There are many cases in which you may wish to retry an operation a certain number of times. Examples are database failures, network communication failures or file IO problems. Approach 1This is the traditional approach and involves a counter and a lo…
今天介绍下策略模式,直接先上UML图 策略模式的概念 The Strategy Pattern defines a family of algorithms,encapsulates each one,and makes them interchangeable. Strategy lets the algorithm vary independently from clients that use it.–(翻译)– 定义一系列的算法,把它们一个个封装起来, 并且使它们可相互替换.策略模式使得…