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To satisfy the requirements of reliable Web services, the mechanism of adaptive failure detection for Web services in the dynamical network environment is studied. A framework of hierarchical failure detection is presented firstly, then an algorithm based on freshpoint and load awareness is presented. It considers the factors including the frequency of message delivering and the message loss probability...
A kind of personalization extension of Portal framework is studied. Based on the establishment of user pattern which can describe the characteristics of users' behaviors at runtime, a dynamical mechanism for Portiet composition driven by user pattern is presented, which is helpful for improving user experience. The prototypical experiments on the open-source Liferay framework verify the feasibility...
Thread pooling is an important technique of performance optimization in middleware. With the consideration of the features of Internet applications, the configuration of thread pool in middleware needs to be adjusted dynamically on the basis of perceiving the run-time context. However, how to find out effective influencing factors which make the adjustment to have better adaptability remains to be...
To meet the requirements of Wireless Sensor Networks (WSNs), a QoS guarantee mechanism based on service-oriented middleware is presented. Focus on the problem of quality of service (QoS) evaluation, a QoS evaluation algorithm based on a model of multi-dimension cloud is proposed. It evaluates quantitatively the tasks, which can make the network be scheduled properly by middleware according to the...
Dependability and adaptability are both the important issues of Web services. With the consideration of the features of Web services, an adaptive fault-tolerant mechanism is presented. It is based on a two-aspect context model including functional context and network context. Based on the context model, the paper designs an adaptive fault-tolerant framework for Web services, which involves in a series...
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