3 research outputs found
Towards Run-Time Verification of Compositions in the Web of Things using Complex Event Processing
Following the vision of the Internet of Things, physical world entities are integrated into virtual world things. Things are expected to become active participants in business and social processes. Then, the Internet of Things could benefit from the Web Service architecture like today’s Web does, so Future ser-vice-oriented Internet things will offer their functionality via service-enabled in-terfaces. In previous work, we demonstrated the need of considering the behav-iour of things to develop applications in a more rigorous way, and we proposed a lightweight model for representing such behaviour. Our methodology relies on the service-oriented paradigm and extends the DPWS profile to specify the order with which things can receive messages. We also proposed a static verifi-cation technique to check whether a mashup of things respects the behaviour, specified at design-time, of the composed things. However, a change in the be-haviour of a thing may cause that some compositions do not fulfill its behaviour anymore. Moreover, given that a thing can receive requests from instances of different mashups at run-time, these requests could violate the behaviour of that thing, even though each mashup fulfills such behaviour, due to the change of state of the thing. To address these issues, we present a proposal based on me-diation techniques and complex event processing to detect and inhibit invalid invocations, so things only receive requests compatible with their behaviour.Work partially supported by projects TIN2008-05932, TIN2012-35669, CSD2007-0004 funded by Spanish Ministry MINECO and FEDER; P11-TIC-7659 funded by Andalusian Government; and Universidad de Málaga, Campus de Excelencia Internacional AndalucĂa Tec
Dynamic verification of mashups of service-oriented things through a mediation platform
The new Internet is evolving into the vision of the Internet of Things, where physical
world entities are integrated into virtual world things. Things are expected to become active
participants in business, information and social processes. Then, the Internet of Things could
benefit from the Web Service architecture like today’s Web does; so Future service-oriented
Internet things will offer their functionality via service-enabled interfaces. As demonstrated in
previous work, there is a need of considering the behaviour of things to develop applications in
a more rigorous way. We proposed a lightweight model for representing such behaviour based
on the service-oriented paradigm and extending the standard DPWS profile to specify the
(partial) order with which things can receive messages. To check whether a mashup of things
respects the behaviour, specified at design-time, of composed things, we proposed a static
verification. However, at run-time a thing may change its behaviour or receive requests from
instances of different mashups. Then, it is required to check and detect dynamically possible
invalid invocations provoked by the behaviour’s changes. In this work, we extend our static
verification with an approach based on mediation techniques and complex event processing to
detect and inhibit invalid invocations, checking that things only receive requests compatible
with their behaviour. The solution automatically generates the required elements to perform
run-time validation of invocations, and it may be extended to validate other issues. Here, we
have also dealt with quality of service and temporal restrictions