mirror of
https://github.com/matrix-construct/construct
synced 2024-10-30 10:28:55 +01:00
311 lines
6.8 KiB
C++
311 lines
6.8 KiB
C++
// The Construct
|
|
//
|
|
// Copyright (C) The Construct Developers, Authors & Contributors
|
|
// Copyright (C) 2016-2020 Jason Volk <jason@zemos.net>
|
|
//
|
|
// Permission to use, copy, modify, and/or distribute this software for any
|
|
// purpose with or without fee is hereby granted, provided that the above
|
|
// copyright notice and this permission notice is present in all copies. The
|
|
// full license for this software is available in the LICENSE file.
|
|
|
|
decltype(ircd::m::dbs::event_horizon)
|
|
ircd::m::dbs::event_horizon;
|
|
|
|
decltype(ircd::m::dbs::desc::event_horizon__block__size)
|
|
ircd::m::dbs::desc::event_horizon__block__size
|
|
{
|
|
{ "name", "ircd.m.dbs._event_horizon.block.size" },
|
|
{ "default", 512L },
|
|
};
|
|
|
|
decltype(ircd::m::dbs::desc::event_horizon__meta_block__size)
|
|
ircd::m::dbs::desc::event_horizon__meta_block__size
|
|
{
|
|
{ "name", "ircd.m.dbs._event_horizon.meta_block.size" },
|
|
{ "default", 1024L },
|
|
};
|
|
|
|
decltype(ircd::m::dbs::desc::event_horizon__cache__size)
|
|
ircd::m::dbs::desc::event_horizon__cache__size
|
|
{
|
|
{
|
|
{ "name", "ircd.m.dbs._event_horizon.cache.size" },
|
|
{ "default", long(16_MiB) },
|
|
}, []
|
|
{
|
|
const size_t &value{event_horizon__cache__size};
|
|
db::capacity(db::cache(dbs::event_horizon), value);
|
|
}
|
|
};
|
|
|
|
decltype(ircd::m::dbs::desc::event_horizon__cache_comp__size)
|
|
ircd::m::dbs::desc::event_horizon__cache_comp__size
|
|
{
|
|
{
|
|
{ "name", "ircd.m.dbs._event_horizon.cache_comp.size" },
|
|
{ "default", long(0_MiB) },
|
|
}, []
|
|
{
|
|
const size_t &value{event_horizon__cache_comp__size};
|
|
db::capacity(db::cache_compressed(dbs::event_horizon), value);
|
|
}
|
|
};
|
|
|
|
const ircd::db::prefix_transform
|
|
ircd::m::dbs::desc::event_horizon__pfx
|
|
{
|
|
"_event_horizon",
|
|
|
|
[](const string_view &key)
|
|
{
|
|
return has(key, '\0');
|
|
},
|
|
|
|
[](const string_view &key)
|
|
{
|
|
assert(size(key) >= sizeof(event::idx));
|
|
return split(key, '\0').first;
|
|
}
|
|
};
|
|
|
|
const ircd::db::descriptor
|
|
ircd::m::dbs::desc::event_horizon
|
|
{
|
|
// name
|
|
"_event_horizon",
|
|
|
|
// explanation
|
|
R"(Unresolved references in the reverse reference graph of events.
|
|
|
|
event_id | event_idx => --
|
|
|
|
The first part of the key is an event_id which the server does not have.
|
|
The suffix of the key is the index number of an event which the server
|
|
does have and it contains a reference to event_id.
|
|
|
|
We use the information in this column to find all of the events which
|
|
have an unresolved reference to this event and complete the holes in the
|
|
event_refs graph which could not be completed without this event.
|
|
|
|
When a new event is written to the database the event_horizon column is
|
|
queried seeking the event's ID. Each entry in event_horizon is the index
|
|
of an event which we previously wrote to the database without knowing the
|
|
index of the event currently being written (an out-of-order write).
