Observer

Visual Paradigm Community Circle > UML Diagrams > GoF Design Patterns > Observer

This is a UML class diagram for the observer design pattern.

Purpose

Lets one or more objects be notified of state changes in other objects within the system.

Use When

  • State changes in one or more objects should trigger behavior in other objects
  • Broadcasting capabilities are required.
  • An understanding exists that objects will be blind to the expense of notification.
Import into your Project

Posted by: Brittany Shook

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