Supporting synchronous and asynchronous communications in event-based communication framework for client-server applications

1.Introduction Developers of distributed applications can implement communication functionalities from the scratch, but it is more efficient for them to use services provided by communication middleware or framework. Although previous work [1, 2] of the proposed scheme, existing general communication middleware’s [3−7], middleware’s for online social networks [8−12], and other recent middleware’s [13−15] provide generic or application-specific communication services, they do not support both the synchronous and asynchronous communications. Communication between a client and a server that existing approaches use is not determined by application requirements, but by their internal ways of communication channel management or kinds of services. Thus, if an application selects a middleware or a service, it also uses a fixed communication method between the client and the server.