85 lines
2.0 KiB
Ruby
85 lines
2.0 KiB
Ruby
# --
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# Copyright (C) 2008-2009 10gen Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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# ++
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require 'mongo/util/bson'
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require 'mongo/util/byte_buffer'
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module XGen
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module Mongo
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module Driver
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class Message
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HEADER_SIZE = 16 # size, id, response_to, opcode
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@@class_req_id = 0
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attr_reader :buf # for testing
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def initialize(op)
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@op = op
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@message_length = HEADER_SIZE
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@data_length = 0
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@request_id = (@@class_req_id += 1)
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@response_id = 0
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@buf = ByteBuffer.new
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@buf.put_int(16) # holder for length
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@buf.put_int(@request_id)
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@buf.put_int(0) # response_to
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@buf.put_int(op)
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end
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def write_int(i)
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@buf.put_int(i)
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update_message_length
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end
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def write_long(i)
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@buf.put_long(i)
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update_message_length
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end
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def write_string(s)
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BSON.serialize_cstr(@buf, s)
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update_message_length
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end
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def write_doc(hash)
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@buf.put_array(BSON.new.serialize(hash).to_a)
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update_message_length
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end
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def to_a
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@buf.to_a
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end
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def dump
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@buf.dump
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end
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# Do not call. Private, but kept public for testing.
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def update_message_length
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pos = @buf.position
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@buf.put_int(@buf.size, 0)
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@buf.position = pos
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end
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end
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end
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end
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end
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