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CHAPTER 2 ■ INTRODUCING WCF BASICS 43ramrameshreddy.blog.commore clients requiring the same business logic encapsulated in the service with different technicalcapabilities.WCF ServiceFigure 2-8. One service with multiple endpointsIntegration TechnologiesEndpoint 1Endpoint 2In addition to extending the functionality of the .NET Framework and Visual Studio 2005, youcan use WCF with BizTalk Server to provide both brokered and unbrokered application-toapplicationcommunication. Actually, BizTalk Server and WCF are complementary to eachother. BizTalk Server provides business process orchestration, message transformation, businessactivity monitoring, and more, through designers and visual tools. WCF provides aunified framework for building secure and reliable transacted services. BizTalk Server is a keytechnology in and is responsible for orchestrating WCF services. In future versions of BizTalkServer, the orchestration process will use workflow foundation. BizTalk Server provides a WCFadapter that enables WFC services to be incorporated into business process orchestration. Infuture versions of BizTalk Server, the integration between these technologies will be even moreseamless, with WCF providing the core messaging and web service capabilities of BizTalkServer and with WCF integrated in the native protocol of BizTalk Server.ramrameshreddyramrameshreddyHTTPTransactionSupportHTTPTransactionSupport
amrameshreddy.blog.com44 CHAPTER 2 ■ INTRODUCING WCF BASICSramrameshreddy.blog.comUnifying Distributed TechnologiesMany of the features in WCF have their deep roots in a number of technologies such as ASMX,Enterprise Services, .NET Remoting, MSMQ, and WSE. Though this book won’t cover all thesetechnologies, it’s always good to take a sneak peek at each of these to get a better understandingof WCF.ASMXA web service is a component on the Web that is accessible through open standards such asSOAP and HTTP. Accessing a remote component is not a new concept. It was previously accomplishedthrough RMI, CORBA, and DCOM. But these distributed components are based onproprietary standards or protocols. Earlier distributed technologies had two main problems:• Interoperability• Crossing firewallsThese proprietary standards cannot interoperate with each other because they have theirown binary standards and protocols. Additionally, they send binary messages through a nonstandardport that results in creating “holes” in corporate firewalls. Web services deviate fromall these issues by relying on web standards or protocols instead of relying on proprietary protocols.Web services are based on the notion of a service and transfer the data in messages.A web service is a class that inherits from System.Web.Services.WebService and containsthe method to be exposed with the [WebMethod] attribute over it. Listing 2-1 contains a classnamed Employee that has two public methods named Gand so onustomer and DeleteCustomer.The method name Gand so onustomer will be consumed only as web service methods becauseit has been decorated with the [WebMethod] attribute.Listing 2-1. Sample XML Web Service Classusing System;using System.Collections;using System.ComponentModel;using System.Data;using System.Diagnostics;using System.Web;using System.Web.Services;namespace Order{public class Employee : WebService{[WebMethod()]public DataSet Gand so onustomer(int CustomerID){// logic to retrieve customer}ramrameshreddyramrameshreddy
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amrameshreddy.blog.comTHE EXPERT’
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amrameshreddy.blog.comApplying Beha
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amrameshreddy.blog.comxii ■CONTEN
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amrameshreddy.blog.comxiv ■CONTEN
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amrameshreddy.blog.comxviii ■FORE
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amrameshreddy.blog.comxx ■ABOUT T
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amrameshreddy.blog.com456 ■INDEXr
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