1. Generate session classes from codebase.

grpc_tools_ruby_protoc -I proto/ --ruby_out=lib --grpc_out=lib proto/entities.proto
grpc_tools_ruby_protoc -I proto/ --ruby_out=lib --grpc_out=lib proto/sessions.proto

2. We create an SessionsInterceptor

class SessionsInterceptor < Gruf::Interceptors::ClientInterceptor
  def call(request_context:)
    logger.info "Got method #{request_context.method}!"
    yield
  end
end

3. We use the SessionsInterceptor with the Gruf client to communicate. You can see which methods that is possible to call in the generated ruby files.

begin
  client = ::Gruf::Client.new(
    service: ::Org::Sessions,
    options: {hostname: ENV['TOTAL_ACCESS_API_URL']},
    client_options: {
      interceptors: [SessionsInterceptor.new]
    }
  )

  org_session = client.call(:CreateSession, { username: ENV['TOTAL_ACCESS_API_USERNAME'], password: ENV['TOTAL_ACCESS_API_PASSWORD'], device_uuid: ENV['TOTAL_ACCESS_API_UUID'] })

rescue Gruf::Client::Error => e
  logger.error "#{e.error.message}"
end

3. In the org_session variable there will be an auth_token that is to be reused in the following requests.