Fine-grained metrics of cohesion lack for service interfaces

Dionysis Athanasopoulos*, Apostolos V. Zarras

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference contribution

14 Citations (Scopus)


A design issue that often appears in real-world services is that their interfaces are not cohesive, i.e., they consist of many and possibly unrelated operations. This issue may complicate the comprehension of the services functionalities and the maintenance of the applications that use them. Currently, the state of the art on case studies that focus on the evaluation of the cohesion of services offered by major service providers is limited, while research efforts on corresponding cohesion metrics are at a quite early stage. In particular, there exist coarse-grained metrics of cohesion lack, which consider that the operations of a service interface are related if the types of certain of their input/output data exactly match. The problem in this approach is that operations which operate on data characterized by similar, but not exactly matching, types are treated as being totally unrelated. Consequently, the aforementioned metrics may overestimate the cohesion lack of service interfaces. In this paper, we undertake a more elaborate approach to evaluate a set of real world services provided by Amazon. Specifically, we propose two fine-grained metrics of cohesion lack, which are defined with respect to the structural similarity of the input/output data types of interface operations. The proposed metrics are formally defined and analytically assessed with respect to fundamental properties of software metrics. Finally we report the results from our case study.

Original languageEnglish
Title of host publicationProceedings - 2011 IEEE 9th International Conference on Web Services, ICWS 2011
Number of pages8
Publication statusPublished - 29 Sep 2011
Externally publishedYes
Event2011 IEEE 9th International Conference on Web Services, ICWS 2011 - Washington, DC, United States
Duration: 04 Jul 201109 Jul 2011


Conference2011 IEEE 9th International Conference on Web Services, ICWS 2011
Country/TerritoryUnited States
CityWashington, DC


  • Cohesion
  • Communicational
  • Interface
  • Sequential
  • Service

ASJC Scopus subject areas

  • Computer Networks and Communications


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