Researches On Distributed Asynchronous Message Processing Based On WCF

With the rapid development of Local Area Networks and the Internet, distributed communication technology has become a hot spot of distributed technology at the present.Distributed asynchronous message processing is such a process that a sender will continue to work after sending a request message to a receiver no matter whether being responded or not,and the receiver will handle the request message in an asynchronous mode in the distributed communication environment.Distributed asynchronous message processing has solved the bottleneck problem caused by excessive concurrent request from the senders,and it has always realized the load balance.The main researches of the thesis are in the following areas:Firstly,the thesis studies several typical distributed communication techniques in.NET framework,and has carried out a comparative analysis of the basic structure and application scenarios of such techniques.The asynchronous message transfer mode of Microsoft Message Queuing(MSMQ) is discussed,and the communication architecture and asynchronous message processing mechanism of Windows Communication Foundation(WCF),which is a new generation communication technique in.NET3.0 framework,are analyzed.Secondly,to deal with the existing communication instability of GPRS network and the network overload of distributed communications,the thesis designs a new Asynchronous Message Processing(AMP) and communication model,based the asynchronous message process mechanism of WCF.The AMP communication model supported by MSMQ can process message according to the priority asynchronously.Compared with the traditional modes of communication systems, the AMP communication model can improve the server's responding speed in time consumption and solve the retransmission problem in the unstable communication environment of GPRS.Thirdly,the AMP communication model is applied to the network meter communication system.To make gas meter data always accessible,Network Gas Meters are introduced.With the use of GPRS network,the network meter communication system can access the gas meter data in time and realize a real-time control of the gas meters.Using object-oriented technology,the main modules and command-frame classes of the AMP communication model have been implemented successfully in.NET3.0 framework.Then,in the multi-layered development of the server,the network meter communication system uses the AMP communication model.At present,the AMP communication model has been used in the network meter communication system.The experiments show that the application of AMP communication worked well,and it gets the anticipated purpose.