CURA 10618 broadcast settings to engine plugins

[jellespijker]

Description

It is now possible to Broadcast the Settings as provided by Cura to all plugins, provided that plugin subscribes to the channel. This information has to be given by the front-end.

Adding a new Broadcast requires the following steps:

1. CuraEngine_grpc_defintions a. Add a BroadcastService<Name>Request message b. Add a new RPC to all Slot Services rpc Broadcast<Name>(cura.plugins.v0.BroadcastService<Name>Request) returns (google.protobuf.Empty) {}
2. CuraEngine a. Add Converter for the BroadcastService<Name>Request from the Native types to plugins/converters.h called broadcast_<name>_request b. Add a factory function to plugins/broadcasts.h which will return the converter

    template<CharRangeLiteral BroadcastChannel>
    requires is_broadcast_channel_v<BroadcastChannel, "Broadcast<Name>">
    constexpr auto broadcast_request_message_factory(auto&&... args)
    {
        return broadcast_<name>_request{}(std::forward<decltype(args)>(args)...);
    };

   c. Add a factory function to plugins/broadcast.h which will return the RPC

     template<class Stub, CharRangeLiteral BroadcastChannel>
     requires is_broadcast_channel_v<BroadcastChannel, "Broadcast<Name>">
     constexpr auto broadcast_request_factory()
     {
         return agrpc::RPC<&Stub::PrepareAsyncBroadcast<Name>>{};
     }

   d. Usage of in the engine will then be: slots::instance().broadcast<"Broadcast<Name>">(<args>);

See also PR:

• https://github.com/Ultimaker/CuraEngine_example_plugin_cpp/pull/1
• https://github.com/Ultimaker/CuraEngine_grpc_defintions/pull/7

[github-actions[bot]]

Unit Test Results

26 tests  ±0   26 :heavy_check_mark: ±0   13s :stopwatch: +4s   1 suites ±0     0 :zzz: ±0    1 files   ±0     0 :x: ±0 

Results for commit 1060ba9a. ± Comparison against base commit 536fcbf6.

:recycle: This comment has been updated with latest results.

[jellespijker]

Superseded by #1900