• Proceedings of the Korea Inteligent Information System Society Conference
• /
• 2003.05a
• /
• pp.385-391
• /
• 2003

상이한 IT 환경 기반의 여러 기업이 협업하는 방법 중 하나가 각 기업이 가진 비즈니스를 웹서비스로 오픈하고 웹서비스 협업 프레임워크 위에서 상호 협업하여 다자간 비즈니스 프로세스를 구축하는 것이다. 본 논문의 시스템은 웹서비스 기반 비즈니스 프로세스 모델링 언어인 BPEL4WS 위에 협업 프레임워크 명세인 WS-Coordination / Transaction 프레임워크를 결합한 아키텍처를 구현한 서비스 통합 시tm템이다. 이 시스템 위에 다자간 비즈니스 프로세스를 운용할 수 있는 BPM 포탈인 금융포탈을 구축하여 본 논문의 시스템 활용성을 검증하였다. 또한 웹서비스. 협업 프레임워크를 실 업무에 적용할 때 예상되는 문제점을 미리 도출하고 그에 대응하기 위한 목적으로, 이 시스템의 협업 기능에 대해 테스트를 실시 하였다.

• Proceedings of the Korean Operations and Management Science Society Conference
• /
• 2003.05a
• /
• pp.772-779
• /
• 2003

In the real world, business processes are very complex and composed or heterogeneous business activities. As the advent or the Web services enables business processes to be Integrated and to be automated. It makes enterprises integrate heterogeneous business processes from different business partners as well as their internal business processes. To support recent trends in integration of business processes, BPEL, WS-E and WS-T specipications have been established since 2002 WS-C and WS-T describe the reliable business environment including compensation (undo) or completed business processes. The compensation of business processes is a basic requirement for automation or business processes among business partners. Systems implementing these specifications, however, very rarely exist. It's not only because those specifications are developed recently. but also because they are not perfect yet. In this paper, a new business process transaction management, which complements the deficiency of WS-E and WS-T, is suggested. Furthermore, the new approach proposes the business logics for supervisory coordinators which manage serial and parallel business gates The modification or traditional WS-T specification and the simplification or WS-E specification make business processes managed effectively.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2010.11a
• /
• pp.996-999
• /
• 2010

Business transactional process is usually long running computation which requests services from multiple enterprises. Web Services Transaction specification (WS-TX) defines a protocol, WS-BusinessActivity which is specifically designed for such lengthy interaction and maintains overall consistency through compensation. However timely web services transaction is prone to compensate due to tasks' missing deadline. Therefore, this paper proposes a reservation-based protocol which is used to select providers who can provide resources promptly and deselect ones who may fail. And this selection happens during resource reservation phase and before real commitment. In this way, we achieve the goal of minimizing transactions' compensation. Finally, we design the framework architecture for the proposed protocol that is extended from WS-BusinessActivity.

• Proceedings of the CALSEC Conference
• /
• 2003.09a
• /
• pp.109-114
• /
• 2003

WS-BPMS(web service driven business process management system)은 기업 내 또는 비즈니스 파트너들 간의 비즈니스 프로세스를 체계적으로 통합, 관리하여 프로세스를 개선하고 자동화한다. 이는 비즈니스 프로세스를 검색한 후 BPEL4WS, BPML 등의 프로세스 메타모델을 이용하여 새 프로세스를 디자인하고 BPMS위에 전개 실행하는 과정을 거치게 된다. 디자인된 프로세스는 복잡하여 그 실행에 있어 체계적이고 확고한 기반을 바탕으로 운영되어야 한다. 이를 위해 본 논문에서는 BPMS의 운영에 있어 pi-calculus를 기반으로 한 structured exception handling 방법론과 transaction 모니터링을 통한 backward recovery 방법을 제시한다.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2011.04a
• /
• pp.763-766
• /
• 2011

Timely management is an important activity in long running transactions. This can be seen in many Supply Chain scenarios where insufficient time management could lead to expensive compensations. Therefore, effective strategy for timely management in long running transactions is needed. In this paper, we propose our solution to detect and avoid violating deadline based on a comparison strategy of predicted complete time and required deadline. Three approaches are used. Firstly, we build Open Nested Transaction Model (ONTM) where deadline of top-level transactions are managed through a flexible time adjustment of lower level transactions. Secondly, workflow is introduced to WSTransaction framework which supports the algorithm to predict complete time and spot delaying activities. Thirdly, a rule-based coordinator is developed to decide the confirmation or cancelation of participants' ongoing activities. We also discuss a workflow example for implementation.

• KSII Transactions on Internet and Information Systems (TIIS)
• /
• v.5 no.10
• /
• pp.1841-1861
• /
• 2011

The advance in Service-Oriented Architecture (SOA) and web services has led to the development of new types of a system in which heterogeneous service components can connect and compose to solve a complex business problem. In the SOA, even though these service components are valid in their functionality, there is a need to test their behaviors when those services are composited. In recent years, WS-BPEL has received a wide acceptance as a means of integrating distributed service components. To test the composite service, the existing testing techniques have been focused on the functional features based on the WS-BPEL process. However as SOA approach is applying to real-time software development, the performance of composite service becomes one of important issues. This paper proposes a technique to the performance testing of a composite service with WS-BPEL extension which combined with the concept of aspect. Our WS-BPEL extension has been made towards annotating aspect component which is measuring the response time of the composite service. This paper also explains the procedure of performance testing with on-line transaction system. Our technique can apply to choose an adequate component in service composition with considering the performance among several candidate web service components.

• The KIPS Transactions:PartD
• /
• v.14D no.2
• /
• pp.265-272
• /
• 2007

In this paper, we implement an automated composition system of web services using hybrid techniques that merge the benefit of BPEL techniques, with the advantage of OWL-S, BPEL techniques have practical capabilities that fulfil the needs of the business environment such as fault handling and transaction management. However, the main shortcoming of these techniques is the static composition approach, where the service selection and flow management are done a priori and manually. In contrast, OWL-S techniques use ontologies to provide a mechanism to describe the web services functionality in machine-understandable form, making it possible to discover, and integrate web services automatically. This allows for the dynamic integration of compatible web services, possibly discovered at run time, into the composition schema. However, the development of these approaches is still in its infancy and has been largely detached from the BPEL composition effort. In this work, we describe the design of the SemanticBPEL architecture that is a hybrid system of BPEL4WS and OWL-S, and propose algorithms for web service search and integration. In particular, the SemanticBPEL has been implemented based on the open source tools. The proposed system is compared with existing BPEL systems by functional analysis. These comparisions show that our system outperforms existing systems.

• Journal of KIISE:Computing Practices and Letters
• /
• v.15 no.7
• /
• pp.510-514
• /
• 2009

If the existing real-time systems are integrated based on SOA, real-time SOA should be developed. Generally, in real-time SOA a service can be divided into several small services and their estimated execution time is given by provider systems. However, an estimation, which analyzes time elements related to transmit and receive messages among requesters and providers, is needed. In order to enhance QoS of Web service, this paper proposes enhanced worst-case execution time estimation by considering WS-transaction and common use of multi-processors system.