Runtime monitoring of web service choreographies using streaming XML
Sylvain Hallé, Roger Villemaire · 2009
A wide range of web service choreography constraints on the content and sequentiality of messages can be translated into Linear Temporal Logic (LTL). Although they can be checked statically on abstractions of actual services, it is desirable that violations of these specifications be also detected at runtime. In this paper, we show that, given a suitable translation of LTL formulæ into XQuery expressions, such runtime monitoring of choreography constraints is possible by feeding the trace of messages to a streaming XQuery processor. The forward-only fragment of LTL is introduced; it represents the fragment of LTL supported by available streaming engines.