Middleware for Testos Framework

This goal of this thesis is to create a communication bus for the Testos platform, which enables the tools to communicate and utilize each other's services. The thesis consists of a research of current Publish-Subscribe protocols and solutions. It also outlines the requirements for a communication bus that fits the Testos platform's needs and proposes solutions that satisfy them.As a part of the research, there were 3 message-oriented software solutions explored - MQTT, DDS and AMQP. The examination of each solution was focused on the communication model and main features. The MQTT protocol was chosen as the starting point of the bus implementation. The thesis also specifies how to extend the protocol in order to satisfy the requirements.Main MQTT extensions proposed by this project include an introduction of a management of request life cycle on top of the MQTT message delivery and the request/response mechanism. The protocol was also expanded by ability to pack messages into a BULK packet to decrease the needed network resources.The result is a Testos Bus, which is based on a modified and expanded version of MQTT, that includes a broker implementation as well as implementation of client libraries for Python and C++. Testos Bus satisfies all mandatory requirements, which is verified by automated tests.

Communication bus, communication middleware, messaging, MQTT protocol, publish-subscribe pattern, request management.