Contents

# Copyright (C) 2017 MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.

module Mongo
  module Operation

    # A command that uses OP_MSG, with the document as payload type 0.
    #
    # @since 2.5.0
    module UsesCommandOpMsg

      private

      READ_PREFERENCE = '$readPreference'.freeze

      def add_cluster_time!(selector, server)
        if cluster_time = server.mongos? && server.cluster_time
          selector[CLUSTER_TIME] = cluster_time
        end
      end

      def unacknowledged_write?
        write_concern && write_concern.get_last_error.nil?
      end

      def command_op_msg(server, selector, options)
        add_cluster_time!(selector, server)
        selector[Protocol::Msg::DATABASE_IDENTIFIER] = db_name
        selector[READ_PREFERENCE] = read.to_doc if read
        session.add_id!(selector) if session
        flags = unacknowledged_write? ? [:more_to_come] : [:none]
        Protocol::Msg.new(flags, options, selector)
      end
    end
  end
end

Version data entries

1 entries across 1 versions & 1 rubygems

Version	Path
mongo-2.5.0.beta	lib/mongo/operation/uses_command_op_msg.rb