Servlets :: DoGet Is Launched Twice Through Annotation Calling

Oct 24, 2014

For some reasons my servlet doGet method is being called twice. I am calling servlet from the index.jsp page by using servlet annotation "/Profile/*. And it passes path as localhost:1919/Profile/username to getPost method.

<li><a href="Profile/<%=lg.getUsername()%>">Your Profile</a></li>

Servlet Profile retrieves data from the java container stores it as an attribute and forwards to profile.jsp page.

rd = request.getRequestDispatcher("/profile.jsp");
request.setAttribute("ProfileInfo", proInfo);
rd.forward(request, response);

My profile.jsp page uses java code to show all the data (and it shows it perfectly). But then I click link to the next update_profile.jsp page. Just simple link. Then I realize that on this step for strange reasons for me doGet method from Profile servlet is called the second time. And passes path as localhost:1919/Profile/update_profile.jsp

Here is my profile.jsp code:

<%@page contentType="text/html" pageEncoding="UTF-8"%>
<%@ page import="uk.ac.dundee.computing.aec.instagrim.containers.*" %>
<!DOCTYPE html>
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; charset=UTF-8">

[Code] ....

And update_profile.jsp file is just simple file with <h1>hello</h1> output. I have looked in the internet that this might be a mapping problem or my css relative path connection problem. As you see I have commented out my css connection and problem still exists. My run output in the IDE also shows these errors:

org.apache.jasper.JasperException: An exception occurred processing JSP page /profile.jsp at line 27

24: %>
25: <article>
26:
27: <h2>User: <%=proInfo.getUsername()%>
28: </h2>
29:
30: <h3>First name: <%=proInfo.getFirstname()%>

Stacktrace:
at org.apache.jasper.servlet.JspServletWrapper.handleJspException(JspServletWrapper.java:568)
at org.apache.jasper.servlet.JspServletWrapper.service(JspServletWrapper.java:470)
at org.apache.jasper.servlet.JspServlet.serviceJspFile(JspServlet.java:391)
at org.apache.jasper.servlet.JspServlet.service(JspServlet.java:335)
at javax.servlet.http.HttpServlet.service(HttpServlet.java:725)

[Code] .....

And my tomcat run configuration settings: [URL] .... and [URL] ....

View Replies


ADVERTISEMENT

Servlets :: Calling DoGet Of Child Class From Service Of Parent Class

May 28, 2014

Regarding the lifecycle of servlet , in headfirst servlet i can find :

You normally will NOT override the service() method, so the one from HttpServlet will run. The service() method figures out which HTTP method (GET, POST, etc.) is in the request, and invokes the matching doGet() or doPost() method. The doGet() and doPost() inside HttpServlet don’t do anything, so you have to override one or both. This thread dies (or is put back in a Container-managed pool) when service() completes.

How can I call the doGet method of the subclass from the superclass. i am not getting this .

View Replies View Related

Servlets :: DoGet Executes 2 Times

Jan 28, 2015

I created a new servlet to download a pdf-file from a unix-server and display it in an iFrame. The servlet gets called, downloads the pdf, throws away the session parameters and then... starts over again. The session parameters aren't there anymore and the servlet returns an error. The strangest thing is, in our development environment the thing works.

web.xml
<servlet>
<servlet-name>iframeservlet</servlet-name>
<servlet-class>Enviro.DownloadIframeContent</servlet-class>
</servlet>
<servlet-mapping>
<servlet-name>iframeservlet</servlet-name>
<url-pattern>/jsp/servlet/iframeContent.pdf</url-pattern>
</servlet-mapping>

[code]....

View Replies View Related

Servlets :: Calling JSP Page

Mar 25, 2014

I am calling a jsp page from my servlet using the requestdispatcher.forward(myjsp.jsp) method. myjsp.jsp is creating a new thread which is parallely processing along with the servlet. The issue is that the jsp page is not displayed until the servlet finishes its execution, although the new thread is created by jsp and is executing in parallel. How do we have the jsp page displayed even when the servlet is executing.

View Replies View Related

Servlets :: Calling To Download Soap Response File

Oct 2, 2014

I have a class that do a soap request to a web service , the response is containing a base64 string repressing a file content , how can i send this string to a servlet (maybe any other way) to send it to the user as a downloaded file .

View Replies View Related

EJB / EE :: Use Asynchronous Annotation In Distribute Environment

Jul 18, 2014

Can we use EJB @Asynchronous annotation in distribute environment. I know we can use it but I want to know its Advisable or not. Because It's not advisable to manage user thread in Distribute environment like EJB container .Earlier if we want to make Asyn call then we use JMS. But now they added @Asynchronous annotation with Future Class to achieve the same result.