|
|
|
|
)",
|
|
|
|
// typing (key, value)
|
|
{
|
|
typeid(string_view), typeid(string_view)
|
|
},
|
|
|
|
// options
|
|
{},
|
|
|
|
// comparator
|
|
{},
|
|
|
|
// prefix transform
|
|
event_horizon__pfx,
|
|
|
|
// drop column
|
|
false,
|
|
|
|
// cache size
|
|
bool(cache_enable)? -1 : 0, //uses conf item
|
|
|
|
// cache size for compressed assets
|
|
bool(cache_comp_enable)? -1 : 0,
|
|
|
|
// bloom filter bits
|
|
0,
|
|
|
|
// expect queries hit
|
|
false,
|
|
|
|
// block size
|
|
size_t(event_horizon__block__size),
|
|
|
|
// meta_block size
|
|
size_t(event_horizon__meta_block__size),
|
|
|
|
// compression
|
|
"kLZ4Compression;kSnappyCompression"s,
|
|
|
|
// compactor
|
|
{},
|
|
|
|
// compaction priority algorithm
|
|
"kOldestSmallestSeqFirst"s,
|
|
};
|
|
|
|
//
|
|
// indexer
|
|
//
|
|
|
|
// NOTE: QUERY
|
|
void
|
|
ircd::m::dbs::_index_event_horizon_resolve(db::txn &txn,
|
|
const event &event,
|
|
const write_opts &opts)
|
|
{
|
|
char buf[EVENT_HORIZON_KEY_MAX_SIZE];
|
|
assert(opts.appendix.test(appendix::EVENT_HORIZON_RESOLVE));
|
|
assert(opts.event_idx != 0);
|
|
assert(event.event_id);
|
|
const string_view &key
|
|
{
|
|
event_horizon_key(buf, event.event_id)
|
|
};
|
|
|
|
auto it
|
|
{
|
|
dbs::event_horizon.begin(key)
|
|
};
|
|
|
|
for(; it; ++it)
|
|
{
|
|
const auto parts
|
|
{
|
|
event_horizon_key(it->first)
|
|
};
|
|
|
|
const auto &event_idx
|
|
{
|
|
std::get<0>(parts)
|
|
};
|
|
|
|
assert(event_idx != 0);
|
|
assert(event_idx != opts.event_idx);
|
|
const event::fetch _event
|
|
{
|
|
std::nothrow, event_idx
|
|
};
|
|
|
|
if(!_event.valid)
|
|
{
|
|
log::dwarning
|
|
{
|
|
log, "Horizon resolve for %s @%lu not possible @%lu",
|
|
string_view{event.event_id},
|
|
opts.event_idx,
|
|
event_idx,
|
|
};
|
|
|
|
continue;
|
|
}
|
|
|
|
log::debug
|
|
{
|
|
log, "Horizon resolve for %s @%lu; remisé %s @%lu",
|
|
string_view{event.event_id},
|
|
opts.event_idx,
|
|
string_view{_event.event_id},
|
|
event_idx,
|
|
};
|
|
|
|
// Make the references on behalf of the future event
|
|
write_opts _opts;
|
|
_opts.op = opts.op;
|
|
_opts.event_idx = event_idx;
|
|
_opts.appendix.reset();
|
|
_opts.appendix.set(appendix::EVENT_REFS);
|
|
_opts.appendix.set(appendix::ROOM_REDACT);
|
|
_opts.appendix.set(appendix::ROOM_HEAD_RESOLVE);
|
|
_opts.event_refs = opts.horizon_resolve;
|
|
_opts.interpose = &txn;
|
|
write(txn, _event, _opts);
|
|
|
|
// Delete the event_horizon entry after resolving.
|
|
thread_local char buf[EVENT_HORIZON_KEY_MAX_SIZE];
|
|
const string_view &key
|
|
{
|
|
event_horizon_key(buf, event.event_id, event_idx)
|
|
};
|
|
|
|
db::txn::append
|
|
{
|
|
txn, dbs::event_horizon,
|
|
{
|
|
opts.op == db::op::SET?
|
|
db::op::DELETE:
|
|
db::op::SET,
|
|
key
|
|
}
|
|
};
|
|
}
|
|
}
|
|
|
|
void
|
|
ircd::m::dbs::_index_event_horizon(db::txn &txn,
|
|
const event &event,
|
|
const write_opts &opts,
|
|
const m::event::id &unresolved_id)
|
|
{
|
|
thread_local char buf[EVENT_HORIZON_KEY_MAX_SIZE];
|
|
assert(opts.appendix.test(appendix::EVENT_HORIZON));
|
|
assert(opts.event_idx != 0 && unresolved_id);
|
|
const string_view &key
|
|
{
|
|
event_horizon_key(buf, unresolved_id, opts.event_idx)
|
|
};
|
|
|
|
db::txn::append
|
|
{
|
|
txn, dbs::event_horizon,
|
|
{
|
|
opts.op, key
|
|
}
|
|
};
|
|
}
|
|
|
|
//
|
|
// key
|
|
//
|
|
|
|
std::tuple<ircd::m::event::idx>
|
|
ircd::m::dbs::event_horizon_key(const string_view &amalgam)
|
|
{
|
|
assert(size(amalgam) == 1 + sizeof(event::idx));
|
|
assert(amalgam[0] == '\0');
|
|
|
|
const byte_view<event::idx> &event_idx
|
|
{
|
|
amalgam.substr(1)
|
|
};
|
|
|
|
return
|
|
{
|
|
static_cast<event::idx>(event_idx)
|
|
};
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::m::dbs::event_horizon_key(const mutable_buffer &out,
|
|
const event::id &event_id)
|
|
{
|
|
return event_horizon_key(out, event_id, 0UL);
|
|
}
|
|
|
|
ircd::string_view
|
|
ircd::m::dbs::event_horizon_key(const mutable_buffer &out,
|
|
const event::id &event_id,
|
|
const event::idx &event_idx)
|
|
{
|
|
mutable_buffer buf(out);
|
|
consume(buf, copy(buf, event_id));
|
|
|
|
if(event_idx)
|
|
{
|
|
consume(buf, copy(buf, '\0'));
|
|
consume(buf, copy(buf, byte_view<string_view>(event_idx)));
|
|
}
|
|
|
|
const string_view ret
|
|
{
|
|
data(out), data(buf)
|
|
};
|
|
|
|
assert(size(ret) == size(event_id) || size(ret) == size(event_id) + sizeof(event::idx) + 1);
|
|
return ret;
|
|
}
|