An Open-Source Cloud Architecture for Big Stream IoT Applications - Interoperability and Open-Source Solutions for the Internet of Things - page 85

a data object is created and point in time when the processed object can be
delivered to a consumer, we have detailed the designed listener-based archi-
tecture and its components: Acquisition Module, Normalization Module, Graph
Framework, and Application Register. The implementation of the overall system
and its evaluation on a real-world Smart Parking dataset has been presented.
The listener-oriented approach can lead to several benefits, such as (i) decreased
latency: the push-based approach guarantees that no delays due to polling and
batch processing are introduced; (ii) fine-grained self-configuration: listeners can
dynamically “plug” to those that output data of interest; (iii) optimal resource
allocation: processing units that have no listeners can be switched off, while
those with many listeners can be replicated, thus leading to cost-effectiveness
from the Cloud service perspective.
Acknowledgments. The work of Simone Cirani is funded by the European Commu-
nity's Seventh Framework Programme, area “Internetconnected Objects”, under Grant
no. 288879, CAL IP SO project - Connect All IP -based Smart Objects! The work reflects
only the authors views; the European Community is not liable for any use that may
be made of the information contained herein.The work of Marco Picone is funded
by Guglielmo srl, Reggio Emilia (RE), Italy. The work of Laura Belli is funded by
Multitraccia S.C., Reggio Emilia (RE), Italy.
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