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Easy Learn Java: Programming Articles, Examples and Tips - Page 260


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Whizlabs Acquires INESystems, Maintains Lead in the J2EE Domain

Go to all tips in General Java
Whizlabs Software Pvt. Ltd., the global leader in J2EE Certification Exam Preparation, has acquired INESystems, a company that offered preparatory products in J2EE Certification domain.

This acquisition will enable Whizlabs to offer the J2EE preparation content with increased depth and richness to certification aspirants along with the existing quality and expertise that Whizlabs already offers.

With this acquisition, Whizlabs now holds all the INESystems’ content with the respective copyrights and controls the intellectual property (the specialized J2EE content) developed by INESystems.

With this enhanced wealth of resources, J2EE professionals will now have the dual advantage of Whizlabs’ vast experience and expertise in certification preparation along with INESystems’ valuable offerings. The synergy will enable professionals as well as the starters to transcend any barrier and reach pinnacle of their career in the J2EE domain.

Certification aspirants will now get the most robust simulators, prepared for J2EE, especially the SCEA and SCBCD Exam Simulators from Whizlabs. The J2EE community will now have access to best of both the forces in targeting certification exams with ease and confidence.

Whizlabs is committed to provide IT professionals with high fidelity preparation tools ensuring nothing less than success to the users. To ensure this, products are continually upgraded and content is improvised; “We are soon coming up with a new, upgraded SCEA simulator containing 9 mock exams (6 from Whizlabs and 3 from INESystems) at the same cost�?, added Jitin Narang, Certification Mentor-J2EE, Whizlabs.

About Whizlabs
Whizlabs (http://www.whizlabs.com), an ISO 9001:2000 certified company, is a leading provider of IT skill assessment and certification exam preparation tools. Whizlabs' suite of offerings include "IT Certification Exam simulators and Instructor-led, Online Trainings" for various exams by Sun, IBM, Oracle, Microsoft, BEA, Cisco, and other leading IT vendors and "IT skill Assessment Management Solution" for Corporations, Training Institutes, and Universities.

In its first 3 years of inception, Whizlabs has helped over 300,000 software professionals in realizing their dream of acquiring IT Certifications of their interest.

Whizlabs offerings have fuelled the career growth of IT professionals working in 321 Fortune 500 companies spread in 118 countries across the globe.

For more information: Whizlabs J2EE Exam Simulators




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Posted by Anonymous on Friday, October 29, 2004 (00:22:06) (2761 reads)

The On Demand Operating Environment

Go to all tips in General Java

Services communicate with each other by exchanging structured information -- messages or documents (sometimes called business objects). Their capabilities are defined by interfaces declaring messages they can produce or consume, policy annotations declaring quality of service required or provided, and choreography annotations declaring behavioral constraints that must be respected in service interactions. The actual implementation is hidden from the service requester, thus SOAs are a convenient way to achieve application integration by allowing new and existing applications to be quickly combined into new contexts.

Existing applications are "adapted" to service declarations. An adapter follows the WebSphere® Business Integrator model, for example. The adapter implements the service interface and transforms messages into operation on the existing application.

All interactions between services flow through the Enterprise Service Bus (ESB). This does not mean, however, that all interactions require network communication and XML messages. The ESB provides services with the "service" conceptual model, while allowing for optimized communication and encodings of messages. In extreme cases, the interaction between two services might bind to a local program call.

Matching of service requesters to providers can be done very early, prior to deploy time, or very late through dynamic discovery mechanisms.

SOAs require standards for the definition of services and their capabilities and interactions. The growing acceptance of XML as a standard representation of structured information and of Web services standards (often called WS-* standards) have greatly facilitated the adoption of this architectural approach. The conceptual model of SOA applies to the virtualization of both business functions and physical infrastructure. It spans the construction of applications as well as their deployment and management. Clients (users or businesses) only see a collection of business services and are interested in their quality of service, but the On Demand operating environment shields them from the details of application assembly and service delivery.

The next section explores the architecture for the On Demand operating environment and its guiding principles in more detail.


The On Demand Operating Environment is based upon the concepts of Service Oriented Architecture (SOA). SOA views every application or resource as a service implementing a specific, identifiable set of (business) functions. In addition to the business functions, services in an on demand environment might also implement management interfaces to participate in the broader configuration, operation, and monitoring of the environment. This article provides an introduction to the On Demand Operating Environment.
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Posted by Anonymous on Friday, October 29, 2004 (00:00:00) (2528 reads)

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