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Enabling client systems to discover services accessible by remote procedure calls (rpc) on server systemsEnabling client systems to discover services accessible by remote procedure calls (rpc) on server systems description/claimsThe Patent Description & Claims data below is from USPTO Patent Application 20080162631, Enabling client systems to discover services accessible by remote procedure calls (rpc) on server systems. Brief Patent Description - Full Patent Description - Patent Application Claims
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The present application is a continuation of and claims priority from co-pending U.S. application Ser. No. 10/905,298, entitled, “Enabling Client Systems to Discover Services Accessible by Remote Procedure Calls (RPC) On Server Systems”, filed on Dec. 25, 2004, and is incorporated in its entirety herewith. BACKGROUND OF THE INVENTION1. Field of the Invention The present invention relates to client-server technologies, and more specifically to a method and apparatus for enabling client systems to discover services accessible by remote procedure calls (RPC) on server systems. 2. Related Art Remote procedure calls (RPCs) generally enable a client system to request services provided on server systems (“RPC server system”). In a common scenario, a RPC server system is implemented to execute a service upon receiving an RPC request, and a client system causes execution of the service by sending the RPC request. The results of execution of the service are then generally provided to the client system sending the RPC request. In one prior embodiment, the RPC services are provided on pre-specified RPC server systems according to pre-specified RPC interfaces (e.g., TCP or UDP port number at which to send the request). Thus, any client system requiring execution of a service sends the corresponding RPC request to a RPC server system (on which the service is provided) according to the pre-specified interface. The approach of above may have several limitations. For example, it may be desirable to provide the same service on different (or additional) RPC servers (e.g., to scale), and the clients systems may not be able to automatically (i.e., without additional configuration which specifically indicates the RPC servers on which each RPC service is accessible) discover the availability of the services on the different RPC servers. Accordingly what is needed is a method and apparatus which enables client systems to discover services accessible by remote procedure calls (RPC) on server systems. BRIEF DESCRIPTION OF THE DRAWINGSThe present invention will be described with reference to the accompanying drawings briefly described below. FIG. 1 is a block diagram illustrating an example environment in which various aspects of the present invention can be implemented. FIG. 2A is a flowchart illustrating the operation of an RPC server in enabling a client to discover the available services (accessible on the RPC server) in an embodiment of the present invention. FIG. 2B is a flowchart illustrating the operation of a client system in determining the RPC servers on which a desired RPC service is available for execution, in an embodiment of the present invention. FIG. 3 depicts the content of an example interface language definition (IDL) file which specifies the service interface and the procedure interface (using which the corresponding procedure can be caused to be executed) in an example embodiment. FIGS. 4A and 4B together contain a LDAP (X.500) schema definition using which the content of an IDL file can be represented in an embodiment of the present invention. FIG. 5 is a block diagram of a digital processing system in which various aspects of the present invention are operative when corresponding software instructions are executed. Continue reading about Enabling client systems to discover services accessible by remote procedure calls (rpc) on server systems... 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