| Abstract |
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In the development of many software systems, the focus was on
functionality. When these systems begin to be used in situations
requiring higher reliability and availability, such qualities must be
retrofitted into the system. This paper considers way of adding
such capability to existing software by taking advantage of
aspect-oriented programming, recently developed technology
which supports encapsulation of non-functional concerns. The
paper introduces the notion of system health index as measure
of the internal system well-being, and identifies number of health
indictors, i.e. operational metrics from which health index could
be derived. The paper then discusses inspect-oriented
implementation of health indicators and lists several applicable
aspect-oriented design patterns. Experience obtained from the
implementation of health indicators in distributed system whose
original development focused only on functionality is then
summarized. The experience suggests that the time and space
overhead and development costs are moderate, and that there
is distinct advantage to the aspect-oriented implementation of
health indicators.
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 Additional Information
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Citation:
James Thai, Barry Pekilis, Alexander Lau, Rudolph Seviora,
"Aspect-Oriented Implementation of Software Health Indicators,"
apsec,
p. 97,
Eighth Asia-Pacific Software Engineering Conference (APSEC'01),
2001
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