How would one convert an existing Web Service to a Grid Service?
Grid Services are web services that provide the basic set of methods described in the OGSI (Open Grid Services Infrastructure) specification. The Globus Toolkit 3.0 provides Java classes that implement the OGSI core features. If an existing web service is written in Java, the service implementation can be modified to be a subclass of these basic Grid service classes, so that the OGSI functionality is provided automatically. Additional work could then be done to more cleanly integrate the capabilities offered by the OGSI methods and the features offered by the original web service. To take full advantage of the capabilities offered by the OGSA architecture, the application might require some reorganization. The degree to which OGSA is incorporated into an application is actually quite flexible.
