Enhancing Reusability and Simplifying the OO Development with the Use of Events and Object Environment

Abstract

Object-oriented(OO) software development enhances reusability. But reuse and object composition are not straightforward. Only compatible components, which conform to the same client-server protocol, can be composed. In this paper we propose an event-driven approach to OO software development which enhances reusability by increasing the openness of objects and provides a simple composition principle. It bases on concepts of events and object environment. Object environment serves as a mediator among independent objects. It consists of agents that monitor and respond to object notifications of events that occur through the life-cycle of each object. Events enhance object openness and so reusability and allow uncoupled programming style. Uncoupled programming style together with a simple composition principle provided by the use of the object environment allow easy production of powerful building blocks and simple construction of the complex software from powerful building blocks.