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ircd:Ⓜ️:dbs: Add back the sequential state index for present room state.

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This commit is contained in:
Jason Volk 2018-03-03 23:39:24 -08:00
parent 8bb31107bd
commit 472aaecb0f
2 changed files with 163 additions and 50 deletions
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9
include/ircd/m/dbs.h
View file

@ -27,8 +27,13 @@ namespace ircd::m::dbs
extern db::column state_node;
extern db::index room_events;
extern db::index room_origins;
extern db::index room_state;
// Lowlevel util
string_view room_state_key(const mutable_buffer &out, const id::room &, const string_view &type, const string_view &state_key);
string_view room_state_key(const mutable_buffer &out, const id::room &, const string_view &type);
std::tuple<string_view, string_view> room_state_key(const string_view &amalgam);
string_view room_origins_key(const mutable_buffer &out, const id::room &, const string_view &origin, const id::user &member);
string_view room_events_key(const mutable_buffer &out, const id::room &, const uint64_t &depth, const id::event &);
string_view room_events_key(const mutable_buffer &out, const id::room &, const uint64_t &depth);
@ -52,6 +57,7 @@ struct ircd::m::dbs::write_opts
string_view root_in;
mutable_buffer root_out;
bool present {true};
bool history {true};
};
namespace ircd::m::dbs::desc
@ -84,6 +90,9 @@ namespace ircd::m::dbs::desc
extern const database::descriptor events__room_events;
extern const db::prefix_transform events__room_origins__pfx;
extern const database::descriptor events__room_origins;
extern const db::prefix_transform events__room_state__pfx;
extern const database::descriptor events__room_state;
}
struct ircd::m::dbs::init