View Replies View Related

JSP :: Translation Into Servlet DoGet / DoPost Method

Feb 26, 2014

I have the below piece of code in my jsp page.

<% double randomNum= Math.random(); %>
<%= randomNum%>

Now I am trying to run this jsp, it will be translated into servlet. When i checked the generated servlet I found both the above code snippet(scriplet and expression) came in to _jspService method. But in the internet and in many other book i found that scriplet and expression portions will come in the doGet/doPost method (which will be called from jspservice).

So any specific reason why in this case it went in to jspservice method (though I am getting desired output)? I am using tomcat 6.

View Replies View Related

JSP :: How To Map JSTL Action Form With Java Servlet By Annotation

Jul 31, 2014

I have a very simple login form. However, I keep getting http: status 404 -/login

login.jsp

<form action="/login" method="post">
<input type="text" name="username"/>
<input type="submit" name="submit"/>
</form>

[Code] ....

View Replies View Related

Annotation And Reflection Based Settings Saving System Library

Sep 12, 2014

I have been recently been working on a library to handle loading and saving settings in a Java application using annotations. Here is how the library is used currently:

package main;
import dhuk.settings.main.SettingsManager;
import dhuk.settings.main.SettingsTarget;
public class Main{
public final String keybinds = "keybinds.txt", settings = "settings.txt"; // Constant strings to be used as the file's paths
SettingsManager sm = SettingsManager.instance; // Singleton used to manage all of the settings files.

[Code] .....

Here is a link to my bitbucket repository: Click Here

View Replies View Related

Error - Class Name Only Accepted If Annotation Processing Is Explicitly Requested

Apr 20, 2014

This is my first java program.

public class Myjava
{
public static void main (string args[]) {
system.out.println("hello java world");
}
}

I am getting the below error in cmd when compiling the program with command javac Myjava

Error: class name are only accepted if annotation processing is explicitly requested.

View Replies View Related

JSP :: Forward Invokes DoPost When Manual Link Invokes DoGet

Aug 17, 2014

I have a jsp page that has a url that looks like this

<p><a href="SubscriptionController?action=subscriptionlist">Administrator Subscription Maintenance List</a></p>

Now I want to essentially slide through that page by using jsp:forward instead of the link

<jsp:forward page="/SubscriptionController?action=subscriptionlist" />

Problem is, the link invokes the doGet method of my servlet and the jsp:forward invokes the doPost. Is it possible to use jsp:forward and specify doGet somehow?

View Replies View Related

Calling Another Class

Jun 14, 2014

So heres the code for one of my classes..

import java.awt.*;
import javax.swing.*;
public class Splash extends JPanel {
public void paint (Graphics g)

[code]....

Now, when i call it from a different class in the main method, like this:

new Splash();

View Replies View Related

Calling One Jframe From Another 2

Apr 23, 2014

i am creating a desktop application. In this application, firstly there is a log in form. Now, i want to display the another form on the same window i.e by removing log in form a new form..

View Replies View Related

Calling A Function In JPA 2.1

Jul 16, 2014

Using JPA 2.1, I have been trying without luck to call a function that returns a REF CURSOR containing RECORD TYPES. Is there a way of doing this?
 
One Example of trying:

Query query = em.createNativeQuery("select my_package.my_function from dual");
Object a = query.getSingleResult();
 
I have also tried to use the StoredProcedureQuery though this does not look like it can return the functions value.
 
Produced

org.springframework.orm.jpa.JpaSystemException: No Dialect mapping for JDBC type: -10;
nested exception is org.hibernate.MappingException: No Dialect mapping for JDBC type: -10
at org.springframework.orm.jpa.vendor.HibernateJpaDialect.convertHibernateAccessException(HibernateJpaDialect.java:244)

[Code] ....

View Replies View Related

Function Calling In A Program?

Feb 12, 2015

I just wanted to ask that when we invoke a function by passing certain arguments in it ,so for instance I have certain variables like a,b and c with some values assigned to them,so when I invoke a function like func(a*b , 8, c+a) where the function func accepts parameters like func(int x,int y,int z) ,so is there any order of evaluation of expressions defined like the value of c+d would be evaluated first and then assigned to variable z ,because in C we have sequence points and since comma when acting like a separator is not a sequence point so any of the expression can be executed first ,so basically is there any sequence in which the function arguments are assigned to the parameters of the function or any relation with the stack implementation.

Even in C ,the printf starts executing its expressions from right to left so basically in why does it happen there when comma is a separator in a function argument.

