mirror of
https://github.com/matrix-construct/construct
synced 2024-09-08 17:55:47 +02:00
191 lines
4 KiB
C++
191 lines
4 KiB
C++
// The Construct
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//
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// Copyright (C) The Construct Developers, Authors & Contributors
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// Copyright (C) 2016-2020 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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decltype(ircd::m::dbs::event_type)
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ircd::m::dbs::event_type;
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decltype(ircd::m::dbs::desc::event_type__block__size)
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ircd::m::dbs::desc::event_type__block__size
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{
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{ "name", "ircd.m.dbs._event_type.block.size" },
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{ "default", 512L },
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};
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decltype(ircd::m::dbs::desc::event_type__meta_block__size)
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ircd::m::dbs::desc::event_type__meta_block__size
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{
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{ "name", "ircd.m.dbs._event_type.meta_block.size" },
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{ "default", long(4_KiB) },
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};
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decltype(ircd::m::dbs::desc::event_type__cache__size)
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ircd::m::dbs::desc::event_type__cache__size
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{
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{
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{ "name", "ircd.m.dbs._event_type.cache.size" },
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{ "default", long(16_MiB) },
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}, []
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{
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const size_t &value{event_type__cache__size};
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db::capacity(db::cache(dbs::event_type), value);
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}
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};
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decltype(ircd::m::dbs::desc::event_type__cache_comp__size)
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ircd::m::dbs::desc::event_type__cache_comp__size
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{
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{
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{ "name", "ircd.m.dbs._event_type.cache_comp.size" },
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{ "default", long(0_MiB) },
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}, []
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{
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const size_t &value{event_type__cache_comp__size};
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db::capacity(db::cache_compressed(dbs::event_type), value);
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}
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};
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const ircd::db::prefix_transform
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ircd::m::dbs::desc::event_type__pfx
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{
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"_event_type",
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[](const string_view &key)
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{
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return has(key, '\0');
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},
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[](const string_view &key)
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{
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return split(key, '\0').first;
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}
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};
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const ircd::db::descriptor
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ircd::m::dbs::desc::event_type
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{
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// name
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"_event_type",
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// explanation
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R"(Index of types of events.
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type | event_idx => --
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The types of events are indexed by this column. All events of a specific type can be
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iterated efficiently. The type string forms the prefix domain.
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)",
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// typing (key, value)
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{
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typeid(string_view), typeid(string_view)
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},
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// options
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{},
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// comparator
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{},
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// prefix transform
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event_type__pfx,
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// drop column
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false,
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// cache size
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bool(cache_enable)? -1 : 0, //uses conf item
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// cache size for compressed assets
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bool(cache_comp_enable)? -1 : 0,
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// bloom filter bits
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0,
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// expect queries hit
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false,
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// block size
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size_t(event_type__block__size),
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// meta_block size
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size_t(event_type__meta_block__size),
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// compression
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"kLZ4Compression;kSnappyCompression"s,
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// compactor
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{},
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// compaction priority algorithm
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"kOldestSmallestSeqFirst"s,
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};
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//
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// indexer
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//
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void
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ircd::m::dbs::_index_event_type(db::txn &txn,
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const event &event,
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const write_opts &opts)
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{
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assert(opts.appendix.test(appendix::EVENT_TYPE));
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assert(json::get<"type"_>(event));
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assert(opts.event_idx);
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thread_local char buf[EVENT_TYPE_KEY_MAX_SIZE];
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const string_view &key
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{
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event_type_key(buf, at<"type"_>(event), opts.event_idx)
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};
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db::txn::append
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{
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txn, dbs::event_type,
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{
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opts.op, key
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}
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};
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}
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//
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// key
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//
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std::tuple<ircd::m::event::idx>
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ircd::m::dbs::event_type_key(const string_view &amalgam)
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{
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assert(size(amalgam) == sizeof(event::idx) + 1);
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const auto &key
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{
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amalgam.substr(1)
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};
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assert(size(key) == sizeof(event::idx));
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return
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{
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byte_view<event::idx>(key)
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};
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}
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ircd::string_view
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ircd::m::dbs::event_type_key(const mutable_buffer &out_,
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const string_view &type,
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const event::idx &event_idx)
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{
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assert(size(out_) >= EVENT_TYPE_KEY_MAX_SIZE);
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mutable_buffer out{out_};
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consume(out, copy(out, trunc(type, event::TYPE_MAX_SIZE)));
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consume(out, copy(out, '\0'));
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consume(out, copy(out, byte_view<string_view>(event_idx)));
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return { data(out_), data(out) };
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}
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