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Is it possible to call remote function in another daemon?

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# 1  
Old 05-05-2011
Is it possible to call remote function in another daemon?
Hi,
Is it possible to call a remote function in another daemon? Here is the setup:
I have two daemons daemon A with function "s" and daemon B with function "k". I need a way function "s" from daemon A to call a function "k" from daemon B and pass some arguments. When the request is processed function "k" returns the output to function "s". Is this possible?
Regards
Peter
# 2  
Old 05-05-2011
IT is possible - it is called RPC - remote procedure call.

Linux and Solaris support doors for this. What OS?
# 3  
Old 05-05-2011
Thank you for the reply!
I need it for Centos. Are there examples and manuals?

Regards

edit: it seems that doors for Linux is not maintained anymore. Is there another solution?
Last edited by rcbandit; 05-05-2011 at 01:08 PM..
# 4  
Old 05-05-2011
RPC is one possibility.

Perhaps for your case, a simple IPC between your two deamons could do it. In function s, daemon A requests deamon B to execute the function k by sending a message with the needed argument. Daemon B receives the message, executes function k and sends the returned value(s) back to daemon A. And this point, A can then resume.

Are the two daemons located on the same machine? If so, is there some plan to run them possibly on separate machines?

Cheers, Loïc
# 5  
Old 05-05-2011
Loic has a good idea -
message queues, shared memory, sockets: all work well on the same box.

Download Advanced Linux Programming

Download chapter 5 or get a copy of Stevens 'Advanced Programming in the UNIX Envrionment'
This User Gave Thanks to jim mcnamara For This Post:
decent
# 6  
Old 05-05-2011
yes IPC is possible solution but I don't an idea how to implement remote call of function using IPC.

I found a solution wit Corba and DBus. The problem is that Corba has no new version since arround 2004. Corba is faster than DBus.
Any idea why Corba is no longer supported?

Regards
# 7  
Old 05-05-2011
For the same reason rampant.org/doors has not been touched for a long time. No userland interest in keeping ti going.
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