Latest posts from JavaWorld forums

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

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

* Significant programmer productivity improvements

Read more ...

Enterprise Java

cannot find file error while trying to complie a servlet

divya — Thu, 05 Nov 2009 09:45:14 -0500

I have a class in C:\workspace\test\src\com\example\web\Test.java
I am trying to compile this servlet.
my javac is at C:\Sun\SDK\jdk\bin

i set the path like this set PATH=%PATH%;C:\Sun\SDK\jdk\bin

am at C:\workspace\test

I am compiling like this
javac -classpath /tomcat/common/lib/servlet-api.jar;classes:. -d classes src/com/example/web/example/web/Test.java

and i get cannot read:Test.java error

Please help

Core Java

Radio Button

sundar4047 — Thu, 05 Nov 2009 03:26:44 -0500

Hello Sir,

How to create the code for the password recovery page(like forgot gmail password question and answer page)using the radion buttons in display the same page in jsp.I need only how to make the question and answer page using the radio buttons.please help me to solve this problem.please send the codes.
If the questinaire page, the answer is wrong then make another question(like password recovery page)and continue to end of the solution.please help anybody.

Thanking you..

Core 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

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



jar file varification
plaintext — Sat, 31 Oct 2009 00:16:46 -0400
A jar file which was signed using 1.4 javas jarsigner tool, when varified using 1.5, gives a warning that the certificates have expired. why is this ?

Warning: jar contains entries whose signer certificate has expired.
Core Java