A Web Magazine for Software Developers The Task Pattern: A Design Pattern for Processing and Monitoring Long-Running Tasks

This paper is divided in eight sections: In the first section I examine the problem and motivation for this design pattern. In the second section I explain the pattern in a basic “hello world ” manner. Then in the third section I integrate the Task Pattern with the Gang of Four Command, Command Holder and Mediator patterns. In the fourth section I explain how to use the Task Pattern with a worker thread. (The worker thread approach is recommended for production systems.) In the next section the paper explores implementing the pattern with aspects. In the sixth section I present a quick case study of the use of the Task Pattern. In the last two sections the paper does a summary and conclusion and cites references