WCF Day 1

WCF: The unified programming model for rapidly building service –oriented applications.

o   Unifies today’s distributed technology stacks.

o   Appropriate for use on – machine, cross machine and cross Internet.

o   Codified best practices for building distributed applications.

 

o   Codified Interoperates with applications running on other platforms.

o   Integrates with our own distributed stacks.   

 Communication between multiple server applications or services in the network

•    Must be capable to run behind firewalls

•          Some share common protocols (SOAP, WSDL), but not a common platform

•   Some share common protocols and common platform (e.g., .NET)
  Road Map:
                 1980’s:
                                Object – Oriented
  ·        Polymorphism
  ·        Encapsulation
  ·        Sub classing
  1990’s:
                 Component Based
  ·        Interfaced – Based
  ·        Dynamic Loading
  ·        Runtime Metadata
  2000’s:
                 Service – Oriented
  ·        Message – Based
  ·        Schema + Contract
  ·        Binding via Policy
  What is Service?
          Self-Contained Business function.
          Functionality exposed via a structured messaging schema.
          Not Just XML or HTTP.
  
  
  •  TCP, HTTP, Message Queues … etc. 
  • XML, SOAP, JSON, Images...etc.
  
  
  Service Orientation:
  ·        Focus :Messages sent and received
  o   Moves from a Client / Server model to a Sender/Receiver Modal.
  ·        Rich communication Patterns and functionality.
  ·        Big Win is versioning independence.
  
  
  Service Oriented Architecture:
  ·        A Set of components which can be invoked, and whose interface descriptions can be published and discovered.
   

     

Remoting & Web Services:

• NET Remoting Architecture :

 

• XML Web Services Message Flow :
   Windows Communication Foundation :
  * The Old Way of easily exposing components (ASMX):
   
  
  
  ·       The  new of easily exposing components (WCF):
  
  
   
• SOA :
  Architecture of SOA.
   
  WCF in Simple Terms: