350 lines
7.8 KiB
C++
350 lines
7.8 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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namespace ircd::m::dbs
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{
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static bool room_state_space__cmp_lt(const string_view &, const string_view &);
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}
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decltype(ircd::m::dbs::room_state_space)
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ircd::m::dbs::room_state_space;
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decltype(ircd::m::dbs::desc::room_state_space__comp)
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ircd::m::dbs::desc::room_state_space__comp
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{
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{ "name", "ircd.m.dbs._room_state_space.comp" },
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{ "default", "default" },
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};
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decltype(ircd::m::dbs::desc::room_state_space__block__size)
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ircd::m::dbs::desc::room_state_space__block__size
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{
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{ "name", "ircd.m.dbs._room_state_space.block.size" },
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{ "default", 512L },
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};
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decltype(ircd::m::dbs::desc::room_state_space__meta_block__size)
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ircd::m::dbs::desc::room_state_space__meta_block__size
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{
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{ "name", "ircd.m.dbs._room_state_space.meta_block.size" },
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{ "default", long(8_KiB) },
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};
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decltype(ircd::m::dbs::desc::room_state_space__cache__size)
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ircd::m::dbs::desc::room_state_space__cache__size
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{
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{
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{ "name", "ircd.m.dbs._room_state_space.cache.size" },
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{ "default", long(32_MiB) },
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},
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[](conf::item<void> &)
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{
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const size_t &value{room_state_space__cache__size};
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db::capacity(db::cache(dbs::room_state_space), value);
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}
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};
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decltype(ircd::m::dbs::desc::room_state_space__cache_comp__size)
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ircd::m::dbs::desc::room_state_space__cache_comp__size
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{
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{
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{ "name", "ircd.m.dbs._room_state_space.cache_comp.size" },
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{ "default", long(8_MiB) },
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},
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[](conf::item<void> &)
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{
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const size_t &value{room_state_space__cache_comp__size};
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db::capacity(db::cache_compressed(dbs::room_state_space), value);
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}
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};
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decltype(ircd::m::dbs::desc::room_state_space__bloom__bits)
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ircd::m::dbs::desc::room_state_space__bloom__bits
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{
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{ "name", "ircd.m.dbs._room_state_space.bloom.bits" },
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{ "default", 0L },
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};
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const ircd::db::comparator
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ircd::m::dbs::desc::room_state_space__cmp
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{
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"_room_state_space",
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room_state_space__cmp_lt,
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db::cmp_string_view::equal,
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};
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const ircd::db::prefix_transform
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ircd::m::dbs::desc::room_state_space__pfx
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{
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"_room_state_space",
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[](const string_view &key)
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{
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return has(key, "\0"_sv);
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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::room_state_space
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{
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// name
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"_room_state_space",
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// explanation
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R"(All states of the room.
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)",
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// typing (key, value)
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{
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typeid(string_view), typeid(uint64_t)
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},
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// options
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{},
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// comparator
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room_state_space__cmp,
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// prefix transform
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room_state_space__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,
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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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size_t(room_state_space__bloom__bits),
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// expect queries hit
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false,
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// block size
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size_t(room_state_space__block__size),
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// meta_block size
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size_t(room_state_space__meta_block__size),
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// compression
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string_view{room_state_space__comp},
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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_room_state_space(db::txn &txn,
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const event &event,
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const opts &opts)
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{
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assert(opts.appendix.test(appendix::ROOM_STATE_SPACE));
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// Ignore non-state
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if(!defined(json::get<"state_key"_>(event)))
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return;
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const ctx::critical_assertion ca;
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thread_local char buf[ROOM_STATE_SPACE_KEY_MAX_SIZE];
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const string_view &key
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{
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room_state_space_key(buf, at<"room_id"_>(event), at<"type"_>(event), at<"state_key"_>(event), at<"depth"_>(event), opts.event_idx)
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};
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db::txn::append
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{
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txn, room_state_space,
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{
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opts.op,
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key,
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}
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};
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}
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//
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// cmp
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//
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bool
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ircd::m::dbs::room_state_space__cmp_lt(const string_view &a,
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const string_view &b)
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{
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static const auto &pt
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{
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desc::room_state_space__pfx
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};
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const string_view pre[2]
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{
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pt.get(a),
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pt.get(b),
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};
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if(size(pre[0]) != size(pre[1]))
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return size(pre[0]) < size(pre[1]);
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if(pre[0] != pre[1])
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return pre[0] < pre[1];
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const string_view post[2]
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{
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a.substr(size(pre[0])),
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b.substr(size(pre[1])),
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};
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// These conditions are matched on some queries when the user only
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// supplies a room_id.
