Research Of The Evaluation Method Of Credibility Of The Software System Based-on SOA

With the rapid development of computer and Internet technology, especially inrecent years, the amount of data and the number of Internet users rapid expansion, Theinvestigation defects of coupling, maintainability and scalability of Traditional softwaresystem appear gradually, SOA-based software system is able to deal with this situationmuch better, and SOA can support cloud computing, along with the rise of cloudcomputing, SOA application prospects will be even brighter. However, because of theopenness of SOA-based Software System Development, its credibility has beenquestioned. The method to evaluate its credibility is attention.The paper studies the background and current status of the SOA, after-depth studyof the current domestic and international credibility of the evaluation method of thesoftware system. SOA system-oriented is loosely coupled, noted the features ofrelatively independent between different services, this paper use Markov model for SOAsoftware system modeling, by the credibility of the composition of services and itsprobability of occurrence, provide a more accurate method to calculate the credibility ofthe entire system, and verify the correctness with the case of “single domain” as well as"multi-domain". The main contents are as follows:(1) Study the characteristics of SOA and Markov model deeply, and found theintrinsic link between of which. Analysis the feasibility of modeling with Markovmodeling, and the SOA algebra model is given. Based on actual experience, the form ofdifferent combinations between the various services is given, and defined.(2) On the basis of understanding the SOA, according to the related technology,design and implement two SOA applications software system instance, in line with the“single-domain” and “multi-domain”, which ensure the credibility evaluation to verifythe method above.(3) With the examples above, evaluate the credibility of SOA software system intwo cases, verify the correctness of the SOA software system dependability evaluationmethod, and finally concluded, the credibility of system services portfolio or the entiresystem can be calculated by the credibility of the evaluation of the components of the system.