Frame to Servlet Communication

Hi Friends,
I can connect to the servlet through applet by using URLConnection, but the same code I am using for the Frame. I am unable to enter in to servlets it self. I am not getting any error.Any out put.The request is not entering into servlet . My code is
URL netUrl = new URL(url);
URLConnection urlConnection = netUrl.openConnection();
urlConnection.setUseCaches(false);
urlConnection.setDefaultUseCaches(false);
urlConnection.setDoInput(true);
urlConnection.setDoOutput(true);
urlConnection.setRequestMethod("POST");
Could you please help me on this. This is very urgent.

If you want to communicate from one Servlet to another, you normally POST to the other Servlet. If security is an issue, use SSL when posting. If you are using J5EE, the Servlet 2.5 spec allows Servlets to (finally) share context information. The code you posted would not work in 2.5, but converting it to work would involve only a few small changes. Another option (if J5EE is not viable) would be to use a vendor-specific solution, such as Tomcat's cross-context sharing ability. Finally, if both Servlets can access the same database, store the results in the database and then provide a mechanism whereby the other Servlet can be notified to pick up the data.
- Saish

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Problem in Applet Servlet communication in cluster

          Our new production server has been configured with
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          Please consider the following scenario :
          1. JSP#1(having embedded tag for Applet#1) is served by, say, WLInstance#1.
          2. JSP#2(having embedded tag for Applet#2) is served by, say, WLInstance#2.
          3. Applet#1 is loaded by BrowserInstance#1.
          4. Applet#2 is loaded by BrowserInstance#2.
          The way I understand applet-servlet communication is as follows :
          The servlets are invoked through the url-pattern specified in web.xml - if the applet
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          "Subir Das" <[email protected]> wrote:
          >So, Applet#1 will always talk to the servlet hosted by WLInstance#1 and
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How to define target window when redirecting within frames using servlet?

Howdy:
Is there a way to define target window when redirecting within frames using servlets?
How to do it in JSP as well?
T.I.A.
Oriental Spirit

Your servlet (or JSP) can't decide where it is going to be displayed. The browser has already decided that when it makes the request to your servlet.

Applet/servlet communication for byte transmission

Hello all !
I wrote an applet to transfer binary file from web servlet (running under Tomcat 5.5) to a client (it's a signed applet) but I have a problem of interpretation of byte during transmission.
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Some ideas to help me please ?

hi,
have you solved this issue.. please post me the code since i m also doing the applet/servlet communication and can use your code as reference.
how to read the content placed in the urlConnection stream in the servlet
Below is my code in applet
public void upload(byte[] imageByte)
          URL uploadURL=null;
          try
               uploadURL=new URL("<url>");
               URLConnection urlConnection=uploadURL.openConnection();
               urlConnection.setDoInput(true);
               urlConnection.setDoOutput(true);
               urlConnection.setUseCaches(false);
               urlConnection.setRequestProperty("Content-type","application/octet-stream");
               urlConnection.setRequestProperty("Content-length",""+imageByte.length);
               OutputStream outStream=urlConnection.getOutputStream();
               outStream.write(imageByte);
               outStream.close();
          catch(MalformedURLException ex)
          catch(IOException ex)
How can i read the byte sent on the outstream (in above code) in the servlet.
Thanks,
Mclaren

Asynchronous applet-servlet communication

Hi all,
I am trying to implement asynchronous applet-servlet communication and need your help. Anything would help(I tried with synchronous applet-servlet communication but doesn't solve my problem).
Thanks,

http://java.sun.com/docs/books/tutorial/networking/index.html
You can open a socket connection. Bother the client and the server
can have separate threads for reading and writing and that you gives you
asynchronous communication. Later, if you think the server is generating
too many threads and not scaling, you can use features of .java.nio to
make it more scalable:
java.nio.channels

Is there a good advanced review on applet-servlet communication

I am working on a web application and unfortunately experiencing a lot of trouble trying to use an applet as front end which interacts with a couple of servlets running on Tomcat. I need to get data from one servlet and send data to another.
There is a lot of messages posted in this and other forums about how to do this, but none of them got a response pointing to a useful advanced reference on this subject. I have reviewed some of the references given, but couldn't find a thorough detailed advanced reference on applet-servlet communication. For this I mean an exhaustive explanation of the mechanism of communication and when and when is neccesary to use each of the multiple configuration possibilities regarding content-type, message-length, request-method, connection settings, and so on.
Would anybody be so kind to show me the right direction? As I read the (literally) hundreds of messages posted on this topic, I see this info as widely useful. Most of the topic tracks ends on void or with painful no-way sentences, and maybe many people is avoiding Java technology on web application because of this problem (development delays can abort a project).

