Web Service Migration Research Articles

A Case Study

This article provides a proof-of-concept of the applicability and reusability of the authors proposed framework for web service migration through a traffic jam detection case study. The framework migrates mobile hosted web services between mobile vehicles using context-aware self-adaptive mechanism in order to guarantee service availability and quality. A decision-making process is implemented to select the best destination vehicle from between the found possible migrations based on prioritized criteria set.

Service Discovery Based on Self-Evolution of Domain Ontology and Cloud Migration of Web Service

To meet the demand of the higher precision ratio and recall ratio of service search, a method of Web service discovery is proposed based on ontology evolution and Web service migration. According to the developed cloud service platform and the existed service repository and domain ontology list, a service migration process is proposed which migrate to the cloud platform and implement unified management for Web service. This process effectively achieves that Web services migrate in and out of the cloud platform. In order to realize the self-evolution of domain ontology, an ontology alignment mechanism is designed to automatic extend and replace of ontology concept. This mechanism achieves the integration of different keywords with the same meaning and ensures the consistency of ontology concept. In this paper, the method not only enables efficient service discovery and dynamic service management, but also can achieve high concurrency support of services and supply or billing on demand. The experiments show that the proposed method solves the search problem of low efficiency based on keyword, and it effectively improves the precision ratio and recall ratio of service discovery.

Ontology-Based Context Modelling and Reasoning in the Web Service Migration Framework

The advancement in ubiquitous computing requires more effort to cope with contextual changes in the environment and to adapt to these changes in regular and efficient ways. A context model and context-awareness are proposed to provide a model of the contextual information and to describe its impact on individual behaviour of system's components and on rules and relationships which control their interactions. This paper extends the Web service migration framework which provides software support for services migrating between potential service providers in service-oriented architecture according to the contextual changes. The extension utilises ontology-based context modelling in OWL/RDF and reasoning by means Jena reasoners and rules to make necessary migration decisions. Applications of ubiquitous computing in diverse envi- ronments and needs for automatic adaptation to cope with changing contextual information in the environments lead to emerging context awareness in the ubiquitous systems. The context awareness enables a system to process contextual in- formation, to be aware of contextual changes and consequent interactions between system components during runtime. Context-aware computing was introduced at the first time by (1) as the ability of a mobile user's applications to dis- cover and react to changes in the environment. The mobile user uses these applications to monitor and derive informa- tion on the surrounding environment. This information has meaningful observations which will be used to adapt the system according to its current status. The context term was defined by (2) as any information that can be used to charac- terize the situation of an entity. An entity is a person, place, or object that is considered to be relevant to the interaction between a user and an application, including the user and applications themselves. The contextual information available to a system or its components is modelled by a context model. In the case of service-oriented architecture (SOA), context models de- scribe contextual information available to individual ser- vices, which may extend a functional description of the services provided by usual means (e.g., their description in Web Services Description Language (WSDL)), and the actual state of service providers' environment affecting their availability (e.g., available resources or quality of network connections). In this way, context modelling makes ser- vices more accessible and discoverable. Moreover, sharing context models between different environments allows to es- tablish a common contextual base for system or component

HTML5 기반 융합 서비스의 서비스이동 메커니즘 설계

최근, W3C에서는 웹을 통해 다양한 웹 응용을 제공할 수 있는 기능을 포함하는 HTML5의 표준화가 추진 중이다. 광대역 무선 네트워크의 등장 및 스마트 TV, 태블릿 PC, 스마트 폰과 같은 스마트 단말이 웹 브라우저를 탑재함에 따라 스마트 단말을 통해 언제 어디서나 웹 서비스를 이용하는 것이 가능해졌다. 또한 사용자가 다수의 단말을 보유함에 따라 상황에 맞는 단말을 사용하여 웹 응용을 이용하는 멀티스크린 서비스의 요구가 증가하고 있다. 본 논문에서는 HTML5 기반의 웹 플랫폼에서 웹 객체를 그룹화하는 방안, 이동할 웹 객체의 정보를 추출하는 방안 및 다른 단말로부터 전달받은 웹 객체 정보를 기반으로 새로운 객체를 생성하는 방안을 제안한다. 또한 HTML5 기반 개방형 웹 플랫폼에서 단말 간 웹 응용을 이동하는 웹 서비스 이동 구조를 제안하였으며 이를 구현하여 테스트용 웹 문서와 일반 웹 문서에 대해 크롬 확장기능을 이용하여 검증하였다. 마지막으로 node.js와 웹 소켓을 이용하여 단말 간 객체 정보를 전달하는 메커니즘을 구현하고 제안한 방안을 검증하였다. Recently, the W3C has developed the HTML5 standard which gives the basis for providing various web applications on the web environments. Because of the advent of the smart devices and the broadband wireless network, users can accesse the web applications on the smart devices at anytime and anywhere. In addition, the demand on the multiscreen services, which enables users to use the appropriate device to their situation, has increased, since users have various smart devices. In this paper, we propose the grouping mechanism of web objects on the HTML5 based web platform, the extraction mechanism of the web object information which is used to create the web object on other devices, and the web object creation mechanism based on the received web object information. In addition, we propose the web service migration architecture between devices on the open web platform and implement the grouping, extraction and creation mechanism of the web objects on the test web document and generic web document with Chrome extension. Finally, we implement the delivery mechanism of the web object information between devices using the node.js and the WebSocket technologies.

A Semantically Automated Protocol Adapter for Mapping SOAP Web Services to RESTful HTTP Format to Enable the Web Infrastructure, Enhance Web Service Interoperability and Ease Web Service Migration

Semantic Web Services (SWS) are Web Service (WS) descriptions augmented with semantic information. SWS enable intelligent reasoning and automation in areas such as service discovery, composition, mediation, ranking and invocation. This paper applies SWS to a previous protocol adapter which, operating within clearly defined constraints, maps SOAP Web Services to RESTful HTTP format. However, in the previous adapter, the configuration element is manual and the latency implications are locally based. This paper applies SWS technologies to automate the configuration element and the latency tests are conducted in a more realistic Internet based setting.