tdlight/td/telegram/DialogDb.cpp

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//
// Copyright Aliaksei Levin (levlam@telegram.org), Arseny Smirnov (arseny30@gmail.com) 2014-2018
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
//
#include "td/telegram/DialogDb.h"
#include "td/telegram/Version.h"
#include "td/actor/actor.h"
#include "td/actor/SchedulerLocalStorage.h"
#include "td/db/SqliteDb.h"
#include "td/db/SqliteKeyValue.h"
#include "td/db/SqliteStatement.h"
#include "td/utils/format.h"
#include "td/utils/logging.h"
#include "td/utils/ScopeGuard.h"
#include "td/utils/Time.h"
namespace td {
// NB: must happen inside a transaction
Status init_dialog_db(SqliteDb &db, int32 version, bool &was_created) {
LOG(INFO) << "Init dialog database " << tag("version", version);
was_created = false;
// Check if database exists
TRY_RESULT(has_table, db.has_table("dialogs"));
if (!has_table) {
version = 0;
}
if (version < static_cast<int32>(DbVersion::DialogDbCreated) || version > current_db_version()) {
TRY_STATUS(drop_dialog_db(db, version));
version = 0;
}
auto create_notification_group_table = [&]() {
return db.exec(
"CREATE TABLE IF NOT EXISTS notification_groups (notification_group_id INT4 PRIMARY KEY, dialog_id "
"INT8, last_notification_date INT4)");
};
auto create_last_notification_date_index = [&]() {
return db.exec(
"CREATE INDEX IF NOT EXISTS notification_group_by_last_notification_date ON notification_groups "
"(last_notification_date, dialog_id, notification_group_id) WHERE last_notification_date IS NOT NULL");
};
if (version == 0) {
LOG(INFO) << "Create new dialog database";
was_created = true;
TRY_STATUS(
db.exec("CREATE TABLE IF NOT EXISTS dialogs (dialog_id INT8 PRIMARY KEY, dialog_order INT8, data BLOB)"));
TRY_STATUS(db.exec("CREATE INDEX IF NOT EXISTS dialog_by_dialog_order ON dialogs (dialog_order, dialog_id)"));
TRY_STATUS(create_notification_group_table());
TRY_STATUS(create_last_notification_date_index());
version = current_db_version();
}
if (version < static_cast<int32>(DbVersion::AddNotificationsSupport)) {
TRY_STATUS(create_notification_group_table());
TRY_STATUS(create_last_notification_date_index());
}
return Status::OK();
}
// NB: must happen inside a transaction
Status drop_dialog_db(SqliteDb &db, int version) {
if (version < static_cast<int32>(DbVersion::DialogDbCreated)) {
LOG(WARNING) << "Drop old pmc dialog_db";
SqliteKeyValue kv;
kv.init_with_connection(db.clone(), "common").ensure();
kv.erase_by_prefix("di");
}
LOG(WARNING) << "Drop dialog_db " << tag("version", version) << tag("current_db_version", current_db_version());
auto status = db.exec("DROP TABLE IF EXISTS dialogs");
TRY_STATUS(db.exec("DROP TABLE IF EXISTS notification_groups"));
return status;
}
class DialogDbImpl : public DialogDbSyncInterface {
public:
explicit DialogDbImpl(SqliteDb db) : db_(std::move(db)) {
init().ensure();
}
Status init() {
TRY_RESULT(add_dialog_stmt, db_.get_statement("INSERT OR REPLACE INTO dialogs VALUES(?1, ?2, ?3)"));
TRY_RESULT(add_notification_group_stmt,
db_.get_statement("INSERT OR REPLACE INTO notification_groups VALUES(?1, ?2, ?3)"));
TRY_RESULT(get_dialog_stmt, db_.get_statement("SELECT data FROM dialogs WHERE dialog_id = ?1"));
TRY_RESULT(get_dialogs_stmt, db_.get_statement("SELECT data, dialog_id, dialog_order FROM dialogs WHERE "
"dialog_order < ?1 OR (dialog_order = ?1 AND dialog_id < ?2) ORDER "
