Introduction to Ends, Contract, Address and
Bindings:
Ends.
•
End point is associate among service and Application.
•
End points have three important things.
⁻
Contract
⁻
Address
⁻
Bindings
<endpoint address="http://localhost/Design_Time_Addresses/SampleService/Service1/"
binding="basicHttpBinding“
contract="ServiceReference1.IEmpService"
name="BasicHttpBinding_IEmpService"
/>
Contract
Contract is agreement between one
or more service interfaces. You can describe parameters and return values for
the service methods.
Address
Addresses can indicate your service
location i.e.URL
Bindings
Bindings can determine how your end
point going to be accessed. i.e. you have to access your service into SOAP over
HTTP and binary over TCP. Your end point will create two bindings and support both
bindings the service interface.
Specifications of WCF
• WCF supports all
specifications.
• Which is called WS*
Specifications.
• We have some list of
specifications.
⁻
Messaging
(WS-Addressing)
⁻
Security
⁻
Reliability
⁻
Transactions
⁻
Metadata
Messaging (Ws-Addressing)
⁻
Define
some extra Additions SOAP headers.
⁻
Optimize
the transmission in MTOM (Message Transmission Optimization Mechanism).
⁻
The
Message Transmission Optimization Mechanism (MTOM) defines an optimized
transmission format for SOAP messages based on the XML-binary Optimized
Packaging (XOP) specification.
Security
⁻
WS-Security
⁻
WS-Trust
⁻
WS-Secure
Conversation
⁻
The
above security can define the authentication, data integrity and method
privacy.
Reliability
⁻
WS-Reliable
⁻
This specification to ensure end to end
communication to SOAP message back and forth at many times.
Transaction
⁻
WS-Coordination
⁻
WS-Atomic
Transaction
⁻
This
specification can enable the transaction for your SOAP Messages.
Metadata
⁻
WS-Policy
⁻
WS-Metadata
Exchange
⁻
WSDL
implements done by metadata exchange protocols.
⁻
WS-policy
provides more feature to use this service.
⁻
It’s
support other language also C++, JAVA etc..
Type of Contracts in WCF
• Service Contract
• Operation Contract
• Data Contract
Service Contract
This
attribute define which application interface will be exposed as service.
Operation Contract
The Operation
Contract dictates which methods should be exposed to the external client using
this service.
Data Contract
The Data Contract attributes
defines which type of complex data will be exchanged between the client and the
service. Determine which parameter to be
serialized.
Thanks Guys
Next post we will share about WCF bindings and SOA (Service Oriented Architecture)
