User session object

Hi,
I am using ADF BC and JSF.
From my knowledge about ADF Business Component, the java classes are
generated by the Entity Objects or View Objects.
My Question is : How can I create a user object that has many variables such as
staff id, name, age..etc. And the user object can be accessed by the web pages to
display the relevent information. But the user object is not related to a specific
table.
Is it correct that I should use the managed bean to hold the user information ?
where I can have the releveant information ?

Hi,
Two things on session's in ias-web.xml
1)
<impl> VALUE </impl>
VALUE: "lite" This means session data is maintained in the individual
kjs engines
VALUE: "distributed" This means session data is maintaned by the kxs
and is shared over multiple kjs engines in one IAS instance
2)
<dsync> VALUE </dsync>
VALUE: "dsync-local" This means that the kxs keeps the session data
itself
VALUE: "dsync-distributed" This means session data is written to and
read from the Primary server in a cluster
Switch your <impl> to distributed and your problem will be solved (i
think)
Robert
Andre Paradis wrote:
Hi,
I have a servlet which add a serializable object in the user sesion,
but this object is null in JSPs (getAttribute() ) when using multiple
KJS process and unregistered JSPs (ias 6.0 SP4)
I'm using lite session. Any idea??
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Similar Messages

Terminate a User session in the Portal

Hello,
is it possible to terminate a user session.
I want to delete a user, but I get the following error log:
- user delete failed
- Cannot lock at least one of the 4 locks for the owner
What is necessary to perform, before I am able to delete the user?
Thanks for your help!
Best regards,
Michael

Michael,
I think there is a distinction between deleting a user, and a user session. If you want to delete a users session, object locks must be cleared first. Users, as you know are deleted on UME Admin. On NW2004s the UME Admin is now called Identity Management.
Regards,
James

Multi User session mgmt, Multiple Session objects

I am creating a multiple user web application where in each user information is handled separately. when user log in a session is created and all info of this user is stored in this session object. But when another user logs in information of first user is displayed for the second user and overwriting the first user info in session object.
Question : Can each user have a different session object so that session info is not overwritten.
thanks
Kaushik
[email protected]

If I understand it correctly, eventhough the two users are in different sessions, their session information is being mixed up...correct.
Are you using JSP? If you are using JSP, and you declared the variables in the <%! variable x = new String("Test"); %>, then that variable is considered static. Therefore, when another user logs in and you replace the variable, you are changing the static variables value...Remember, JSP is basically compiled into a java class, and you are creating a static variable by doing what I think you are doing.
Do you think you can provide more information as to what you are doing?

How can I use active user session that's in an application scope Hashtable?

First of all, is it possible to use the same session after a user exits and then returns?
Second, if it is possible, then please tell me what I need to do. So far, this is what I have been doing...
1.) The user submits login credentials
2.) The user is authenticated.
3.) The user does not have an existing session, so a new one is created.
4.) The user closes the browser.
5.) The user returns to login page and submits login credentials.
6.) The user is authenticated.
7.) The user has an existing session, so it should be used.
This is where I'm having trouble. All active sessions for my application are stored in a Hashtable. I have been using <%@ page session="false" %> so that a new session is not automatically created. Each time before I create a new session, I check my Hashtable to see if that user has an existing session. If a session exists for that user, then I would like to continue using that session if possible. I have used the methods request.getSession() and request.getSession(false), but a new session is always returned.
I could create a new session, copy the attributes from the old session(which is stored in my Hashtable) to the new session, and then invalidate the old session, but I'd rather not do that.
Is there a way that I can use existing sessions that I have stored in my Hashtable?

