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Servlet Session + have not Clue....HELP....PLEASE...

sam patel
Ranch Hand

Joined: Jun 13, 2002
Posts: 103
Hi,
THis is what i had created, a servlet project using Jbuilder 7 and TomCat 4.0 that get Images from DB and displays it on the
Browser depending on what documentType the user selected....
If i run the Tom-cat on my machine and then run my project, It runs fine...
If i goto another machine and run my project, i get Two different frames one from my machine that has Tom-Cat running
and another one from the new new machine....
I need to Create a session for each user....
The problem is I am not familiar with Sessions.. I searched on Internet for examples but i got more confused.
I would appreciate if you can point me on right direction.....
================================================================
I am posting my Code....
========================

import javax.servlet.*;
import javax.servlet.http.*;
import java.io.*;
import java.util.*;
/**
* <p>Title: </p>
* <p>Description: </p>
* <p>Copyright: Copyright (c) 2003</p>
* <p>Company: </p>
* @author unascribed
* @version 1.0
*/
public class Servlet1 extends HttpServlet implements java.io.Serializable {
static final private String CONTENT_TYPE = "text/html";
private String dbDriver = "sun.jdbc.odbc.JdbcOdbcDriver";
private String dbURL = "jdbc dbc:SCANODBC_LIVE";
private String userid = "SYSDBA";
private String passwd = "masterkey";
private String nextLine = "\n";
private String fx = null;
private String lx = null;
private String dx = null;
private String sx = null;
private String px = null;
private String mx = null;
private String pidx = null;
private String policyNumber = null;
private String pid = null;
private String firstName = null;
private String lastName = null;
private String SSN = null;
private String MI = null;
private String index = null;
StringBuffer outputOfImageScreen = new StringBuffer();
private int k;
private int id;
public DatabaseAccessor databaseAccessor = null;
CreateScript createScript = new CreateScript();
//Initialize global variables

public void init(ServletConfig config) throws ServletException {
super.init(config);
System.out.println("DBServlet init: Start");
String value = null;
// read in parameter value for dbDriver
if ( (value = config.getInitParameter("dbDriver")) != null )
{
dbDriver = value;
}
// read in parameter value for dbDriver
if ( (value = config.getInitParameter("dbURL")) != null )
{
dbURL = value;
}
// read in parameter value for used id
if ( (value = config.getInitParameter("userid")) != null )
{
userid = value;
}
// read in parameter value for dbDriver
if ( (value = config.getInitParameter("passwd")) != null )
{
passwd = value;
}
databaseAccessor = new DatabaseAccessor(dbDriver, dbURL, userid, passwd);
log("Database Connection...");
}
//Process the HTTP Get request
public void doGet(HttpServletRequest request, HttpServletResponse response) throws ServletException, IOException {
response.setContentType(CONTENT_TYPE);
PrintWriter out = response.getWriter();
/*
HttpSession session = request.getSession(true);
Date created = new Date(session.getCreationTime());
Date accessed = new Date(session.getLastAccessedTime());
out.println("ID " + session.getId());
out.println("Created: " + created);
out.println("Last Accessed: " + accessed);
*/
// creates the Search Form
out.println(createScript.createSearchForm());
}
//Process the HTTP Post request
public void doPost(HttpServletRequest request, HttpServletResponse res)
throws IOException, ServletException
{
String xParameterName = null;
String xParameterValue = null;
PrintWriter out = res.getWriter();
Enumeration e = request.getParameterNames();

while (e.hasMoreElements()) {
xParameterName = (String) e.nextElement();
xParameterValue = request.getParameter(xParameterName);

if ((xParameterValue.trim().length() !=0 )){
if(xParameterName.compareTo("firstnameTextfield")==0){
}
else if(xParameterName.compareTo("lastnameTextfield")==0){
}
else if(xParameterName.compareTo("policynumberTextfield")==0){
StringBuffer outstring = new StringBuffer();
outstring.append(createScript.policyReCreateSearchForm(xParameterValue));
outstring.append(createScript.setTopPart());
outstring.append(createScript.getHeader());

Vector policyInformationVector1 = getPolicyInformation(res, xParameterValue);
Iterator iter = policyInformationVector1.iterator();
PolicyInformation aPolicyInformation = null;
while(iter.hasNext()){
Object[] data = new String[policyInformationVector1.size()];
for (int ii=0; ii < data.length; ii++){
int rowNum = ii + 1;
aPolicyInformation = (PolicyInformation) iter.next();
fx = aPolicyInformation.getFirstName();
lx = aPolicyInformation.getLastName();
dx = aPolicyInformation.getDOB();
sx = aPolicyInformation.getSSN();
px = aPolicyInformation.getPolicyNumber();
mx = aPolicyInformation.getMiddleName();
pidx = aPolicyInformation.getPid();
outstring.append(createScript.setRowValue(fx,mx,lx,px,pidx,dx,sx,rowNum));
outstring.append(createScript.setRowValue1());
}
}
outstring.append(createScript.getBottom());
out.println(outstring.toString());
}
else if(xParameterName.compareTo("ssnTextfield")==0){
}
}
// gets the PID
if(xParameterName.compareTo("pid") == 0){
pid = request.getParameter("pid");
policyNumber = request.getParameter("policyNumber");
firstName = request.getParameter("firstName");
lastName = request.getParameter("lastName");
SSN = request.getParameter("ssn");
MI = request.getParameter("mi");
Vector documentInformationVector = databaseAccessor.getDocumentInformation(pid,policyNumber);
Iterator iter = documentInformationVector.iterator();
DocumentInformation documentInformation = null;
outputOfImageScreen.append(createScript.createTopPartOfZoomScript());
outputOfImageScreen.append(createScript.createZoomLabels());
outputOfImageScreen.append(createScript.startOfDocumentList());
while(iter.hasNext()){
Object[] data = new String[documentInformationVector.size()];
for (int ii=0; ii < data.length; ii++){
documentInformation = (DocumentInformation) iter.next();
String docType = documentInformation.getDocumentType();
int uindex = documentInformation.getUindex();
int pindex = documentInformation.getPIndex();
if(uindex != 0){
outputOfImageScreen.append(createScript.insertDocumentTypeToListUindex(docType, uindex));
}
else{
outputOfImageScreen.append(createScript.insertDocumentTypeToListPindex(docType, pindex));
}
}
}
outputOfImageScreen.append(createScript.endOfWholeZoomScreen());
out.println(outputOfImageScreen.toString());
}
if(xParameterName.compareTo("index") == 0){
String indexValue = null;
index = request.getParameter("index");
if(index.startsWith("pindex")){
indexValue = index.substring(7);
databaseAccessor.getImageFromPolicy(indexValue);
}
else{
indexValue = index.substring(6);
databaseAccessor.getImageFromUnmatch(indexValue);
}
out.println(outputOfImageScreen.toString());
}
} // end of while(e.hasMoreElements())
}
//getPolicyInformation
protected Vector getPolicyInformation(HttpServletResponse response,String xParameterValue){
Vector policyInformationVector = databaseAccessor.getPolicyInformation(xParameterValue);
return policyInformationVector;
}

//Clean up resources
public void destroy() {
}

}
 
I agree. Here's the link: http://aspose.com/file-tools
 
subject: Servlet Session + have not Clue....HELP....PLEASE...