Petri nets-based method to model and analyse the self-healing web service composition

Abstract

Service composition is an important means for integrating the individual web services to create new value added systems that can satisfy complex requirements. Such applications are subject to unexpected failure owing to the distributive and heterogeneous environment of web service. In this paper, we propose a Petri nets-based method to model and analyse the self-healing service composition. Aspect oriented programming is used to extract composition processes and self-healing strategy as the core and crosscutting concerns. A self-healing strategy of component and service composition is proposed, and the related operations of self-healing are abstracted as meta-objects by using reflection mechanism. Petri nets are used to construct the base layer model, meta layer model, meta-object protocol and other components, thus forming the self-healing model. The operational semantics and related theories of Petri nets help prove its effectiveness and correctness. A simulation example shows that our approach correctly describes the self-healing process of service composition, and contributes to improving the quality.

Applying Aspect Oriented Programming in Distributed Application Engineering

“…Authors in [12] have proposed a formal method through a Petri net-based algebra for aspect-oriented web service composition. The formal semantics of the composition operation including composition operation for modeling basic compositions and crosscutting operation for modeling aspects is expressed in terms of Petri nets.…”

A path detecting method to analyze the interactive compatibility of service processes based on WS‐BPEL

“…For some new representative methods using Petri nets as formalism to study Web service, we refer the readers to other works. 5,6,[12][13][14] A parameterized automat (named as finite state machine or state automat in some literatures) was used to represent Web service orchestrations, and the compatibility of two Web services was discussed from the aspects of interface, safety, and liveness in the work of Belkhir et al 15 The validation and verification of Web services choreographies with timing restrictions was studied by using timed automata in the work of Cambronero et al 16 Process algebra that was used to encode the adaptation problem and the on-the-fly exploration and reduction techniques to compute adaptor protocols were also proposed in the work of Mateescu et al 17 The π-calculus was used to model service behaviors and interactions in the work of Agarwal and Agarwal, 18 and an algorithm was presented to compute the compatibility degree in a quantitative way. The labeled transition system was also used to model Web service in the work of Bordeaux et al 19 and the compatibility was defined by no opposite behavior and free deadlock.…”