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Diffstat (limited to 'wsrep-lib/include/wsrep/view.hpp')
-rw-r--r-- | wsrep-lib/include/wsrep/view.hpp | 171 |
1 files changed, 171 insertions, 0 deletions
diff --git a/wsrep-lib/include/wsrep/view.hpp b/wsrep-lib/include/wsrep/view.hpp new file mode 100644 index 00000000..d17c27f1 --- /dev/null +++ b/wsrep-lib/include/wsrep/view.hpp @@ -0,0 +1,171 @@ +/* + * Copyright (C) 2018 Codership Oy <info@codership.com> + * + * This file is part of wsrep-lib. + * + * Wsrep-lib is free software: you can redistribute it and/or modify + * it under the terms of the GNU General Public License as published by + * the Free Software Foundation, either version 2 of the License, or + * (at your option) any later version. + * + * Wsrep-lib is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + * + * You should have received a copy of the GNU General Public License + * along with wsrep-lib. If not, see <https://www.gnu.org/licenses/>. + */ + +/** @file view.hpp + * + * + */ + + +#ifndef WSREP_VIEW_HPP +#define WSREP_VIEW_HPP + +#include "id.hpp" +#include "seqno.hpp" +#include "gtid.hpp" +#include <vector> +#include <iostream> + +namespace wsrep +{ + class view + { + public: + enum status + { + primary, + non_primary, + disconnected + }; + class member + { + public: + member(const wsrep::id& id, + const std::string& name, + const std::string& incoming) + : id_(id) + , name_(name) + , incoming_(incoming) + { + } + const wsrep::id& id() const { return id_; } + const std::string& name() const { return name_; } + const std::string& incoming() const { return incoming_; } + private: + wsrep::id id_; + std::string name_; + std::string incoming_; + }; + + view() + : state_id_() + , view_seqno_() + , status_(disconnected) + , capabilities_() + , own_index_(-1) + , protocol_version_(0) + , members_() + { } + view(const wsrep::gtid& state_id, + wsrep::seqno view_seqno, + enum wsrep::view::status status, + int capabilities, + ssize_t own_index, + int protocol_version, + const std::vector<wsrep::view::member>& members) + : state_id_(state_id) + , view_seqno_(view_seqno) + , status_(status) + , capabilities_(capabilities) + , own_index_(own_index) + , protocol_version_(protocol_version) + , members_(members) + { } + + wsrep::gtid state_id() const + { return state_id_; } + + wsrep::seqno view_seqno() const + { return view_seqno_; } + + wsrep::view::status status() const + { return status_; } + + int capabilities() const + { return capabilities_; } + + ssize_t own_index() const + { return own_index_; } + + /** + * Return true if the two views have the same membership + */ + bool equal_membership(const wsrep::view& other) const; + + int protocol_version() const + { return protocol_version_; } + + const std::vector<member>& members() const + { return members_; } + + /** + * Return true if the view is final + */ + bool final() const + { + return (members_.empty() && own_index_ == -1); + } + + /** + * Return member index in the view. + * + * @return Member index if found, -1 if member is not present + * in the view. + */ + int member_index(const wsrep::id& member_id) const; + + /** + * Return true if id is member of this view + */ + bool is_member(const wsrep::id& id) const + { + return member_index(id) != -1; + } + + void print(std::ostream& os) const; + + private: + wsrep::gtid state_id_; + wsrep::seqno view_seqno_; + enum wsrep::view::status status_; + int capabilities_; + ssize_t own_index_; + int protocol_version_; + std::vector<wsrep::view::member> members_; + }; + + static inline + std::ostream& operator<<(std::ostream& os, const wsrep::view& v) + { + v.print(os); return os; + } + + static inline const char* to_c_string(enum wsrep::view::status status) + { + switch(status) + { + case wsrep::view::primary: return "primary"; + case wsrep::view::non_primary: return "non-primary"; + case wsrep::view::disconnected: return "disconnected"; + } + return "invalid status"; + } +} + +#endif // WSREP_VIEW |