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#include "datashard_locks_db.h"
namespace NKikimr::NDataShard {
bool TDataShardLocksDb::Load(TVector<TLockRow>& rows) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
rows.clear();
// Load locks
THashMap<ui64, size_t> lockIndex;
{
auto rowset = db.Table<Schema::Locks>().Select();
if (!rowset.IsReady()) {
return false;
}
while (!rowset.EndOfSet()) {
auto& lock = rows.emplace_back();
lock.LockId = rowset.GetValue<Schema::Locks::LockId>();
lock.LockNodeId = rowset.GetValue<Schema::Locks::LockNodeId>();
lock.Generation = rowset.GetValue<Schema::Locks::Generation>();
lock.Counter = rowset.GetValue<Schema::Locks::Counter>();
lock.CreateTs = rowset.GetValue<Schema::Locks::CreateTimestamp>();
lock.Flags = rowset.GetValue<Schema::Locks::Flags>();
lockIndex[lock.LockId] = rows.size() - 1;
if (!rowset.Next()) {
return false;
}
}
}
// Load ranges
{
auto rowset = db.Table<Schema::LockRanges>().Select();
if (!rowset.IsReady()) {
return false;
}
while (!rowset.EndOfSet()) {
auto lockId = rowset.GetValue<Schema::LockRanges::LockId>();
auto it = lockIndex.find(lockId);
if (it != lockIndex.end()) {
auto& lock = rows[it->second];
auto& range = lock.Ranges.emplace_back();
range.RangeId = rowset.GetValue<Schema::LockRanges::RangeId>();
range.TableId.OwnerId = rowset.GetValue<Schema::LockRanges::PathOwnerId>();
range.TableId.LocalPathId = rowset.GetValue<Schema::LockRanges::LocalPathId>();
range.Flags = rowset.GetValue<Schema::LockRanges::Flags>();
range.Data = rowset.GetValue<Schema::LockRanges::Data>();
}
if (!rowset.Next()) {
return false;
}
}
}
// Load conflicts
{
auto rowset = db.Table<Schema::LockConflicts>().Select();
if (!rowset.IsReady()) {
return false;
}
while (!rowset.EndOfSet()) {
auto lockId = rowset.GetValue<Schema::LockConflicts::LockId>();
auto it = lockIndex.find(lockId);
if (it != lockIndex.end()) {
auto& lock = rows[it->second];
lock.Conflicts.push_back(rowset.GetValue<Schema::LockConflicts::ConflictId>());
}
if (!rowset.Next()) {
return false;
}
}
}
// Load volatile dependencies
{
auto rowset = db.Table<Schema::LockVolatileDependencies>().Select();
if (!rowset.IsReady()) {
return false;
}
while (!rowset.EndOfSet()) {
auto lockId = rowset.GetValue<Schema::LockVolatileDependencies::LockId>();
auto it = lockIndex.find(lockId);
if (it != lockIndex.end()) {
auto& lock = rows[it->second];
auto txId = rowset.GetValue<Schema::LockVolatileDependencies::TxId>();
lock.VolatileDependencies.push_back(txId);
}
if (!rowset.Next()) {
return false;
}
}
}
return true;
}
bool TDataShardLocksDb::MayAddLock(ui64 lockId) {
for (auto& pr : Self.GetUserTables()) {
auto tid = pr.second->LocalTid;
// We cannot start a new lockId if it has any uncompacted data
if (DB.HasTxData(tid, lockId)) {
return false;
}
}
return true;
}
void TDataShardLocksDb::PersistAddLock(ui64 lockId, ui32 lockNodeId, ui32 generation, ui64 counter, ui64 createTs, ui64 flags) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::Locks>().Key(lockId).Update(
NIceDb::TUpdate<Schema::Locks::LockNodeId>(lockNodeId),
NIceDb::TUpdate<Schema::Locks::Generation>(generation),
NIceDb::TUpdate<Schema::Locks::Counter>(counter),
NIceDb::TUpdate<Schema::Locks::CreateTimestamp>(createTs),
NIceDb::TUpdate<Schema::Locks::Flags>(flags));
HasChanges_ = true;
}
void TDataShardLocksDb::PersistLockCounter(ui64 lockId, ui64 counter) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::Locks>().Key(lockId).Update(
NIceDb::TUpdate<Schema::Locks::Counter>(counter));
HasChanges_ = true;
}
void TDataShardLocksDb::PersistRemoveLock(ui64 lockId) {
// We remove lock changes unless it's managed by volatile tx manager
bool isVolatile = Self.GetVolatileTxManager().FindByCommitTxId(lockId);
if (!isVolatile) {
for (auto& pr : Self.GetUserTables()) {
auto tid = pr.second->LocalTid;
// Removing the lock also removes any uncommitted data
if (DB.HasOpenTx(tid, lockId)) {
DB.RemoveTx(tid, lockId);
}
}
}
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::Locks>().Key(lockId).Delete();
HasChanges_ = true;
if (!isVolatile) {
Self.ScheduleRemoveLockChanges(lockId);
}
}
void TDataShardLocksDb::PersistAddRange(ui64 lockId, ui64 rangeId, const TPathId& tableId, ui64 flags, const TString& data) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockRanges>().Key(lockId, rangeId).Update(
NIceDb::TUpdate<Schema::LockRanges::PathOwnerId>(tableId.OwnerId),
NIceDb::TUpdate<Schema::LockRanges::LocalPathId>(tableId.LocalPathId),
NIceDb::TUpdate<Schema::LockRanges::Flags>(flags),
NIceDb::TUpdate<Schema::LockRanges::Data>(data));
HasChanges_ = true;
}
void TDataShardLocksDb::PersistRangeFlags(ui64 lockId, ui64 rangeId, ui64 flags) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockRanges>().Key(lockId, rangeId).Update(
NIceDb::TUpdate<Schema::LockRanges::Flags>(flags));
HasChanges_ = true;
}
void TDataShardLocksDb::PersistRemoveRange(ui64 lockId, ui64 rangeId) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockRanges>().Key(lockId, rangeId).Delete();
HasChanges_ = true;
}
void TDataShardLocksDb::PersistAddConflict(ui64 lockId, ui64 otherLockId) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockConflicts>().Key(lockId, otherLockId).Update();
HasChanges_ = true;
}
void TDataShardLocksDb::PersistRemoveConflict(ui64 lockId, ui64 otherLockId) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockConflicts>().Key(lockId, otherLockId).Delete();
HasChanges_ = true;
}
void TDataShardLocksDb::PersistAddVolatileDependency(ui64 lockId, ui64 txId) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockVolatileDependencies>().Key(lockId, txId).Update();
HasChanges_ = true;
}
void TDataShardLocksDb::PersistRemoveVolatileDependency(ui64 lockId, ui64 txId) {
using Schema = TDataShard::Schema;
NIceDb::TNiceDb db(DB);
db.Table<Schema::LockVolatileDependencies>().Key(lockId, txId).Delete();
HasChanges_ = true;
}
} // namespace NKikimr::NDataShard
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