Tomcat Users List" <us...@tomcat.apache.org>
> >> Sent: Monday, July 23, 2007 11:18 AM
> >> Subject: Bean and Servlet
> >>
> >>
> >> > Hi All
> >> > What is the best way to pass a list collection from a Bean to a
> >> Servlet?
> >> > Thank you
> >> >
> >>
> >>
> >> ---------------------------------------------------------------------
> >> To start a new topic, e-mail: users@tomcat.apache.org
> >> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> >> For additional commands, e-mail: users-help@tomcat.apache.org
> >>
> >>
> >
>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: Bean and Servlet
Posted by David Smith <dn...@cornell.edu>.
Typical design is servlet forwarding to jsp for view. Tags being jsp
elements occur after servlets have executed. So you can see how your
problem is a little curious in that jsps don't typically forward to
servlets. If you are forwarding a request from jsp to servlet, let us know.
However if you are storing a object in a request during jsp execution
intending it to be available to the servlet on the next request, that
doesn't work. The request is cleared and recycled when jsps finish
writing to the client. When a new request comes in, the request
attribute list is empty. If you need this list to live between
requests, you need to place it in the session.
--David
Mohammed Zabin wrote:
> Thank you Johnny,
> To be specific this is my question
> Hi all
>
> I am trying to pass an object from a tag to a servlet. i did the
> following,
>
> 1. In the tag class, i put:
>
> pageContext.getRequest().setAttribute("QList", list);
>
>
>
> The above Tag will go to a servlet, i need to read the above request
> attribute in the servlet, how can i do this?, i tried
>
> List<Integer> list = (List<Integer>)request.getAttribute("QList");
>
> , but when i tried to access the read list, it gave me
> NullPointerException...What do u think?
>
>
> On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
>
>>
>> Hi Mohammed,
>> Cant say I really understand the question....
>>
>> In general this is what the Session Objects are for....
>> So say you have a servlet and a JSP page.... and say the servlet
>> makes the
>> bean with the Array List in it.... then if you
>>
>> session.setAttribute("MyBean", MyBean);
>>
>> you can get it (MyBean) back when the next call comes into say the JSP
>> page....
>>
>> Now if you read up on this you will see you can also set 'request'
>> objects.... and these are good for when you say dispatch a request to a
>> JSP
>> page from the servlet and want to pass a bean across.
>>
>> Anyway... if you just google for "servlet session and setAttribute"....
>> you
>> will be on your way... I think ;)
>> This area of servlet programming is one of the things that make it
>> such a
>> powerful technology.
>> Have fun...
>>
>> ----- Original Message -----
>> From: "Mohammed Zabin" <jo...@gmail.com>
>> To: "Tomcat Users List" <us...@tomcat.apache.org>
>> Sent: Monday, July 23, 2007 11:18 AM
>> Subject: Bean and Servlet
>>
>>
>> > Hi All
>> > What is the best way to pass a list collection from a Bean to a
>> Servlet?
>> > Thank you
>> >
>>
>>
>> ---------------------------------------------------------------------
>> To start a new topic, e-mail: users@tomcat.apache.org
>> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
>> For additional commands, e-mail: users-help@tomcat.apache.org
>>
>>
>
---------------------------------------------------------------------
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To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
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Re: Bean and Servlet
Posted by Mohammed Zabin <jo...@gmail.com>.
Thank you Johnny,
To be specific this is my question
Hi all
I am trying to pass an object from a tag to a servlet. i did the following,
1. In the tag class, i put:
pageContext.getRequest().setAttribute("QList", list);
The above Tag will go to a servlet, i need to read the above request
attribute in the servlet, how can i do this?, i tried
List<Integer> list = (List<Integer>)request.getAttribute("QList");
, but when i tried to access the read list, it gave me
NullPointerException...What do u think?
On 7/23/07, Johnny Kewl <jo...@kewlstuff.co.za> wrote:
>
> Hi Mohammed,
> Cant say I really understand the question....
>
> In general this is what the Session Objects are for....
> So say you have a servlet and a JSP page.... and say the servlet makes the
> bean with the Array List in it.... then if you
>
> session.setAttribute("MyBean", MyBean);
>
> you can get it (MyBean) back when the next call comes into say the JSP
> page....
>
> Now if you read up on this you will see you can also set 'request'
> objects.... and these are good for when you say dispatch a request to a
> JSP
> page from the servlet and want to pass a bean across.
>
> Anyway... if you just google for "servlet session and setAttribute"....
> you
> will be on your way... I think ;)
> This area of servlet programming is one of the things that make it such a
> powerful technology.
> Have fun...
>
> ----- Original Message -----
> From: "Mohammed Zabin" <jo...@gmail.com>
> To: "Tomcat Users List" <us...@tomcat.apache.org>
> Sent: Monday, July 23, 2007 11:18 AM
> Subject: Bean and Servlet
>
>
> > Hi All
> > What is the best way to pass a list collection from a Bean to a Servlet?
> > Thank you
> >
>
>
> ---------------------------------------------------------------------
> To start a new topic, e-mail: users@tomcat.apache.org
> To unsubscribe, e-mail: users-unsubscribe@tomcat.apache.org
> For additional commands, e-mail: users-help@tomcat.apache.org
>
>
Re: Bean and Servlet
Posted by Johnny Kewl <jo...@kewlstuff.co.za>.
Hi Mohammed,
Cant say I really understand the question....
In general this is what the Session Objects are for....
So say you have a servlet and a JSP page.... and say the servlet makes the
bean with the Array List in it.... then if you
session.setAttribute("MyBean", MyBean);
you can get it (MyBean) back when the next call comes into say the JSP
page....
Now if you read up on this you will see you can also set 'request'
objects.... and these are good for when you say dispatch a request to a JSP
page from the servlet and want to pass a bean across.
Anyway... if you just google for "servlet session and setAttribute".... you
will be on your way... I think ;)
This area of servlet programming is one of the things that make it such a
powerful technology.
Have fun...
----- Original Message -----
From: "Mohammed Zabin" <jo...@gmail.com>
To: "Tomcat Users List" <us...@tomcat.apache.org>
Sent: Monday, July 23, 2007 11:18 AM
Subject: Bean and Servlet
> Hi All
> What is the best way to pass a list collection from a Bean to a Servlet?
> Thank you
>
---------------------------------------------------------------------
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