First of all, is it possible to use the same session after a user exits and then returns?No, I don't think so. Let me explain why. When the server creates a session object for each client, it needs to know which client is making the request. Remember that HTTP is a stateless protocol. Every time a client makes a request, it sends some sort of session id to the server to let the server know who is trying to make the request. The server will then check to see if a session object exists for that particular client and if so, it will make sure that the max inactive interval (maximum time alloted for that client's session) has not been exceeded. If every thing is okay, then the client can access the session object to get values that were previously placed there. There are many ways that servers try to keep track of clients. One way is to have the clients write the session ID using cookies. But, many people like disallow cookies. So some servers do what is known as URL rewriting. That is, they will write the session ID on the end of the query string. This can also be accomplished programmatically, but it can be taxing to do. Anways, the point is that the client and the server have to have some sort of link between each other and that link is the session ID. So, if the browser is closed, the session ID is lost. That particular client will be forced to get a new session ID the next time the following code is executed:
//create a session object and set its values
HttpSession session = request.getSession(true);>
Second, if it is possible, then please tell me what I
need to do. So far, this is what I have been doing...
1.) The user submits login credentials
2.) The user is authenticated.
3.) The user does not have an existing session, so a
new one is created.
4.) The user closes the browser.
5.) The user returns to login page and submits login
credentials.
6.) The user is authenticated.
7.) The user has an existing session, so it should
be used.If you really want to do something like this, you could make up your own ID and store it as a cookie on the client. I've never tried anything like this before so you would have to do your own research. Are you sure you want to do something like this. There is a reason why it works the way it does. There is also a reason why you want to keep the session timeout value some what small. Let me give you an example of some craziness with sessions. A client we once had wanted to keep their sessions open for 4 hours because they said there clients simply did not like to log in all the time. I nearly gasped when I was told we needed to do this. When you make the session time out large (i.e. the maxInactiveInterval( )), then session objects stick around longer in the server. Let's say a client logs into the server and receives a session object. Then, the client makes a few requests. The server knows to keep the session alive as long as the time between requests has not exceeded 4 hours. Then the client closes the browser. How is the server suppose to know that the browser was closed. Well, it doesn't. It just knows to check times between requests. So, that particular session object won't be garbage collected until the session times out. What if a whole bunch of clients did this. Yucko. The server would have a whole bunch of session objects living in memory. What a waste. This is all above and beyond the typical security problems that can arise from having a session open for so long. To make a long story short, you really shouldn't do what you are trying to do unless it is the nature of the app.
>
This is where I'm having trouble. All active sessions
for my application are stored in a Hashtable. I have
been using <%@ page session="false" %> so that a new
session is not automatically created. Each time
before I create a new session, I check my Hashtable
to see if that user has an existing session. If a
session exists for that user, then I would like to
continue using that session if possible. I have used
the methods request.getSession() and
request.getSession(false), but a new session is
always returned.
I could create a new session, copy the attributes from
the old session(which is stored in my Hashtable) to
the new session, and then invalidate the old session,
but I'd rather not do that.
Is there a way that I can use existing sessions that I
have stored in my Hashtable?

