Active Object

Design pattern to facilitate asynchronous programming

Aug 31, 2025

Active Object is a design pattern to facilitate asynchronous programming. With the Active Object pattern, we decouple method invocation from method execution with the help of a queue and scheduler.

Components

• Interface - Provides the publicly accessible methods
• Pending requests list - A list of pending requests from clients
• Scheduler - Decides which request to execute next
• Implementation - The implementation of the active object methods
• Callback or variable - For the client to receive the result