Method for controlling retention of publications and publication/orderation agent

Abstract

For managing the retention of publications in a publish / subscribe system, a publisher sends a new publication to a publish / subscribe broker with an indication of whether the new publication should be retained in association with a previous retained publication. The publish / subscribe broker responds to such indications by retaining the new publication with the previous retained publication. The contents or 'payload' of the new published message may be appended to a previous retained message, resulting in a single retained message that contains information from multiple published messages.

Description

technical field [0001] The present invention relates to communication and data storage management within a data processing network, and more particularly, the present invention provides apparatus, methods and computer programs for controlling the retention of messages in a publish / subscribe messaging environment. Background technique [0002] In a messaging network, messages may be passed from one data processing system to another via one or more "message brokers" that provide routing and, in various cases, transformation and other services. Although broker functions can be implemented at various points within a distributed broker network, brokers are typically located at communication hubs within the network. [0003] Several message brokers support the publish / subscribe communication paradigm. This involves a publisher sending a communication that can be received by a set of Subscribers that have registered their interest in receiving that type of communication, the publi...

AI Technical Summary

Problems solved by technology

However, relying on predetermined quantities is inflexible, and there is still the problem of how to decide on an appropriate value of N (balancing storage overhead versus the benefit of keeping publications to new orderers)

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