ProgCEP: A Programming Model for Complex Event Processing over Fog Infrastructure

Complex Event Processing (CEP) is a powerful paradigm that can derive meaningful insights by correlating multiple data sources, e.g., in the Internet-of-Things applications. However, these applications often require deployment across a wide variety of devices ranging from mobile devices to edge and cloud or simply put: fog infrastructure. This is not easily possible using existing programming models because of missing (i) support for deployment on heterogeneous devices and (ii) important interfaces for the deployment of CEP, e.g., for developing operator placement algorithms.AB@In this paper, we present ProgCEP: a programming model that facilitates the development of the operator placement algorithm and its deployment in a fog computing setting. In addition, it is portable and deployable on any kind of fog infrastructure and provides dynamic scaling of resources and deployment using the operator placement algorithm. We evaluate ProgCEP on its applicability and realizability on a publicly available fog testbed involving on-site, GENI and CloudLab resources using Docker tools. To this end, we enable (i) deployment of CEP using our dockerized implementation on the aforementioned fog infrastructure in less than 50 secs (on 25 distributed resources) and (ii) easy development of operator placement algorithms in terms of minimum lines of code.