encoder_client.hpp

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#pragma once
 
#include <grpcpp/channel.h>
 
#include <viam/api/component/encoder/v1/encoder.grpc.pb.h>
 
#include <viam/sdk/components/encoder.hpp>
#include <viam/sdk/config/resource.hpp>
 
namespace viam {
namespace sdk {
namespace impl {
 
class EncoderClient : public Encoder {
   public:
    using interface_type = Encoder;
    EncoderClient(std::string name, std::shared_ptr<grpc::Channel> channel);
    position get_position(const ProtoStruct& extra, position_type position_type) override;
    void reset_position(const ProtoStruct& extra) override;
    properties get_properties(const ProtoStruct& extra) override;
    std::vector<GeometryConfig> get_geometries(const ProtoStruct& extra) override;
    ProtoStruct do_command(const ProtoStruct& command) override;
 
    // the `extra` param is frequently unnecessary but needs to be supported. Ideally, we'd
    // like to live in a world where implementers of derived classes don't need to go out of
    // their way to support two versions of a method (an `extra` version and a non-`extra`
    // version), and users don't need to pass an unnecessary parameters to all method calls.
    //
    // To do this, we define in the parent resource class a non-virtual version of the methods
    // that calls the virtual method and passes a `nullptr` by default in place of the `extra`
    // param. In order to access these versions of the methods within the client code, however,
    // we need to include these `using` lines.
    using Encoder::get_geometries;
    using Encoder::get_position;
    using Encoder::get_properties;
    using Encoder::reset_position;
 
   private:
    using StubType = viam::component::encoder::v1::EncoderService::StubInterface;
    std::unique_ptr<StubType> stub_;
    std::shared_ptr<grpc::Channel> channel_;
};
 
}  // namespace impl
}  // namespace sdk
}  // namespace viam