mirror of
https://github.com/matrix-construct/construct
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105 lines
3.6 KiB
C++
105 lines
3.6 KiB
C++
// Matrix Construct
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//
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// Copyright (C) Matrix Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2018 Jason Volk <jason@zemos.net>
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//
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// Permission to use, copy, modify, and/or distribute this software for any
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// purpose with or without fee is hereby granted, provided that the above
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// copyright notice and this permission notice is present in all copies. The
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// full license for this software is available in the LICENSE file.
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#pragma once
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#define HAVE_IRCD_DB_DATABASE_H
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namespace ircd::db
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{
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struct database;
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template<class R = uint64_t> R property(database &, const string_view &name);
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template<> uint64_t property(database &, const string_view &name);
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const std::string &name(const database &);
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uint64_t sequence(const database &); // Latest sequence number
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void sync(database &); // Sync the write log (all columns)
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}
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/// Database instance
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///
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/// There can be only one instance of this class for each database, so it is
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/// always shared and must be make_shared(). The database is open when an
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/// instance is constructed and closed when the instance destructs.
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///
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/// The construction must have the same consistent descriptor set used every
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/// time otherwise bad things happen.
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///
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/// The instance registers and deregisters itself in a global set of open
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/// databases and can be found that way if necessary.
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///
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struct ircd::db::database
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:std::enable_shared_from_this<database>
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{
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struct descriptor;
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struct options;
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struct events;
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struct stats;
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struct logs;
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struct mergeop;
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struct snapshot;
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struct comparator;
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struct prefix_transform;
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struct column;
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struct env;
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using description = std::vector<descriptor>;
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// central collection of open databases for iteration (non-owning)
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static std::map<string_view, database *> dbs;
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std::string name;
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std::string path;
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std::string optstr;
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std::shared_ptr<struct env> env;
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std::shared_ptr<struct logs> logs;
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std::shared_ptr<struct stats> stats;
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std::shared_ptr<struct events> events;
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std::shared_ptr<struct mergeop> mergeop;
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std::shared_ptr<rocksdb::Cache> cache;
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std::vector<descriptor> descriptors;
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std::vector<string_view> column_names;
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std::unordered_map<string_view, size_t> column_index;
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std::vector<std::shared_ptr<column>> columns;
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custom_ptr<rocksdb::DB> d;
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unique_const_iterator<decltype(dbs)> dbs_it;
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operator std::shared_ptr<database>() { return shared_from_this(); }
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operator const rocksdb::DB &() const { return *d; }
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operator rocksdb::DB &() { return *d; }
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const column &operator[](const uint32_t &id) const;
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const column &operator[](const string_view &name) const;
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column &operator[](const uint32_t &id);
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column &operator[](const string_view &name);
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// [SET] Perform operations in a sequence as a single transaction.
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void operator()(const sopts &, const delta *const &begin, const delta *const &end);
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void operator()(const sopts &, const std::initializer_list<delta> &);
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void operator()(const sopts &, const delta &);
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void operator()(const delta *const &begin, const delta *const &end);
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void operator()(const std::initializer_list<delta> &);
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void operator()(const delta &);
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database(std::string name,
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std::string options,
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description);
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database(std::string name,
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std::string options = {});
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database() = default;
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database(database &&) = delete;
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database(const database &) = delete;
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~database() noexcept;
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// Get this instance from any column.
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static const database &get(const column &);
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static database &get(column &);
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};
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