01-09-2010
C++/Java full-duplex communication
Hello,
here's my situation: I have a C++ server running on a well known machine and a number of Java clients running on other machines (assumed as unknown) on the same LAN. What I want to achieve is full duplex communication between those applications, in order to exchange complex objects and data (the client initiates communication and then the server can communicate freely by sending messages asynchronously without the need for other requests from the client). I would like to use some standard, widely used protocol instead of simple sockets, so as to promote easy extendability of the system (the first version will have only a server and a client, but subsequent versions could include other components as well, mainly in Java, but could be any language).
I've googled a little but found nothing that fits, I was interested by SOAP and similar protocols, but it seems to me that it is only one-way. I've also seen that someone (eg. Silverlight) is achieving full-duplex for SOAP by implementing a polling mechanism but I don't like this approach.
What should I use?
Thanks a lot,
Gabriele Genta
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rpc(n) Tnm Tcl Extension rpc(n)
__________________________________________________________________________________________________________________________________________________
NAME
rpc - A simple RPC protocol for Tcl applications.
_________________________________________________________________
DESCRIPTION
RPC COMMAND
rpc server port
Set up an RPC server listening an port port. This command returns a rpc handle that be used to register Tcl procs that will be
exported by a trivial RPC protocol on top of TCP. This RPC mechanism allows us to write cooperating scripts without worrying much
about the communication protocol.
rpc client host port
Connect to the RPC server running on host with port port. The returned client handle can be used to invoke an exported proc on the
server host.
rpc delete handle
Delete a server or a client RPC handle. All connections associated with the handle will be closed.
rpc register rpchandle proc
Export proc as an RPC callable proc using the server handle rpchandle. Only registered procs can be called by RPC clients.
rpc unregister rpchandle proc
Remove proc from the list of exported procs on server handle rpchandle.
rpc info [rpchandle]
Calling rpc info without any arguments returns a list of all rpc handles that have been created using the rpc server and rpc client
command. Info about a specific rpc file handle rpchandle is returned by using the optional argument. The result is a list contain-
ing the tcp file handle used for the communication and the list of registered commands for a rpc handle and a list of all files that
represent connections to an rpc server. This list is empty if rpchandle belongs to a rpc client.
rpc# [-async] proc arg1 arg2 ...
To invoke a remote procedure proc, use the same syntax as used with a local invocation preceeded by a client rpchandle. The result
of the remote procedure call will be returned or an error if the underlying communication channel signals errors. The -async options
can be used to invoke proc without waiting for it to complete. The async option will never return a result.
SEE ALSO
scotty(1), Tcl(n)
AUTHORS
Juergen Schoenwaelder <schoenw@cs.utwente.nl>
Tnm rpc(n)