Dispatcher

[iivdam]

Hi, Feature idea when DataStorm is moved into Ice: add an dispatcher api to DataStorm so you can select your own thread for executing the upcalls like Side question: in Ice it is not allowed to use synchronous calls from within the dispatch call, can this be changed in the new Ice version? Regards Emko

[bernardnormier]

We reworked the terminology for Ice 3.8:

• dispatch/dispatching/dispatcher is about the processing of incoming requests (like in IceRPC, see https://docs.icerpc.dev/icerpc/dispatch/dispatch-pipeline)
• we now use execute/executor for customizing the execution of upcalls (such as dispatches)

in Ice it is not allowed to use synchronous calls from within the dispatch call, can this be changed in the new Ice version?

(this is about execute with the new terminology).

As explained in the note, if your custom executor makes blocking calls - in particular other invocations - you can easily self-deadlock.

Ice 3.8 will introduce a dispatch pipeline which may be more appropriate than custom executors for your use-case... it depends very much on what you want to do.

add an dispatcher api to DataStorm so you can select your own thread for executing the upcalls

Which DataStorm upcalls are you referring to?

Thanks, Bernard

[iivdam]

Thanks Bernard,

Which DataStorm upcalls are you referring to?

The callbacks which are registered with onConnectedWriters, onSamples etc,

Our software (legacy) is based on a single 'application message-loop' and all async events (timers/received messages) are synchronous handled in the message-loop. For a demo (replacement current middleware stack) i use the dispatch registration as in doc to redirect incoming Ice requests to the application message-loop. It would be welcome if the registered DataStorm callbacks (onConnectedWriters etc) can also in a generic way be redirected to the application message-loop.

regards, Emko