Facade pattern - Structural

• Make a complex system simpler by providing a unified or general interface, which is a higher layer to these subsystems.

Where to use ?

• Want to reduce complexities of a system.
• Decouple subsystems , reduce its dependency, and improve portability.
• Make an entry point to your subsystems.
• Minimize the communication and dependency between subsystems.
• Security and performance consideration.
• Shield clients from subsystem components.
• Simplify generosity to specification