Abstract:
Nowadays, Cloud Software as a Service (SaaS) and Service Oriented Architecture (SOA) have received increased attention as approaches to software development in distributed systems. Cloud SaaS is the most common model in cloud computing that provides software as service over internet to support the availability and scalability of services. While SOA is an architectural style that focuses on loosely coupled interaction between services to provide the reusability .
In SaaS model , the applications suffers from functions customization and reusability. On the other hand, SOA architecture suffers from many scalability issues. There is a need for a new model that tackle these issues.
This research aims to bridge the gap between SOA and SaaS through designing a new model as an attempt to combine SOA and SaaS in one model and then leverage from SOA reusability and SaaS scalability. The proposed model have the structure of SaaS multi-tenants applications with modified in computing and application code structure by applied the SOA concepts .
The researchfollowed case study methodology and evaluated through designed healthcare information system based on the proposed model. According to the evaluation results , the implementation of the proposed model on healthcare information system is increasing the reusability and scalability of system.
