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Live Blog - Day 1 Pluralsight BizTalk Course - Intro to WCF for BizTalk Developers

Blogger : BizTalk Blogs
All posts : All posts by BizTalk Blogs
Category : WSCF/WCF
Blogged date : 2008 Aug 04
  • What is WCF?
    • Again, Microsoft's next way of distributed dev technology
    • "open up your mind" - not just WS-* - universal framework to communicate with anything
    • Reminiscing about DCOM :) ah, DCOMCONFIG
    • If (DeveloperTask==Communication && OS==Windows) - love it!
    • Stack extremely pluggable
  • WCF Channels
    • WCF communicates using a set if objects that work together in a cooperative manner to implement a particular communication requirement
    • Objects are referred to generally as "Channels"
    • A set of Channel objects is known as a "Channel Stack"
    • Infrastructure exactly identical on client and server (not ASMX)
  • Channel Stack
    • Transport Channel
      • One of these
      • Listens for new messages or sends messages
      • Active (MSMQ) listeners and passive (HTTP)
    • Encoder
      • One of these
      • Turns network
    • Wire or Protocol Channels
  • Channel Managers
    • Channel stack instances are created by Channel Managers
    • Channel Manager type determines the direction of communication
    • Two types
      • Channel Listener
      • Channel Factory
  • Messages
    • Message are based on SOAP Envelope/Header design
    • Created by the Message Encoder
    • Messages are modeled as XML Infoset
  • Endpoint
    • Represents a actually physical point for communication
    • Made up of Address, Binding, Contract (ABC's of Indigo)
    • Sender (client) has one outgoing
      • Client process can have multiple senders
      • Receiver (service) can have many
  • Address
    • Specifies the physical address
    • Used by the transport channel
      • Scheme dictated by transport type
      • Encapsulated by the Uri class
      • Generally in config
  • Binding
    • Object that represents the channel stack to use for a particular endpoint
      • Often exposes properties which change the properties of one ir more of the channels and/or the encoder
    • A Binding is really just configuration
      • Binding is used to create the Channel Stack and then is ignored
      • Can be declared via code or in an config file
    • A Binding is a Binding is a Binding
      • OOB Bindings preconfigured for common scenarios
      • OOB Bindings never meant to be exhaustive
      • Binding system is totally OPEN (CustomBinding or new Binding type allowed)
  • OOB Bindings - discussion of them
  • Example of configuring binding in config
  • Contracts
    • ServiceContract
      • Applied to .NET type def (generally an interface)
      • Defines PortType in WSDL
    • OperationContract
      • Applies to interface method
      • Defines the operation on PortType
  • Demo - Writing WCF HelloWorld
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