Cloud Services Provider

Abstract: Context: Cloud computing as next generation computing paradigm has been accepted widely with growing-up of Internet technology and success of World Wide Web, which has the potential to transform a large part of IT industry, making software more attractive and even change the way IT product is designed and purchased. Cloud computing is all about services of various levels based upon Internet or Intranet including Software-as-a- Service (SaaS), Platform-as-a-Service (PaaS) and Infrastructure-as-a-service (IaaS). The most wonderful part of what's happening around the web and cloud computing is being able to expose data in a very pervasive, scalable and uniform way. Enterprises around the world can expose their data through web services loose-coupling and efficiently, in which way we can build more powerful and interesting applications once data is liberated from different organizations. WS-' and REpresentational State Transfer (REST) as two dominant integration methodologies are supporting implementation of those web services, which is being used to supply widespread cloud services . Objective & Method: This paper introduces a design-oriented case study with objective of evaluating new integration technology REpresentational State Transfer (REST) and how to design and development RESTful web services on Software-as-a-Server (SaaS) in the cloud environment based on evaluation from software architecture‘s perspective. In addition to, the paper presents security solution for RESTful Web services as well as some critical decisions and main concerns for implementation of successful and real RESTful web services. Meanwhile, the paper reports on literature study about cloud computing and theoretical comparison between two integration methodologies – REpresentational State Transfer and WS-'. Results: A RESTful web service will be designed and implemented to show that REST as cloud-based integration method can be used to support cloud services. And a qualitative comprehensive comparison will be contacted during research as well to answer why there are more and more RESTful web services on web currently. Conclusion: Based on study on cloud computing, web service, integration method, and implementation of RESTful web services as well as comprehensive comparison between two most popular integration methods REST and WS-', we found that REST has a bunch of advantages of many areas, but not perfect, which shows that there is no permanent best solution of building applications, it really depends on our requirements.