JSP :: How To Access Session From Different Context

Apr 4, 2015

How to access session from different context? I have created a session in one jsp, in one context and trying to access it from different context. But, I was unable to access the same. How to achieve it?

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Servlets :: Can Access Session Object Even Session Is Time Out

Jun 4, 2014

Can I access the session object even session has been expired? I need to check whether session is expired or not for each request.The session invalidation is set null the session object. What I concluded, session time out I can access session object but session invalidation I can not access session object. How can I find the session time out by using session object?

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JSF :: How To Access A Method With Session Scope Via Hyperlink

Jun 3, 2014

I have a hyperlink say,

[URL]

now, i want to access a managed bean's method to execute a service call related to the code embedded in the hyperlink.

My Managed bean

@ManagedBean(name="details")
@SessionScoped
public class XXXX extends Bean implements Serializable{
public XXXX(){...... }
public myMethod(..){
service.getDataRelatedToHyperlinkCode(....passing code here to fetch details from DB)
}
}

if i use postConstruct annotation it is getting executed only once since it is a session scope. and point to be noted is i cannot use viewscope and requestscope.

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EJB / EE :: Unable To Access Session Deployed In Weblogic Server From JBOSS

Jan 13, 2009

I am currently trying to access an EJB Session deployed in a Weblogic server from JBOSS.

The client code looks like this :

Hashtable environment = new Hashtable();
environment.put(Context.INITIAL_CONTEXT_FACTORY, "weblogic.jndi.WLInitialContextFactory");
environment.put(Context.URL_PKG_PREFIXES, "weblogic.jndi.factories");
environment.put(Context.PROVIDER_URL, "t3://<ip>:<port>");
InitialContext context = new InitialContext(environment);
ServiceHome home = (ServiceHome)context.lookup("ejb/Service");

When I run this code from a standalone java program it executes ok, but when I try to run it from an application deployed in JBOSS, the line (5) which creates the InitialContext object throws this Exception :

java.lang.ThreadDeath
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1221)
org.apache.catalina.loader.WebappClassLoader.loadClass(WebappClassLoader.java:1181)
weblogic.rmi.internal.StubGenerator.getStubClass(StubGenerator.java:696)
weblogic.rmi.internal.StubGenerator.generateStub(StubGenerator.java:742)

[Code]....

In order to be able to use weblogic naming factory I put the archive weblogic-8.1.6.0.jar in jboss's /server/default/lib directory. But I think it has to do with JNDI conflicts between JBOSS and weblogic.

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JSP :: Page Directive Attribute Session False - Yet Session Created

Feb 26, 2014

May be I did not understand the meaning and usage of attribute "session" in page directive. My understanding is if session=false, in page directive, then the JSP page will not participate in the session. However, I have my welcomepage as below:

<%@ page language="java" contentType="text/html; charset=ISO-8859-1"
pageEncoding="ISO-8859-1" session="true"%>
<%@ taglib uri="http://java.sun.com/jsp/jstl/core" prefix="c" %>
........
.......
<%= session %>
<c:out value="${pageContext.request.session}"/>

if I choose session=true, then both ways of accessing session works , which means the JSP page participated in the session.

But if I change the session=false, then <%= session %> fails, but <c:out value="${pageContext.request.session}"/> does not fail.

how can c:out still show the session, when session = false

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Web Services :: Rest Session Not Getting Invalidated After Invalidating UI Session?

Dec 17, 2014

I have 2 war in 1 EAR.

War A corresponds to UI

War B corresponds to Rest

1) From War A, I login to the application and then fetch some users that is a rest call. I get the response back from rest in json form that ui consumes and display the data on page.

2) Now I click on the logout link from ui jsp. This logs out the session from Ui. I use <form data-dojo-type="dijit/form/Form" based logout.

3) I then go to the proxy (using burp) and manually request the rest call which I made in step no 1), the rest gives the response back with the same json object returned in step no 1) This shows that the logout action on step 2) is invalidated the session from War A (ui war) but the session or cookie based from WAR B (rest war) is not invalidated.