"BY dialog_order DESC, dialog_id DESC LIMIT ?3"));
TRY_RESULT(
get_notification_groups_by_last_notification_date_stmt,
db_.get_statement("SELECT notification_group_id, dialog_id, last_notification_date FROM notification_groups "
"WHERE last_notification_date < ?1 OR (last_notification_date = ?1 "
"AND (dialog_id < ?2 OR (dialog_id = ?2 AND notification_group_id < ?3))) ORDER BY "
"last_notification_date DESC, dialog_id DESC LIMIT ?4"));
// "WHERE (last_notification_date, dialog_id, notification_group_id) < (?1, ?2, ?3) ORDER BY "
// "last_notification_date DESC, dialog_id DESC, notification_group_id DESC LIMIT ?4"));
TRY_RESULT(
get_notification_group_stmt,
db_.get_statement(
"SELECT dialog_id, last_notification_date FROM notification_groups WHERE notification_group_id = ?1"));
add_dialog_stmt_ = std::move(add_dialog_stmt);
add_notification_group_stmt_ = std::move(add_notification_group_stmt);
get_dialog_stmt_ = std::move(get_dialog_stmt);
get_dialogs_stmt_ = std::move(get_dialogs_stmt);
get_notification_groups_by_last_notification_date_stmt_ =
std::move(get_notification_groups_by_last_notification_date_stmt);
get_notification_group_stmt_ = std::move(get_notification_group_stmt);
// LOG(ERROR) << get_dialog_stmt_.explain().ok();
// LOG(ERROR) << get_dialogs_stmt_.explain().ok();
// LOG(ERROR) << get_notification_groups_by_last_notification_date_stmt_.explain().ok();
// LOG(ERROR) << get_notification_group_stmt_.explain().ok();
// LOG(FATAL) << "EXPLAINED";
return Status::OK();
}
Status add_dialog(DialogId dialog_id, int64 order, BufferSlice data,
vector<NotificationGroupKey> notification_groups) override {
SCOPE_EXIT {
add_dialog_stmt_.reset();
};
add_dialog_stmt_.bind_int64(1, dialog_id.get()).ensure();
add_dialog_stmt_.bind_int64(2, order).ensure();
add_dialog_stmt_.bind_blob(3, data.as_slice()).ensure();
TRY_STATUS(add_dialog_stmt_.step());
for (auto &to_add : notification_groups) {
SCOPE_EXIT {
add_notification_group_stmt_.reset();
};
add_notification_group_stmt_.bind_int32(1, to_add.group_id.get()).ensure();
add_notification_group_stmt_.bind_int64(2, to_add.dialog_id.get()).ensure();
if (to_add.last_notification_date != 0) {
add_notification_group_stmt_.bind_int32(3, to_add.last_notification_date).ensure();
} else {
add_notification_group_stmt_.bind_null(3).ensure();
}
TRY_STATUS(add_notification_group_stmt_.step());
}
return Status::OK();
}
Result<BufferSlice> get_dialog(DialogId dialog_id) override {
SCOPE_EXIT {
get_dialog_stmt_.reset();
};
get_dialog_stmt_.bind_int64(1, dialog_id.get()).ensure();
TRY_STATUS(get_dialog_stmt_.step());
if (!get_dialog_stmt_.has_row()) {
return Status::Error("Not found");
}
return BufferSlice(get_dialog_stmt_.view_blob(0));
}
Result<NotificationGroupKey> get_notification_group(NotificationGroupId notification_group_id) override {
SCOPE_EXIT {
get_notification_group_stmt_.reset();
};
get_notification_group_stmt_.bind_int32(1, notification_group_id.get()).ensure();
TRY_STATUS(get_notification_group_stmt_.step());
if (!get_notification_group_stmt_.has_row()) {
return Status::Error("Not found");
}
return NotificationGroupKey(notification_group_id, DialogId(get_notification_group_stmt_.view_int64(0)),
get_notification_group_stmt_.view_int32(1));
}
Result<vector<BufferSlice>> get_dialogs(int64 order, DialogId dialog_id, int32 limit) override {
SCOPE_EXIT {
get_dialogs_stmt_.reset();
};
get_dialogs_stmt_.bind_int64(1, order).ensure();
