105 lines
3.4 KiB
C++
105 lines
3.4 KiB
C++
/* Copyright (c) 2018, Oracle and/or its affiliates. All rights reserved.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License, version 2.0,
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as published by the Free Software Foundation.
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This program is also distributed with certain software (including
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but not limited to OpenSSL) that is licensed under separate terms,
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as designated in a particular file or component or in included license
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documentation. The authors of MySQL hereby grant you an additional
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permission to link the program and your derivative works with the
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separately licensed software that they have included with MySQL.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License, version 2.0, for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA */
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#ifndef GROUP_VALIDATION_MESSAGE_INCLUDED
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#define GROUP_VALIDATION_MESSAGE_INCLUDED
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#include "my_inttypes.h"
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#include "plugin/group_replication/include/gcs_plugin_messages.h"
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/** The base message for group validation messages */
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class Group_validation_message : public Plugin_gcs_message {
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public:
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/** Enum for message payload */
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enum enum_payload_item_type {
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PIT_UNKNOWN = 0, // Not used
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PIT_VALIDATION_TYPE = 1, // The validation type, length: 2 bytes
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PIT_VALIDATION_CHANNEL = 2, // The member has channel flag, length: 1 bytes
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PIT_MEMBER_WEIGHT = 3, // The member weight, length: 2 bytes
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PIT_MAX // No valid type codes can appear after this one
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};
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/** Enum for the types of validation action **/
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enum enum_validation_message_type {
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GROUP_VALIDATION_UNKNOWN_MESSAGE = 0, // Reserved type
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ELECTION_VALIDATION_MESSAGE = 1, // Member info for elections
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GROUP_VALIDATION_MESSAGE_END = 2 // Enum end value
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};
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/**
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Class constructor
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@param has_channels This member has running slave channels?
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@param member_weight_arg The election weight of this member
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*/
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Group_validation_message(bool has_channels, uint member_weight_arg);
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/**
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Message constructor for raw data
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@param[in] buf raw data
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@param[in] len raw length
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*/
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Group_validation_message(const uchar *buf, size_t len);
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/** Class destructor */
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virtual ~Group_validation_message();
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/**
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Does the member has running channels
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@return true if yes, false otherwise
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*/
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bool has_slave_channels() const;
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/**
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The election weight of this member
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@return The member weight
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*/
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uint get_member_weight() const;
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protected:
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/**
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Encodes the message contents for transmission.
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@param[out] buffer the message buffer to be written
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*/
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void encode_payload(std::vector<unsigned char> *buffer) const;
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/**
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Message decoding method
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@param[in] buffer the received data
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*/
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void decode_payload(const unsigned char *buffer, const unsigned char *);
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private:
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/**The message type*/
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enum_validation_message_type group_validation_message_type;
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/** Does the member has channels? */
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bool has_channels;
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/** The member election weight */
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uint member_weight;
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};
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#endif /* GROUP_VALIDATION_MESSAGE_INCLUDED */
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