/*
* this method simulates net_kernel only for
* the purpose of replying to pings.
*/
private bool netKernel(OtpMsg m)
{
OtpMbox mbox = null;
try
{
Erlang.Tuple t = (Erlang.Tuple)(m.getMsg());
Erlang.Tuple req = (Erlang.Tuple)t.elementAt(1); // actual request
Erlang.Pid pid = (Erlang.Pid)req.elementAt(0); // originating pid
Erlang.Object[] pong = new Erlang.Object[2];
pong[0] = req.elementAt(1); // his #Ref
pong[1] = new Erlang.Atom("yes");
mbox = createMbox();
mbox.send(pid, new Erlang.Tuple(pong));
return(true);
}
catch (System.Exception)
{
}
finally
{
closeMbox(mbox);
}
return(false);
}
/*
* <p> Determine if another node is alive. This method has the side
* effect of setting up a connection to the remote node (if
* possible). Only a single outgoing message is sent; the timeout is
* how long to wait for a response. </p>
*
* <p> Only a single attempt is made to connect to the remote node,
* so for example it is not possible to specify an extremely long
* timeout and expect to be notified when the node eventually comes
* up. If you wish to wait for a remote node to be started, the
* following construction may be useful: </p>
*
* <pre>
* // ping every 2 seconds until positive response
* while (!me.ping(him,2000));
* </pre>
*
* @param node the name of the node to ping.
*
* @param timeout the time, in milliseconds, to wait for response
* before returning false.
*
* @return true if the node was alive and the correct ping response
* was returned. false if the correct response was not returned on
* time.
**/
/*internal info about the message formats...
*
* the request:
* -> REG_SEND {6,#Pid<[email protected]>,'',net_kernel}
* {'$gen_call',{#Pid<[email protected]>,#Ref<[email protected]>},{is_auth,bingo@aule}}
*
* the reply:
* <- SEND {2,'',#Pid<[email protected]>}
* {#Ref<[email protected]>,yes}
*/
public virtual bool ping(System.String node, long timeout)
{
if (node.Equals(this._node))
{
return(true);
}
OtpMbox mbox = null;
try
{
mbox = createMbox();
mbox.send("net_kernel", node, getPingTuple(mbox));
Erlang.Object reply = mbox.receive(timeout);
Erlang.Tuple t = (Erlang.Tuple)reply;
Erlang.Atom a = (Erlang.Atom)(t.elementAt(1));
return("yes".Equals(a.atomValue()));
}
catch (System.Exception)
{
}
finally
{
closeMbox(mbox);
}
return(false);
}
