Construct SaaS Applications from Multi-abstract-level: Method and System

With the emergence of SaaS, enterprises are looking for available application construction approach to quickly adopt to new business requirements and reduce application development and maintenance costs. To speed the application construction and guarantee multi-tenant configurability in large amount, a flexible design is of major importance. This paper puts forward the concept of abstract SaaS application and proposes a fast and flexible multi-abstract-level construction approach for application designers based on service-oriented architecture. The approach abstracts the construction process into three levels: abstract SaaS application level construction, composition service level construction and service component level construction. According to business requirements and SLA constraints of multi-tenant applications, the designer first constructs the tenant application on one level and produces a running application which satisfies the tenants´ SLA (Service-Level Agreement) constraints.