
302 Cyber-Physical Systems: From Theory to Practice
12.3.3 SERVICE TIER
The Service Layer contains the implementation of web services that correspond to the ITS work
processes and applications. ONE-ITS services are contained within an application server and are
described using the standard WSDL format. The application server keeps these services published
on a community service registry via SOAP/HTTP. Portlets exchange SOAP messages to query the
service registry and to interact with ITS services. ONE-ITS services gather ITS data, grid resources,
and raw bandwidth required to carry out their functionality.
ONE-ITS employs Spring-WS [11] to build contract-first ...