Enterprise Java

Understanding WebSphere eXtreme Scale and how it works

wsemg — Fri, 06 Nov 2009 13:03:03 -0500

Summary: This introductory article offers a foundation to help you gain a technical understanding of what IBM® WebSphere® eXtreme Scale is, the features it provides, and the vast benefits it offers. This primer describes the underlying principles of data in memory, partitioning, and caching, and then describes WebSphere eXtreme Scale fundamentals in these terms. Use cases are included to show how these underlying principles result in business benefits.

Introduction

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Community Discussion

WebSphere eXtreme Scale REST Data Service Technology Preview 3 now available

wsemg — Thu, 05 Nov 2009 11:24:43 -0500

The eXtreme Scale development team has just released technical preview 3 of the WebSphere eXtreme Scale REST data service. The WebSphere eXtreme Scale REST data service is an interface to eXtreme Scale which implements the ADO.NET Data Services protocol, which is essentially a REST interface to a variety of different data sources.

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Enterprise Java

IBM WebSphere Application Server V7 Java Persistence API (JPA) 2.0 Open Alpha

wsemg — Thu, 05 Nov 2009 10:38:47 -0500

IBM WebSphere Application Server V7 Java Persistence API (JPA) 2.0 Open Alpha

Object-relational persistence is a key developer requirement for many application developer scenarios. JPA is the Java EE standard for object-relational persistence and was first introduced as part of Java EE 5. As part of the Java EE 6 standards, JPA 2.0 (JSR-317) updates object-relational capabilities with important developer APIs and enhancements.
Key additions in JPA 2.0 include:

* Significant programmer productivity improvements

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Enterprise Java

How to convert Html to Image using Java

arthikbabu — Wed, 04 Nov 2009 09:16:35 -0500

Hi All,
I need to convert a GWT(Google web toolkit) UI to the image file.
Can anyone give me a suggestions to proceed?

I have googled and I found most of the thing with respect to ActiveX
controls. I am not supposed to use ActiveX.

I have looked some AWT / swing coding to convert the html page to image but i am not able to get the full website or when i try some site to convert as a image then it not rendered fully.

Thanks

Enterprise Java

static connections and connection pooling - what happens when physical connection is lost?

johach — Tue, 03 Nov 2009 19:58:24 -0500

My EJB has a method which will be running on a transaction started by a previous EJB.

This method has multiple calls to a makeValid method that needs to commit separately from the main transaction:

public class MyEJB{


	private Connnection mainConnection = null;

	private static final Connection staticConnection = (new ConnectionHelper()).getConnection();
	public MyEJB(Connection conn){

		this.mainConnection = conn;

	}
	public void myMethod(List myList){

		//...

	        for (int j = 0; j < myList.size; j++) {

			boolean valid = MyEJB.makeValid(); 

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Enterprise Java



Access huge number of records from the Database
zzzxxx — Wed, 21 Oct 2009 11:00:08 -0400
I have about 100000 records in a database table(oracle is the DB here). Its number may vary frequently depends on the updates/inserts to that database table. I have to show this table records to the user.I used paging to display records and user can walk through all pages by clicking on previous/Next links . Each page can display 100 number of records at a time. For each click do we need to go to database to fetch the records?Or is there any effcient way to handle this situtaion. 

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Enterprise Java



How to Copy the contents with line breaks from a JTable to Excel with line breaks included
chaithusworld — Fri, 16 Oct 2009 09:18:08 -0400
Hai

I have an application in which I have a JTable with line breaks(pressing Enter key while editing) included in each and every cell.I have used the code in this site to get my contents to be copied to excel(How to copy data from jtable to Excel).The problem is when I copy the contents from my JTable to Excel I am not getting the contents in same format as in my Jtable(with line breaks) to my excel that is with line breaks.Is there any way to solve my problem?
Thank You

Chaithu
Enterprise Java



Performance Perspectives... Standardizing with speed
wsemg — Wed, 14 Oct 2009 13:55:26 -0400
By Robert Wisniewski 

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Community Discussion



Executing native process inside WEB-INF
mac01021 — Mon, 12 Oct 2009 13:59:24 -0400
Grettings, all.
I am running Apache Tomcat 5 under Red Hat Linux.
Generally, I deploy web applications using Tomcat's "Manager" application, which allows one to upload a WAR file over the network and have it automatically deployed.
The specific webapp that I am trying to deploy includes some native executable programs inside its WEB-INF directory which are to be executed via system calls from a java servlet.
However, when the Tomcat Manager uploads and deploys my WAR file, it creates the native programs without assigning execute permissions to the tomcat user. 

