Emerging Patterns in Adaptive, Distributed
Real-Time, Embedded Middleware
Citation:
Loyall JP, Rubel Paul, Atighetchi M, Schantz R, Zinky J. Emerging Patterns in
Adaptive, Distributed Real-Time, Embedded Middleware. OOPSLA 2002 Workshop -
Patterns in Distributed Real-time and Embedded Systems, November 5, 2002,
Seattle, Washington.
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Abstract
Distributed real-time embedded (DRE) applications
often have strict quality of service (QoS) requirements and are frequently
deployed in environments in which resources are severely constrained, hostile
conditions are prevalent, and resource contention is dynamic and unpredictable.
For DRE applications to reliably operate in these environments, they must be
able to measure the conditions of the system and adapt to recover from
undesirable situations and to best utilize available resources. This paper
presents two patterns that describe solutions appropriate to the problems of
QoS adaptive applications: a QoS contract
pattern for managing adaptive decisions and tradeoffs and a snapshot pattern
for grabbing a useful approximation of the current state of a system.
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