Transmission method for publish/subscribe system based on NIO and IO

Abstract

The invention relates to a transmission method for a publish / subscribe system based on NIO and IO, comprising the following steps: a thread that uniquely receives socket connection is started to use by using NIO at a server terminal, wherein the receiving thread comprises Selector objects, thread reading groups and thread writing groups; the Selector objects capture various events from a client, and the thread reading groups and thread writing groups are used for receiving socket connection from the client and writing data to the client; each thread reading or writing thread corresponds to a socket connection respectively and packages the received socket every time to form an object to read and write data and then registers the object to the unique Selector object. When the client is shutdown, the connection is logged out from the reading and writing threads, and after logout, the reading and writing threads can bind novel connections. The invention has the advantages that thread number is reduced by using NIO at the server terminal based on the mixed use of IO and NIO of java, thereby reducing the resource consumption; and the server terminal is connected at the client by using IO so that the speed for sending send messages can be improved greatly.

Description

technical field [0001] The invention relates to the field of data transmission, and mainly relates to a transmission method for a publish-subscribe system based on NIO and IO. Background technique [0002] Publish / subscribe (publish / subscribe, referred to as pub / sub) system is a distributed middleware system, which is a technology that emerges with complex and large-scale network computing. Provide a loosely coupled communication method. In a large-scale, highly dynamic distributed system, participants usually change dynamically in time and space. Participate in message interaction and collaborative work in a coupled way. The loosely coupled nature of the publish / subscribe system can just solve this problem. [0003] like figure 1 As shown, a publish / subscribe system generally consists of a message producer (publisher), a message consumer (subscriber) and an event notification service. In a publish / subscribe system, messages are usually called "events". Message producer...

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Problems solved by technology

However, since the poll polling operation is an uninterrupted process, it is the underlying API provided by Sun, which cannot be modified

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