136 lines
5.7 KiB
C++
136 lines
5.7 KiB
C++
/* Copyright (c) 2015, 2019, 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 COMPATIBILITY_MODULE_INCLUDED
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#define COMPATIBILITY_MODULE_INCLUDED
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#include <map>
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#include "plugin/group_replication/include/member_version.h"
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/* Possible outcomes when checking inter version compatibility */
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typedef enum st_compatibility_types {
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INCOMPATIBLE = 0, // Versions not compatible
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INCOMPATIBLE_LOWER_VERSION, // Versions not compatible, member has lower
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// version
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COMPATIBLE, // Versions compatible
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READ_COMPATIBLE // Member can read but not write
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} Compatibility_type;
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class Compatibility_module {
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public:
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Compatibility_module();
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Compatibility_module(Member_version &local_version);
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/**
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Returns this member version
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*/
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Member_version &get_local_version();
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/**
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Set the module local version
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@param local_version the new local version to be set
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*/
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void set_local_version(Member_version &local_version);
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/**
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Add a incompatibility between the given members.
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@param from The member that is not compatible with 'to'
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@param to The member with which 'from' is not compatible with
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*/
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void add_incompatibility(Member_version &from, Member_version &to);
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/**
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Add a incompatibility between a range of member versions.
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@param from The member that is not compatible with 'to'
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@param to_min The minimum version with which 'from' is not compatible with
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@param to_max The maximum version with which 'from' is not compatible with
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*/
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void add_incompatibility(Member_version &from, Member_version &to_min,
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Member_version &to_max);
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/**
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Checks if the given version is incompatible with another version.
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@param from The member that may be not compatible with 'to'
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@param to The member with which 'from' may be not compatible with
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@param do_version_check If version compatibility check is needed
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@return the compatibility status
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@retval INCOMPATIBLE The versions are not compatible with each other
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@retval COMPATIBLE The versions are compatible with each other
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@retval READ_COMPATIBLE The version 'from' can only read from 'to'
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*/
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Compatibility_type check_incompatibility(Member_version &from,
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Member_version &to,
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bool do_version_check);
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/**
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Checks if the given version is incompatible with another version.
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@param from The member that may be not compatible with 'to'
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@param to The member with which 'from' may be not compatible with
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@return the compatibility status
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@retval INCOMPATIBLE The versions are not compatible with each other
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@retval COMPATIBLE The versions are compatible with each other
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@retval READ_COMPATIBLE The version 'from' can only read from 'to'
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*/
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static Compatibility_type check_version_incompatibility(Member_version from,
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Member_version to);
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/**
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Checks if the given version is incompatible with another version.
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@param from The member that may be not compatible with 'to'
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@param to_min The minimum version with which 'from' is not compatible with
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@param to_max The maximum version with which 'from' is not compatible with
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@return the compatibility status
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@retval true The version is in the range of the incompatible versions
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@retval false The version is not in the range of the incompatible
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versions
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*/
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bool check_version_range_incompatibility(Member_version &from,
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unsigned int to_min,
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unsigned int to_max);
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/**
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Checks if the given version is compatible with this member local version.
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@param to The member with which 'from' may be not compatible with
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@param is_lowest_version If to version is lowest in the group
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@return the compatibility status
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@retval INCOMPATIBLE The versions are not compatible with each other
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@retval COMPATIBLE The versions are compatible with each other
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@retval READ_COMPATIBLE The version 'from' can only read from 'to'
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*/
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Compatibility_type check_local_incompatibility(Member_version &to,
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bool is_lowest_version);
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virtual ~Compatibility_module();
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private:
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/*The configured local version*/
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Member_version *local_version;
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/*
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The incompatibility matrix: <version V, version incompatible with Vmin to
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Vmax>
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*/
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std::multimap<unsigned int, std::pair<unsigned int, unsigned int>>
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incompatibilities;
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};
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#endif /* COMPATIBILITY_MODULE_INCLUDED */
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