Architectural Reflection Realising Software Architectures via Reflective Activities

Tisato, Francesco; Savigni, Andrea; Cazzola, Walter; Sosio, Andrea

doi:10.1007/3-540-45254-0_10

Cited by 20 publications

(16 citation statements)

References 18 publications

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“…However, the principles of computational reflection are also applicable to programming-in-the-large, which represents the complex self-adaptive software systems we are interested in our research [Andersson et al 2009b]. In fact, numerous previously developed self-adaptation approaches (e.g., [Cazzola et al 1999;Tisato et al 2001;Blair et al 2004]) are based on the principles of reflection. Figure 1 provides an overview of the FORMS's primitives and their relationships to the reflection perspective.…”

Section: Reflection Perspectivementioning

confidence: 99%

Forms

Weyns

Malek

Andersson

2012

ACM Trans. Auton. Adapt. Syst.

141

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The challenges of pervasive and mobile computing environments, which are highly dynamic and unpredictable, have motivated the development of self-adaptive software systems. Although noteworthy successes have been achieved on many fronts, the construction of such systems remains significantly more challenging than traditional systems. We argue this is partially because researchers and practitioners have been struggling with the lack of a precise vocabulary for describing and reasoning about the key architectural characteristics of self-adaptive systems. Further exacerbating the situation is the fact that existing frameworks and guidelines do not provide an encompassing perspective of the different types of concerns in this setting. In this paper, we present a comprehensive reference model, entitled FOrmal Reference Model for Self-adaptation (FORMS), that targets both issues. FORMS provides rigor in the manner such systems can be described and reasoned about. It consists of a small number of formally specified modeling elements that correspond to the key concerns in the design of self-adaptive software systems, and a set of relationships that guide their composition. We demonstrate FORMS's ability to precisely describe and reason about the architectural characteristics of distributed self-adaptive software systems through its application to several existing systems. FORMS's expressive power gives it a potential for documenting reusable architectural solutions (e.g., architectural patterns) to commonly encountered problems in this area.

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Section: Reflection Perspectivementioning

confidence: 99%

Forms

Weyns

Malek

Andersson

2012

ACM Trans. Auton. Adapt. Syst.

141

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“…Introspection is the observation of an application's own behavior, while intercession is the reaction on introspection's results, which can be structural, parameter or context adaptation [67]. Reflection techniques have been investigated with self-adaptive systems as an underlying principle for self-awareness on different levels of software, e.g., architectural reflection [68], behavioral reflection. However, these methods apply reflection on the software itself, while we consider reflexive behavior with respect to unanticipated changes at the larger ecosystem level to support evolution of the ecosystem, and not at the system level.…”

Section: Reflexivitymentioning

confidence: 99%

A survey of autonomic computing methods in digital service ecosystems

Abeywickrama

Ovaska

2016

SOCA

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Service engineering of digital service ecosystems can be associated with several challenges, such as change and evolution of requirements; gathering of quality requirements and assessment; and uncertainty caused by dynamic nature and unknown deployment environment, composition and users. Therefore, the complexity and dynamics in which these digital services are deployed call for solutions to make them autonomic. Until now there has been no upto-date review of the scientific literature on the application of the autonomic computing initiative in the digital service ecosystems domain. This article presents a review and comparison of autonomic computing methods in digital service ecosystems from the perspective of service engineering, i.e., requirements engineering and architecting of services. The review is based on systematic queries in four leading scientific databases and Google Scholar, and it is organized in four thematic research areas. A comparison framework has been defined which can be used as a guide for comparing the different methods selected. The goal is to discover which methods are suitable for the service engineering of digital service ecosystems with autonomic computing capabilities, highlight what the shortcomings of the methods are, and identify which research activities need to be conducted in order to overcome these shortcomings. The comparison reveals that none of the existing methods entirely fulfills the requirements that are defined in the comparison framework.B Dhaminda B. Abeywickrama

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“…Few ADLs support dynamic architecture representation: Darwin (Magee et al, 1995), Dynamic Wright (Allen et al, 1998), -Space (Chaudet & Oquendo, 2000), C2SADEL (Medvidovic et al, 1999;, Piccola (Nierstrasz & Achermann, 2000), Pilar (Cuesta et al, 2005), ArchWare -ADL Oquendo 2004), ArchWare C&C-ADL . Most of them are not suitable to support unplanned dynamic architecture evolution as they consider different representations for the concrete and abstract levels, and use reflection mechanisms to switch among these representations: a dynamic architecture is first defined at abstract level and is then reflected (1) into a dynamic evolvable concrete software-intensive system (Cazzola et al, 1999;Tisato et al, 2000) or (2) into another, evolved abstract representation (Cuesta et al, 2001;Cuesta et al, 2005). The link between the abstract level and the concrete one is not maintained, leading to a situation in which only anticipated modifications can be supported dynamically.…”

Section: Related Workmentioning

confidence: 99%