Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter
Research output: Contribution in Book/Report/Proceedings - With ISBN/ISSN › Chapter
}
TY - CHAP
T1 - Supporting dependable distributed applications through a component-oriented middleware-based group service
AU - Saikoski, K
AU - Coulson, G
PY - 2004
Y1 - 2004
N2 - Dependable distributed applications require flexible infrastructure support for controlled redundancy, replication, and recovery of components and services. However, most group-based middleware platforms, which axe increasingly being used as implementation environments for such systems, fail to provide adequate flexibility to meet diverse application requirements. This paper presents a group-based middleware platform that aims at maximal flexibility. In particular, flexibility is provided at design time, deployment time and run-time. At design and deployment time, the developer can configure a system by assembling softwaxe components shaped to a specific use. Then, at run-time, s/he can dynamically reconfigure the resulting system to adjust it to new circumstances, or can add arbitrary machinery to enable the system to perform self-adaptation. As examples, levels of fault tolerance can be dynamically increased and decreased as desired by adding, removing or replacing replicas; or the underlying communications topology can be adapted by switching from point-to-point TCP to multicast as numbers of replicants increase. Importantly, it is not necessary that the shape that run-time reconfiguration takes has been foreseen at design or deployment time. Our proposed solution employs softwaxe component technology and computational reflection as the basic means by which to perform and manage configuration and reconfiguration.
AB - Dependable distributed applications require flexible infrastructure support for controlled redundancy, replication, and recovery of components and services. However, most group-based middleware platforms, which axe increasingly being used as implementation environments for such systems, fail to provide adequate flexibility to meet diverse application requirements. This paper presents a group-based middleware platform that aims at maximal flexibility. In particular, flexibility is provided at design time, deployment time and run-time. At design and deployment time, the developer can configure a system by assembling softwaxe components shaped to a specific use. Then, at run-time, s/he can dynamically reconfigure the resulting system to adjust it to new circumstances, or can add arbitrary machinery to enable the system to perform self-adaptation. As examples, levels of fault tolerance can be dynamically increased and decreased as desired by adding, removing or replacing replicas; or the underlying communications topology can be adapted by switching from point-to-point TCP to multicast as numbers of replicants increase. Importantly, it is not necessary that the shape that run-time reconfiguration takes has been foreseen at design or deployment time. Our proposed solution employs softwaxe component technology and computational reflection as the basic means by which to perform and manage configuration and reconfiguration.
KW - Communication Services
U2 - 10.1007/978-3-540-25939-8_5
DO - 10.1007/978-3-540-25939-8_5
M3 - Chapter
SN - 978-3-540-23168-4
T3 - Lecture Notes in Computer Science
SP - 270
EP - 293
BT - Architecting Dependable Systems II
A2 - de Lemos, Rogério
A2 - Gacek , Cristina
A2 - Romanovsky, Alexander
PB - Springer Verlag
CY - Berlin
T2 - Workshop on Algorithms and Data Structures
Y2 - 30 July 2003 through 1 August 2003
ER -