This sample chapter in Java developers' guide to Servlets and Jsp focuses on Applet-Servlet communication, is a pretty good one, and is free :
http://www.javaranch.com/bunkhouse/samps/2809ch12.pdf
As to an exhaustive & complete guide that covers absolutely everything, I may be wrong but I doubt you'll find anything like that...unless there is a book somewhere dedicated to the subject.

Inter servlet communication......is it possible ?

here i have posted "Inter servlet communication......is it possible ?"
have u come across this ?
http://forum.java.sun.com/thread.jspa?threadID=588996
thank you

sorry for the cross post. It wont be again. In fact i refered the link if anybody could give some comment. i saw some poster also post questions from diffrent topics of java.
My english is not good .
But why you are so tough on me ? you are targetting me in some of my posts. you have been helping learners for a long time . Old archieve /posts prove that. I dont claim my post are expert level. If you feel those are too simple for you plz ignore that.
thank you

Applet-servlet communication, object serialization, problem

hi,
I encountered a problem with tomcat 5.5. Grazing the whole web i didn't find any solution (some guys are having the same problem but they also got no useful hint up to now). The problem is as follows:
I try to build an applet-servlet communication using serialized objects. In my test scenario i write a serialized standard java object (e.g. a String object) onto the ObjectOutputStream of the applet/test-application (it doesn't matters wheter to use the first or the latter one for test cases) and the doPost method of the servlet reads the object from the ObjectInputStream. That works fine. But if i use customized objects (which should also work fine) the same code produces an classnotfound exception. When i try to read and cast the object:
TestMessage e = (TestMessage)objin.readObject();
java.lang.ClassNotFoundException: TestMessage
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1359)
    at org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1205)
    at java.lang.ClassLoader.loadClassInternal(ClassLoader.java:319)
...That seems strange to me, because if i instantiate an object of the same customized class (TestMessage) in the servlet code, the webappclassloader doesn't have any problems loading and handling the class and the code works fine!
The class is located in the web-inf/classes directory of the application. I've already tried to put the class (with and without the package structure) into the common/classes and server/classes directory, but the exception stays the same (I've also tried to build a jar and put it in the appropriate lib directories).
I've also tried to catch a Throwable object in order to get information on the cause. But i get a "null" value (the docu says, that this will may be caused by an unknown error).
I've also inspected the log files intensively. But they gave me no hint. Until now I've spend a lot of time on searching and messing around but i always get this classnotfound exception.
I hope this is the right place to post this problem and i hope that there is anyone out there who can give me some hint on solving this problem.
Kindly regards,
Daniel

hi, thanks for the reply,
all my classes are in the web-inf/classes of the web-app and have an appropriate package structure. thus the TestMessage class is inside a package.
i tried some names for the testclass but it didn't matter. the exception stays the same. I also tried to put the jar in the common/lib but the problem stays.
Well the problem with loaded classes: As i mentioned in the post above i can instantiate an object of TestMessage in the code without any problems (so the classloader of my webapp should know the class!!)
only when reading from the objectinputstream the classloader doesn't seem to know the class?? maybe theres a parent classloader resposible for that and doesn't know the class?
strange behaviour...
p.s. sending the same object from the servlet to the client works well
regards
daniel
Message was edited by:
theazazel

