Stanford Digital Library Testbed: Common Object Services (original) (raw)
| Stanford Digital Library Testbed Development Department of Computer Science Stanford University Stanford, CA |  |
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Common Object Services are objects or groups of objects that provide the basic requirements which most objects need in order to function in a distributed environment. These services are designed to be generic; they do not depend on the type of client object or type of data passed. Note: this is hard to do in ILU since there is no concept of the Object or Any type.
Overview of these COS services(postscript compressed) (powerpoint compressed) (webify-ed gifs)
Provides a way to reference an object independent of its location, type, or state.
Provides the basic capabilities of push and pull event delivery models. Allows for asynchronous events, event "fan-in", notification "fan-out", and event channels.
Event Channel Administration Services
Provides mechanisms for setting up and breaking event channel.
Provides services for creating, deleting, copying, and moving objects in a distributed environment.
Provides services for managing properties of an object.
Provides services for creating and managing objects in a distributed environment.
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