Interpreter design pattern

You can see a sample implementation of the interpreter design pattern.it’s possible smilliar to each other definitions for interpreter in internet literature.

  •  interpreter pattern is a design pattern that specifies how to evaluate sentences in a language
  • Given a language, define a representation for its grammar along with an interpreter that uses the representation to interpret sentences in the language.
  • Map a domain to a language, the language to a grammar, and the grammar to a hierarchical object-oriented design

Sample scenarios for this pattern

  • read barcode
  • roman numbers converting numbers   –   (X == 10)
  • Total ASCII values ​​of the characters  – (A == 65)
  • reading result operations with mathematical and logical operators (10*5-3==47)
  • analysis of the encrypted text

Now let’s take a look our sample codes and diagram

ClassDiagram1

Main classes

example of use:

see you blog post

also get clone using VisualStudio 2012 with git source control in the bitbucket repository.You can see repository address and git address in the below

Repository : https://bitbucket.org/yemrekeskin/interpreter.designpattern

Git : https://yemrekeskin@bitbucket.org/yemrekeskin/interpreter.designpattern.git to get clone repository

Visio Drawing : Service Designing

Everything is diagram.You see enterprise system with a wide perspective and know better.you can also easily manage these enterprise projects. I came across a interesting article in association with diagrams.You can available this article via 100 Diagrams That Changed the World

Now Let’s take a look my visio drawings about services :D

Diagram : 0

Each web or windows service application (service provider application) can consist of multiple service.

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Diagram : 1

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Diagram : 2.1

Enterprise Applications have multiple application server an this is mostly three.Each application server come true  also spesific tasks of application services an tools. For instance; Web Services in a app server,Windows services in other app server, pdf builder directory in other app server or Report Services in another app server and so on.

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Diagram : 2.2

App Servers’ specific task is significant and whole system may be affected from these tasks’ errors

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Diagram : 2.3

Therefore you should install all tool and services related enterprise application for each app server.You just switch on/off mode.

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have a good codeday :D

Chain of Responsibility design pattern

Let’s explain the pattern step by step ;

  • The chain-of-responsibility pattern is a design pattern consisting of a source of command objects and a series of processing objects.This design pattern is situated insi behavioral patterns.
  • Avoid coupling the sender of a request to its receiver by giving more than one object a chance to handle the request. Chain the receiving objects and pass the request along the chain until an object handles it.
  • Launch-and-leave requests with a single processing pipeline that contains many possible handlers.
  • An object-oriented linked list with recursive traversal.

Minimal Example 

UML Diagram :

chain

Code Snippet:

Loan Example with generic

Class diagram

Capture_ChainOfResponsibility

Code Snippet:

have a good codeday :D

Observer Design Pattern in C#

The observer pattern is a Gang of Four design pattern and one of the most interesting patterns in design pattern. this pattern listed under Behavioral Patterns.

Definition

Define a one-to-many dependency between objects so that when one object changes state, all its dependents are notified and updated automatically.This pattern suitable push-based notifications.

you can watch youtube video related observer design pattern’s logic.I recommend this.

and you can find a great technical post via codeproject.In this post you’ll see example blog subscriber with observer pattern.I made three example for this.

1- Classic sample via gist (ObserverDesignPattern.cs)

2 – Sample with event and delegete via gist (ObserverPatternWithEventAndDelegate.cs)

3 – Sample with generic via gist (ObserverPatternWithNetFramework.cs)

you can examine implementation observer pattern with generic structure

have a good codeday :D

Strategy Design Pattern (example for payment types)

Hi everyone,

We continue to studies about design patterns.I want to illustrate strategy design patern in this post.I implemented a sample scenario related accounting and tranfer operations of payment types for this and coded.Also ı coded  classcic sample scenario(SalaryCalc for different Staffs,PermitDayCalc for different Staff and department) of strategy pattern.you can see this sample via my gist

Our scenario’s class diagram

Capture_StrategyDesignPattern

You can see th following code snippet

implementation to strategy design pattern

using pattern

Capture_patternStartegy

have a good day

EF Codefirst with Design Patterns

I frequently use codefirst approach of  Entity Framework in my asp.net mvc projects. Thefore I want to do much more flexible,independency using design patterns and that project is output.

Briefly;

Factory Pattern : ContextFactory

Singleton Pattern : ContextFactory and UnitOfWork

UnitOfWork Pattern 

Repository Pattern :  Generic Repository

Decorator Pattern : RepositoryDecoratorBase – CachableRepositoryLoggableRepositoryAuditableRepository

Dependency Injection : Ninject Container as IoC

Used Structure : Object Caching,Logging with Log4net, Advanced Object Orinted Principles

you can download via my github repo