Research And Realization Of Mobile Emergency System Development Framework Driven By Message Flow

With the development of technology in mobile communication field and theimprovement of the performance of handheld devices, various portable mobiledevices have been stepping into people’s daily life. Accordingly, the requirement formobile applications has been increasing greatly. In the field of office automationsystem, there are amount of desk application needing to develop the correspondingmobile application to meet requirements of mobile officing.The transplantation of desktop office automation system to mobile applicationfaces lots of common problems. First of all, they have similar user interfaces. Listinterfaces and entity interfaces are used in most of mobile OA applications. Secondly,they have a similar data transmission module. Applications based onC/S(Client/Server) mode need to solve the problem of data transmission. In the designof mobile applications, we should pay more attention on data transmission. That’sbecause the network environment on mobile devices is really poor compared withdesktop system. Thirdly, the original desktop system usually has its own database fileand can provide database connections for mobile system. The mobile system shoulduse these connections for compatibility. Then there is a requirement of the conversionfrom the data table structure to entity class. Aiming at these problems, this paperpresents a mobile development framework and realizes a mobile emergency systemdriven by message flow based on the framework.The mobile development framework presented by this paper consists of the clientmodule, the server module and the data transmission module. The client modulerealizes the self-defined list control and entity control. The entity control uses thereflection technology and annotation of JAVA. In addition, the client module alsoprovides the function of data transmission management and the service of automaticupdating. The server module uses Nhibernate to realize the mapping between thedomain model and the data table structure data. The data transmission module realizes a persistence connection between the client and the server. The persistence connectionis used for pushing messages from the server to clients.On the base of establishing mobile development framework, this paper realizes amobile emergency system. The emergency system is used to deal with unexpectedtragic events. It can share the text and multimedia information between users.According to the demand of the emergency system, when emergencies occur, theclient module should have the capability of obtaining information in first time.