get_dialogs_stmt_.bind_int64(2, dialog_id.get()).ensure();
get_dialogs_stmt_.bind_int32(3, limit).ensure();
vector<BufferSlice> dialogs;
TRY_STATUS(get_dialogs_stmt_.step());
while (get_dialogs_stmt_.has_row()) {
BufferSlice data(get_dialogs_stmt_.view_blob(0));
auto loaded_dialog_id = get_dialogs_stmt_.view_int64(1);
auto loaded_dialog_order = get_dialogs_stmt_.view_int64(2);
LOG(INFO) << "Load chat " << loaded_dialog_id << " with order " << loaded_dialog_order;
dialogs.emplace_back(std::move(data));
TRY_STATUS(get_dialogs_stmt_.step());
}
return std::move(dialogs);
}
Result<vector<NotificationGroupKey>> get_notification_groups_by_last_notification_date(
NotificationGroupKey notification_group_key, int32 limit) override {
auto &stmt = get_notification_groups_by_last_notification_date_stmt_;
SCOPE_EXIT {
stmt.reset();
};
stmt.bind_int32(1, notification_group_key.last_notification_date).ensure();
stmt.bind_int64(2, notification_group_key.dialog_id.get()).ensure();
stmt.bind_int32(3, notification_group_key.group_id.get()).ensure();
stmt.bind_int32(4, limit).ensure();
vector<NotificationGroupKey> notification_groups;
TRY_STATUS(stmt.step());
while (stmt.has_row()) {
notification_groups.emplace_back(NotificationGroupId(stmt.view_int32(0)), DialogId(stmt.view_int64(1)),
stmt.view_int32(2));
TRY_STATUS(stmt.step());
}
return std::move(notification_groups);
}
Status begin_transaction() override {
return db_.begin_transaction();
}
Status commit_transaction() override {
return db_.commit_transaction();
}
private:
SqliteDb db_;
SqliteStatement add_dialog_stmt_;
SqliteStatement add_notification_group_stmt_;
SqliteStatement get_dialog_stmt_;
SqliteStatement get_dialogs_stmt_;
SqliteStatement get_notification_groups_by_last_notification_date_stmt_;
SqliteStatement get_notification_group_stmt_;
};
std::shared_ptr<DialogDbSyncSafeInterface> create_dialog_db_sync(
std::shared_ptr<SqliteConnectionSafe> sqlite_connection) {
class DialogDbSyncSafe : public DialogDbSyncSafeInterface {
public:
explicit DialogDbSyncSafe(std::shared_ptr<SqliteConnectionSafe> sqlite_connection)
: lsls_db_([safe_connection = std::move(sqlite_connection)] {
return make_unique<DialogDbImpl>(safe_connection->get().clone());
}) {
}
DialogDbSyncInterface &get() override {
return *lsls_db_.get();
}
private:
LazySchedulerLocalStorage<unique_ptr<DialogDbSyncInterface>> lsls_db_;
};
return std::make_shared<DialogDbSyncSafe>(std::move(sqlite_connection));
}
class DialogDbAsync : public DialogDbAsyncInterface {
public:
DialogDbAsync(std::shared_ptr<DialogDbSyncSafeInterface> sync_db, int32 scheduler_id) {
impl_ = create_actor_on_scheduler<Impl>("DialogDbActor", scheduler_id, std::move(sync_db));
}
void add_dialog(DialogId dialog_id, int64 order, BufferSlice data, vector<NotificationGroupKey> notification_groups,
Promise<> promise) override {
send_closure(impl_, &Impl::add_dialog, dialog_id, order, std::move(data), std::move(notification_groups),
std::move(promise));
}
void get_notification_groups_by_last_notification_date(NotificationGroupKey notification_group_key, int32 limit,
Promise<vector<NotificationGroupKey>> promise) override {
send_closure(impl_, &Impl::get_notification_groups_by_last_notification_date, notification_group_key, limit,
std::move(promise));
}
void get_notification_group(NotificationGroupId notification_group_id,
Promise<NotificationGroupKey> promise) override {
