etl design patterns

Bridge)The bridge mode is used to solve the problem of multi-dimensional changes of the system. It separates the abstract part from the implementation part so that they can all change independently. (See the understanding of the Bridge Mode)Structure:Examples in life: Composite) Intent:Combine objects into a tree structure to represent the "part-whole" hierarchy. The composite mode ensures consistency between the use of a single object and a composite object. [Gof

Looking at "C + + Design new thinking", found in the beginning of a large length of the introduction of the Strategy Model (policy), the strategy model is not a classic design pattern, but in fact, in our day-to-day development is essential. Policy, strategy, policy, the meaning here is that the complex function of the class as far as possible to split into a single function of a simple class combination, s

A learning journey based on design patterns -----Appearance Mode 1, Initial appearance Mode Stock:EachInvestors directly purchase various types of stocks (common) Fund: Investors deal with experts to allow expertsAgree to selectStock to be purchased (appearance) 2, What is appearance mode? Provides a consistent interface for a group of interfaces in the subsystem,F A C A D EMode defines a hi

A learning journey based on design patterns ----- Observer Mode 1, Initial observer Mode In a time when the network was not so developed, many people wanted to know that the weather forecast for the next day had to watch live TV at the specified time, but sometimes they wanted to watch the weather and found that live TV had passed. This is really an unpleasant thing. Based on this situation, M

The appearance pattern of design patterns in Python advocates less coupling with multiple modules for code management, and is illustrated with examples below. Application Features: When many complex and small functions need to invoke requirements, and these calls often have a certain relevance, that is, a call is a series of. Structural characteristics: The original complex and numerous calls, planning uni

like this, it is indeed too complicated. However, the actual problems are often not so simple and there will be many additional requirements. For example, if all objects have the initialize method, you must ensure that the initialize method is called for normal initialization during object creation, for example, we may need to add additional logic judgment when creating ConcreteObjectA, etc. Different object creation and initialization processes will follow. Based on the above implementation, w

I. Overview of the pattern The Strategy mode (strategy pattern) is similar in shape to the state mode, but somewhat different in intent. The intention is to make these algorithms interchangeable and provide a way to select the most appropriate algorithm. In my application of OOP design process Evolution (iii) This article applies to the Strategy model, in the book's rent calculation on a variety of situations, each type of book rental is not the sam

relatively single; when we find that a class takes on too many tasks, Too miscellaneous should assign some responsibilities to other classes, so as to guarantee the high cohesion of the design scheme Controller mode: The controller mode requires that the coordinate processing system messages be assigned to different control classes Polymorphism: When a duty behaves differently in different derived classes, we can use polymorphic

Read the catalogue: 1. Introduction 2. Simply understand the reason (the previous issue of this article) 3.DomainModel Extensibility (Design model change points using design patterns) 3.1. Model Extensibility 3.2. The use of design patterns

What is the design pattern?Design patterns are a set of reusable, most known, categorized purposes, code design experience Summary. Design patterns are used to reuse code, make code easier for others to understand, and ensure code

Public key system and distributed environment requirements Vision Wang) 2009-02-10 Summary As a continuation of the first version of "Design Patterns-engineering implementation and expansion based on C #", we plan to launch the security design patterns series and integration pattern series) data pattern, data acce

The 23 design Patterns in Gof design patterns can be divided into three groups: Creation (creational), structural (Structural), behavioral (behavioral). Below to do a detailed analysis.Create typeCreate pattern processing object constructs and references. They abstracted the instantiation responsibility of the object i

Differentiate what is architecture, framework, pattern, and platform, and always feel that these words are too abstract and vague, today we all say what is the architecture, framework, pattern and platform. Some of the individual definitions and distinctions collected from the Web are as follows: Design Patterns 1. Design mode Why should we say

Design patterns are one of the best ways to share design ideas. Design patterns provide software architects and designers with the tools or languages they need to solve recurring problems in a systematic way to gain some experience. This series includes two sections that dis

Design principles (7 types): There are so many principles that guide us in the design and development of our programs because there is an unknown change in our program. In order to embrace this unknown change at the lowest cost, our predecessors summed up so many principles. ① Yagni PrinciplesYou aren ' t gonna need itDo not write code that you do not need②kiss PrinciplesKeep it simple and stupidCode keepin

This article is for translating articlesOriginal address: Design Patterns in PHPIf you intend to learn PHP children's shoes can refer to the author's programming language learning Knowledge system Essentials ListThis article mainly discusses in the web development, is accurate, is the PHP development the related design pattern and the application. Experienced dev

Ref http://industriallogic.com/papers/learning.html#STUDY Design Patterns navigation LFactory methodSession 1 BeginFactory method. This pattern is used by a number of patterns in the book and throughout the patterns literature. UStrategySession 2 StrategyIs used frequently throughout the book, and an

Released on: 2007.3.21 by anytao 2007 indicate the source of anytao.com. This article introduces the following: • Design Pattern) This article involves the following technologies: Object-oriented and Design Patterns Introduction The design pattern is a collection of object-oriented ideas. In its cl

Intermittent, "Android source code design mode analysis" also read, the book mentions a lot of design patterns, but some in the development of the odds are very small, so can not master nor too much influence. I think the maximum value of this book is two points, one is from the point of view of design mode to unde

There are 24 design patterns mentioned in the "Dahua Design Model": Simple Factory mode, strategy mode, decoration mode, Agent mode, factory method mode, prototype mode, template method mode, appearance mode, builder mode, observer mode, abstract Factory mode, state mode, adapter mode, Memo mode, combination mode, iterator mode, single case mode, bridging mode, c