A Cloud Portal Architecture for Large-Scale Application Services

Application services entail multi-billion dollars of market in IT industry. However, to construct an application service is a laborintensive and errorprone process. Application services developed through traditional development methods expose the same pitfalls witnessed in most development processes of enterprise applications such as late delivery, over budget, unpredictable quality, lack of reuse and so forth. We have leveraged clouds in developing application services within the context of large corporate with the magnitude of thousands of application services being built, delivered and used. Instead of using cloud simply for a better runtime engine, it is being used as the development platform to accelerate and optimize the solution development process based on large scale application services. This article will focus on the portal architecture of this framework— coined as Cogito-C that contains four spaces: (a) infrastructure space; (b) application space; (c) business space; and (d) presentation space. This article illustrates Cogito-C by scrutinizing the models in the aforementioned spaces. This article will focus on the descriptive models of this framework. Examples are used to explain how this framework is organized and exploited for large-scale application services.