Título: A Catalogue of Adaptation Rules to Support Local Changes in Microservice Compositions Implemented as Choreographies of BPMN Fragments
Autor: Ortiz Amaya, Jesús; Torres Bosch, María Victoria; Valderas Aranda, Pedro José
Resumen: Microservices need to be composed in order to provide their customers with valuable services. To do so, event-based choreographies are used many times since they help to maintain a lower coupling among microservices. In previous works, we presented an approach that proposed creating the big picture of the composition in a BPMN model, splitting it into BPMN fragments and distributing these fragments among microservices. In this way, we implemented a microservice composition as an event-based choreography of BPMN fragments. Based on this approach, this work focuses on supporting the evolution of a microservice composition. We pay special attention to how a microservice composition can be evolved from the local perspective of a microservice since changes performed locally can affect the communication among microservices and as a result the integrity of the whole composition. In particular, we present a catalogue of compensation rules that characterize all the local changes that can be done in an event-based communication element of a BPMN fragment. We also analyse the generated inconsistencies and propose the required actions to adapt the affected participants and guarantee a functional composition.
