Enterprise Services on the Cloud by a Technique to Maintain Variability

These variability concerns affect both the service interface and the service provider implementation and hence are crosscutting in nature. In this paper, we use principles of aspect-oriented software development to modularize these variability concerns. We also provide an aspect specification scheme to specify these concerns. We propose an approach to create heavyweight service variants centered on a Service Kernel, which forms a common service core across tenants. Heavyweight service variants are created by weaving aspects into the service kernel. Our approach provides improved governance for the provider while offering maximum flexibility for the consumers.