Applet/Servlet communication - StreamCorruptedException

Hi, I'm having a problem when I try to connect to a servlet. I am using applet/servlet communication. The problem only occurs when I have lauched a crystal report via http in a new window.
After the report is launched if I try to hit my servlet I get the following error:
java.io.CorruptedStreamException: invalid stream header
Not all crystal reports I launch cause this behavior but I can see nothing in the url I use to launch the report that is out of place or different than other reports.
APPLET-SERVLET CONNECTION
try {
StringBuffer path = new StringBuffer();
path.append(ip);
path.append("servlet/DatabaseServlet?");
path.append("option=getRecords&query=").append(URLEncoder.encode(query,"UTF-8"));
URL url = new URL(path.toString());
URLConnection servletConnection = url.openConnection();
servletConnection.setUseCaches(false);
servletConnection.setDoInput(true);
servletConnection.setDoOutput(true);
servletConnection.setRequestProperty("Content-Type", "application/x-java-serialized-object");
ObjectInputStream inputFromServlet = new ObjectInputStream(servletConnection.getInputStream());
rc = (RecordCollection) inputFromServlet.readObject();
inputFromServlet.close();
} catch (Exception e) {
e.printStackTrace();
SERVLET CODE
Forwards to doPost
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws ServletException, IOException {
System.out.println("session id: " + request.getSession().getId());
this.doPost(request, response);
LAUNCHING REPORT FROM APPLET
try {
String launchURL = host + directory + report + "?promptOnRefresh=0"+ "&" +
authentication + "&" + key + "&" + startPeriods + "&" + reportYears + "&" + reportTitle + "&" endPeriods "&" + locations + "&" + reportPeriod + "&" + fiscalWeek + "&" + fiscalYear + "&" +time;
context.showDocument(new URL(launchURL), "_blank");
} catch (Exception ex) {
ex.printStackTrace();
SAMPLE URL THAT CAUSES PROBLEM
http://localhost:113/Reports/OpenToBuy_3.class?promptOnRefresh=0&user0=rpuser&password0=er34sw1&[email protected]=rpuser&[email protected]=er34sw1&user0@sub2=rpuser&[email protected]=er34sw1&promptex-key="L","L1","ALL"&promptex-start="1"&promptex-years="2004","2004"&promptex-title="Report Title"&promptex-end="1"&promptex-locs="01","03","04","05"&promptex-period="Feb 2004 [04-01]"&promptex-cw="1"&promptex-cy="2004"&promptex-time=-2-52728"
Everything works fine until I launch this report then I can no longer get data from my servlet. I thought the URL lenght for the report might be the problem but I lauch a report with a URL longer than the problem one and there I don't get the errors after. When I try to connect to the servlet the println statement in the doGet method of my servlet doesn't get printed so it's not even making it inside that method in the servlet.
Anyone have any idea what could be causing this? Anyone have any ideas what would be causing this? I'm really stumped.

I've seen this problem before. Because your accessing a complete URL (ie http://<host>:<port>/xxx), you are actually creating a new session. Whenever the applet opens a connection to a servlet it is running on it's own session not the same as the JSP. This is rather obvious since the Page and Applet are separate entities.
Try sending authentication with the url. I think the syntax is:
username:password@http://localhost/xxx
However I'm not sure how well this might work for Tomcat. As for Java it may try and throw a MalformedURLException I would have to test it first - it's been a long time since I used this technique!
Wish I could be more help,
Anthony

Big Problem in Applet-Servlet Communication-(Help)

I wrote an method to send serialized objects from Applet to Servlet,
the method is as following:
private ObjectInputStream postObjects (URL servlet, Serializable objs[], String sessionID) throws Exception {
ObjectInputStream in = null;
ObjectOutputStream out = null;
try{
URLConnection con = servlet.openConnection();
con.setDoInput(true);
con.setDoOutput(true);
con.setUseCaches(false);
con.setRequestProperty("Content-Type","application/x-java-serialized-object");
con.setAllowUserInteraction(false);
con.setRequestProperty("Cookie", sessionID);
out = new ObjectOutputStream(con.getOutputStream());
int numObjects = objs.length;
for(int x = 0; x < numObjects; x++){
out.writeObject(objs[x]);
out.flush();
out.close();
in = new ObjectInputStream(con.getInputStream());
}catch(Exception e){
e.printStackTrace(System.err);
throw e;
}finally{
return in;
when I call this method, I got the following error message in Applet console,
my platform is Salaris 5.8 + iPlanet 6.0.
java.io.EOFException
     at java.io.ObjectInputStream$PeekInputStream.readFully(ObjectInputStream.java:2150)
     at java.io.ObjectInputStream$BlockDataInputStream.readShort(ObjectInputStream.java:2619)
     at java.io.ObjectInputStream.readStreamHeader(ObjectInputStream.java:726)
     at java.io.ObjectInputStream.<init>(ObjectInputStream.java:251)
     at com.shinewave.lms.core.client.ServletProxy.postObjects(ServletProxy.java:255)
     at com.shinewave.lms.core.client.ServletProxy.doInitialize(ServletProxy.java:76)
     at com.shinewave.lms.core.client.APIAdapterApplet.LMSInitialize(APIAdapterApplet.java:60)
java.lang.NullPointerException
     at com.shinewave.lms.core.client.ServletProxy.doInitialize(ServletProxy.java:77)
     at com.shinewave.lms.core.client.APIAdapterApplet.LMSInitialize(APIAdapterApplet.java:60)
java.lang.NullPointerException
     at com.shinewave.lms.core.client.ServletProxy.doInitialize(ServletProxy.java:82)
     at com.shinewave.lms.core.client.APIAdapterApplet.LMSInitialize(APIAdapterApplet.java:60)
Please help me to solve this problem, thank you very much.