Expected outcome:After I Logout from War A(ui war), the session must also get invalidated from war B (rest war) and manually request from proxy should not get the same response object as received in step 1)

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Servlets :: Updating Session Value But Same Session In JSP Page Not Updated

Jul 8, 2014

I am developing a e-commerce college project, here i add the items in the cart(a div tag in the jsp page) via servlet by creating sessions,

flow control: shopping jsp (when user wants to add an item in the cart) --> item servlet (which is used to create session and synchronized it) --> cart servlet(which is used to add items in the arraylist and show them in the shopping.jsp's div tag + it also sets the total purchase amount in the session variable "totalpurchase")

now after that user wants to proceed to checkout, here i use the onclick event to check the minimumshopping amount must be less than the totalpurchase (totalpurchase which i had setted in the session),but my jsp page is unable to rechognise the updated value of the totalpurchase, yes, if i reload the page, it rechognises the new updated value of the totalpurchase? but i want it to rechognise the updated total purchase value, without reloading he jsp page..

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Servlets :: Context Path After Forward

Mar 23, 2015

I have normal adress which works, like

localhost/contextPath/foo

In URL rewrite filter I forward that call like

((HttpServletRequest) req).getRequestDispatcher(".....foo1.jsp").forward(req, res);

And it gets there. On that page (foo1.jsp) I have link to original href

<a href="localhost/contextPath/foo">click.</a>

When I click that, in url rewrite filter I get:

String url = ((HttpServletRequest)req).getRequestURL().toString();// http://contextPath/foo/contextPath/foo
String uri = ((HttpServletRequest)req).getRequestURI().toString();// /contextPath/foo/contextPath/foo

which is bad address. How to handle that and why it happens ?

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Servlets :: Mapping Before Context Root

Dec 1, 2014

I have this mapping:

<servlet>
<servlet-name>wsdl</servlet-name>
<jsp-file>/wsdl/bankconnect.html</jsp-file>
</servlet>
<servlet-mapping>
<servlet-name>wsdl</servlet-name>
<url-pattern>/wsdl</url-pattern>
</servlet-mapping>

And this works fine: URL....The war file is deployed under the context root /bankconnect/ I want to make a servlet mapping, before the context root "i still want the context root bankconnect". URL....

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Servlets :: Initialization With Different Scope / Context

Jan 13, 2015

I want to initialize my servlet based on the scope of my application.

For example, I have multiple admins with their respective email address.

I want to perform action within my servlet based on the given environment.

Would this be the right approach, if I set the admin email addresses in my web.xml as init-param:

<servlet>
<servlet-name>ServletName</servlet-name>
<servlet-class>com.mkyong.ServletDemo</servlet-class>
<init-param>
<param-name>admin1</param-name>

[Code] .....

Now if I am in the admin 1 environment, I would initialize my servlet with request parameter admin=1 and the servlet should load email address of admin 1 and similarly when in the environment 2, should load the servlet with admin 2.

call environment 1:
/servlet/Demo?admin=1
public void doGet(HttpServletRequest request, HttpServletResponse response)
throws IOException{

[Code] .....

I could do the same by putting the email address of the respective admin as request param value, but i don't want to the email address to appear in the url.

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How To Manage Old Requests Due To Context Path Change

Jun 12, 2014

I had to change context path name of my web application due to some organizational shuffle. I have successfully changed it and it has been working fine.

But what is happening is we have used old context path name in reminder and notification emails. so When users hit links from old emails, they are getting 404 Error.

Is there any way to redirect the old request which has old context path to new one?

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Draw Architecture / Context And Sequence Diagrams

Jan 1, 2015

I have to submit my system for a hospital management system(java) and i have been asked to draw the following diagrams

Architecture Diagram
Context Diagram
Sequence Diagram

How to draw ???