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Tools and Methods



HTTP Status Code 500 Returned - HttpURLConnection to Connect to Web Server Cluster Nodes
dthanki — Mon, 05 Oct 2009 11:32:16 -0400
Presently, I am attempting to use the HttpURLConnection to make web server calls across multiple nodes participating in a web server cluster. I have a web application 'MyWebAppl' that is running/deployed on 'WebServerA' (Node #1) and the same web application 'MyWebAppl' that is running/deployed on 'WebServerB' (Node #2). From 'WebServerA' I am attempting to open/establish a HttpURLConnection with 'WebServerA' and 'WebServerB' which results in IOException with an HTTP Status Code of 500. 

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Core Java



servlets
javaisfun_NOT — Mon, 28 Sep 2009 13:30:03 -0400
i want to know if Tomcat 5.5 wud work with jdk 1.6 or not becoz i m reading frm the book on java for the web by budi kurniawan and i searched for the error 404

when i use the browser to run my servlet......and i followed what the solution to it was given that i had to make a package and then finally run the servlet ...........the prob still exists :-( .............

main Q :does tomcat5.5 work with jdk1.6
Tools and Methods



Free Java exPress newsletter available
gduda — Mon, 28 Sep 2009 11:01:59 -0400
Are you missing newsletters about Java as I did? If your answer is YES, I have got something for you. There is first issue of JAVA exPress available in English (http://javaexpress.pl). 

OK, it is not the first one, but the first one available in English. 

In this issue you can read about prolems in J2EE applications, Grails, Object serialization in J2ME, XStream, pre-tested commits in Team City, GMF and last, but not least aout Layering. 

JAVA exPress is published every 3 months. So stay tuned. Next issue soon. 

Happy reading!!!Tools and Methods



java.lang.IllegalStateException: strict servlet API : cannot call getWriter after getOutputStream()
puneet21 — Mon, 28 Sep 2009 02:44:07 -0400
Hi,

My servlet is as follows. It just opens a dialog on the basis of the filetype. The filetype can be html, xml, csv or pdf.  
<%@ page contentType="text/xml; charset=UTF-8"

<%

	JspHelper jspHelper = new JspHelper();
    FlexibleReportJobJspBean jspBean = new FlexibleReportJobJspBean();

    FlexibleReportJob reportBean = jspBean.getFlexReportConvBean();

    try

    {

		String reportCode = request.getParameter("reportCd"); 

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Enterprise Java



Whats new in Java Open JDK 7
srikanth.s.nair — Thu, 24 Sep 2009 05:44:02 -0400
Open JDK 7

In addition to enhanced API's JDK7 highlights 5 new feature...

    * Modularity
    * Multi-Language Support
    * New Garbage Collector
    * NIO.2 New File System API
    * Additional Swing API

Virtual Machine Level Features

Compressed 64-bit object pointers
A technique for compressing 64-bit pointers to fit into 32 bits, which decreases memory and memory bandwidth consumption and thereby improves performance

Garbage-First GC (G1)
A new garbage collector that promises to achieve lower pause times and better predictability than the current CMS collector

 

Read more ...Tools and Methods



eclipse ant jasper reports
maoqiu — Tue, 22 Sep 2009 23:58:38 -0400
hi guys... i've just started learning about jasper reports... its been a week or 2 now and i still can't get any reports generated... is there any kind soul out there with a step by step tutorial on how to generate a simple report from scratch(installing jasper reports, ants & etc using eclipse ide)?
Thanks!
Tools and Methods



solution4voip provides high quality termination
solution4biz — Wed, 16 Sep 2009 15:36:46 -0400
Tools and Methods