Hi..
Sorry abt this. But I was hoping if u could help out on this..
I am trying to implement a applet to servlet communication...
wherin the servlet would read data from the database... and send it back to the applet which gets displayed on the applet...
But the problem is that the applet is not able to establish a connection with the servlet..
I am also using another supportive class whose object is basically passed from the servlet to the applet..
could u help me..
below is the piece of code...
APPLET:
import java.net.*;
import java.awt.*;
import javax.swing.*;
import java.awt.event.*;
import java.io.*;
import java.util.*;
public class TestApplet extends JApplet implements ActionListener
     JButton btnLoad;
     JTextField tfEmpno, tfFname, tfLname, tfSalary;
     URL url;
private String webServerStr = null;
private String hostName = "sandy";
private int port = 8085;
private String servletPath = "/jdbcTest.DBDetailsServlet";
public TestApplet()
     super();
// suppress Warning Message
getRootPane().putClientProperty"defeatSystemEventQueueCheck",Boolean.TRUE);
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          if(btnLoad.getText().equals("Load"))
               if(loadData())
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          else
               btnLoad.setText("Load");
//               saveData();
     public void init()
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          tfFname = new JTextField(10);
          tfLname = new JTextField(10);
          tfSalary= new JTextField(10);
          JPanel panel = new JPanel();
          panel.setLayout(new FlowLayout());
          panel.add(tfEmpno);
          panel.add(tfFname);
          panel.add(tfLname);
          panel.add(tfSalary);
          getContentPane().add(panel, BorderLayout.CENTER);
          JPanel bottom = new JPanel(new FlowLayout());
          btnLoad = new JButton("Load");
          btnLoad.addActionListener(this);
          bottom.add(btnLoad);
          getContentPane().add(bottom, BorderLayout.SOUTH);
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          try
     System.out.println("Web Server host name: " + hostName);
     webServerStr = "http://" + hostName + ":" + port + servletPath;
     System.out.println("Web String full = " + webServerStr);
               String servletGET = webServerStr + "?"
     + URLEncoder.encode("UserOption") + "="
     + URLEncoder.encode("AppletDisplay");
//               url = new URL(getCodeBase(),"http://sandy:8080/servlet/jdbcTest.DBDetailsServlet");
               System.out.println("Complete Servlet Url => " + servletGET);
               url = new URL(servletGET);
               URLConnection con = url.openConnection();
               con.setUseCaches(false); // Turn off caching.
               InputStream in = con.getInputStream();
               System.out.println("\nsuccess ....... con.getInputStream() ");
               ObjectInputStream ois = new ObjectInputStream(in);
               System.out.println("\nsuccess ....... new ObjectInputStream(in) ");
               Object object = ois.readObject();
               System.out.println("\nGot the object from servlet...");
               if(object != null)
                    System.out.println("\nObject NOT null ...");
                    ArrayList result = (ArrayList) object;
                    jdbcTest.EmployeeValue empval = (jdbcTest.EmployeeValue) result.get(0);
                    tfEmpno.setText(""+empval.getEmp_no());
                    tfFname.setText(empval.getFname());
                    tfLname.setText(empval.getLname());
                    tfSalary.setText(""+empval.getSalary());
                    System.out.println("\nObject processed " + result);
                    repaint();
               return true;
          catch(Exception e)
               e.printStackTrace();
               System.out.println("\n\n loadData()=> E X C E P T I O N : " + e + "\n");
               return false;
     public void saveData()
          //yet to be implemented..
SERVLEt:
package jdbcTest;
import java.util.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.http.*;
public class DBDetailsServlet extends HttpServlet
     public void doGet(HttpServletRequest req,HttpServletResponse res )throws ServletException, IOException
          System.out.println("\nInside the doGet()\n");
          ArrayList results = getDetails();
          ObjectOutputStream oos = new ObjectOutputStream(res.getOutputStream());
          oos.writeObject(results);
     public void doPost(HttpServletRequest req,HttpServletResponse res )throws ServletException, IOException
          System.out.println("\nInside the doPost()\n");
          doGet(req,res);
     public ArrayList getDetails()
          try
               System.out.println("\nServlet : inside GetDetails...");
               Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
               java.sql.Connection con = java.sql.DriverManager.getConnection("jdbc:odbc:SandyDSN","","");
               java.sql.Statement stmt = con.createStatement();
               System.out.println("\n Statement created..");
               java.sql.ResultSet rs = stmt.executeQuery("SELECT * FROM EMP WHERE EMP_NO = 222");
               System.out.println("\n Query Executed...");
               ArrayList results = new ArrayList();
               while(rs.next())
                    EmployeeValue empval = new EmployeeValue();
                    empval.setEmp_no(rs.getLong("EMP_NO"));
                    empval.setFname(rs.getString("FNAME"));
                    empval.setLname(rs.getString("LNAME"));
                    empval.setSalary(rs.getLong("SALARY"));
                    results.add(empval);
               System.out.println("\n Resultset Obtained...");
               stmt.close();
               con.close();
               return results;
          catch(Exception e)
               System.out.println("Error while retreiving details....." + e);
               return null;
     public boolean saveDetails(EmployeeValue empval)
          try
               return true;
          catch(Exception e)
               System.out.println("Error while updating details....." + e);
               return false;
The utility class EMployeeValue is as below:
package jdbcTest;
import java.io.*;
class EmployeeValue implements Serializable
     private long emp_no;
     private String fname;
     private String lname;
     private long salary;
     public EmployeeValue()
          super();
     public EmployeeValue(long eno, String fn, String ln,long sal)
          super();
          setEmp_no(eno);
          setFname(fn);
          setLname(ln);
          setSalary(sal);
     public long getEmp_no()
          return emp_no;
     public java.lang.String getFname()
          return fname;
     public java.lang.String getLname()
          return lname;
     public long getSalary()
          return salary;
     public void setEmp_no(long newEmp_no)
          emp_no = newEmp_no;
     public void setFname(java.lang.String newFname)
          fname = newFname;
     public void setLname(java.lang.String newLname)
          lname = newLname;
     public void setSalary(long newSalary)
          salary = newSalary;