204
ircd/m/dbs.cc
View file

@ -38,6 +38,11 @@ decltype(ircd::m::dbs::room_origins)
ircd::m::dbs::room_origins
{};
/// Linkage for a reference to the room_state column
decltype(ircd::m::dbs::room_state)
ircd::m::dbs::room_state
{};
//
// init
//
@ -64,6 +69,7 @@ ircd::m::dbs::init::init()
state_node = db::column{*events, "_state_node"};
room_events = db::index{*events, "_room_events"};
room_origins = db::index{*events, "_room_origins"};
room_state = db::index{*events, "_room_state"};
}
/// Shuts down the m::dbs subsystem; closes the events database. The extern
@ -75,6 +81,7 @@ noexcept
state_node = {};
room_events = {};
room_origins = {};
room_state = {};
for(auto &column : event_column)
column = {};
@ -84,6 +91,7 @@ noexcept
namespace ircd::m::dbs
{
static void _index__room_state(db::txn &, const event &, const write_opts &);
static void _index__room_events(db::txn &, const event &, const write_opts &, const string_view &);
static void _index__room_origins(db::txn &, const event &, const write_opts &);
static string_view _index_state(db::txn &, const event &, const write_opts &);
@ -183,14 +191,17 @@ try
at<"room_id"_>(event)
};
const auto &new_root
const string_view &new_root
{
state::insert(txn, opts.root_out, opts.root_in, event)
opts.history?
state::insert(txn, opts.root_out, opts.root_in, event):
opts.root_in
};
_index__room_events(txn, event, opts, new_root);
_index__room_origins(txn, event, opts);
return opts.root_in;
_index__room_state(txn, event, opts);
return new_root;
}
catch(const std::exception &e)
{
@ -281,6 +292,46 @@ ircd::m::dbs::_index__room_origins(db::txn &txn,
};
}
/// Adds the entry for the room_origins column into the txn.
/// This only is affected if opts.present=true
void
ircd::m::dbs::_index__room_state(db::txn &txn,
const event &event,
const write_opts &opts)
{
if(!opts.present)
return;
const ctx::critical_assertion ca;
thread_local char buf[768];
const string_view &key
{
room_state_key(buf, at<"room_id"_>(event), at<"type"_>(event), at<"state_key"_>(event))
};
const string_view &val
{
at<"event_id"_>(event)
};
const db::op op
{
at<"type"_>(event) != "m.room.redaction"?
db::op::SET:
db::op::DELETE
};
db::txn::append
{
txn, room_state,
{
op,
key,
val, // should be ignored on DELETE
}
};
}
ircd::string_view
ircd::m::dbs::state_root(const mutable_buffer &out,
const event &event)
@ -662,6 +713,102 @@ ircd::m::dbs::desc::events__room_origins
events__room_origins__pfx,
};
//
// state sequential
//
/// prefix transform for type,state_key in room_id
///
/// This transform is special for concatenating room_id with type and state_key
/// in that order with prefix being the room_id (this may change to room_id+
/// type
///
const ircd::db::prefix_transform
ircd::m::dbs::desc::events__room_state__pfx
{
"_room_state",
[](const string_view &key)
{
return key.find("\0"_sv) != key.npos;
},
[](const string_view &key)
{
return split(key, "\0"_sv).first;
}
};
ircd::string_view
ircd::m::dbs::room_state_key(const mutable_buffer &out_,
const id::room &room_id,
const string_view &type,
const string_view &state_key)
{
mutable_buffer out{out_};
consume(out, copy(out, room_id));
consume(out, copy(out, "\0"_sv));
consume(out, copy(out, type));
consume(out, copy(out, "\0"_sv));
consume(out, copy(out, state_key));
return { data(out_), data(out) };
}
ircd::string_view
ircd::m::dbs::room_state_key(const mutable_buffer &out_,
const id::room &room_id,
const string_view &type)
{
mutable_buffer out{out_};
consume(out, copy(out, room_id));
consume(out, copy(out, "\0"_sv));
consume(out, copy(out, type));
return { data(out_), data(out) };
}
std::tuple<ircd::string_view, ircd::string_view>
ircd::m::dbs::room_state_key(const string_view &amalgam)
{
const auto &key
{
lstrip(amalgam, "\0"_sv)
};
const auto &s
{
split(key, "\0"_sv)
};
return
{
s.first, s.second
};
}
const ircd::database::descriptor
ircd::m::dbs::desc::events__room_state
{
// name
"_room_state",
// explanation
R"(### developer note:
)",
// typing (key, value)
{
typeid(ircd::string_view), typeid(ircd::string_view)
},
// options
{},
// comparator
{},
// prefix transform
events__room_state__pfx,
};
//
// Direct column descriptors
//
@ -1155,53 +1302,6 @@ const ircd::db::prefix_transform room_id_in
}
};
/// prefix transform for type,state_key in room_id
///
/// This transform is special for concatenating room_id with type and state_key
/// in that order with prefix being the room_id (this may change to room_id+
/// type
///
/// TODO: arbitrary type strings will have character conflicts. must address
/// TODO: with grammars.
const ircd::db::prefix_transform type_state_key_in_room_id
{
"type,state_key in room_id",
[](const ircd::string_view &key)
{
return key.find("..") != key.npos;
},
[](const ircd::string_view &key)
{
return split(key, "..").first;
}
};
const ircd::database::descriptor
event_id_for_type_state_key_in_room_id
{
// name
"event_id for type,state_key in room_id",
// explanation
R"(### developer note:
)",
// typing (key, value)
{
typeid(ircd::string_view), typeid(ircd::string_view)
},
// options
{},
// comparator
{},
// prefix transform
type_state_key_in_room_id
};
const ircd::database::descriptor
prev_event_id_for_event_id_in_room_id
{
@ -1325,4 +1425,8 @@ ircd::m::dbs::desc::events
// (room_id, origin) => ()
// Sequence of all PRESENTLY JOINED origins for a room.
events__room_origins,
// (room_id, type, state_key) => (event_id)
// Sequence of the PRESENT STATE of the room.
events__room_state,
};