Self-organizing broker topologies for publish/subscribe systems
Proceedings of the 2007 ACM symposium on Applied computing
P/S-CoM: Building correct by design Publish/Subscribe architectural styles with safe reconfiguration
Journal of Systems and Software
Design and implementation of the Rebeca publish/subscribe middleware
From active data management to event-based systems and more
Consistent reconfiguration for publish/subscribe architecture styles
VECoS'07 Proceedings of the First international conference on Verification and Evaluation of Computer and Communication Systems
Formal design of structural and dynamic features of publish/subscribe architectural styles
ECSA'07 Proceedings of the First European conference on Software Architecture
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Distributed content-based publish/subscribe systems are usually implemented by a set of brokers forming an overlay network. Most existing publish/subscribe middleware assumes that the overlay topology is static. Those that consider reconfiguration, exchange a single link that is torn down by another link that comes up. However, they do not guarantee that no notifications are lost or duplicated nor do they ensure any message ordering policy. In this paper, we discuss the dynamic reconfiguration of publish/subscribe systems which are built on content-based routing. We present algorithms that allow for reconfigurations without notification loss or duplication that can also ensure FIFO-publisher and causal ordering. Moreover, the efficiency of reconfigurations is increased by limiting their effects to those parts of the network which are directly affected by the reconfiguration.