• 开闭原则(Open-closed Principle,OCP)
• 依赖导致原则(Dependency Inversion Principle,DIP)
• 单一职责原则(Simple Responsibility Principle,SRP)
• 接口隔离原则(Interface Segregation Principle,ISP)
• 迪米特法则(Law of Demeter,LoD)
• 里氏替换原则(Liskov Substitution Principle,LSP)
• 合成复用原则(Composite/Aggregate Reuse Principle,CARP)

Allows send of messages/events between components of an application without them needing to know about each other. They only need to know about the type of the message/event being sent.

Use Data Bus pattern when

• you want your components to decide themselves which messages/events they want to receive
• you want to have many-to-many communication
• you want your components to know nothing about each other