View Replies View Related

Calling A Method From Main

Jan 26, 2014

The idea is to create a program to add plants and retrieve plants from a Nursery. I created a class with the properties of the plants and also there is the class an Array list to keep track of the plants entered ( they will have to be printed later) (I am not too sure if adding a public class there is the best option.

The program will allow the user to pick and action and from there the code will do something. I don't want to have all the code inside 'main' The problem is in line 114.This is what I have so far.

Java Code:

package plant.nursery;
import java.util.ArrayList;
import java.util.Scanner;
/**Class to create a plant for a nursery.
public class PlantNursery

[code]....

View Replies View Related

Calling A String To Another Method

Oct 23, 2014

I need to get the string encodedString from the method encode able to be used in the decode method.

Java Code:

public String encode(String plainText) {
int prepareString;
int shiftChar;
String preparedString2 = prepareString(plainText);
String encodedString = "";
for(int c = 0 ; c < preparedString2.length();c++)

[Code] ....

View Replies View Related

Calling A Method With Timeout

Aug 8, 2014

I have a line code like this one:

String result = someHeavyMethod();

and I need to add this logic: "if the method doesn't finish within 10 seconds, cancel it and let me continue with the rest of the program".

View Replies View Related

Calling Method Into Applet

Apr 8, 2014

I need to create an applet that displays a grid of command buttons which I have done. I then need to create a new class that draws a silly picture of an alien, which I have also done. Where I am completely stuck and confused, is that I do not know how to get the drawing into the applet. My code is below. I really do not fully understand why this is not working or how to get it working.

import java.applet.*;
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
public class MartianGame extends JApplet implements ActionListener {
DrawMartian aMartian = new DrawMartian();
DrawJupiterian aJupiterian = new DrawJupiterian();

[Code] .....

View Replies View Related

Calling Classes Within Main

Apr 17, 2014

How do I call a class within the main. For example, this is what i have in my code right now. I am trying to call the class BlackJackGame.

package blackjack
public class BlackJack {
public BlackJack() {
BlackJackGame();
}
}

View Replies View Related

JVM Crashes When Calling JNI Library

Jan 8, 2015

The following error occurs when calling the JNI library . Also i attached the log file .

#
# An unexpected error has been detected by Java Runtime Environment:
#
# Internal Error (0xb), pid=855638038, tid=4
#
# Java VM: Java HotSpot(TM) Server VM (1.6.0.00 svcnedccadmin:01.23.09-18:04 IA6
4 mixed mode)
# Problematic frame:
# C 7e1809e0

#
Abort(coredump)
*** Error code 9

Stop.

View Replies View Related

Calling Method From Within A Class

Sep 15, 2014

I am calling a method from within a class like so:

xmlWriter.updateFile(environment, doc);

The class is xmlWriter & the method is updateFile

updateFile passes Environment environment (another class) and Document doc (document builder)

but I am unsure about it passing these through the parameters in the method call..is it correct?

Also underneath that method call for the update could I then do another method call for the export method of the file?

View Replies View Related

Function Not Calling In ActionListener

Jun 21, 2014

In my given below code..in Action listener #Report function does not calling.

Java Code:

import java.awt.Color;
import java.awt.Container;
import java.awt.Font;
import java.awt.GridLayout;
import java.awt.event.ActionEvent;

[Code] ....

View Replies View Related

Calling Methods From Interface

Jul 26, 2014

I'm working with Libgdx but I have a basic java question. I'm trying to access the overridden methods from and interface in another class via a call but I'm not sure how. This is what I've got so far :

Java Code:

public interface Controller {
public void show ();
}
public class MainActivity extends AndroidApplication implements Controller {
@Override
public void showAd(boolean show) {
System.out.println("TEST");

[Code] ....

Right now this code returns a null pointer at the call.

View Replies View Related

Calling A Method From Another Class

Mar 24, 2014

I am having problem to call a method from another class using arrays. I already know how to call a method without using arrays but I am not sure how to pass parameters to the main method using arrays. I'd really appreciate any feedback or comments!This is what I have so far.

public class Customer123 {
public static void main(String [] args){
Scanner input = new Scanner(System.in);
int x;
System.out.print("Total number of customers: ");
x = input.nextInt();

[code]....

View Replies View Related

Calling A Method To Main

Nov 17, 2014

I'm trying to call a method to my main method, but I can't seem to get it to work and it keeps resulting in a compile error.

import java.io.*;
import java.awt.Point;
import java.text.DecimalFormat;
import java.util.Random;
public class Chase {
public static void main(String args[]){

[Code] .....

View Replies View Related







Copyrights 2005-15 www.BigResource.com, All rights reserved