Adaptive middleware systems have been designed for various computing environments, including wireless sensor networks, IoT and cloud computing. Whatever the environment, however, the adaptation logic of these middleware systems rarely adopts control theory concepts. To shed some light on this topic, this paper presents the steps to using control theory in implementing an adaptive mechanism for a popular middleware model: message-oriented middleware, also known as messaging systems. These steps have been employed in a widely adopted open-source messaging system named RabbitMQ. This paper’s contributions are on how to employ control theory step-by-step in messaging systems, along with some initial results on using P, PI and PID controllers.

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