Building New Applications Using Service-Oriented Architectures

2003 ◽  
Author(s):  
Robert Eugene
Keyword(s):  
Service Oriented Architectures ◽  
Service Oriented ◽  
New Applications

Engineering a Service-Oriented Architecture in E-Government

2005 ◽  
pp. 340-352
Author(s):  
Marijn Janssen
Keyword(s):  
Service Oriented Architecture ◽  
Legacy Systems ◽  
Public Servants ◽  
Service Oriented Architectures ◽  
Quality Requirements ◽  
Share Data ◽  
Service Oriented ◽  
New Applications ◽  
Further Development

Service-oriented enterprise architectures have gained considerable attention of politicians and public servants as a solution for designing new applications and leveraging investments in legacy systems. Service-oriented architectures can help to share data and functionality among information systems and provide the flexibility to include existing legacy systems, which cannot be replaced easily and otherwise restrict further development. In this chapter, the design of a service-oriented architecture in public administration is explored. A case study is conducted at the Ministry of Justice, and a service-oriented architecture is designed, implemented, and evaluated. The architecture is evaluated based on a number of quality requirements. This case study shows the feasibility to replace functionality formerly offered by legacy systems and shows limitations of current technology. This chapter should lead to a greater understanding of the concept of service-oriented architectures in e-government.

Local, Regional and National Interoperability in Hospital-level Systems Architecture

2007 ◽  
Vol 46 (04) ◽  
pp. 470-475 ◽  
Author(s):  
M. Korpela ◽  
S. Ripatti ◽  
J. Rannanheimo ◽  
J. Sorri ◽  
J. Mykkänen
Keyword(s):  
Health Care ◽  
Service Oriented Architecture ◽  
Health Care Facilities ◽  
Continuous Change ◽  
Hospital Level ◽  
Service Oriented Architectures ◽  
Systems Architecture ◽  
Policy Makers ◽  
Service Oriented ◽  
New Applications

Summary Objectives: Interoperability of applications in health care is faced with various needs by patients, health professionals, organizations and policy makers. A combination of existing and new applications is a necessity. Hospitals are in a position to drive many integration solutions, but need approaches which combine local, regional and national requirements and initiatives with open standards to support flexible processes and applications on a local hospital level. Methods: We discuss systems architecture of hospitals in relation to various processes and applications, and highlight current challenges and prospects using a service-oriented architecture approach. We also illustrate these aspects with examples from Finnish hospitals. Results: A set of main services and elements of service-oriented architectures for health care facilities are identified, with medium-term focus which acknowledges existing systems as a core part of service-oriented solutions. The services and elements are grouped according to functional and interoperability cohesion. Conclusions: Atransition towards service-oriented architecture in health care must acknowledge existing health information systems and promote the specification of central processes and software services locally and across organizations. Software industry best practices such as SOA must be combined with health care knowledge to respond to central challenges such as continuous change in health care. A service-oriented approach cannot entirely rely on common standards and frameworks but it must be locally adapted and complemented.

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.

DESIGN OF DECOUPLED CLINICAL DECISION SUPPORT FOR SERVICE-ORIENTED ARCHITECTURES

2009 ◽  
Vol 19 (02) ◽  
pp. 159-183 ◽  
Author(s):  
JENS WEBER-JAHNKE
Keyword(s):  
Decision Support ◽  
Clinical Decision Support ◽  
Service Oriented Architecture ◽  
Empirical Evaluation ◽  
Cost Savings ◽  
Clinical Decision ◽  
Service Oriented Architectures ◽  
Distributed Services ◽  
Service Oriented ◽  
Computer Based

Computer-based clinical decision support (CDS) contributes to cost savings, increased patient safety and quality of medical care. Most existing CDS systems are stand-alone products (first generation) or part of complete electronic medical record packages (second generation). Experience shows that creating and maintaining CDS systems is expensive and requires effort that should be economized by sharing them among multiple users. It makes good economic sense to share CDS service installations among a larger set of client systems. The paradigm of a service-oriented architecture (SOA) embraces this idea of sharing distributed services. Some attempts making CDS services available to distributed health information systems exist. However, these approaches have not gained much adoption. We argue that they do not provide a sufficient level of decoupling between client and CDS in order to be broadly reusable in SOAs. In this paper, we present a new CDS service component called EGADSS, which has been designed and implemented with the declared objective to minimize the coupling between client and CDS server. We present our key design decisions, which are guided by empirical research in SOA development. We evaluate our result theoretically by measuring the level of decoupling achieved compared to existing CDS approaches. Furthermore, we report on an empirical evaluation of the resulting design, integrating the EGADSS service with an example client system.

Supporting the dynamic evolution of Web service protocols in service-oriented architectures

2008 ◽  
Vol 2 (2) ◽  
pp. 1-46 ◽  
Author(s):  
Seung Hwan Ryu ◽  
Fabio Casati ◽  
Halvard Skogsrud ◽  
Boualem Benatallah ◽  
Régis Saint-Paul
Keyword(s):  
Web Service ◽  
Dynamic Evolution ◽  
Service Oriented Architectures ◽  
Service Oriented
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