eai design patterns

9th: Common Design Patterns 9.1 aggregation componentsConsider providing aggregation components for commonly used attribute domains.The aggregation component is used to model the concept of a high-level (physical object), rather than to model the system-level tasks.To make the name of the aggregation component correspond to well-known system entities, such as MessageQueue, Process, or EventLog, you can make

Architectural Design Source: Scenario Analysis of design patterns (1) publish-subscribe Author: poechant Blog: blog.csdn.net/poechant Email: zhongchao.ustc@gmail.com Date: February 24Th, 2012 I have read only the original English (or photocopy) books and some documents on the Internet in terms of design

: This article mainly introduces the delegated design mode of common PHP design patterns. For more information about PHP tutorials, see. Mode definition Delegation is a method to extend and reuse the functions of a class. The method is to write an additional class to provide additional functions, and use the original class instance to provide the original funct

If the classes are tightly coupled, it is difficult to reuse them separately because they depend on each other. Therefore, a single block system is generated. You cannot modify or remove a single class unless you understand the internal relationship or involve many classes. Dense mass of the entire system are hard to learn, transplant, and maintain. Loose coupling enhances the possibility of reusing a single class and the entire system is easy to understand, transplant, modify

Design patterns are specific solution patterns (routines) that can be reused for specific problems in a specific situation that is constantly emerging. According to the three categories of creation, structure and behavior, this paper summarizes the main points of use of 24 kinds of design

1. four essential elements of a pattern:(1) pattern name;(2) problem;(3) solution;(4) consequences: the results and trade-offs of applying the pattern. 2. One person's pattern can be another person's primitive building block. 3. The design patterns in this book are descriptions of communicating objects and classes that are customized to solve a general design p

behavior that may change and make it open. It contains three meanings: first, the interface and abstract class are used to limit the boundaries of the extension. Public methods that do not exist in the interface or abstract class are not allowed; second, the parameter type and referenced object should try to use interfaces or abstract classes instead of implementation classes. Third, the abstraction layer remains stable and cannot be modified once determined. 2) metadata (metadata) controls

Classification of plant design and design patterns: The factory model is divided into three categories in Java and mode:1) Simple Factory mode (simply Factory): not conducive to the production of products;2) Factory method mode (Factory): Also known as the polymorphism plant;3) Abstract Factory mode (abstract Factory): Also known as the toolbox, producing product

References Reference 1: http://stackoverflow.com/questions/1673841/examples-of-gof-design-patterns Reference 2: http://en.wikipedia.org/wiki/Design_pattern_ (computer_science) Reference 3: http://zh.wikipedia.org/wiki/%E8% AE %BE%E8% AE %A1%E6%A8%A1%E5%BC%8F_ (% E8 % AE % a1 % E7 % AE % 97% E6 % 9C % ba)Body You can find an overview of a lot Design

diagram for FilterInputStream:As can be seen, InputStream class is an abstract component exists, and FileInputStream is a specific component, it implements the abstract components of all interfaces, FilterInputStream class is the decorative role, It implements all interfaces of the InputStream class and holds a reference to the InputStream object instance, Bufferedinputstream is the specific adorner implementation, the role of this adorner class is to make the InputStream read data stored in me

Design patterns are not completely independent, but each other, there will be some of the same shadow, let's summarize the 24 design patterns together. Pattern Classification Portal Contrast Dimension description design principles: des