I need to add the values stored in the session object into the html textbox

Dear Sir,
i have been trying to create an edit employee details page
What i have done till now is as follow:
1. Got employee id from HTML page.
2. Compared it with the id stored in the database.
3. If the id is correct then pulled the record of the corresponding employee and stored it in the session object.
4. Dispatched the session values to another servlet EditEmpDetails2.java
what i need to do now
5. Now i need to set the session values in the text field of the html form
6. I also need to be able to edit those vales and store the edited values in the database.
Please help me as i have tried doing it for 1 week without any clues
i have tried to create a html page which is something like this:
<html>
<head>
<title>Edit Employee Details Page</title>
<body BGCOLOR="red" text="black">
<h1 ><font color="black">Edit Employee Details Page</font></h1>
<form action = "EditEmpDetails" method="Get">
<table width="50% align="center"
<tr><td>Employee ID: </td>
<td><INPUT TYPE="TEXT" name="employeeid"<br></td></tr>
<tr><td><center><input type="submit" value="submit"></center></td></tr>
<tr><td><center><input type="reset" value="reset" ></center></td></tr>
</table>
</form>
</body>
</html>
design of my servlet EditEmpDetails.java
public void EditEmpDetails1 extends HttpServlet
public void doGet(HttpServletRequest request, HttpServletResponse response)throws ServletException, IOException
PrintWriter out = response.getWriter();
response.setContentType("text/html");
HttpSession session = request.getSession();
String employeeid;
String X = request.getParameter("employeeid");
System.out.println("Employee iD:" + X);
Class.forName("sun.jdbc.odbc.JdbcOdbcDriver");
Connection con = DriverManager.getConnection("jdbc:odbc:murphy");
String query = "Select * from users where employeeid=?";
PreparedStatement stat = con.prepareStatement(query);
System.out.println(stat);
stat.setString(1,X);
ResultSet rs = stat.executeQuery();
while(rs.next())
String Z = rs.getString(password);
if(Z.equals(X))
String A = rs.getString(1);
session.setAttribute("employeeid", A);
String B = rs.getString(2);
session.setAttribute("firstname", B);
String C = rs.getString(3);
session.setAttribute("lastname", C);
String D = rs.getString(4);
session.setAttribute("gender", D);
String E = rs.getString(5);
session.setAttribute("dateofbirth", E);
String F = rs.getString(6);
session.setAttribute("address", F);
String G = rs.getString(7);
session.setAttribute("postalcode", G);
String H = rs.getString(8);
session.setAttribute("phone", H);
String I = rs.getString(9);
session.setAttribute("mobile", I);
String J = rs.getString(10);
String url = "/EditEmpDetao;s.java";
RequestDispatcher dispatcher = getServletContext().getRequestDispatcher(url)
dispatcher.forward(request,response);
catch (Exception e)
system.out.println(e)
I do not know how to put the values stored in the session object into the html text box

3. If the id is correct then pulled the record of the corresponding employee and stored it in the session object.do you really need to store this in session object?
5. Now i need to set the session values in the text field of the html form which form? in a new html/jsp page? i suggest go for a JSP
In your JSP page use JSP expression tags to put the session attributes.
it's something like : <input type='text' name='employeeid' value='<%= session.getAttribute("employeeid") %>' >and you need to generateanother servlet for saving the details/modifications to the database.
I think i m clear enough.
if you need more clarifications. just try it and then post your problem.
Diablo

How to use a Session object in a Javascript function

I have an object that I have set in my session.
On my jsp I want to pull it out of my session and use it as a parameter for a javascript function. But I am not sure how to do that... the function call is below... I want to assign a value to ifFormat (last variable in function) But I am not sure what to use inside javascript.
<script type="text/javascript">
     Calendar.setup({inputField:"f_date_dfFirstPmtDate",
                                          button:"f_trigger_dfFirstPmtDate",
                                         singleClick:true,
                                          ifFormat:XXXXX});
</script>

Note that javascript runs on the client side, and JSP runs on the server. JSP and the session objects are NOT available to javascript in reaction to the user.
If this function is called only when the page is first created, not when the user interacts with the page, or if you want that value to be constant with respect to the javascript, then you can do this:
<%
String someValue = (String)session.getAttribute("theAttributeName");
%>
<script type="text/javascript">
     Calendar.setup({inputField:"f_date_dfFirstPmtDate",
                                          button:"f_trigger_dfFirstPmtDate",
                                         singleClick:true,
                                          ifFormat:<%=someVale%>});
</script>

How to use session object in jsp

hi all
marry christmas
can anyone plz tell me how to use session obect in jsp
rachna
Message was edited by:
rachna_arora82

hi rachna,
JSP has a default(implicit) session object...... use the getSession(true) method on the session object and then going u can either get or set attributes depending on the requirement
That was in general and now with the issue u have got..... what u can do is that the u can create session for every user who logs in and when he/she tries to login again then u can probably check for the existing session object in the JSP and perform the logic as required..... any clarifications plzzzzzzz let me know
Thanks n Regards
Naveen M
Message was edited by:
Novice_inJAVA
Message was edited by:
Novice_inJAVA

How to implement a Session Object.

