Rich applications merge classical computing, client-server concurrency,
web-based interfaces, and the complex time- and event-based reactive
programming found in embedded systems. To handle them, we extend the Hop web
programming platform by HipHop, a domain-specific language dedicated to
event-based process orchestration. Borrowing the synchronous reactive model of
Esterel, HipHop is based on synchronous concurrency and preemption primitives
that are known to be key components for the modular design of complex reactive
behaviors. HipHop departs from Esterel by its ability to handle the dynamicity
of Web applications, thanks to the reflexivity of Hop. Using a music player
example, we show how to modularly build a non-trivial Hop application using
HipHop orchestration code.Comment: International Conference on Distributed Computing and Internet
Technology (2014
