Creation, integrating and deployment of diagnoser for web services

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http://eprints.org/relation/isVersionOf http://etheses.bham.ac.uk/id/document/18268 http://eprints.org/relation/isVolatileVersionOf http://etheses.bham.ac.uk/id/document/18268 http://eprints.org/relation/ispreviewThumbnailVersionOf http://etheses.bham.ac.uk/id/document/18268 archive 4031 disk0/00/00/31/81 2012-02-09 12:17:17 2019-01-23 09:55:43 2012-02-09 12:17:16 thesis show 0 Alodib Mohammed Ibrahim Bordbar Behzad University of Birmingham Creation, integrating and deployment of diagnoser for web services unpub Q1 QA75 QA76 10col_ephy Option C extended until December 2017 at author's request, 5 Feb 2015, JR. (Full text has been OA between July 2014 and Feb 2015). Author confirmed OK to leave copy available via EThOS, so any copy requests could be redirected to EThOS. Service oriented Architecture (SoA) is a layered architecture for organising software resources as services, so that they can be deployed, discovered and combined to produce new Web services. One of the key challenges of SoA is in identifying the occurrence of failures that may result in violations of Service Level Agreements, causing financial penalties or customer dissatisfaction. Therefore, it is crucial to develop methods of on-line detection of failure to take suitable remedial actions without delay. One of the methods of identifying occurrences of failure is to use Diagnosers; software modules which are deployed with the system to monitor the interaction between the services. This thesis presents a diagnostic approach for SoA based on extending the Diagnosability theory of Discrete Event System (DES). In particular, this research has resulted in a method of automated creation of Diagnosers and integrating them to the system. This is accomplished by coming up with an appropriate modelling language framework, which is a prerequisite to applying DES techniques. Modelling languages popular in DES, such as Petri nets and Automata, despite being sufficiently adequate for modelling, are not well adopted by the SoA community. Inspired by Petri nets and Workflow Graphs, a modeling approach, which closely follows BPEL, is proposed. Then, one of existing DES methods is extended for the creation of centralised Diagnoser. Various methods are proposed to implement and integrate the produced Diagnoser into the system. As a proof of concept, an implementation of the suggested approach is created as a Plugin for Oracle JDeveloper. A series of empirical results on the performance-related aspects of the proposed method are discussed. 2011-12 2011-04 graduation eng author This unpublished thesis/dissertation is copyright of the author and/or third parties. The intellectual property rights of the author or third parties in respect of this work are as defined by The Copyright Designs and Patents Act 1988 or as modified by any successor legislation. Any use made of information contained in this thesis/dissertation must be in accordance with that legislation and must be properly acknowledged. Further distribution or reproduction in any format is prohibited without the permission of the copyright holder. Government of Saudi Arabia public 171 University of Birmingham School of Computer Science d_ph FALSE other 2011-12 graduation