| |
[Download PDF here!]
Authors: David S. Wile and Alexander
Egyed
Software architecture descriptions can
play a wide variety of roles in the software lifecycle, from requirements
specification, to logical design, to implementation architectures. In
addition, execution architectures can be used both to constrain and enhance
the functionality of running systems, e.g. security architectures and
debugging architectures. Along with others from DARPA's DASADA program we
proposed an execution infrastructure for so-called self-healing,
self-adaptive systems - systems that maintain a particular level of
healthiness or quality of service (QoS). This externalized infrastructure
does not entail any modification of the target system - whose health is to
be maintained. It is driven by a reflective model of the target system's
operation to determine what aspects can be changed to effect repair. Herein
we present that infrastructure along with an example implemented in accord
with it.
|
|