This book shows you how to write programs for the MRG Messaging component of the Red Hat Enterprise MRG distributed computing platforming using the Apache Qpid API. It also gives basic information on downloading and installing MRG Messaging. For more complete information on how to download and install MRG Messaging see the MRG Messaging Installation Guide.
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E-commerce, pay-per-use online services, user-authentication and tracking for e-learning, online gaming, contests… What do all of these applications have in common? The need for secure transfer of encrypted data between client workstations and server applications. According to a study by Gartner Consulting, the growing concern for Internet security parallels the evolution of e-business. In the earliest days of Internet development, the emphasis was on distributing content over the web and making it available to anyone. Now, as the Internet matures, clients are more concerned with ensuring that their assets, both monetary and intellectual, are protected from those who may commit fraud or abuse them. This is why more and more developers have been looking for security solutions.
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Facebook applications are programs developed to make people come close, interact, have fun with friends and others and earn money. These applications are designed to make people stay up-to-date of what is happening around, like, a user can find out when his/her favorite band is launching new album? Or, has Marks & Spencer launched its new designs?
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Sun and Amazon Web Services opened a private beta program starting on May 5, 2008. Approved beta users get access to OpenSolaris™ operating system (OS) at http://www.opensolaris.org/ on Amazon Elastic Compute Cloud (EC2). OpenSolaris on Amazon EC2 is an Amazon Web service that incorporates hardware virtualization technologies based on the Sun™ xVM software and the Xen open source community work. Information about Amazon EC2 is located at: http://aws.amazon.com/ec2
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“Web 2.0″ was originally coined by O’Reilly Media in 2004. Web 2.0 properties are perceived as harbingers of second-generation Web usage, such as interactive communities and hosted services that facilitate collaboration and sharing between users.

“Web 2.0″ is also one of the most overused and abused terms on Wall Street, sublimely crafted to reinvigorate investing in online entities that remain rooted in Web 1.0 technologies. Even though much of the machinery behind the Web remains relatively unchanged — just upgraded, versioned, and rebundled — people surfing the Web have changed. Web netizens have progressed beyond solely seeking information to embracing greater levels of interaction, even if it’s virtual. It’s not enough anymore to deliver goods as promised from an e-commerce site. Merely informing your online audience of breaking news is passé, and amusing visitors with quirky applets is seriously behind the times.
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Blogs are one of Web 2.0’s most interesting and sticky developments; they’ve changed the way users find and interact with content and brands. The online experience was changed when blogs first started becoming popular, and now they’re fast becoming an integral part of many companies’ online marketing initiatives and web presence.
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The idea behind CORBA is to model distributed resources as objects that provide a well-defined interface, and to invoke services through remote invocations (RPCs). Since the transfer syntax for sending messages to objects is strictly defined, it is possible to exchange requests and replies between processes running program written in arbitrary programming languages and hosted on arbitrary hardware and operating systems. Target addresses are represented as Interoperable Object References (IORs), which contain transport addresses as well as identifiers needed to dispatch incoming messages to implementations.
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Modern Geographical Information Systems (GIS) [1] provide a service-oriented architecture for interacting with geographical data sets and related maps. Web-based GIS systems are architected around the same principles as more general Web service systems based on SOAP [2], WSDL [3], and REST. Mirroring the World Wide Web Consortium and OASIS Web service standards-making bodies, the Open Geospatial Consortium [5] defines open standards for messages, XML data formats, and access protocols that are specific to the GIS community. In addition to OGC-based services, there are many companies (such as ESRI and AutoDesk) that provide proprietary, commercial solutions. Services from these various providers are not normally interoperable.
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