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Java Servlet :: Connection Pool And Context

Jan 23, 2013

I am working on netbeans IDE , but I understand how the application know the parametres for the connections. I understand what is a Context , specifically i understand this code about the init method

Context initCtx = new InitialContext();
Context envCtx = (Context) initCtx.lookup("java:comp/env");
servicioConexiones = (DataSource) envCtx.lookup("jdbc/bd_tutorias");

I want to know how the application knows to use these connection parameters, on the Context.xml

<?xml version="1.0" encoding="UTF-8"?>
<Context antiJARLocking="true" path="/tutorias_pag480">
<Resource auth="Container" driverClassName="com.mysql.jdbc.Driver"
maxActive="8" maxIdle="4" name="jdbc/bd_tutorias" password="mysqladmin"
type="javax.sql.DataSource" removeAbandoned="true"
url="jdbc:mysql://localhost:3306/bd_tutorias" username="root"/>
</Context>

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Fleet Of Ships - Drawing Squares In Graphic Context

Feb 20, 2014

Square:

package assignment1;
  
import java.awt.*;
public class Square
{
private double x,y; // Current position of the square.
private Color color; // The color of the square. 
private int side; // The side of the square
public Square() // constructor

[Code] .....

This is the square class, it draws an orange square that moves around in the applet viewer, works fine and as it supposed to do.

Ship:

package assignment1;
 
import java.awt.*;
 public class Ship
{
private Square[] fleetMembers; // declare fleetMembers as an array of Square
private int total = 5; // Max number of squares in fleet
private double x,y;
Ship() // Constructor

[Code] ....

This is my FleetOfShips code. It is supposed to be a set of ships moving around together, but for unknown to me reasons it doesn't work. It does compile without any problems but when I run the applet it doesn't do anything.

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Enterprise JavaBeans :: Change Default Context Of EAR File

Mar 19, 2013

I'm deploying an EAR file on weblogic 10.3.4. The EAR file contains a war file and a jar file that implements web services using EJBs.

The application deploys and is functioning correctly. The application is available from the following URLs:

web application: [URL] ....
web services: [URL] ....

However, I would like configure the deployment to insert the "app1" string into the URL so the application is available like this:

web application: [URL] ....
web services: [URL] ....

I've been looking at some of the configuration options in deployment plans, but can't seem to get anything working.

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Java Swing Popup / Context Menu Does Not Appear In Secondary Monitor

Dec 7, 2014

Main screen leftsecond screen rightswing portal application is visible on two screens. If you open a context menu (right mouse) on the right screen, the context menu open on the left (Main) screen instead of the right.

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EJB / EE :: Session Bean Must Not Extend Another Session Bean?

Nov 9, 2014

I have tried this example ([URL].../) with CarDao extending the BaseDao, it works like a charm.However, from the CarDao class, my NetBeans underlined the class name “CarDao” with the error message “A session bean must not extend another session bean.” But I can compile, deploy and run the application without any problem.

I have also heard that a session bean cannot extend another session bean, but why it works here?

I am using Java EE 6, NetBeans 8.0.1 and WebLogic 12c for this code testing.

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Non-static Variable Cannot Be Referenced From Static Context - Error

Mar 15, 2015

I am trying to call an actionListener which is shown below in my PSVM :

class testMenuItemListener implements ActionListener {
public void actionPerformed(ActionEvent arg0) {
getContentPane().removeAll();
createPanel();
getContentPane().add(panel1); //Adding to content pane, not to Frame
repaint();
printAll(getGraphics()); //Extort print all content

[Code] .....

I get the following error :

Frame.java:409: error: non-static variable this cannot be referenced from a static context
menuItem1.addActionListener(new testMenuItemListener());

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Non-static Variable Special Cannot Be Referenced From A Static Context

Mar 3, 2015

I am trying to add a field (called special) to a hibernate table. I am copying existing code (related to the NAME field) so I don't have to figure this out from scratch. I am getting the error

"[ERROR] C:VOXvoxware-1.1.13voxwarevoxware-implsrcmainjavacomvoxwareimplflowVoxFlowConfiguration.java:[213,38] error: non-static variable special cannot be referenced from a static context".

