Hauck, Franz J. ;
Becker, Ulrich ;
Geier, Martin ;
Meier, Erich ;
Rastofer, Uwe ;
Steckermeier, Martin
:
AspectIX.
Erlangen:
FAU.
1998
TR-I4-98-08.- Interner Bericht.
8 Seiten.
Stichwörter:
Middleware, CORBA, AspectIX
Abstract:
The CORBA architecture defines the semantics of the interaction of
distributed objects. These semantics are fixed and hardly extensible.
CORBA services can extend the basic functionality of an ORB, but they
are based on those fixed semantics.
AspectIX is an open and more flexible architecture than CORBA, but an
AspectIX implementation can also host CORBA-compliant applications.
AspectIX adopts a fragmented object model, which means that each client
owns a local part of the distributed object and that these local parts,
called fragments, can interact with one another. A local fragment can
be intelligent and carry a part of the distributed object's
functionality, or it can be dumb and act as a stub only, as in the
CORBA-compliant AspectIX profile.
A client can configure several functional and nonfunctional properties
of the object's semantics, so-called aspects, by using a generic
configuration interface. A local fragment implementation may be
transparently replaced by another one if it cannot fulfill the
requirements of a new configuration. We will show how this
configuration interface helps to solves problems in wide-area systems
(replication, consistency), mobile agents (mobility), and process
control systems (real-time constraints, fault tolerance).
