Patrones de implementación para incluir comportamientos proactivos

Object oriented programming is facing challenges such as the development of software in distributed environments. Along this line has emerged the paradigm of agents. An agent shows behaviors, such as autonomy and proactivity, that differentiates it from an object. Proactivity allows developing goal-directed systems, in which a request is not necessary to start a task. Adding proactivity to a software is nowadays essential, there is a big dependence on computer systems and it is greater the delegation of tasks to them. The patterns have been used successfully in reducing development time and the number of errors in software, besides of being a guide to solve a typical problem. In this paper, we present two implementation patterns to add proactivity to software and to make it easier to work with agents. A case study about the development of a technology observatory using both patterns is also included.