WP-JRA-2.2

PO-JRA-2.2.1 Overview of the state of the art in composition and coordination of services — by Andreas Metzger — last modified May 19, 2009 10:11

This deliverable presents a survey on the state-of-the-art in service composition. The report is structured into three main sections. First, different models and languages for service composition are described. These involve service orchestration, choreography, wiring, coordination, and semantic WS composition. The next part evaluates approaches to creation and development of service compositions, including model-driven, automated, and QoS-aware service composition. Finally, formal methods to verification of service compositions are presented. Each section starts with an introduction and classification of the approaches and then describes the main contributions in the corresponding area.

CD-JRA-2.2.2 Models and Mechanisms for Coordinated Service Compositions — by Benedikt Liegener — last modified May 19, 2009 10:11

This deliverable describes the research roadmap and initial research work in the context of models and mechanisms for coordinated service compositions. It provides the foundations for the research in the WP JRA-2.2 by establishing a preliminary framework for QoS-aware adaptable service compositions. We present initial research results in some areas of this framework, in particular on models of service compositions, top-down development, and monitoring and adaptation of service compositions. The work will be continued and extended in the follow-up deliverables.

CD-JRA-2.2.3 Algorithms and Techniques for Splitting and Merging Service Compositions — by Osama Sammodi — last modified May 17, 2010 16:08

This deliverable investigates techniques for split and merge of service compositions, with the emphasis on approaches that aim at optimizing costs and performance of service compositions in out- and insourcing scenarios. The deliverable provides classification criteria applicable to any split technique in the state of the art, and some novel techniques that are classified accordingly. Moreover, the deliverable presents exploratory work on merge of service compositions.

CD-JRA-2.3.4 Decision support for local adaptation — by Osama Sammodi — last modified May 14, 2010 15:05

This deliverable is aimed at summarizing the joint research in WP-JRA-2.3. related to decision support for local adaptation. It is an intermediate stage on the research roadmap, starting from issues of local adaptation and self-healing (CD-JRA-2.3.2) to the most complex case involving distributed multi-level adaptation (CD-JRA-2.3.8), where we investigate and integrate certain methods and techniques incrementally. The work is based on and motivated by the antecedent deliverable ''Basic requirements for self-healing services and decision support for local adaptation'' (CD-JRA-2.3.2) and is focused on local adaptation and decision which we consider one of the most important ways to investigate the applicability of certain policies to trigger local adaptation mechanism, and is organized around the general adaptation framework introduced in CD-JRA-2.3.2. Results are presented in 10 published papers that constitute the core contribution of this deliverable. The work is positioned within the Integrated Research Framework (IRF, WP-IA-3.1), internal WP-JRA-2.3 research architecture and overall WP-JRA-2.3 goals and visions.