An Engineering Process for Autonomous Fault Management in Service-Oriented Systems

2010 ◽  
Author(s):  
Du Wan Cheun ◽  
Soo Dong Kim
Keyword(s):  
Fault Management ◽  
Engineering Process ◽  
Service Oriented

A Two Phases Self-healing Framework for Service-oriented Systems

2021 ◽  
Vol 15 (2) ◽  
pp. 1-25
Author(s):  
Amal Alhosban ◽  
Zaki Malik ◽  
Khayyam Hashmi ◽  
Brahim Medjahed ◽  
Hassan Al-Ababneh
Keyword(s):  
Web Services ◽  
A Priori ◽  
Fault Management ◽  
Service Selection ◽  
Exception Handling ◽  
Self Healing ◽  
Service Oriented Architectures ◽  
Service Oriented ◽  
Improved Performance ◽  
High Level

Service-Oriented Architectures (SOA) enable the automatic creation of business applications from independently developed and deployed Web services. As Web services are inherently a priori unknown, how to deliver reliable Web services compositions is a significant and challenging problem. Services involved in an SOA often do not operate under a single processing environment and need to communicate using different protocols over a network. Under such conditions, designing a fault management system that is both efficient and extensible is a challenging task. In this article, we propose SFSS, a self-healing framework for SOA fault management. SFSS is predicting, identifying, and solving faults in SOAs. In SFSS, we identified a set of high-level exception handling strategies based on the QoS performances of different component services and the preferences articled by the service consumers. Multiple recovery plans are generated and evaluated according to the performance of the selected component services, and then we execute the best recovery plan. We assess the overall user dependence (i.e., the service is independent of other services) using the generated plan and the available invocation information of the component services. Due to the experiment results, the given technique enhances the service selection quality by choosing the services that have the highest score and betters the overall system performance. The experiment results indicate the applicability of SFSS and show improved performance in comparison to similar approaches.

Policy-Based Security Engineering of Service Oriented Systems

2010 ◽  
pp. 118-133
Author(s):  
Antonio Maña ◽  
Gimena Pujol ◽  
Antonio Muñoz
Keyword(s):  
Formal Specification ◽  
Security Policy ◽  
Engineering Process ◽  
Specialized Knowledge ◽  
Security Engineering ◽  
Service Oriented ◽  
Automated Processing ◽  
Correct Application ◽  
High Level ◽  
The Web

In this chapter the authors present a policy-based security engineering process for service oriented applications, developed in the SERENITY and MISTICO projects. Security and dependability (S&D) are considered as first-class citizens in the proposed engineering process, which is based on the precise description of reusable security and dependability solutions. The authors’ process is based on the concept of S&D Pattern as the means to capture the specialized knowledge of security engineers and to make it available for automated processing, both in the development process (the focus of this chapter) and later at runtime. In particular, in this chapter they focus on the verification of the compliance with security policies, based on the formal specification of S&D Properties. The main advantages of the approach presented in this chapter are precisely that it allows us to define high-level policies and to verify that a secure oriented system complies with such policy (developed following the SERENITY approach). They also describe the application of the proposed approach to the verification of S&D properties in the web services (WS) environment. Concretely, the authors describe the use of SERENITY framework to facilitate the development of applications that use standard security mechanisms (such WS-Security, WS-Policy, WS-Security Policy, etc) and to ensure the correct application of these standard mechanisms, based on predefined policies. Finally, they show how to verify that the application complies with one or several S&D policies.

Policy-Based Security Engineering of Service Oriented Systems

2010 ◽  
pp. 392-406
Author(s):  
Antonio Maña ◽  
Gimena Pujol ◽  
Antonio Muñoz
Keyword(s):  
Formal Specification ◽  
Security Policy ◽  
Engineering Process ◽  
Specialized Knowledge ◽  
Security Engineering ◽  
Service Oriented ◽  
Automated Processing ◽  
Correct Application ◽  
High Level ◽  
The Web

In this chapter the authors present a policy-based security engineering process for service oriented applications, developed in the SERENITY and MISTICO projects. Security and dependability (S&D) are considered as first-class citizens in the proposed engineering process, which is based on the precise description of reusable security and dependability solutions. The authors’ process is based on the concept of S&D Pattern as the means to capture the specialized knowledge of security engineers and to make it available for automated processing, both in the development process (the focus of this chapter) and later at runtime. In particular, in this chapter they focus on the verification of the compliance with security policies, based on the formal specification of S&D Properties. The main advantages of the approach presented in this chapter are precisely that it allows us to define high-level policies and to verify that a secure oriented system complies with such policy (developed following the SERENITY approach). They also describe the application of the proposed approach to the verification of S&D properties in the web services (WS) environment. Concretely, the authors describe the use of SERENITY framework to facilitate the development of applications that use standard security mechanisms (such WS-Security, WS-Policy, WS-Security Policy, etc) and to ensure the correct application of these standard mechanisms, based on predefined policies. Finally, they show how to verify that the application complies with one or several S&D policies.

Template mediated crystal engineering

1994 ◽  
Vol 52 ◽  
pp. 480-481
Author(s):  
Brigid R. Heywood ◽  
S. Champ
Keyword(s):  
Crystal Engineering ◽  
Electrostatic Interactions ◽  
Alkyl Chain ◽  
Crystallographic Axis ◽  
Two Dimensional ◽  
Engineering Process ◽  
Solution Interface ◽  
Extensive Program ◽  
Geometric Homology ◽  
Long Alkyl Chain

Recent work on the crystallisation of inorganic crystals under compressed monomolecular surfactant films has shown that two dimensional templates can be used to promote the oriented nucleation of solids. When a suitable long alkyl chain surfactant is cast on the crystallisation media a monodispersied population of crystals forms exclusively at the monolayer/solution interface. Each crystal is aligned with a specific crystallographic axis perpendicular to the plane of the monolayer suggesting that nucleation is facilitated by recognition events between the nascent inorganic solid and the organic template.For example, monolayers of the long alkyl chain surfactant, stearic acid will promote the oriented nucleation of the calcium carbonate polymorph, calcite, on the (100) face, whereas compressed monolayers of n-eicosyl sulphate will induce calcite nucleation on the (001) face, (Figure 1 & 2). An extensive program of research has confirmed the general principle that molecular recognition events at the interface (including electrostatic interactions, geometric homology, stereochemical complementarity) can be used to promote the crystal engineering process.

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