Deepak Vohra

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Virtualization is the process creating a virtual version of a resource such as an operating system, network resource or storage device. Virtualization of an OS involves hosting an OS on another OS using a virtualizer such as Oracle VirtualBox. Various Linux distributions such as openSUSE, Ubuntu, and Fedora are available. In this article we'll discuss hosting openSUSE, Ubuntu, and Fedora on Oracle VirtualBox running on Windows OS. Setting the Environment Download the ISO images for the guest OS to be installed, openSUSE 12.1 Live KDE ISO, Ubuntu ISO, Fedora ISO. Download the Oracle VirtualBox exe file VirtualBox-4.1.8-Win.exe or another version from https://www.virtualbox.org/wiki/Downloads. Double-click on the exe file to start the setup wizard. Click on Next in the Oracle VirtualBox 4.1.8 Setup wizard. In Custom Setup select the features to install (the default fea... (more)

Configuring BEA WebLogic 8.1 JDBC Connectivity

This article describes the configuration of various JDBC-related features in the BEA WebLogic 8.1 Server. Although we use Oracle 8.1.7 as our example database management system (DBMS), the general concepts are easily transferable to other relational databases as long as the databases in question provide connectivity through JDBC. Introduction JDBC is a standard Java API that is used directly or indirectly by almost all J2EE applications that require database access. In BEA WebLogic 8.1, configuring JDBC connectivity consists of creating and configuring two main artifacts - JDBC ... (more)

XML Schema Binding with XMLBeans

XMLBeans is an open source XML-Java binding tool used to generate Java classes and interfaces from an XML Schema. The generated Java classes may be used to parse or generate an XML document that conforms to the Schema. Some of the advantages of XMLBeans over JAXB are the ability to parse an XML document and support for all of the XML Schema constructs; the JAXB-generated classes do not have a parse method to parse an XML document, and JAXB does not support all of the Schema constructs. XMLBeans provides the XMLObject, XMLCursor, and SchemaType APIs to parse or construct an XML d... (more)

Transforming XML-to-XML or -Text or -HTML

The Extensible Stylesheet Language Transformations (XSLT) specification provides for morphing XML documents into other XML documents. An XML document can also be transformed into a format other than XML such as HTML or text. An XSLT processor is required for an XSLT transformation. Some of the commonly used XSLT processors include Xalan-Java, Oracle XSLT Processor for Java and the JAXP XSLT transformer. A stylesheet is used to transform an XML document. The elements of a stylesheet are in the XSLT namespace http://www.w3.org/1999/XSL/Transform. With XSLT an XML document may be c... (more)

Configuring Eclipse for Remote Debugging a WebLogic Java Application

A J2EE application deployed in the WebLogic server may be debugged in the Eclipse IDE with the remote debugger provided by Eclipse. Without a debugger the error message has to be obtained from the application server error log to debug the application. With the remote debugger provided by Eclipse, exception breakpoints may be added to the application file to debug. When an application is run in WebLogic and the application generates an error, the application gets suspended and the Eclipse IDE Debug perspective displays the error. In this tutorial we will debug a WebLogic Applicat... (more)