Request dispatcher and mvc2

is there any one who has implemented the mvc2 architecture for a ecommerce
          website
          precisely has anyone used servlets to fetch data from ejbs and used the
          data to
          populate the display object.
          this display object is then forwarded to the jsp using
          getRequestDispatcher.forward(jsp page).
          any help is appreciated.
          

thanks.
          Heres the specific question.
          we are using weblogic 5.1 sp10 and the servlets call the session beans
          and get the data.
          this data is used to populate the display object which is forwarded to the
          jsp page using the requestdispatchers forward method.
          the jsp page then display the values which are set in the display object
          > > when multiple users hit the same page the results are crazy with user A
          > > seeing whole or part of data which user B
          > > is expecting. we will try to use the local variable approach..
          how can we solve the above problem?? we cant use HttpSession since its a
          webfarm approach.
          Cameron Purdy <[email protected]> wrote in message
          news:[email protected]...
          > Yes. Do you have any specific questions?
          >
          > Peace,
          >
          > --
          > Cameron Purdy
          > Tangosol, Inc.
          > Clustering Weblogic? You're either using Coherence, or you should be!
          > Download a Tangosol Coherence eval today at http://www.tangosol.com/
          >
          >
          >
          > "PD" <[email protected]> wrote in message
          > news:[email protected]...
          > > is there any one who has implemented the mvc2 architecture for a
          ecommerce
          > > website
          > >
          > > precisely has anyone used servlets to fetch data from ejbs and used the
          > > data to
          > > populate the display object.
          > >
          > > this display object is then forwarded to the jsp using
          > > getRequestDispatcher.forward(jsp page).
          > >
          > > any help is appreciated.
          > >
          > >
          >
          >
          

Similar Messages

  • Request dispatcher and jsp pages called from servlets

              Given the following webapp directory structure:
              root/
              jsp/
              ..all jsp files
              web-inf/
              classes/
              /servlets
                   ..all servlet files
              /com
              ..all other java class files
              I have the jsp directory coded as: jspdir = "/jsp/" (and have tried variations
              on this theme)
              I try to open a new jsp page with the following code in a servlet in the above
              servlet directory:
                   RequestDispatcher rd;
                   rd = getServletContext().getRequestDispatcher(jspdir + myjsp.jsp);
                   rd.forward(req, res);
              rd continues to return null.
              The jsp pages are not registered in the web.xml file for this webapp, if that
              makes any difference.
              Does anyone have any suggestions?     
              [problem.txt]
              

