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construct/matrix/dbs_event_json.cc

176 lines
4 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_json)
ircd::m::dbs::event_json;
decltype(ircd::m::dbs::desc::event_json__block__size)
ircd::m::dbs::desc::event_json__block__size
{
{ "name", "ircd.m.dbs._event_json.block.size" },
{ "default", long(1_KiB) },
};
decltype(ircd::m::dbs::desc::event_json__meta_block__size)
ircd::m::dbs::desc::event_json__meta_block__size
{
{ "name", "ircd.m.dbs._event_json.meta_block.size" },
{ "default", 512L },
};
decltype(ircd::m::dbs::desc::event_json__cache__size)
ircd::m::dbs::desc::event_json__cache__size
{
{
{ "name", "ircd.m.dbs._event_json.cache.size" },
{ "default", long(128_MiB) },
}, []
{
const size_t &value{event_json__cache__size};
db::capacity(db::cache(dbs::event_json), value);
}
};
decltype(ircd::m::dbs::desc::event_json__cache_comp__size)
ircd::m::dbs::desc::event_json__cache_comp__size
{
{
{ "name", "ircd.m.dbs._event_json.cache_comp.size" },
{ "default", long(0_MiB) },
}, []
{
const size_t &value{event_json__cache_comp__size};
db::capacity(db::cache_compressed(dbs::event_json), value);
}
};
decltype(ircd::m::dbs::desc::event_json__bloom__bits)
ircd::m::dbs::desc::event_json__bloom__bits
{
{ "name", "ircd.m.dbs._event_json.bloom.bits" },
{ "default", 0L },
};
const ircd::db::descriptor
ircd::m::dbs::desc::event_json
{
// name
"_event_json",
// explanation
R"(Full JSON object of an event.
event_idx => event_json
)",
// typing (key, value)
{
typeid(uint64_t), typeid(string_view)
},
// options
{},
// comparator
{},
// prefix transform
{},
// 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
size_t(event_json__bloom__bits),
// expect queries hit
true,
// block size
size_t(event_json__block__size),
// meta_block size
size_t(event_json__meta_block__size),
// compression
"default"s,
// compactor
{},
// compaction priority algorithm
"Universal"s,
// target_file_size
{
2_GiB, // base
1L, // multiplier
},
};
//
// indexer
//
void
ircd::m::dbs::_index_event_json(db::txn &txn,
const event &event,
const write_opts &opts)
{
const ctx::critical_assertion ca;
thread_local char buf[m::event::MAX_SIZE];
assert(opts.appendix.test(appendix::EVENT_JSON));
assert(opts.event_idx);
const string_view &key
{
byte_view<string_view>(opts.event_idx)
};
const string_view &val
{
// If an already-strung json::object is carried by the event and
// the opts allow us, we use it directly. This is not the default
// path unless the developer knows the source JSON is good enough
// to store directly.
opts.op == db::op::SET && event.source && opts.json_source?
string_view{event.source}:
// If an already-strung json::object is carried by the event we
// re-stringify it into a temporary buffer. This is the common case
// because the original source might be crap JSON w/ spaces etc.
opts.op == db::op::SET && event.source?
json::stringify(mutable_buffer{buf}, event.source):
// If no source was given with the event we can generate it.
opts.op == db::op::SET?
json::stringify(mutable_buffer{buf}, event):
// Empty value; generally for a non-SET db::op
string_view{}
};
db::txn::append
{
txn, event_json,
{
opts.op, // db::op
key, // key
val, // val
}
};
}