NAME

RpcRegistry - name space for finding RPC services

SYNOPSIS

#include <Dispatch/rpcregistry.h>

DESCRIPTION

RpcRegistry provides a name space for finding RPC services based on the use of NFS filesystems among a group of hosts. When an RPC service wishes to record its host name and port number, it will give the path of a file in which to store the information. When a client wants to find the RPC service's host name and port number, it will give the path of a file from which to read the information. Usually the path will be the name of a file in the current working directory since different hosts may have different absolute pathnames for the same file in a NFS filesystem. The RPC service's name space is the name space of the host's filesystem and the file's contents provides the information needed to open a connection to the RPC service.

PUBLIC OPERATIONS

Each function is a static member function, which means a program can call it without having to instantiate an RpcRegistry object. Each function returns true if it succeeded or false if some error occurred.

boolean record(const char* path, int port)

Record the RPC service's host name and port number in the given file. If the file already exists, its previous contents will be lost.

boolean erase(const char* path)

Remove the file which stores the RPC service's host name and port number so that no more clients will be able to contact the RPC service.

boolean find(const char* path, char*& hostname, int& port)

Open the file which stores the RPC service's host name and port number. If the file does not exist, return failure silently. If the file does exist, read the RPC service's host name and port address from it. If ``hostname'' is nil upon entry, it will contain the address of a dynamically allocated string upon exit (which must be freed by the caller).

SEE ALSO

RpcService(3I)