The research of efficient publishing of subscription system

This article discusses a system in detail. The design and implementation of an efficient subscription system is based on the PC. In a publishing subscription system, the subscription is represented by a Boolean expression. When the data is published by the master, the data owner publishes an event that corresponds to the data. When the data event matches the subscription Boolean expression, the data is sent to the user who subscribes to the data. Publishers publish data for this operation by using the conjunction index. The matching results are given automatically by the system. The system has a clean interface and simple operation. It is easy to maintain later.