Empirical evaluation of design patterns for publisher-subscriber distributed systems.

摘要

Distributed Real-time Embedded systems have stringent quality of service (QoS) requirements for throughput, latency, and scalability, as well as requirements for a flexible communication infrastructure to reduce software lifecycle costs. The Publisher/Subscriber architecture provides a flexible model for asynchronous communication among distributed and collocated objects. Though much research has gone into the applicability of this architecture to DRE systems its adoption has been slow and it is still received with skepticism by the practitioners in the field. Furthermore, standards-based implementations of the Publisher/Subscriber architecture often lag behind the research on the field, increasing the difficulty to speed up its adoption.; This dissertation makes four contributions to the design, implementation and performance measurement of DRE systems. First, it describes key patterns used to implement scalable, predictable and high-performance Publisher/Subscriber architectures. Second, it illustrates how to implement such architectures using standards-based technology, such as CORBA. Third, it empirically evaluate different implementation strategies and contrasts their trade-offs. Finally, it demonstrates how common design patterns can be used to provide developers with flexible Publisher/Subscriber systems, where the trade-offs of different implementation strategies can be selected at application configuration time.