send_closure(impl_, &Impl::get_notification_group, notification_group_id, std::move(promise));
}
void get_dialog(DialogId dialog_id, Promise<BufferSlice> promise) override {
send_closure_later(impl_, &Impl::get_dialog, dialog_id, std::move(promise));
}
void get_dialogs(int64 order, DialogId dialog_id, int32 limit, Promise<vector<BufferSlice>> promise) override {
send_closure_later(impl_, &Impl::get_dialogs, order, dialog_id, limit, std::move(promise));
}
void close(Promise<> promise) override {
send_closure_later(impl_, &Impl::close, std::move(promise));
}
private:
class Impl : public Actor {
public:
explicit Impl(std::shared_ptr<DialogDbSyncSafeInterface> sync_db_safe) : sync_db_safe_(std::move(sync_db_safe)) {
}
void add_dialog(DialogId dialog_id, int64 order, BufferSlice data, vector<NotificationGroupKey> notification_groups,
Promise<> promise) {
add_write_query([=, promise = std::move(promise), data = std::move(data),
notification_groups = std::move(notification_groups)](Unit) mutable {
promise.set_result(sync_db_->add_dialog(dialog_id, order, std::move(data), std::move(notification_groups)));
});
}
void get_notification_groups_by_last_notification_date(NotificationGroupKey notification_group_key, int32 limit,
Promise<vector<NotificationGroupKey>> promise) {
add_read_query();
promise.set_result(sync_db_->get_notification_groups_by_last_notification_date(notification_group_key, limit));
}
void get_notification_group(NotificationGroupId notification_group_id, Promise<NotificationGroupKey> promise) {
add_read_query();
promise.set_result(sync_db_->get_notification_group(notification_group_id));
}
void get_dialog(DialogId dialog_id, Promise<BufferSlice> promise) {
add_read_query();
promise.set_result(sync_db_->get_dialog(dialog_id));
}
void get_dialogs(int64 order, DialogId dialog_id, int32 limit, Promise<vector<BufferSlice>> promise) {
add_read_query();
promise.set_result(sync_db_->get_dialogs(order, dialog_id, limit));
}
void close(Promise<> promise) {
do_flush();
sync_db_safe_.reset();
sync_db_ = nullptr;
promise.set_value(Unit());
stop();
}
private:
std::shared_ptr<DialogDbSyncSafeInterface> sync_db_safe_;
DialogDbSyncInterface *sync_db_ = nullptr;
static constexpr size_t MAX_PENDING_QUERIES_COUNT{50};
static constexpr double MAX_PENDING_QUERIES_DELAY{1};
vector<Promise<>> pending_writes_;
double wakeup_at_ = 0;
template <class F>
void add_write_query(F &&f) {
pending_writes_.push_back(PromiseCreator::lambda(std::forward<F>(f), PromiseCreator::Ignore()));
if (pending_writes_.size() > MAX_PENDING_QUERIES_COUNT) {
do_flush();
wakeup_at_ = 0;
} else if (wakeup_at_ == 0) {
wakeup_at_ = Time::now_cached() + MAX_PENDING_QUERIES_DELAY;
}
if (wakeup_at_ != 0) {
set_timeout_at(wakeup_at_);
}
}
void add_read_query() {
do_flush();
}
void do_flush() {
if (pending_writes_.empty()) {
return;
}
sync_db_->begin_transaction().ensure();
for (auto &query : pending_writes_) {
query.set_value(Unit());
}
sync_db_->commit_transaction().ensure();
pending_writes_.clear();
cancel_timeout();
}
void timeout_expired() override {
do_flush();
}
void start_up() override {
sync_db_ = &sync_db_safe_->get();
}
};
ActorOwn<Impl> impl_;
};
std::shared_ptr<DialogDbAsyncInterface> create_dialog_db_async(std::shared_ptr<DialogDbSyncSafeInterface> sync_db,
int32 scheduler_id) {
return std::make_shared<DialogDbAsync>(std::move(sync_db), scheduler_id);
}
} // namespace td