A Context-Aware Reflective-State Framework to Reconfigure Service-Based Applications

Service-based applications (SBA) offer flexible functionalities in wide range of environments. Therefore, they should be able to dynamically adapt to different quality concerns such as security, performance, etc. For example, we may provide secure services for the specific partners, or change SBA configuration based on context information. In this paper, we present context models and fuzzy logic controllers to reconfigure SBA at runtime. To separate the control aspects of SBA from its functionalities and maintain the states of SBA, we used Reflective-state pattern. Whenever context information changes, the violated SBA instances enter the adaptation process and the control unit takes care of analyzing and selecting possible variants in the corresponding points. We used Jmeter load simulator and Zabbix monitoring system to measure the performance improvement in our framework. Additionally we characterized our work in comparison with related studies, according to S-CUBE adaptation taxonomy.