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Ajay Vohra

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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 distinguished name(DN) are arranged in a hierarchy from right to left with the rightmost attribute as the top entry and with the leftmost attribute(s) that are unique to its level called a Relative Distinguished Name (RDN). A DN is a sequence of RDNs. Some examples of attribute types are discussed i... (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)

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)

WebLogic Tutorial: "Integrating Apache Poi in WebLogic Server"

The Apache Jakarta POI project provides components for the access and generation of Excel documents. The POI HSSF API is used to generate Excel Workbooks and to add Excel spreadsheets to a workbook. An Excel spreadsheet consists of rows and cells. The layout and fonts of a spreadsheet are also set with the POI HSSF API. A database table is often required to be presented in an Excel spreadsheet. Also, a developer's requirement could be to store an Excel spreadsheet in a database table. The Apache POI HSSF project is an API to create an Excel spreadsheet. The data in the Excel spr... (more)

JDJ Feature — Java API for XML Web Services (JAX-WS)

WebLogic Server 10 Technology Preview supports JEE 5. A feature of JEE 5 is the Java API for XML Web Services (JAX-WS) used to create Web Services and Web Service clients. WebLogic Server 10 provides the jwsc task to create the Web Service artifacts and the clientgen task to create the artifacts for Web Service clients. In this article we'll create an example JAX-WS 2.0 Web Service in WebLogic Server 10 Technology Preview. JAX-WS is an API to create Web applications and Web Services using the XML-based Web Services functionality. To create a Web Service first create a Service En... (more)