An Approach to Web Service Dynamic Replacement

Gong, Yadong; Huang, Lin; Jiang, Fan; Han, Ke

doi:10.14257/ijgdc.2014.7.1.01

Cited by 2 publications

(1 citation statement)

References 17 publications

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“…Dynamic service environments cause some difficulties in service selection [11]. Two important factors are considered, i.e., functional requirement and QoS to find the suitable new WS [12]. The SP is conducted at the pre-adaptation stage of dynamic reconfiguration process with four main steps: ii.…”

Section: Figure 1 Drews Modelmentioning

confidence: 99%

Middleware-based Model for Dynamic Reconfiguration of Web Service

Ilahi¹,

Admodisastro²,

Ali³

et al. 2018

IJGDC

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Dynamic reconfiguration of web services (WSs) is a method to replace WSs in serviceoriented architecture (SOA) software system during runtime. The method allows the service requester to replace WSs in their system without interruption of other operations in the system. However, dynamic reconfiguration is a difficult process and attempts to handle the process appropriately are still lacking. In this paper, we propose a middleware-based model to improve SOA dynamic reconfiguration service process during runtime. The model is used as the main standard to outline the dynamic reconfiguration of WSs that can handle quality of service (QoS) requirements and to provide explicit mechanism during pre-, in-, and post-adaptation stages. A self-adaptive tool was developed based on the model to support the dynamic reconfiguration of WSs with minimum human intervention. Finally, an evaluation using an experiment is conducted to evaluate the effectiveness of the model. The evaluation results show that the model supported the dynamic reconfiguration of WSs effectively.

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Section: Figure 1 Drews Modelmentioning

confidence: 99%

Middleware-based Model for Dynamic Reconfiguration of Web Service

Ilahi¹,

Admodisastro²,

Ali³

et al. 2018

IJGDC

View full text Add to dashboard Cite

show abstract

Redundancy-Based Reliability Enhancement for Composite Services

Wang

Chu

et al. 2014

International Journal of Web Services Research

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Reliability is a key performance indicator of distributed service systems. On the condition that a customer raises a demand with a very strict reliability, it is possibly difficult for a service broker to offer a composite service that fully satisfies the reliability expectation. In the real world, the customers would like to pay extra money to assure the successful execution of a composite service, and the brokers usually adopt a redundancy-based mechanism to enhance the reliability of the composite service. The authors consider two scenarios of reliability enhancement: (1) a composite service exists but its reliability fails to meet the expectations of customers; and (2) no composite services exist yet, but it is known that the expected reliability is too high to be met. To handle them, the authors propose the RE-ECS and RE-PLN algorithms, respectively, in which three heuristic rules are proposed and the Artificial Bee Colony (ABC) algorithm are adopted to find an approximate optimal trade-off between the improvement extent and the total cost of the reliability enhancement. The authors use two traditional redundancy strategies (i.e., sequential and parallel) for enhancing the reliability a single service task, and a new redundancy strategy called path redundancy for extending a new path into a composite service to improve the global reliability. Nine experiments are conducted and some factors having potential influences on the effect, cost, and efficiency of the reliability enhancement are analyzed. This work is of significance for service brokers to build and enhance their composite services to satisfy those strict expectations on reliability.

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An Approach to Web Service Dynamic Replacement

Abstract: Abstract

Cited by 2 publications

References 17 publications

Middleware-based Model for Dynamic Reconfiguration of Web Service

Middleware-based Model for Dynamic Reconfiguration of Web Service

Redundancy-Based Reliability Enhancement for Composite Services

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