Line 213 is in public void mergeFrom, the actual line is "special = VoxFlowConfiguration.special;" I don't understand why Java thinks special is a "non-static" variable but it doesn't have a problem with the other variables (such as name, orderShow)

package com.voxware.impl.flow;
import com.voxware.asset.LiabilityType;
import com.voxware.flow.FlowConfiguration;
import com.voxware.flow.OrderFlow;
import com.voxware.flow.Step;
import com.voxware.i18n.LanguageCodes;
import com.voxware.impl.i18n.UTF8Control;
import com.voxware.impl.persistence.BaseEntity;
import com.voxware.impl.portal.VoxPortal;

[code]....

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Non-Static Method Cannot Be Called From Static Context Errors

Jul 27, 2014

I'm working on a banking program that is supposed to use 3 classes (Account-base class, CheckingAccount, and SavingsAccount) and several methods to display the banking information (ID, balance after a withdrawal and deposit, and the annual interest rate). This should be a pretty simple program, but I'm getting hung up on one portion of it. I'm getting some compiler errors, all of which deal with non-static variables being called from a static context (I'll also post these errors following the code). Up until the middle of last week, we just declared everything as static, but that's changed and I'm having trouble figuring out when to and when not to use static when declaring my methods, hence the compiler errors.

import java.util.Date;
public class Account {
private int id = 0;
private double balance = 0;
private double annualInterestRate = 0;
private Date dateCreated = new Date();

[Code] ....

Here are the compiler errors I am receiving:

Compilation completed. The following files were not compiled:
6 errors found:
File: C:UsersHiTechRedneckDesktopSummer II 2014Computer Programming PrincipleProgram 5CheckingAccount.java [line: 7]
Error: non-static method getId() cannot be referenced from a static context

[Code] .....

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Non-static Variable This Cannot Be Referenced From A Static Context - Error

Mar 14, 2015

I am trying to call an actionListener which is shown below in my PSVM :

class testMenuItemListener implements ActionListener
{
public void actionPerformed(ActionEvent arg0) {
getContentPane().removeAll();
createPanel();
getContentPane().add(panel1); //Adding to content pane, not to Frame
repaint();

[Code] .....

I get the following error :

Frame.java:409: error: non-static variable this cannot be referenced from a static context
menuItem1.addActionListener(new testMenuItemListener());

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Non-static Method Cannot Be Referenced From Static Context

Feb 1, 2015

I am trying to compile the following code where the entry point is Main.java but i am getting the following error "Error non-static method add(int[]) cannot be referenced from a static context in Java " ....

If i add the keyword static in add method of A.java it works properly......

Class Main.java code
package com.company;
public class Main {
public int [] a= new int[]{1,2,3};
public static void main(String[] args) {
Main n= new Main();

[Code]...

Both the classes are in same package

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JSF :: Updating Session Value

Apr 29, 2014

I am using JSF2 with Primefaces. Here is my business requirement-Hidden field on JSF page should take the value from the session object that is set in managed bean. Session object is updated every time when the user submits the page. I am able to update the session object in the managed bean and able to get the value in the hidden field first time and after that i see the same value in the hidden field even though session object has different value. Here is the hidden field: <h:inputHidden id="xyz" value="xyz"/> i tried using sessionScope but still didn't work.

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JSF :: Immediate Session Timeout

Jan 27, 2014

I have set the session timeout in web.xml to 60 but when I start on the home page and begin to enter any data I immediately get redirected to the timeout page.From the timeout page I can click a link that takes me to the home page. Now I get the 60 minutes before another timeout occurs. Changing the timeout only results in a change to the timeout after going back to the home page..why I am seeing an immediate timeout?

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Servlets :: How To Use Session

Apr 16, 2014

I'm trying to go back to basic and strengthen some of my foundation. I'm wondering what kind of data would be appropriate to be stored inside a session? My app is a web app where all the users are the employee of a company. So it's an web-based app that keeps track of stock movements, purchasing and sales order (standard distributor company). The web app interacts strictly with employees, so no public facing app (yes, that's right, no shopping cart). So, in this kind of web app, what kind of data that by storing it to session.

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Session Creation For Users

Apr 3, 2014

I am making a Java project using Eclipse,oracle 10g and Apache tomcat.

Now my problem is that I cant create a session for the users. I have coded on jsp pages mostly.

Session creation using HttpSession through servlets or jsp

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