The design of a configurable, extensible and dynamic notification service

Abstract

Publish/subscribe infrastructures, specifically notification servers, are used in a large spectrum of distributed applications as their basic communication and integration infrastructure. With their recent popularization, notification servers are being developed to support specific application domains. At the same time, generalpurpose notification servers provide a large set of functionality for a broad set of applications. With so many options, developers face the dilemma of choosing between application-specific or generalpurpose notification servers. In both cases, however, the set of features provided by the servers are usually neither extensible nor configurable, making their customization to specific application domains a difficult task. In this work, a more flexible approach is proposed -a customizable, extensible and dynamic architecture for notification services -which allows the customization of the notification service to different application domains. The extensibility model is presented according to the design framework proposed by Rosemblum and Wolf. A preliminary implementation of the prototype is also discussed, as well as configuration examples.

Intelligent creation of notification events in information systems

“…The second implementation is a solution using database triggers, manifesting both the determination of changes as well as the algorithm within the triggers. 3 Note that students are subscribers, so this is possible The sandbox application that has been used for evaluation of the two approaches uses the object-relational mapping technique of Hibernate 4 , so that the persistence layer is transparent to the developer. Although this may lead to a slight degradation of performance, it is very likely that such a technique will be used in real-life applications, so we considered it appropriate to use it in our experiments.…”

“…Considering the classification of Eugster et al [2], our approach belongs to the class of content-based systems. In the extensible architecture proposed by Filho et al [3], our enhanced events could be handled between the event input buffer and the event dispatcher, being part of both object model and event model, as identified by Rosenblum and Wolf [4].…”

Two experiences designing for effective security

“…YANCEES (Silva Filho et al, 2003) is an open infrastructure for event-based publish/subscribe distributed architectures. Eventbased infrastructures provide an effective mechanism for flexible, loosely-coupled distributed systems integration.…”

Towards an architectural treatment of software security

“…The secure WebDAV connector and the YANCEES [13] event notification connector connect these components together. The architecture is depicted in Figure 2 …”