Service Oriented Architecture (SOA) is an architectural style that is widely used in distributed and dynamic systems. The Service oriented architecture Modeling Language (SoaML) is an OMG standard for modelling SOA independent of a technology. This paper presents a tool for modelling SOA using SoaML and generating OSGi Declarative Services Models from SoaML models. SoaML metamodel has been implemented as an Ecore model using the Eclipse Modeling Framework (EMF). An Eclipse plug-in that allows architects to graphically design SoaML models has been developed using the Graphical Modeling Framework (GMF). We have also implemented a model transformation using ATLAS Transformation Language (ATL) in order to partially generate Declarative Services models. The generated model is used as a Declarative Services Component Description XML specification which is needed to execute code on the OSGi service oriented platform. In this way, we provide SoaML with Model Driven Architecture support.

The simplest way to maximize the use of the available broadband capacity is to compress data transfers and cache data whenever possible. The HTTP protocol allows both compression and caching, benefiting both servers (in terms of bandwidth requirements and lighter load) and clients (in terms of faster downloads).In this paper, we investigate some of the top-ranking websites within New Zealand to see how well they are setup for network performance. We find a surprisingly large number of sites that are not well-setup to cater for compression and caching. We see that simple tuning of these servers to take advantage of compression and caching will enable better use of the network bandwidth. Though this study is limited to New Zealand, similar analysis could be made of other servers irrespective of their location.