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5144cea871
* feature(MongoDB): Remove obsolete legacy wire protocol. * enh(MongoDB): Use more C++17 features, comments about thread safety. * enh(MongoDB) Performance improvements (std::set --> std::vector, improved few internal functions). * enh(MongoDB) Performance improvements (Document member index for fast search, optimised serialisation in OpMsgMessage). * enh(MongoDB) Performance improvements (move semantics for Document::addElement, improved toString(), use noexcept where appropriate). * enh(MongoDB): Introduce enums for binary subtypes and more user friendly printout of UUIDs. * enh(MongoDB) Performance improvements (move semantics in Element, improved implementation of toString()). * enh(MongoDB) Performance improvements (ObjectId and RegularExpression.). * enh(MongoDB): add createIndex that uses new wire protocol.
129 lines
2.4 KiB
C++
129 lines
2.4 KiB
C++
//
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// MessageHeader.h
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//
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// Library: MongoDB
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// Package: MongoDB
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// Module: MessageHeader
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//
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// Definition of the MessageHeader class.
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//
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// Copyright (c) 2012, Applied Informatics Software Engineering GmbH.
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// and Contributors.
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//
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// SPDX-License-Identifier: BSL-1.0
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//
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#ifndef MongoDB_MessageHeader_INCLUDED
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#define MongoDB_MessageHeader_INCLUDED
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#include "Poco/MongoDB/MongoDB.h"
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#include "Poco/MongoDB/MessageHeader.h"
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namespace Poco {
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namespace MongoDB {
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class Message; // Required to disambiguate friend declaration in MessageHeader.
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class MongoDB_API MessageHeader
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/// Represents the message header which is always prepended to a
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/// MongoDB request or response message.
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{
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public:
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static constexpr Int32 MSG_HEADER_SIZE = 16;
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enum OpCode
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{
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/// Opcodes supported in MongoDB 5.1 and later
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OP_COMPRESSED = 2012,
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OP_MSG = 2013
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};
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explicit MessageHeader(OpCode);
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/// Creates the MessageHeader using the given OpCode.
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virtual ~MessageHeader();
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/// Destroys the MessageHeader.
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void read(BinaryReader& reader);
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/// Reads the header using the given BinaryReader.
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void write(BinaryWriter& writer);
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/// Writes the header using the given BinaryWriter.
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[[nodiscard]] Int32 getMessageLength() const;
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/// Returns the message length.
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[[nodiscard]] OpCode opCode() const;
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/// Returns the OpCode.
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[[nodiscard]] Int32 getRequestID() const;
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/// Returns the request ID of the current message.
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void setRequestID(Int32 id);
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/// Sets the request ID of the current message.
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[[nodiscard]] Int32 responseTo() const;
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/// Returns the request id from the original request.
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private:
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void setMessageLength(Int32 length);
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/// Sets the message length.
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Int32 _messageLength;
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Int32 _requestID;
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Int32 _responseTo;
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OpCode _opCode;
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friend class Message;
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};
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//
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// inlines
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//
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inline MessageHeader::OpCode MessageHeader::opCode() const
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{
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return _opCode;
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}
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inline Int32 MessageHeader::getMessageLength() const
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{
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return _messageLength;
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}
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inline void MessageHeader::setMessageLength(Int32 length)
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{
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poco_assert (_messageLength >= 0);
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_messageLength = MSG_HEADER_SIZE + length;
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}
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inline void MessageHeader::setRequestID(Int32 id)
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{
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_requestID = id;
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}
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inline Int32 MessageHeader::getRequestID() const
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{
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return _requestID;
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}
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inline Int32 MessageHeader::responseTo() const
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{
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return _responseTo;
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}
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} } // namespace Poco::MongoDB
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#endif // MongoDB_MessageHeader_INCLUDED
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