Hi,
If anybody show me any example of how to implement
session object so that I can store any parameters such as user id and use it later on. And also if there is any good web site for reference about using session object.
thanks

You can use the the session.setAttribute and session.getAttribute methods.
For example let's say you would want to store a username in the session after a user has logged on:
String usrname = request.getParameter("username");
session.setAttribute("myStoredUsername", usrname);
you can then retrieve it using the get method. Remember that the entities stored inside a session object are generic objects and need to be cast to be used:
String usrname2 = (String)session.getAttribute("username");
Hope this helps
Chelman

How to validate a session object in jsp?

Hi All,
i am facing a problem.The problem is how to validate the session object object in jsp.I have written a java script by using a defined function as setInterval and has given 5 mintues if the user is idle and will show a pop up menu before time out the session but in case of page active still this pop up menu is coming. The java script as follows.
function SetTimer(){
     //How long before timeout (should be a few minutes before your server's timeout
     //set timer to call function to confirm update
     if(timeoutMinutes)
     timerObj = setInterval("ConfirmUpdate()",60000);
function clearTimerFn(){
          timerCount = 0;
          clearInterval(timerObj);
          //timerObj = setInterval("ConfirmUpdate()",60000);
function ConfirmUpdate(){
     //Ask them to extend
     if(confirm("Your session is about to expire. Press 'OK' to renew your session.")){
          //load server side page if ok
          var url = "ajaxSessionchecker.do?sessionvalidate=sessionvalid";
          LoadXMLDoc(url);
And in jsp i am calling this js function as
<%session=request.getSession(false);
          if(session.getLastAccessedTime()==60000){ %>
          <script type="text/JavaScript">
     clearTimerFn();
</script>
<%}else{
session.setMaxInactiveInterval(-1000);} %>
could you pls help me out?

The reason for doing this is when ever i come to this user.jsp from account.jsp with a different account number this user.jsp is not refreshed and i still
see the same old user.jsp for the previous account that i naviated before. Also please let me know if there is any other approach to acheive this taskDoes refreshing the page by pushing F5 solve the problem?
If so, then the browser is caching the page, despite your attempts to stop it.

Get session object in a class

hi,
is possible obtain the session object in a class method without send it from jsp as a parameter?

