Alcatel-Lucent CDC Workshop, Coaching & Knowledge Transfer Architecture.
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Alcatel-Lucent CDCWorkshop, Coaching & Knowledge Transfer
Architecture
Layered Architecture
Layered Architecture
Multi layered application Logical separation
Data access layer
Service layer
Business layer
Presentation layer
Aspx page
Controller
Aspx page
Controller
Aspx page
Controller
Aspx page
Controller
Dispatcher
Request
Response
Request Processor
Request Handler Request Handler Request Handler Request Handler
Response
Request
Business Action
Business Action
Validator
Validator
Repository Repository Repository Repository
Database
WCF
ReEntity Framework
Layered Architecture
Multi tiered application Physical separation
Presentation Layer
ASP.NET 3.5 with AjaxToolkit Model – View – Controller Model:
System data Business logic (through the service layer)
View: Displays data to the user Asks for input
Controller: Client side logic Generates requests, and handles responses using the Dispatcher
Service Layer
Distributable Reusable Exposes business logic to clients Using Windows Communication Foundation Other communication frameworks are
possible as well
Service Layer Components
Request Processor Processes all requests, calls specific handlers and
returns results Request Handler
Handles requests, calls actions and/or validators in the business layer and returns a response
Business Layer
Business Action Perform some specific business logic
Validator Validates input
Calls the repositories to get / persist data Converts the full blown entities to flat Data
Transfer Objects
Data Access Layer
Repositories Single access point to the database Entity Framework for Object Relational
Mapping Tables are mapped Difficult database interaction using mapping
Stored Procedures Returns full blown entities
Entity Framework
ORM from Microsoft Layer on top of ADO.NET Generated model Full blow entity model Easy extendable:
Partial classes Extension methods
Technology
ASP.NET
ASP.NET used for front end Ajax used for interactive web pages Only default ASP.NET controls and custom
controls No 3rd party
C#
All code written in C# 3.5 SP1 Project done with Visual Studio 2008
WCF
Windows Communication Foundation for service communication
Used HTTP binding
Core Ideas
Level Of Abstraction
Enables Loosely Coupled code Communicating through interfaces or base
classes makes it possible to modify behavior without changing client code.
Increases testability Enables Dynamic Aspect Oriented
Programming
Separation Of Concerns
Each class does one thing, and only one thing A class should have only one reason to change Behavior should overlap as little as possible
Hands On!
Contact
Item SolutionsPlantin en Moretuslei 1552140 Borgerhout +32 3 236 64 03 [email protected]
SpeakerKristof Rennen [email protected]
