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@PHDTHESIS{Vandikas:463955,
      author       = {Vandikas, Konstantinos},
      othercontributors = {Jarke, Matthias and Papazoglo, Mike and Prinz, Wolfgang},
      title        = {{A} fine-grained approach towards asynchronous service
                      composition of heterogeneous services},
      school       = {Aachen, Techn. Hochsch.},
      type         = {Diss.},
      address      = {Aachen},
      publisher    = {Publikationsserver der RWTH Aachen University},
      reportid     = {RWTH-CONV-207049},
      pages        = {XVII, 255 S. : Ill., graph. Darst.},
      year         = {2015},
      note         = {Aachen, Techn. Hochsch., Diss., 2014},
      abstract     = {In software design, a service-oriented architecture is a
                      set of principles and methodologies used for designing and
                      developing software in the form of interoperable services.
                      Each service encapsulates well-defined business
                      functionality and it is built as a reusable component.
                      Thereafter, new services can be generated as a coordinated
                      aggregate of pre-existing functionality by means of service
                      composition. Common practice in the Information and
                      Communication Technology domain (ICT) is the usage of
                      standardized workflow languages in order to describe the
                      interaction between such services. Examples of such
                      languages are the Web Services Business Process and
                      Execution Language (WS-BPEL) and the Business Process
                      Modeling Language (BPMN). At runtime, a framework interprets
                      the workflow and performs the actions mandated by the
                      semantics of its constructs. Even though, a workflow
                      language contains a sufficient amount of constructs to
                      qualify as Turing complete, the usage of existing workflow
                      languages along with their corresponding frameworks renders
                      them cumbersome for rapid application development where one
                      needs to combine services from heterogeneous domains and in
                      particular when re-using pre-existing services originating
                      from the telecommunications domain. More specifically, the
                      limitations in the state of the art for workflow languages
                      are encountered in aspects such as tight-technological
                      coupling; interaction is limited to particular technologies,
                      usage of static type systems - that hinder experimentation
                      and finally yet importantly in terms of parallelism and
                      concurrency, where the designer of a workflow is forced to
                      manually define execution order in an attempt to utilize
                      multiple cores which are commonly found in most computer
                      systems nowadays. This dissertation introduces a novel
                      language for service composition and a technology agnostic
                      composition framework suitable for developing and executing
                      service compositions of heterogeneous services. The proposed
                      service composition language is concurrent by default;
                      parallel execution of actions is determined by their
                      corresponding data dependencies. The proposed framework
                      allows for an optional type system permitting both typed and
                      un-typed variables. Un-typed variables can be used while
                      designing and experimenting with the composition in a trial
                      and error fashion; while typed can be used once the model of
                      the service composition matures and becomes
                      production-ready. Moreover, the proposed composition
                      framework employs a fine level of granularity while
                      interpreting the constructs of the proposed language. Our
                      qualitative evaluation of the proposed language has shown
                      that it is capable of expressing a wide set of workflow
                      patterns, making it as expressive as rival workflow
                      languages. Empirical evaluations of the proposed
                      fine-grained composition framework have shown that is
                      scalable; limited only by the amount of available memory and
                      not by the number of available processing threads.},
      keywords     = {Serviceorientierte Architektur (SWD) / Prozessmanagement
                      (SWD) / Formale Semantik (SWD) / Multithreading (SWD) / SIP
                      $\<Kommunikationsprotokoll\>$ (SWD) / Dienstekomposition
                      (SWD)},
      cin          = {121920 / 120000 / 121810},
      ddc          = {004},
      cid          = {$I:(DE-82)121920_20140620$ / $I:(DE-82)120000_20140620$ /
                      $I:(DE-82)121810_20140620$},
      typ          = {PUB:(DE-HGF)11},
      urn          = {urn:nbn:de:hbz:82-opus-53372},
      url          = {https://publications.rwth-aachen.de/record/463955},
}