Servlet Communication with Java WebStart

Hi there,
we have an application that works fine with Java WebStart whenever we start it in a local area network. But from outside the LAN the application cannot communicate to it's servlets. I use the codebase IP address with the servlet runner's port (http://<codebase IP>:port/) as URL for servlet communication, but the application's request never reaches the servlets.
My question is now, if anyone had the same or a similar problem with servlet communication using Java WebStart, or if anyone knows, if that might be a problem with proxy configuration.
The servlet runner we use, is JServ from Sun (JSDK2.0) and the webserver where it is running on is not behind a firewall or a proxy, but the client PC with the web start application is.
Thanks,
Katja

Thank you for your early reply. But I think, that's not the problem.
I get no security error and the webserver is identified the same way it is in the jnlp file. Also my application is not running in the Sandbox. My assumption is, that the http-request to the servlet does not go through the proxy server between my PC and the PC the servletrunner is running on.
I wonder if I have to configure my application to use a proxy server for communication with the servlets instead of the direct http-request to the servlet runner?

Applet to servlet communication

Hi all,
I am having a problem about applet servlet communication.
I am having a string array object in the applet which I want to
pass it to the servlet for further processing.
Please help me to solve this problem.It is very urgent.
If you can send me the code for that I would be very thankful to you all.
Feel free to mail me at [email protected]

I guess you are stugling with the sollution of how to send an object from an applet to the
servlet:
Sollution is here:
http://forum.java.sun.com/thread.jspa?threadID=625045&messageID=3562787
Assuming that all these posts are about solving the same problem:
http://forum.java.sun.com/thread.jspa?threadID=642015&messageID=3783853#3783853
http://forum.java.sun.com/thread.jspa?threadID=642013&messageID=3783839#3783839
http://forum.java.sun.com/thread.jspa?threadID=641689&messageID=3779038#3779038
http://forum.java.sun.com/thread.jspa?threadID=641685&messageID=3779004#3779004

