Design patterns - Elements
A design pattern attempts to record those aspects of a recurring design in object-oriented systems that solve a problem or a class of problems.
When we inspect design patterns, we find that almost all of them have the following elements:
Name: A well-known handle or title, which is commonly used to describe the pattern. Having standard names for design patterns aids communication and increases our design vocabulary.
Context: This is the situation in which the problem arises. A context can be generic like develop a web application software, or specific like Implementing resource-change notification in a shared memory implementation of the publisher-subscriber system.
Problem: Describes the actual problem that the pattern is applied for. A problem can be described in terms of its forces, which are as follows:
Requirements: The requirements that the solution should fulfill, for example, the Publisher-subscriber pattern implementation must support HTTP.
Constraints...