you mean like this?
     public ActionForward execute(
          ActionMapping mapping,
          ActionForm form,
          HttpServletRequest req,
          HttpServletResponse res)
          throws Exception {
          SessionManager sm = new SessionManager(req);
                                ....sessionmanager class
package com....;
import java.util.*;
import java.lang.reflect.*;
import java.io.*;
import javax.servlet.*;
import javax.servlet.jsp.*;
import javax.servlet.http.*;
import org.apache.log4j.*;
* <code>SessionManager</code> is a wrapper for request, response and session
* @author
public class SessionManager {
     static Logger log = Logger.getLogger(SessionManager.class);
     ** Holds string containing the unique identifier assigned to this session
     private String sessionid;
     ** Holds HttpSession object
     private HttpSession session;
     ** Holds request object object - must be passed in by the calling application
     private HttpServletRequest request;
     ** Holds response object - any application sending a response must call
     ** session manager
     private HttpServletResponse response;
     ** Holds Servlet Context - useful if logging is reqd.
     private ServletContext context;
      * Page context.
     private PageContext pctx = null;
     ** Constructor to initialize with a request object
     public SessionManager(HttpServletRequest req) {
          request = req;
          session = req.getSession();
          sessionid = session.getId();
     ** Constructor to initialize with a pagecontext object - convenient to call from jsp's
     public SessionManager(PageContext pctx) {
          request = (HttpServletRequest) pctx.getRequest();
          response = (HttpServletResponse) pctx.getResponse();
          context = pctx.getServletContext();
          session = pctx.getSession();
          sessionid = session.getId();
          this.pctx = pctx;
     ** Constructor to initialize with request, response objects
     public SessionManager(HttpServletRequest req, HttpServletResponse resp) {
          request = req;
          response = resp;
          session = req.getSession();
          sessionid = session.getId();
     ** Constructor to initialize with request, servletcontext objects
     public SessionManager(HttpServletRequest req, ServletContext ctx) {
          request = req;
          context = ctx;
          session = req.getSession();
          sessionid = session.getId();
     ** Constructor to initialize with request, response and context objects
     public SessionManager(HttpServletRequest req, HttpServletResponse resp, ServletContext ctx) {
          request = req;
          response = resp;
          context = ctx;
          session = req.getSession();
          sessionid = session.getId();
     ** Setter and getter methods
     public void setRequest(HttpServletRequest req) {
          request = req;
          session = req.getSession();
          sessionid = session.getId();
     ** Setter and getter methods
     public void setContext(ServletContext ctx) {
          context = ctx;
     ** Setter and getter methods
     public ServletContext getContext() {
          return context;
     public void createLoginSession(java.io.Serializable obj) {
          if (obj == null)
               log.debug("Object is null");
          setAttribute("user", obj);
     public void setAttribute(String key, java.io.Serializable obj) {
          session.setAttribute(key, obj);
     public void removeAttribute(String key) {
          session.removeAttribute(key);
     ** Setter and getter methods
     public HttpServletRequest getRequest() {
          return request;
     ** Setter and getter methods
     public HttpServletResponse getResponse() {
          return response;
     ** Checks if either member session or guest session exists
     public boolean isLoggedIn() {
          if (session.getAttribute("user") != null)
               return true;
          else
               return false;
     public long getCreationTime() {
          return session.getCreationTime();
     ** Setter and getter methods
     public String getId() {
          return session.getId();
     public long getLastAccessedTime() {
          return session.getLastAccessedTime();
     public int getMaxInactiveInterval() {
          return session.getMaxInactiveInterval();
     ** Setter and getter methods - also useful for retrieving state object(s)
     public Object getAttribute(String name) {
          if (session != null)
               Object sObject = session.getAttribute(name);
               //Log.debug("Session State for the object "+name+" is "+sObject);
               return sObject;
          else
               return null;
     ** Setter and getter methods - gets enum of all stored state objects
     public Enumeration getAttributeNames() {
          return session.getAttributeNames();
     public void invalidate() {
          session.invalidate();
          // Remove all object that is bound to this session
          //wip : Resetting instance variable.
          //This is necesary as further operations on session will
          //result in illegalstateexception
          session = null;
     public boolean isNew() {
          return session.isNew();
     public void setMaxInactiveInterval(int interval) {
          session.setMaxInactiveInterval(interval);
      * This method returns the host url in the form "www.carclub.com".
      * <p>
      * The return value is compatible with default_website field of clubs DB table.
      * </p>
      * @return host url present as part of the http request object
     public String getHostURL()
          if (request == null)
               return null;//No request object present, hence return null
          String str = request.getServerName();
          //Log.debug("--- The request URL is --- " + str);
          return str;
      * Flushes <code>out</code> stream.
     public void flush()
          throws IOException
          if (pctx != null)
               pctx.getOut().flush();
}

How to Handle user Session in JSP

Help me,
How to handle user session in JSP.......

Prakash_Pune wrote:
tell me some Debugging tech. so i can overcome from my problem.....Do you use an IDE? Any IDE ships with a decent debugger where in you can just execute the code step by step, explore the current variable values and check what exactly is happening. For example Eclipse or IntelliJ. If you don´t use an IDE, then just place some System.out.println() or Logger.debug() statements at strategic locations printing the variables of relevance so that you can track in logs what exactly is happening.
or tell any other way to find is my page is thread safe or not...Just write correct code and narrow the scope of the variables as much as possible. If you for example assigned the user object to a static variable or as a servlet´s instance variable, then exactly the same user object would be used everywhere in the application. That kind of logical things.

