设计模式

在软件工程中，设计模式（design pattern）是对软件设计中普遍存在（反复出现）的各种问题，所提出的解决方案。

https://en.wikipedia.org/wiki/Software_design_pattern

设计模式分类

• 创建型模式：创建对象的同时隐藏创建逻辑的方式
  • 工厂模式（Factory）、单例模式（Singleton）等
• 结构型模式：关注类和对象的组合
  • 适配器模式（Adapter）、装饰器模式（Decorator）等
• 行为型模式：关注对象之间的通信
  • 命令模式（Command）、策略模式（Strategy）、响应者模式（Reactor）等

工厂(方法)模式

https://refactoringguru.cn/design-patterns/factory-method

Reactor pattern

The reactor design pattern is an event handling pattern for handling service requests delivered concurrently to a service handler by one or more inputs. The service handler then demultiplexes the incoming requests and dispatches them synchronously to the associated request handlers.

https://en.wikipedia.org/wiki/Reactor_pattern

源自

An Object Behavioral Pattern for
Demultiplexing and Dispatching Handles for Synchronous Events

by Douglas C. Schmidt

http://www.dre.vanderbilt.edu/~schmidt/PDF/reactor-siemens.pdf

实例

A reference implementation of the Reactor Pattern with Java NIO

A typical server application, such as a web server, needs to process thousands of request concurrently. Therefore, the modern web server needs to meet the following requirements

• Handling of thousands of connections simultaneously (significant number of connections may be in idle state as well)
• Handling high latency connections

https://github.com/kasun04/nio-reactor

Reactor Pattern

Reactor pattern provides a way in which we can listen to the events (incoming connections/requests) with a synchronous demultiplexing strategy so that when an incoming event occurs, it is dispatched to a service provider (handler) that can handle this event.

如何模拟运行

扩展阅读

Scalable IO in Java

https://gee.cs.oswego.edu/dl/cpjslides/nio.pdf

Reactor 基础款

Reactor 时尚款

Reactor 豪华款