A framework for brokered Service Level agreements in SOA environments

With the proliferation of Internet-enabled devices and the growing adoption of the Service Oriented Architecture (SOA), users increasingly require services that can meet their functional and nonfunctional requirements. In this paper, we propose a novel framework for Web service provisioning, which relies on brokered Service Level agreements (SLAs), between clients and service providers, and a publish/subscribe model to handle notifications on significant changes in quality-of-service (QoS) offerings. One of the advantages of the approach is that service providers can provide several service types and different levels of service. Moreover, the publish/subscribe model allows Service Brokers to be aware of significant changes in the QoS offerings of service providers; and consequently, be able to monitor the execution of SLAs.