Refactoring Real-Time Java Profiles

Hans Søndergaard, Bent Thomsen, Anders Peter Ravn, Rene Rydhof Hansen, Thomas Bøgholm

Research output: Contribution to book/anthology/report/conference proceedingArticle in proceedingResearchpeer-review

3 Citations (Scopus)


Just like other software, Java profiles benefits from refactoring when they have been used and have evolved for some time. This paper presents a refactoring of the Real-Time Specification for Java (RTSJ) and the Safety Critical Java (SCJ) profile (JSR-302). It highlights core concepts and makes it a suitable foundation for the proposed levels of SCJ. The ongoing work of specifying the SCJ profile builds on sub classing of RTSJ. This spurred our interest in a refactoring approach. It starts by extracting the common kernel of the specifications in a core package, which defines interfaces only. It is then possible to refactor SCJ with its three levels and RTSJ in such a way that each profile is in a separate package. This refactoring results in cleaner class hierarchies with no superfluous methods, well defined SCJ levels, elimination of SCJ annotations like @SCJAllowed, thus making the profiles easier to comprehend and use for application developers and students.
Original languageEnglish
Title of host publicationObject/Component/Service-Oriented Real-Time Distributed Computing (ISORC), 2011 14th IEEE International Symposium on
Number of pages16
Publication date28 Mar 2011
Pages109 - 116
Publication statusPublished - 28 Mar 2011

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