Generating service models by trace subsequence substitution

  • Authors:

  • Miao Du;Jean-Guy Schneider;Cameron Hine;John Grundy;Steve Versteeg

  • Affiliations:

  • Swinburne University of Technology, Hawthorn, VIC 3122, Australia;Swinburne University of Technology, Hawthorn, VIC 3122, Australia;Swinburne University of Technology, Hawthorn, VIC 3122, Australia;Swinburne University of Technology, Hawthorn, VIC 3122, Australia;CA Labs, Melbourne, VIC 3004, Australia

  • Venue:
  • Proceedings of the 9th international ACM Sigsoft conference on Quality of software architectures
  • Year:
  • 2013

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Abstract

Software service emulation is an emerging technique for creating realistic executable models of server-side behaviour and is particularly useful in quality assurance: replicating production-like conditions for large-scale enterprise software systems. This allows performance engineers to mimic very large numbers of servers and/or provide a means of controlling dependencies on diverse third-party systems. Previous approaches to service emulation rely on manual definition of interaction behaviour requiring significant human effort. They also rely on either a system expert or documentation of system protocol and behaviour, neither of which are necessarily available. We present a novel method of automatically building client-server and server-server interaction models of complex software systems directly from interaction trace data, utilising longest common subsequence matching and field substitution algorithms. We evaluate our method against two common application-layer protocols: LDAP and SOAP. The results show that without explicit knowledge of the protocol specifications, our generated service models can produce well-formed responses for interactions. These responses can then be used within an emulation framework for large-scale enterprise system quality assurance purposes.