    I create a small sample and put these files into /jsp in my war context
              it works fine, please send me the example code you are using and the
              environment description of the deployed application
              I attached my samples, that work
              Filip
              ~
              Namaste - I bow to the divine in you
              ~
              Filip Hanik
              Software Architect
              [email protected]
              www.filip.net
              "Bill Blackmon" <[email protected]> wrote in message
              news:[email protected]...
              >
              > Yes, I am able to access the jsp pages with the url listed.
              >
              > "Filip Hanik" <[email protected]> wrote:
              > >The weblogic servlet engine, is by default mapping anything that ends
              with
              > >*.jsp to be a JSP.
              > >so there shouldn't be a problem. You didn't answer my first question,
              > >are you able to access your JSP through the browser?
              > >http://localhost:7001/root/jsp/myjsp.jsp
              > >
              > >Filip
              > >
              > >--
              > >~
              > >Namaste - I bow to the divine in you
              > >~
              > >Filip Hanik
              > >Software Architect
              > >[email protected]
              > >www.filip.net
              > >"Bill Blackmon" <[email protected]> wrote in message
              > >news:[email protected]...
              > >>
              > >> The code you are reading in the message here was pasted in and
              > >> looks bad, so maybe that's what you are referring to? The dispatcher
              code
              > >is called
              > >> in the service() method of the servlet.
              > >> I have a suspicion that the jsp directory needs to be defined someplace
              > >-
              > >weblogic.properties
              > >> or web.xml?, though I don't see this in any of the examples that come
              > >with
              > >the product.
              > >>
              > >>
              > >>
              > >> "Simon Ng" <[email protected]> wrote:
              > >> >
              > >> >Hello Bill,
              > >> > Did you put a <BR>
              > >> >return;
              > >> ><BR>
              > >> >statement right after the dispatcher.forward() statement? Well, I am
              > >assuming
              > >> >your
              > >> >code is in the doPost() or doGet() methods.
              > >> >
              > >> >Simon
              > >> >
              > >> >
              > >> >"Filip Hanik" <[email protected]> wrote:
              > >> >>if you do http://localhost:7001/root/jsp/myjsp.jsp
              > >> >>
              > >> >>do you get a result?
              > >> >>
              > >> >>make sure you have the right character case on the filename.
              > >> >>
              > >> >>Filip
              > >> >>
              > >> >>--
              > >> >>~
              > >> >>Namaste - I bow to the divine in you
              > >> >>~
              > >> >>Filip Hanik
              > >> >>Software Architect
              > >> >>[email protected]
              > >> >>www.filip.net
              > >> >>"Bill Blackmon" <[email protected]> wrote in message
              > >> >>news:[email protected]...
              > >> >>>
              > >> >>> Given the following webapp directory structure:
              > >> >>> root/
              > >> >>> jsp/
              > >> >>> ..all jsp files
              > >> >>> web-inf/
              > >> >>> classes/
              > >> >>> /servlets
              > >> >>> ..all servlet files
              > >> >>> /com
              > >> >>> ..all other java class files
              > >> >>>
              > >> >>>
              > >> >>> I have the jsp directory coded as: jspdir = "/jsp/" (and have tried
              > >> >>variations
              > >> >>> on this theme)
              > >> >>> I try to open a new jsp page with the following code in a servlet
              > >in
              > >> >the
              > >> >>above
              > >> >>> servlet directory:
              > >> >>> RequestDispatcher rd;
              > >> >>> rd = getServletContext().getRequestDispatcher(jspdir + myjsp.jsp);
              > >> >>> rd.forward(req, res);
              > >> >>>
              > >> >>> rd continues to return null.
              > >> >>>
              > >> >>> The jsp pages are not registered in the web.xml file for this
              webapp,
              > >> >>if
              > >> >>that
              > >> >>> makes any difference.
              > >> >>>
              > >> >>> Does anyone have any suggestions?
              > >> >>>
              > >> >>
              > >> >>
              > >> >
              > >>
              > >
              > >
              >
              [filipInclude.jsp]
              [filipForward.jsp]
              [filip.jsp]
              

  • Query Strings in Request Dispatcher Paths (PLT.16.1.1)

    I'm having trouble using query strings in a request dispatcher include to a servlet.
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  • Urgent, creating xml files dynamically, request dispatcher problem

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  • Request dispatcher null

              The forward code we have is like
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              throws ServletException, IOException
              RequestDispatcher dispatcher = getServletConfig().getServletContext().getRequestDispatcher(url);
              dispatcher.forward(request, response);
              My question is:
              As per the documents
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              context root.
              if my URL is "http://www.abcz.com/<somepage>
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              Rumpa
              

