Question about client progress callback

[bladewhistle]

In my application, some times client call the server with a complex mission will cost several seconds. It is necessary to provide a callback function mechanism to display a progress UI at client side.

In the manual, I see there are some description about the client progress callback.

But there are no description about how to update the progress from the server side.

Any code or example?

Thanks.

[john06]

This is not really related to RCF, RCF is supporting callback, and this is up to you to define what your callback(s) is giving you !
In your case you should define something like:
"typedef void (* _ProgressProc)( float percent );" which is defined on client side (for example to display a progress bar), where percent argument is the % calculated on server and sent back to client.
and _ProgressProc is an argument of the function defined on server side that you call from client.

[bladewhistle]

Hi, Thanks for your reply.

Are you sure the RCF really support the C++ native callback?? Since I don't see any description in the documentation.

[jarl]

Currently the purpose of the RCF client side progress callback is to periodically return control to the application, while a synchronous call is in progress. From the progress callback you can do things like cancel the call (for example if the app wants to shut down), repaint UI's , show progress bars, or anything else you might want to do.

What bladewhistle is asking for, IIUC, is the ability to send progress indicators back from the server, during a remote call, and utilize that in the client side progress callback. This is currently not supported, but IMO that's a a great feature - I will make it a priority for upcoming releases.

[bladewhistle]

Thanks Jarl.

My current workaround is using another connection call server for interval progress retrieving(1 or 2 seconds) during a long time call.

[jarl]

Yep, I thought about suggesting that - glad you got it working.