How components are interacting with each other ?

Components of the Mediator Design Pattern

Below is the communication flow between components:

A Concrete Colleague object sends a message or notification to the Concrete Mediator when it needs to communicate with another colleague.
The Concrete Mediator receives the message and determines how to coordinate the interaction between the specific Concrete Colleague objects involved.
The Concrete Mediator may then invoke methods on the Concrete Colleague objects to facilitate their communication.
Colleague objects interact indirectly through the Concrete Mediator, maintaining loose coupling and avoiding direct dependencies.

Mediator design pattern

The Mediator design pattern is a behavioral pattern that defines an object, the mediator, to centralize communication between various components or objects in a system. This promotes loose coupling by preventing direct interactions between components, instead of having them communicate through the mediator, facilitating better maintainability and flexibility in the system architecture.