Need help with applet servlet communication .. not able to get OutputStream

i am facing problem with applet and servlet communication. i need to send few image files from my applet to the servlet to save those images in DB.
i need help with sending image data to my servlet.
below is my sample program which i am trying.
java source code which i am using in my applet ..
public class Test {
    public static void main(String argv[]) {
        try {
                URL serverURL = new URL("http://localhost:8084/uploadApp/TestServlet");
                URLConnection connection = serverURL.openConnection();
                Intermediate value=new Intermediate();
                value.setUserId("user123");
                connection.setDoInput(true);
                connection.setDoOutput(true);
                connection.setUseCaches(false);
                connection.setDefaultUseCaches(false);
                // Specify the content type that we will send binary data
                connection.setRequestProperty ("Content-Type", "application/octet-stream");
                ObjectOutputStream outputStream = new ObjectOutputStream(connection.getOutputStream());
                outputStream.writeObject(value);
                outputStream.flush();
                outputStream.close();
            } catch (MalformedURLException ex) {
                System.out.println(ex.getMessage());
            } catch (IOException ex) {
                    System.out.println(ex.getMessage());
}servlet code here ..
public class TestServlet extends HttpServlet {
     * Processes requests for both HTTP <code>GET</code> and <code>POST</code> methods.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
    protected void processRequest(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
         System.out.println(" in servlet -----------");
        response.setContentType("text/html;charset=UTF-8");
        PrintWriter out = response.getWriter();
        ObjectInputStream inputFromApplet = null;
        Intermediate aStudent = null;
        BufferedReader inTest = null;
        try {
            // get an input stream from the applet
            inputFromApplet = new ObjectInputStream(request.getInputStream());
            // read the serialized object data from applet
            data = (Intermediate) inputFromApplet.readObject();
            System.out.println("userid in servlet -----------"+ data.getUserId());
            inputFromApplet.close();
        } catch (Exception e) {
            e.printStackTrace();
            System.err.println("WARNING! filename.path JNDI not found");
        } finally {
            out.close();
    @Override
    protected void doGet(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        System.out.println(" in foGet -----------");
        processRequest(request, response);
     * Handles the HTTP <code>POST</code> method.
     * @param request servlet request
     * @param response servlet response
     * @throws ServletException if a servlet-specific error occurs
     * @throws IOException if an I/O error occurs
    @Override
    protected void doPost(HttpServletRequest request, HttpServletResponse response)
            throws ServletException, IOException {
        System.out.println(" in doPost -----------");
        processRequest(request, response);
     * Returns a short description of the servlet.
     * @return a String containing servlet description
    @Override
    public String getServletInfo() {
        return "Short description";
    }// </editor-fold>
}the Intermediate class ..
import java.io.Serializable;
public class Intermediate implements Serializable{
String userId;
    public String getUserId() {
        return userId;
    public void setUserId(String userId) {
        this.userId = userId;
}

Hi,
well i am not able to get any value from connection.getOutputStream() and i doubt my applet is not able to hit the servlet. could you review my code and tell me if it has some bug somewhere. and more over i want to know how to send multiple file data from applet to servlet . i want some sample or example if possible.
do share if you have any experience of this sort..
Thanks.

Frames with Servlets. Techniques?

I built some frames with servlets with Jdevelopper
like HOTEL EJB application from the Technet.
Working in a frameset, after getting the parameter from fhe
first frameset, i want to generate a new page in an other
frameset or another frame ( from left to right for example).
I don't know how to make it.
Does anybody has an idea?
Thanks
null

Chris Tournier (guest) wrote:
: I built some frames with servlets with Jdevelopper
: like HOTEL EJB application from the Technet.
: Working in a frameset, after getting the parameter from fhe
: first frameset, i want to generate a new page in an other
: frameset or another frame ( from left to right for example).
: I don't know how to make it.
: Does anybody has an idea?
: Thanks
I had the same doubts as you.
In the main page (FRAMESET) you should set the name of
the frames , for example "LPAGE" for left frame and
"MAIN" for right frame.
In the hyperlinks of left page you must put the
reserved word "TARGET" with the destination frame name :
<A> HREF="www.dummy.com" TARGET="MAIN" dummy page </A>
This should resolve your problem.
Eduardo Murai
[email protected]
Discover Technology
null

Applet Servlet communication (urgent)

Hi,
I m using Netscape Enterrpise server 4.0 as my web server. I am passing data from applet to servlet using BufferedInputStream(). But it takes about 30 seconds to send the data. If i don't use it, the data is not being read by the servlet. Is there any alternative to this ? Please help.
Thanks

It's only the primary key field that i am passing to the servlet from applet .. For this particular process, it takes 30 seconds + other things like loading the applet, etc. so in all, it takes about 1 minute just to fetch the data from servlet which is not reasonable. We have monitored the whole process. We found that other things like query, etc. does not take much time, but BufferedInputStream() itself takes 30 seconds. Regarding communication line, it is quite fast. We are a corporate sector, so no doubt about the speed of the communication line ...
Thanks for help.

Frame to Servlet Communication

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