ESB Federation for Large-Scale SOA

ebmwebsourcing.com Embracing service-oriented architectures in the context of large systems, such as the Web, rises a set of new and chal-lenging issues: increased size and load in terms of users and services, distribution, and dynamicity. A top-down feder-ation of service infrastructure support that we name “ser-vice cloud ” and that is capable of growing to the scale of the Internet, is seen as a promising response to such new challenges. In this paper, we define the service cloud con-cept, its promises and the requirements in terms of architec-ture and the corresponding middleware. We present some preliminary proofs of concept through the integration of a JBI-compliant enterprise service bus, extended to our needs, and a scalable semantic space infrastructure, both relying on an established grid middleware environment. The new ap-proach offers service consumers and providers a fully trans-parent, distributed and federated means to access, compose and deploy services on the Internet. Technically, our con-tribution advances core service bus technology towards the service cloud by scaling the registries and message routers to the level of federations via a hierarchical approach, and by incorporating the communication and coordination facilities offered by a global semantic space.1