Multiple ice_response to a single AMI callback

kishore

Is it possible to use make multiple ice_response calls from the server side
in response to a single ami call?

I have a situation where I want to send log messages as they are being generated back through the callback object, but on my second ice_response
call I get an "Ice::Exception raised by AMI::callback"? I know it kind of breaks
the paradigm to be returning multiple times for a single method call.

bernard

Hi Kishore,

If on the server side you dispatch a request with AMD, you can only provide one response to this request (a "success" response or an exception). Passing a second response to the AMD callback results in undefined behavior, e.g. in C++ you may get a crash.

Also note that the server is totally unaware of the type of invocation used by the client (synchronous or AMI); likewise, the client is totally unaware of the type of dispatch used by the server.

Best regards,
Bernard

kishore

makes sense. thanks. Wondering if there are other mechanisms better suited
to what I am trying to do. In the distributed rendering system I want to
communicate the renderers logs back to the client.

So far my client is not a "server" so doesnt expose any objects. All communication from the server to object is in response to a method
call.

Is there another way I can send the log messages back from
the server without say creating a listener object on the the client side and
making a server make calls to it?


thanks

matthew

From a fundamentals point of view there are only two ways a client can find out about new changes:

#1: The client can pull new changes from a server (polling).
#2: The server can push new changes onto a client (pushing).

If you don't want to poll then you have to push. There are no other alternatives.

As to why you don't want to make your client a server I don't know... If you are worried about security, or firewalls or the like you should look at bi-directional connections.