grpc/examples/ruby/errors_and_cancellation/error_examples_server.rb

#!/usr/bin/env ruby
# -*- coding: utf-8 -*-

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# Error-throwing implementation of Route Guide service.
#
# Usage: $ path/to/route_guide_server.rb

this_dir = File.expand_path(File.dirname(__FILE__))
lib_dir = File.join(File.dirname(this_dir), 'lib')
$LOAD_PATH.unshift(lib_dir) unless $LOAD_PATH.include?(lib_dir)

require 'grpc'
require 'route_guide_services_pb'

include Routeguide

include GRPC::Core::StatusCodes

# CanellingandErrorReturningServiceImpl provides an implementation of the RouteGuide service.
class CancellingAndErrorReturningServerImpl < RouteGuide::Service
  # def get_feature
  #   Note get_feature isn't implemented in this subclass, so the server
  #   will get a gRPC UNIMPLEMENTED error when it's called.

  def list_features(rectangle, _call)
    raise "string appears on the client in the 'details' field of a 'GRPC::Unknown' exception"
  end

  def record_route(call)
    raise GRPC::BadStatus.new_status_exception(CANCELLED)
  end

  def route_chat(notes)
    raise GRPC::BadStatus.new_status_exception(ABORTED, details = 'arbitrary', metadata = {somekey: 'val'})
  end
end

def main
  port = '0.0.0.0:50051'
  s = GRPC::RpcServer.new
  s.add_http2_port(port, :this_port_is_insecure)
  GRPC.logger.info("... running insecurely on #{port}")
  s.handle(CancellingAndErrorReturningServerImpl.new)
  s.run_till_terminated
end

main