Class: Modal::ApiClient

Inherits:
Object
  • Object
show all
Defined in:
lib/modal/api_client.rb

Constant Summary collapse

RETRYABLE_GRPC_STATUS_CODES = 
Set.new([
  GRPC::Core::StatusCodes::DEADLINE_EXCEEDED,
  GRPC::Core::StatusCodes::UNAVAILABLE,
  GRPC::Core::StatusCodes::CANCELLED,
  GRPC::Core::StatusCodes::INTERNAL,
  GRPC::Core::StatusCodes::UNKNOWN
])

Instance Method Summary collapse

Constructor Details

#initialize ⇒ ApiClient

Returns a new instance of ApiClient.



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# File 'lib/modal/api_client.rb', line 14

def initialize
  @profile = Config.profile
  target, credentials = parse_server_url(@profile[:server_url])

  @stub = Modal::Client::ModalClient::Stub.new(
    target,
    credentials,
    channel_args: {
      "grpc.max_receive_message_length" => 100 * 1024 * 1024, # 100 MiB
      "grpc.max_send_message_length" => 100 * 1024 * 1024 # 100 MiB
    }
  )
end

Instance Method Details

#call(method_name, request_pb, options = {}) ⇒ Object 



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# File 'lib/modal/api_client.rb', line 28

def call(method_name, request_pb, options = {})
  retries = options[:retries] || 3
  base_delay = options[:base_delay] || 0.1 # seconds
  max_delay = options[:max_delay] || 1.0 # seconds
  delay_factor = options[:delay_factor] || 2
  timeout = options[:timeout] # milliseconds

  idempotency_key = SecureRandom.uuid
  attempt = 0

  loop do
    metadata = {
      "x-modal-client-type" => Modal::Client::ClientType::CLIENT_TYPE_LIBMODAL.to_s, # TODO: libmodal_rb!!!
      "x-modal-client-version" => "1.0.0",
      "x-modal-token-id" => @profile[:token_id],
      "x-modal-token-secret" => @profile[:token_secret],
      "x-idempotency-key" => idempotency_key,
      "x-retry-attempt" => attempt.to_s
    }
    metadata["x-retry-delay"] = base_delay.to_s if attempt > 0

    call_options = {metadata: metadata}
    call_options[:deadline] = Time.now + timeout / 1000.0 if timeout

    begin
      response = @stub.send(method_name, request_pb, call_options)
      return response
    rescue GRPC::BadStatus => e
      if RETRYABLE_GRPC_STATUS_CODES.include?(e.code) && attempt < retries
        puts "Retrying #{method_name} due to #{e.code} (attempt #{attempt + 1}/#{retries})"
        sleep(base_delay)
        base_delay = [base_delay * delay_factor, max_delay].min
        attempt += 1
      else
        raise convert_grpc_error(e)
      end
    rescue => e
      raise e
    end
  end
end