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Deepak Vohra

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The Java Database Connectivity (JDBC) API is used to access a SQL database from a Java application. JDBC also supports tabular data sources, such as a spreadsheet. Oracle JDeveloper is a free Integrated Development Environment (IDE) for modeling, developing, debugging, optimizing, and deploying Java applications. JDeveloper 10g is used to develop J2EE applications comprising the JSPs, EJBs, struts, servlets, and Java classes that may require accessing a database table in an Oracle 10g Database or a third-party database. In this extract from the book JDBC 4.0 and Oracle JDeveloper for J2EE Development (Packt Publishing), we will see how to configure JDBC in the JDeveloper IDE. Unlike the Eclipse IDE, which requires a plug-in, JDeveloper has a built-in provision to establish a JDBC connection with a database. JDeveloper is the only Java IDE with an embedded applicatio... (more)

DTD and XML Schema Structures

This article compares Document Type Definition (DTD) and XML Schema elements. Java 2 Enterprise Edition (J2EE) developers use DTDs and schemas in J2EE/XML applications. When a DTD for an XML document is provided and validation with an XML Schema is required, the DTD-to-XML Schema conversion creates an XML Schema document corresponding to the DTD document. Overview A DTD defines the structure of an XML document and defines a document's element types, subelement types, and the order and number of each element type. It also declares the attributes, entities, notations, processing i... (more)

Migrating a JBoss EJB Application to WebLogic

The JBoss open source application server is commonly used in the development phase of a J2EE project. In the production phase the commercial BEA WebLogic server is preferred because of its enhanced set of features. Without modifications, an application developed in JBoss does not deploy in WebLogic server. The deployment descriptors for the WebLogic server are different from the JBoss deployment descriptors. An application may be migrated to WebLogic by converting the vendor-specific deployment descriptors to WebLogic. In this tutorial an EJB application developed in JBoss will ... (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)

Configuring Linux Virtualization with Oracle VirtualBox

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 Oracl... (more)