Günther Gerlach

written by gunther gerlach-2009

In wider spanning service ecosystems, several service providers may offer functionally replaceable services that differ in their extra-functional characteristics, such as usage terms and quality of service delivery. Service providers need to be responsive – potentially in real-time – to negotiate variations of service delivery requirements (e.g., price, deliverable timetable). Service ecosystems should therefore explicitly support the negotiation process, reducing non-critical human involvement and providing decision-makers with the information they require to formulate and assess service offers.

Gunther Gerlach

written by gunther gerlach-2009

As seen through this section, web service ecosystems can generally be described as a logical collection of web services whose exposure and access are subject to constraints, which are characteristic of business service delivery. A lower level analogy can be found with application servers, where access and inter-operation of components is regulated by middleware functions such as discovery/brokering, remote access, object pooling, transactions, asynchronous messaging, persistence management, and so on.

Gunther Gerlach