Deepak Vohra

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 be migrated to WebLogic with MySQL as the database. Preliminary Setup Download and install the BEA WebLogic server (www.bea.com/framework.jsp?CNT=overview.htm &FP=/content/products/weblogic/server). Create a server domain. Download the MySQL JDBC driver JAR file (www.mysql.com/products/conn... (more)

Installing a Guest Operating System on a Virtual Machine

Virtualization has been widely accepted as a technique to conserve resources. Virtualization is the process of running a guest operating system on a virtual machine, which is created in a virtualizer running on the host operating system. Large companies do not have to install 100 different host computers for its employees as they may create 100 different virtual machines running different guest operating systems on a single host computer. VMware is one of the main vendors of Linux virtualization solutions. VMware Player may be used to run 32-bit and 64-bit Linux operating systems ... (more)

SimpleType and ComplexType in a Schema

This tutorial discusses the simpleType and complexType XML Schema structures and their corresponding representations in an XML document. XML Schema is used as the basis of an XML document structure, and some of the XML technologies, such as JAXB, are based on XML Schema. Overview An XML Schema is an XML-based representation of the structure of an XML document. XML Schema supports data types and namespaces; a DTD does not. In this tutorial, the simpleType and complexType structures used to represent a XML document will be discussed. SimpleType Declaration SimpleTypes are custom da... (more)

How to Create a Directory Service Using the OpenLDAP Directory Server

A directory service is an application(s) that stores, retrieves, and modifies information about network resources such as network users. The actual data is stored in a database; a database service is an abstract layer on top of the database. The Lightweight Directory Access Protocol (LDAP) is a lightweight protocol for accessing directory services. LDAP is based on entries; an entry is a set of attributes identified by a globally unique Distinguished Name (DN). Each of a directory entry's attributes has a type and one or more values. The attributes in a directory entry's distingu... (more)

Integrated Support for XML Data Management

XML is increasingly being used as the language of data exchange. An XML document based on a DTD or a XML Schema contains data that conforms to a standard structure. A number of technologies, such as ebXML (Electronic Business XML), UDDI (Universal Description, Discovery, and Integration), and RDF (Resource Description Framework) are based on XML. New business concepts, such as B2C and B2B, e-services, commerce resource platform, peer-to-peer commerce and collaborative commerce, have emerged as a result of XML. In this article, XML data management in Adaptive Server Enterprise 12.... (more)