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NAME

       RpcPeer - support bi-directional RPC between two services

SYNOPSIS

       #include <Dispatch/rpcpeer.h>

DESCRIPTION

       An  RpcPeer  (actually,  an  instance  of  a  derived class) tries to open a connection to
       another RpcPeer.  If the other RpcPeer is not yet running, the RpcPeer will create its own
       port  and  wait  for  the other RpcPeer to open a connection.  When either RpcPeer opens a
       connection, each RpcPeer will create both a reader and a writer so each RpcPeer  can  send
       RPC requests to its opposite over the same connection.

CONSTRUCTOR

       RpcPeer(const char* lPath, int lPort = 0)
              Store  the  arguments  for  later use since a base constructor can't call a derived
              class's virtual function.  The derived class's constructor  should  call  ``init'',
              described below.

       void init(const char* rPath)
              Find  the host name and port number registered by the other RpcPeer and try to open
              a connection to it.  If it's not running, create our own  port  and  wait  for  the
              other RpcPeer to open a connection.

PUBLIC OPERATIONS

       void run()
       void quitRunning()
              Read  RPC  requests  continuously  until ``quitRunning()'' terminates the loop.  If
              you're using InterViews, you don't have to  call  ``run()''  since  the  InterViews
              event-reading code will also read RPC requests.

PROTECTED OPERATIONS

       virtual boolean createReaderAndWriter(const char* rHost, int rPort) = 0
       virtual void createReaderAndWriter(int fd) = 0
              You  must  define  both  functions in a derived class in order to start reading and
              writing RPC requests over the connection.  Typically both functions would create  a
              writer  using  the  given  parameters  and  then  attach  a  reader to the writer's
              rpcstream.

SEE ALSO

       Dispatcher(3I), RpcReader(3I), RpcRegistry(3I), RpcWriter(3I)