The ThreadLocal...Superb Article done by Brian Goetz
kk1687 — Mon, 14 Sep 2009 10:21:41 -0400
Visit this Link for those who all need to explore the concept ThreadLocal.
http://www.ibm.com/developerworks/java/library/j-threads3.html
About the Author
Brian Goetz is a software consultant and has been a professional software developer for the past 15 years. He is a Principal Consultant at Quiotix, a software development and consulting firm located in Los Altos, CA.
Enterprise Java



javax.servlet.ServletException: Exception creating bean of class
ghazaal — Fri, 11 Sep 2009 16:33:44 -0400
Hi,
 
I got the following error while running

sample struts application. I would appreciate any

help.
struts version= 1.1
  

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Community Discussion



Java WebServices Need Help
ajaxclient — Thu, 10 Sep 2009 10:33:46 -0400
Hi,
I am trying to create a web service which should have constraints on its method parameters.
For ex: testWebService() has a invoke method which accepts Object (String, int, boolean). I would like to add few constraints on the parameters so that while invoking web-service it will not allow to select other than accepted values.
in my object, the string parameter will only accept fileType txt or pdf.
Any suggestion to get this implemented is highly appreciated.
Thanks
Enterprise Java



Multithreading in Java
manjulx — Sun, 06 Sep 2009 09:00:50 -0400
Multithreading
Usually a program has logic to execute and some objects or data to modify. In a single threaded system program executes in a sequence line by line. Multithreaded system can allow multiple threads to execute a program parallel in multiple instances. If there is any part of code dealing with the object data modification, there is no guarantee that it will not be attempted any more than one thread at a time. 

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Community Discussion



Variabilizing variables
alexgoor — Wed, 02 Sep 2009 15:07:26 -0400
Hi.  I'm tyring to create a couple of data structures - for example, one is a hash containing an integer key and a linked list.  my problem is that i'd like to create an initially unknown number of those hashes and therefore i need a way to dynamically name each hash and each linked list. 

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Enterprise Java



Event Reservation Problem
prasath_arjunan — Mon, 31 Aug 2009 06:27:26 -0400
Dear Users.
I am doing a online Conference Hall booking system with JSP and MySql. I have the following problem when I (as Admin) am going to approve the some event on Same date(2009-08-29).
My application is to reserve a room by entering start time, end time and date before reserving I need to check the availability in the database.

When i'm requesting reserving by entering(selecting) startime as 17.30 and end time as 20.00 on a particular date(2009-08-29), 

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Tools and Methods



SWING
nitinise — Sat, 29 Aug 2009 03:03:21 -0400
HERE IS CODE BELOW I USED
import javax.swing.JFrame;

import java.awt.Container;

import javax.swing.JList;

import javax.swing.ListSelectionModel;

import javax.swing.JScrollPane;

import java.awt.Dimension;
public class ScrollList extends JFrame {

   final int defaultValue = 20;

   private javax.swing.JLabel jLabel1;

    private javax.swing.JLabel jLabel10;

    private javax.swing.JLabel jLabel11;

    private javax.swing.JLabel jLabel12;

    private javax.swing.JLabel jLabel13;

    private javax.swing.JLabel jLabel14;

    private javax.swing.JLabel jLabel15; 

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Community Discussion



urlrewrite filter and opensessioninview filter
icemanx23 — Fri, 28 Aug 2009 13:48:43 -0400
I'm using urlrewrite to change my urls from /saveSomething.htm?month=3.. to /saveSomething/month/3 and at the same time im using the filter opensessioninview for hibernate.  The problem is that after i save info or what ever and fetch data from the db and the url re written i get an error on the jsp stating that the hibernate session is closed.  If I just use a parameter based url everything works fine.  Any one have any ideas?
Enterprise Java



JMS client running in Tomcat
nbsubbaiah — Thu, 27 Aug 2009 01:30:07 -0400
Hi, 
I would like to know how a web application running in Tomcat container can consume a message from a remote destination created using JBossMQ in JBoss. 
Could you give the details ASAP? 
If you refer me to see the docs of JBoss, can you also give the particulars of these docs where to find out? 
Regards,

NBSubbaiah.
Enterprise Java