Download Developing Service-Oriented AJAX Applications on the by Daniel Larson PDF

By Daniel Larson

Anyone within the overview stack has written that when studying you are going to hate AJAX, WCF and SOA. that is especially true - and that i learn in simple terms 3 chapters! it really is written in a really contrite and uninteresting demeanour, and after interpreting few chapters your eyelids begin to suspend. Coming to the technical facet, he will get info from the database throgh WCF, and use complicated javascript and XSLT coding to show facts at the aspx web page. Is it now not beating the aim of n-tier structure, the place all of the enterprise good judgment might be within the company layer and the aspx web page may still easily show the information with no a lot scripting or code? To exhibit facts in a gridview you just drag the keep watch over and bind the knowledge with a couple of traces of code. yet based on the equipment defined within the e-book, you'll want to write strains after strains of scripting to reveal the knowledge. WHY? This e-book should be okay, upon getting an excellent knowing of SOA and WCF, and someway get pleasure from writing a number of strains of scripting to show facts.

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Service Orientation and Service-Based AJAX Applications Service orientation is an architectural approach that defines an application solely by its service interfaces. This approach also describes an architectural commitment to provide message-based applications that are loosely coupled, well defined, and abstracted from implementation details. The example of a service-orientated application that I describe in this chapter is built to reflect the following tenets of service-oriented software: • The boundaries between applications are explicit • Services are developed and deployed autonomously • Services expose well-defined messages 32 Part I: AJAX and WCF Part I: AJAX and WCF 33 For an AJAX application, following these tenets means that the service won't be tightly joined to a JavaScript client or to the service's use in the local Web application.

Many behaviors are possible, including behaviors you write yourself, but the behaviors we care about most enable discovery of the service and AJAX integration of the endpoint. More Information In this book we'll only look at built-in WCF behaviors, but you can create your own behaviors as well. aspx. On the service level, the serviceMetaData behavior enables the generation of WSDL and Metadata Exchange (MEX), which lets clients consume the service. This behavior, defined in serviceBehaviors, is specified as The serviceDebug element helps a developer debug the service by displaying error messages in SOAP faults, something that you will want to enable so that your AJAX client can handle exceptions.

NET runtime (for example, through extensive use of the HTTP protocol), use the Required value. NET integrated HTTP pipeline, use the NotAllowed value to be explicit. NET compatibility requirements, the default behavior is the same as specifying NotAllowed. NET compatibility through the AspNetCompatibilityRequirements attribute on the service class (not the service interface, as other WCF attributes). If you don't, the service will not be activated and will throw an exception.  Case Study: Introducing the Knowledge Base Reference Application Throughout the rest of this book, I'll use a knowledge base application to demonstrate service design principles and AJAX architecture patterns.

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