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              Bhaskar
              "Matt Krevs" <[email protected]> wrote in message news:<[email protected]>...
              > as far as i know, you should always specify relative urls when using request
              > dispatchers
              >
              > eg
              >
              > if the entire url is
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              > you would code as follows
              >
              > RequestDispatcher dispatcher =
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              > dispatcher.forward(request, response);
              >
              > You definitely should not use complete URLs when calling
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              >
              > what happens on the server that returns a null dispatcher if you manually
              > type the address into the browser? Does weblogic find the resource? If not
              > then you have something specified differently in your server that doesn
              > work.
              >
              >
              > "RUMPA GIRI" <[email protected]> wrote in message
              > news:[email protected]...
              > >
              > > The forward code we have is like
              > > /**********************************************/
              > >
              > > public void forward(String url, HttpServletRequest request,
              > > HttpServletResponse response)
              > > throws ServletException, IOException
              > > {
              > > RequestDispatcher dispatcher =
              > getServletConfig().getServletContext().getRequestDispatcher(url);
              > > dispatcher.forward(request, response);
              > > }
              > > /***********************************************/
              > >
              > > My question is:
              > > As per the documents
              > > The pathname must begin with a "/" and is interpreted as relative to the
              > current
              > > context root.
              > > if my URL is "http://www.abcz.com/<somepage>
              > > request dispatcher is null? and on one server (say A) that is a problem
              > but other
              > > server(say B) when given the full URL behaves ok.
              > > on server A I am getting a null pointer exception , which on tracing
              > happens to
              > > be the request dispatcher is null.(If http://www.abcz.com/<somepage> is
              > URL) but
              > > no null pointer exception if url is "/<somepage>"
              > > On B its behaving fine when given the "http://www.abcz.com/<somepage> " as
              > URL
              > > to the method.
              > > Both server A and B are running wl6. Is the difference in service pack
              > cause of
              > > the problem?
              > >
              > > Internally does wl6 parses the URL to find a relative URL?
              > >
              > > Any help will be greatly appreciated.
              > > Thanks
              > > Rumpa
              > >
              > >
              

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    Workprocess Table (long)               Tue Mar 15 11:44:30 2005
    ========================
    No Ty. Pid      Status  Cause Start Err Sem CPU    Time  Program  Cl  User         Action                    Table
    0 DIA      692 Ended         no      1   0             0                                                             
    1 DIA     3652 Ended         no      1   0             0                                                             
    2 UPD     2376 Ended         no      1   0             0                                                             
    3 ENQ     2216 Ended         no      1   0             0                                                             
    4 BTC     2404 Ended         no      1   0             0                                                             
    5 BTC     2192 Ended         no      1   0             0                                                             
    6 SPO     2428 Ended         no      1   0             0                                                             
    7 UP2     2440 Ended         no      1   0             0                                                             
    Dispatcher Queue Statistics               Tue Mar 15 11:44:30 2005
    ===========================
    +----
    +----
    +----
    +----
    +
    Typ
    now
    high
    max
    writes
    reads
    +----
    +----
    +----
    +----
    +
    NOWP
    0
    3
    2000
    10
    10
    +----
    +----
    +----
    +----
    +
    DIA
    5
    5
    2000
    5
    0
    +----
    +----
    +----
    +----
    +
    UPD
    0
    0
    2000
    0
    0
    +----
    +----
    +----
    +----
    +
    ENQ
    0
    0
    2000
    0
    0
    +----
    +----
    +----
    +----
    +
    BTC
    0
    0
    2000
    0
    0
    +----
    +----
    +----
    +----
    +
    SPO
    0
    0
    2000
    0
    0
    +----
    +----
    +----
    +----
    +
    UP2
    0
    0
    2000
    0
    0
    +----
    +----
    +----
    +----
    +
    max_rq_id          13
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              NextEngine, Inc.
              401 Wilshire Blvd., Ninth Floor
              Santa Monica, California 90401
              This email is intended only for the use of the individual or entity to which
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              > -Tao
              >
              > --
              >
              > Tao Ge
              > Software Engineer
              > [email protected]
              > (310) 883-1837
              >
              > NextEngine, Inc.
              > 401 Wilshire Blvd., Ninth Floor
              > Santa Monica, California 90401
              >
              > ---
              > This email is intended only for the use of the individual or entity to which
              > it is addressed and contains information that is privileged and
              > confidential. If the reader of this message is not the intended recipient
              > or the employee or agent responsible for delivering the message to the
              > intended recipient, you are hereby notified that any review, use, disclosure
              > or distribution of this communication is strictly prohibited. If you have
              > received this communication in error, please notify the sender immediately
              > by reply email and destroy all copies of the original message.
              > Thank you.
              

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