How do I implement the Mediator Pattern in my application?

How do I implement the Mediator Pattern in my application?

The Mediator Pattern is a behavioral design pattern that allows objects to communicate with each other without knowing about each other's internal details. To implement it, you typically create a Mediator interface and concrete Mediator class that handles the communication between different components.

Can you give me a code example of the Mediator Pattern?

Sure! Here's a simple example in Python:

class Mediator:
    def notify(self, sender, event):
        pass

class ConcreteMediator(Mediator):
    def __init__(self, component1, component2):
        self.component1 = component1
        self.component2 = component2
        self.component1.mediator = self
        self.component2.mediator = self

    def notify(self, sender, event):
        if event == "A":
            print("Mediator reacts on A and triggers:")
            self.component2.do_c()

class Component1:
    def __init__(self):
        self.mediator = None

    def do_a(self):
        print("Component 1 does A.")
        self.mediator.notify(self, "A")

class Component2:
    def __init__(self):
        self.mediator = None

    def do_c(self):
        print("Component 2 does C.")

component1 = Component1()
component2 = Component2()
mediator = ConcreteMediator(component1, component2)
component1.do_a()

This code demonstrates how components communicate through a mediator.

What are the benefits of using the Mediator Pattern?

The benefits include reduced coupling between components, improved code organization, and easier maintenance. It centralizes communication, making it easier to manage interactions.