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Direct RIA: Future of RIA
More choices, difficult decision
Though enterprises can benefit from Rich Internet applications, adopting new technologies can also introduce risk. The first problem is how to choose the right solution as it is easy to make a wrong decision because of too many choices, unclear criteria, and complex requirements.
Productivity or Controllability
RIA solutions can be generally classified into two categories - client centric or server-centric. Client-centric frameworks are like manually transmission car which provide more control, but requires more effort. Unlike client-centric frameworks, server-centric frameworks are like auto transmission cars which is easy, thus, they can boost developer's productivity by making AJAX technology transparent to developers. But, which to choose remains a headache. Full control or productivity? Can we benefit from both of them at the same time? The best case is that they can choose either way to satisfy different requirements like manually auto-transmission car!
Direct RIA = client+server fusion approach
Architecture Overview of Direct RIA
However, one of the major disadvantages of pure server-centric programming model is that developers cannot fully control the presentation of user interface. To overcome this issue, Direct RIA enables an optional client-side programming model that enables developers to write client code to control the user interface directly if necessary.