Publishing and subscription method capable of supporting message duration

Abstract

The invention discloses a publishing and subscription method. A publisher produces an advertisement message and forwards the advertisement message to the whole network; each proxy node produces a route table based on an advertisement theme; a subscriber produces a subscription message and routes the subscription message to the publisher of the relevant theme according to a route produced by the route table based on the advertisement theme; each node produces a route table based on a subscription content; the message published by the publisher is routed to the subscriber according to the route table based on the subscription content; furthermore, during routing, the message is cached into a certain proxy node on a deliver route and is marked as cached; the subscriber sends a historical message subscription which is routed to the publisher with the corresponding theme according to the route table based on the advertisement theme; historical messages meeting a subscription condition are searched along the deliver route; and the searched historical messages are turned to the subscriber along an opposite route. By the publishing and subscription method, the problem that a user cannot acquire the historical messages in a publishing / subscription system is solved; and the historical messages can be searched quickly and reliably.

Description

technical field [0001] The invention relates to the network field, in particular to a publish-subscribe method supporting message persistence. Background technique [0002] With the wide application of Internet technology and the rapid development of mobile computing, ubiquitous computing and Internet technology, the current distributed system may contain thousands of nodes, and these nodes may be distributed in different geographical locations, have different behaviors. These limitations make distributed systems need more flexible communication models to accommodate this dynamic and extensibility. With its characteristics of loose coupling and asynchronous communication, the publish / subscribe system has gradually become an important architecture for designing distributed systems, and is considered to be one of the most promising network architectures that can solve many challenges of the Internet today. [0003] The publish / subscribe system includes a set of clients (Clie...

AI Technical Summary

Problems solved by technology

[0005] The purpose of the present invention is to provide a publish-subscribe method that supports message persistence to solve the technical problem that users cannot obtain historical messages in the existing publish / subscribe system

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