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if(empty(post[0]))
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return true;
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if(empty(post[1]))
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return false;
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// Decompose the postfix of the key for granular sorting
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const auto &[type_a, state_key_a, depth_a, event_idx_a]
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{
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room_state_space_key(post[0])
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};
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const auto &[type_b, state_key_b, depth_b, event_idx_b]
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{
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room_state_space_key(post[1])
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};
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// type
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if(type_a < type_b)
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return true;
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else if(type_a > type_b)
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return false;
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// state_key
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if(state_key_a < state_key_b)
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return true;
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else if(state_key_a > state_key_b)
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return false;
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// depth (ORDER IS DESCENDING!)
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if(uint64_t(depth_a) > uint64_t(depth_b))
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return true;
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else if(uint64_t(depth_a) < uint64_t(depth_b))
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return false;
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// event_idx (ORDER IS DESCENDING!)
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if(event_idx_a > event_idx_b)
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return true;
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else if(event_idx_a < event_idx_b)
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return false;
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return false;
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}
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//
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// key
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//
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ircd::m::dbs::room_state_space_tuple
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ircd::m::dbs::room_state_space_key(const string_view &amalgam)
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{
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const auto &key
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{
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lstrip(amalgam, '\0')
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};
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const auto &[type, after_type]
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{
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split(key, '\0')
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};
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const auto &[state_key, after_state_key]
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{
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split(after_type, '\0')
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};
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const int64_t &depth
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{
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size(after_state_key) >= 8?
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int64_t(byte_view<int64_t>(after_state_key.substr(0, 8))):
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-1L
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};
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const event::idx &event_idx
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{
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size(after_state_key) >= 16?
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event::idx(byte_view<event::idx>(after_state_key.substr(8, 8))):
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0UL
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};
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return
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{
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type, state_key, depth, event_idx
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};
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}
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ircd::string_view
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ircd::m::dbs::room_state_space_key(const mutable_buffer &out_,
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const id::room &room_id)
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{
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return room_state_space_key(out_, room_id, string_view{}, string_view{}, -1L, 0L);
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}
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ircd::string_view
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ircd::m::dbs::room_state_space_key(const mutable_buffer &out_,
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const id::room &room_id,
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const string_view &type)
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{
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return room_state_space_key(out_, room_id, type, string_view{}, -1L, 0L);
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}
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ircd::string_view
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ircd::m::dbs::room_state_space_key(const mutable_buffer &out_,
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const id::room &room_id,
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const string_view &type,
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const string_view &state_key)
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{
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return room_state_space_key(out_, room_id, type, state_key, -1L, 0L);
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}
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ircd::string_view
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ircd::m::dbs::room_state_space_key(const mutable_buffer &out_,
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const id::room &room_id,
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const string_view &type,
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const string_view &state_key,
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const int64_t &depth,
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const event::idx &event_idx)
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{
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mutable_buffer out{out_};
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consume(out, copy(out, room_id));
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consume(out, copy(out, '\0'));
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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, trunc(state_key, event::STATE_KEY_MAX_SIZE)));
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consume(out, copy(out, '\0'));
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consume(out, copy(out, byte_view<string_view>(depth)));
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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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