How to disable XML-RPC multicall

[vedadramovic]

Hello is there a way to disable XML-RPC multicall (system.multicall) in control manager?
used functions are:
(#uses "CtrlXmlRpc")
xmlrpcClient();
xmlrpcConnectToServer(id, host, port, secure);
xmlrpcCall(id, xmlRpcMethod, args, res);
xmlrpcCloseServer(id);


We have control manager that uses dpQueryConnectSingle(...)
This manager communicates with third party devices and software using XML-RPC.
In some cases XML-RPC multicall is generated form WinCCOA even each XML-RPC call is made in different thread.

Best regards,
Vedad

[leoknipp]

Hello,

can you please describe in detail what is meant with "multicall".
Does it mean that the function xmlrpcCall() is started several times (even if the first call was not finished)?

Best Regards
Leopold Knipp
Senior Support Specialist

[e_hagenaar]

Did you find a solution? because i have the same issue.

Best regards,

Erik-Jan
Vedad Ramovic wrote:

Hello is there a way to disable XML-RPC multicall (system.multicall) in control manager?
used functions are:
(#uses "CtrlXmlRpc")
xmlrpcClient();
xmlrpcConnectToServer(id, host, port, secure);
xmlrpcCall(id, xmlRpcMethod, args, res);
xmlrpcCloseServer(id);


We have control manager that uses dpQueryConnectSingle(...)
This manager communicates with third party devices and software using XML-RPC.
In some cases XML-RPC multicall is generated form WinCCOA even each XML-RPC call is made in different thread.

Best regards,
Vedad

[vedadramovic]

Hello Erik-Jan,
yes.

When you call function xmlrpcConnectToServer() make sure to use different "id" as a parameter in every call. When you use the same "id" procedure thinks that it is meant for the same device, so it is making one connection with multiple XML-RPC calls.

Example.

string id = rand();
xmlrpcConnectToServer(id, host, port, secure);

Best regards,
Vedad

[e_hagenaar]

Hello Vedad,

Thank you very much! I used the getCurrentTime() but when the calls a made at more or less the same moment the id is the same and you get the multicall.....

Best regards,
Erik-Jan

Vedad Ramovic wrote:

Hello Erik-Jan,
yes.

When you call function xmlrpcConnectToServer() make sure to use different "id" as a parameter in every call. When you use the same "id" procedure thinks that it is meant for the same device, so it is making one connection with multiple XML-RPC calls.

Example.

string id = rand();
xmlrpcConnectToServer(id, host, port, secure);

Best regards,
Vedad

[fmulder]

Never(!) use rand() or getCurrentTime() as a unique id. rand() may eventually give the same number (although the chance is very small) and getCurrentTime() will give the same result when your application is too fast. Simply use a global integer that you increment every time.

Code: Select all

global int g_iUnique = 0;

int iMyId = g_iUnique++;

share the fun
Frenk Mulder