Sharing data between two separate user sessions

Hi all!
I have been trawling my brain for a solution to this - any help will be appreciated!
I would like to create a single instance of a class but share that instance over more than one user session (two separate users but both running concurrently).
Just as you can pass data between sessions using ABAP memory - I would like to pass data (specifically an object reference) between two separate users that could even be logged in to two separate application servers...
Even a mini Client/server solution would suffice but I cannot figure one out!
Is this possible?
Many thanks for your thoughts in advance...
N

Hello N K,
sorry thats not possible. Sharing a data item / object instance requires at least a common physical memory. As this is not guaranteed between different app. server this is technical not possible.
With release 640 ABAP offers the new feature Shared Objects. These mechanism allows access by different users and some propagation to differnt servers.There is an interesting article on the ABAP SDN homepage
https://www.sdn.sap.com/sdn/developerareas/abap.sdn
For relases below more or less the database is the only chance to store data accross application servers (known to me). One exception might be the ENQUEUES which might (mis)used to store some Flags.
Kind Regards
Klaus
Link to Shared Objects PDF
https://www.sdn.sap.com/irj/servlet/prt/portal/prtroot/com.sap.km.cm.docs/documents/a1-8-4/shared objects in abap

How to keep track of which tab is currently active in the page using Session object?

Hi,
Just curious as to whether it is possible to have a PL/SQL event fire on an active tab.
The reason is I want to keep track of which tab is currently active on the page is that I have "generic" forms and reports published as portlets that I wish to be able to determine from the session object what page/tab the user is coming from and apply certain restrictions etc.
kind regards,
Matt.
null

Hi Konstantina,
Yes You can do like that 2012-->q1-->January
Steps:
1. Create time dimension hierarchy as by following like Total--> year--> Quarter--> Month--> if you need you can keep Description.
2. Drag the Year column from period dimension table to the dimension hierarchy of year.
3. Drag the quarter column from period dimension table to the dimension hierarchy of Quarter.
4. Drag the month column from period dimension table to the dimension hierarchy of month.
5. Drag the hierarchy to period dimension table in presentation layer.
In Answer side keep as it as Default: drill in primary and secondary interaction under column properties.
For more refer : http://mkashu.blogspot.com
Regards
VG

ADF Best Practice : About user session management in ADF BC

Hi,
I'm using ADF BC and I want to manage information specific to a particular user.
In the developer's guide at §9.10 it is advised to use APIs relative to DBTransaction class through the getSession and getUserData methods.
I have several questions :
* are Session objects returned by ApplicationModuleImpl.getSession() and DBTransaction.getSession() the same ?
* is it safe to manage user information by using the map returned by the oracle.adf.share.ADFContext.getSessionScope() method ?
* finally, which is the recommended approach and what are the caveats of each ?
Thanks a lot,
Seb.

Here is the code fragment :
   * Return the jhsUser object.
   * For this method to return an object, the user object must have called setUser
   * on the application module
public Object getUser()
    Object user = ADFContext.getCurrent().getSessionScope().get(JhsUser.JHS_USER_KEY);
    if (user!=null)
      return user;
    // code below for backwards compatibility
    if (getSession()==null)
      return null;
    return getSession().getUserData().get(JhsUser.JHS_USER_KEY);
   * Stores user object as am session userdata.
   * @deprecated user is now retrieved using pull meachnism with ADFContext, instead of
   * push.
public void setUser(Object user)
    getSession().getUserData().put(JhsUser.JHS_USER_KEY, user);
}Notice the deprecated method setUser.
Seb.

Handling Session Object in WebDynpro Java

*After Validation in WebDynpro Component, if the user is not authorized to access the page, i want to close the session of that Particular login user and sent back to the login page (home page)*
i don't want to close the window
come out of the application to the login page
In Java, i can get session object by request.getSession(true);
in webDynpro how can i get the Session Object.
Thanks
NSM

Hi,
try to use the following method
WDClientUser user;
user.forceLoggedInClientUser()
Regards
Ayyapparaj

User session object

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