mongo-ruby-driver/lib/mongo/message/message_header.rb

46 lines
1.2 KiB
Ruby

# --
# Copyright (C) 2008-2009 10gen 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.
# ++
require 'mongo/util/byte_buffer'
module Mongo
class MessageHeader
HEADER_SIZE = 16
def initialize()
@buf = ByteBuffer.new
end
def read_header(db)
@buf.rewind
@buf.put_array(db.receive_full(HEADER_SIZE).unpack("C*"))
raise "Short read for DB response header: expected #{HEADER_SIZE} bytes, saw #{@buf.size}" unless @buf.size == HEADER_SIZE
@buf.rewind
@size = @buf.get_int
@request_id = @buf.get_int
@response_to = @buf.get_int
@op = @buf.get_int
self
end
def dump
@buf.dump
end
end
end