Introduction to the Special Issue on Recent Advances in Web Services

Abstract

Abstract:We have collected five papers describing different aspects of web services and cloud computing. Cloud computing is the next stage of application interoperability and it is a logical extension of web services, both approaches being a variety of Service-Oriented Architecture. The papers cover security, migration, certification, and application development. Together, these papers provide a useful panorama of some of the issues of these two technologies.

Cross - layer monitoring and adaptation of multi - cloud service - based applications

“…These two computing paradigms are closely interrelated, as Web services are the main SaaS type deployed on Cloud infrastructures, while the virtualized Cloud resources provide an efficient application delivery platform for the SBA developers. As the author in [Fernandez 2012] point out, Cloud computing is a new embodiment of SOC, where users access a variety of services to implement their functional needs. Instead of providing users with application-oriented services, now users can access services on any architectural level, using the Cloud as the conduit with the primary Cloud SBA.…”

“…Chapter 5 presents the proposed meta-models for describing the monitoring events, the components comprising a Cloud SBA and the adaptation actions. Chapter 6 introduces the proposed event pattern discovery algorithm [Zeginis et al 2014a;b] for identifying event patterns related to specific SLO violations, while Chapter 7 examines how the proposed framework supports both reactive and proactive adaptation. Chapter 8 provides implementation details for the traffic management application (i.e.…”