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Deepak Vohra

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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 Endpoint Implementation (SEI) class. The implementation class is annotated with javax.jws.WebService annotation. The implementation class must not be abstract or final, and must contain a default public constructor. A Web Service provides operations that are made available to Web Service client... (more)

Hybrid Cloud Computing: The Future Trend in Cloud

Cloud computing has been a boon to conserving resources by providing a farm of servers that are concurrently used by multiple users. Cloud computing precludes the requirement for setting up per-user servers. In a recent InformationWeek survey of business technology professionals, most have indicated a preference for cloud computing for storage, archiving, and disaster recovery, for business applications, servers, raw computing power, dedicated data center space, databases, and specialized IT services such as security, management and compliance. Cloud computing may be public or ... (more)

Developing Entity EJBs

Enterprise JavaBeans (EJBs) are application components that implement the EJB architecture specification and are part of the Java 2 Enterprise Edition (J2EE) platform. EJBs are ideally suited for the development and deployment of distributed, scalable, transactional, secure, portable, component-based business applications. EJB-based business applications require an EJB container for runtime execution and all J2EE-compliant application servers, including WebLogic 8.1, provide an EJB container. The principal motivation underlying EJB architecture is separation of concerns: it sep... (more)

New Features in JavaServer Faces 2.0

JavaServer Faces (JSF) technology is used for developing server-side user interfaces (UI) for Java EE applications. JSF 2.0 architecture has introduced several new features, most of which we shall discuss in this article. The salient new features in JSF 2.0 are State Saving, Facelets, Navigation, Validations, Scopes, AJAX, Resource Handling, Composite Components, View Params, Client Behaviors, Event Handling, and Exception Handling. State Saving In JSF 1.2 the full component tree is saved/restored. Attributes are also stored and restored. Saving and restoring the full state has pe... (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)