wiki:Notes/DesignPatterns

Design Patterns

Design Pattern - the thing http://en.wikipedia.org/wiki/Design_pattern
Design Patterns - the book http://en.wikipedia.org/wiki/Design_Patterns
Software Design Pattern http://en.wikipedia.org/wiki/Software_design_pattern
http://en.wikipedia.org/wiki/Category:Software_design_patterns


Patterns Catalogue http://hillside.net/index.php/patterns/patterns-catalog
Patterns Links http://hillside.net/index.php/patterns/links


Do Factory - .NET http://www.dofactory.com/net/design-patterns
OO Design http://www.oodesign.com/
Wiki Books http://en.wikibooks.org/wiki/Computer_Science_Design_Patterns
Workflow Patterns http://www.workflowpatterns.com/patterns/index.php
Java Design Pattern Stories http://www.programcreek.com/java-design-patterns-in-stories/
Source Making http://sourcemaking.com/design_patterns


Creational Design Patterns

Abstract Factory

Creates an instance of several families of classes

Builder

Separates object construction from its representation

Factory Method

Creates an instance of several derived classes

Object Pool

Avoid expensive acquisition and release of resources by recycling objects that are no longer in use

Prototype

A fully initialized instance to be copied or cloned

Singleton

A class of which only a single instance can exist

Structural Design Patterns

Adapter

Match interfaces of different classes

Bridge

Separates an object’s interface from its implementation

Composite

A tree structure of simple and composite objects

Decorator

Add responsibilities to objects dynamically

Facade

A single class that represents an entire subsystem

Flyweight

A fine-grained instance used for efficient sharing

Private Class Data

Restricts accessor/mutator access

Proxy

An object representing another object

Behavioral Design Patterns

Chain of responsibility

A way of passing a request between a chain of objects

Command

Encapsulate a command request as an object

Interpreter

A way to include language elements in a program

Iterator

Sequentially access the elements of a collection

Mediator

Defines simplified communication between classes

Memento

Capture and restore an object's internal state

Null Object

Designed to act as a default value of an object

Observer

A way of notifying change to a number of classes

State

Alter an object's behavior when its state changes

Strategy

Encapsulates an algorithm inside a class

Template Method

Defer the exact steps of an algorithm to a subclass

Visitor

Defines a new operation to a class without change

Convention Over Configuration

http://en.wikipedia.org/wiki/Convention_over_configuration

Convention over configuration (also known as coding by convention) is a software design paradigm which seeks to decrease the number of decisions that developers need to make, gaining simplicity, but not necessarily losing flexibility.

http://softwareengineering.vazexqi.com/files/pattern.html

Intent ... Design a framework so that it enforces standard naming conventions for mapping classes to resources or events. A programmer only needs to write the mapping configurations when the naming convention fails ...

As the designer of a framework, use the Convention over Configuration pattern when

there are clear and practical naming conventions that can be established between parts of the framework.

there is the opportunity to reduce the amount of configuration files that duplicate mapping information from other parts of the system.

The Convention over Configuration pattern does not preclude the need for configuration files. Configuration files are still important for the cases where convention fails. But for most cases, sticking to the conventions works and keeps things simple for the programmer and anyone reading the code.

See Ruby#RubyOnRails

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Architectural Design Pattern

http://en.wikipedia.org/wiki/Architectural_pattern

An architectural pattern is a general, reusable solution to a commonly occurring problem in software architecture within a given context. Architectural patterns are similar to software design patterns but have a broader scope ...

An architectural pattern is a concept that solves and delineates some essential cohesive elements of a software architecture. Countless different architectures may implement the same pattern and share the related characteristics. Patterns are often defined as "strictly described and commonly available".

For example, the layered architecture is a call-and-return style because it defines an overall style to interact. When it is strictly described and commonly available, it is a pattern.

ServiceOrientedArchitecture#DesignPatterns

Also See

DesignPatternsOrchestration

DesignPatternsIntegration

Messaging#MessagingPatterns

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Last modified 2 years ago Last modified on 04/17/2015 04:20:05 PM