mirror of https://github.com/facebook/rocksdb.git
633 lines
21 KiB
C++
633 lines
21 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
|
|
// This source code is licensed under both the GPLv2 (found in the
|
|
// COPYING file in the root directory) and Apache 2.0 License
|
|
// (found in the LICENSE.Apache file in the root directory).
|
|
|
|
#ifndef ROCKSDB_LITE
|
|
|
|
#include "utilities/transactions/pessimistic_transaction_db.h"
|
|
|
|
#include <cinttypes>
|
|
#include <string>
|
|
#include <unordered_set>
|
|
#include <vector>
|
|
|
|
#include "db/db_impl/db_impl.h"
|
|
#include "rocksdb/db.h"
|
|
#include "rocksdb/options.h"
|
|
#include "rocksdb/utilities/transaction_db.h"
|
|
#include "test_util/sync_point.h"
|
|
#include "util/cast_util.h"
|
|
#include "util/mutexlock.h"
|
|
#include "utilities/transactions/pessimistic_transaction.h"
|
|
#include "utilities/transactions/transaction_db_mutex_impl.h"
|
|
#include "utilities/transactions/write_prepared_txn_db.h"
|
|
#include "utilities/transactions/write_unprepared_txn_db.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
PessimisticTransactionDB::PessimisticTransactionDB(
|
|
DB* db, const TransactionDBOptions& txn_db_options)
|
|
: TransactionDB(db),
|
|
db_impl_(static_cast_with_check<DBImpl, DB>(db)),
|
|
txn_db_options_(txn_db_options),
|
|
lock_mgr_(this, txn_db_options_.num_stripes, txn_db_options.max_num_locks,
|
|
txn_db_options_.max_num_deadlocks,
|
|
txn_db_options_.custom_mutex_factory
|
|
? txn_db_options_.custom_mutex_factory
|
|
: std::shared_ptr<TransactionDBMutexFactory>(
|
|
new TransactionDBMutexFactoryImpl())) {
|
|
assert(db_impl_ != nullptr);
|
|
info_log_ = db_impl_->GetDBOptions().info_log;
|
|
}
|
|
|
|
// Support initiliazing PessimisticTransactionDB from a stackable db
|
|
//
|
|
// PessimisticTransactionDB
|
|
// ^ ^
|
|
// | |
|
|
// | +
|
|
// | StackableDB
|
|
// | ^
|
|
// | |
|
|
// + +
|
|
// DBImpl
|
|
// ^
|
|
// |(inherit)
|
|
// +
|
|
// DB
|
|
//
|
|
PessimisticTransactionDB::PessimisticTransactionDB(
|
|
StackableDB* db, const TransactionDBOptions& txn_db_options)
|
|
: TransactionDB(db),
|
|
db_impl_(static_cast_with_check<DBImpl, DB>(db->GetRootDB())),
|
|
txn_db_options_(txn_db_options),
|
|
lock_mgr_(this, txn_db_options_.num_stripes, txn_db_options.max_num_locks,
|
|
txn_db_options_.max_num_deadlocks,
|
|
txn_db_options_.custom_mutex_factory
|
|
? txn_db_options_.custom_mutex_factory
|
|
: std::shared_ptr<TransactionDBMutexFactory>(
|
|
new TransactionDBMutexFactoryImpl())) {
|
|
assert(db_impl_ != nullptr);
|
|
}
|
|
|
|
PessimisticTransactionDB::~PessimisticTransactionDB() {
|
|
while (!transactions_.empty()) {
|
|
delete transactions_.begin()->second;
|
|
// TODO(myabandeh): this seems to be an unsafe approach as it is not quite
|
|
// clear whether delete would also remove the entry from transactions_.
|
|
}
|
|
}
|
|
|
|
Status PessimisticTransactionDB::VerifyCFOptions(const ColumnFamilyOptions&) {
|
|
return Status::OK();
|
|
}
|
|
|
|
Status PessimisticTransactionDB::Initialize(
|
|
const std::vector<size_t>& compaction_enabled_cf_indices,
|
|
const std::vector<ColumnFamilyHandle*>& handles) {
|
|
for (auto cf_ptr : handles) {
|
|
AddColumnFamily(cf_ptr);
|
|
}
|
|
// Verify cf options
|
|
for (auto handle : handles) {
|
|
ColumnFamilyDescriptor cfd;
|
|
Status s = handle->GetDescriptor(&cfd);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
s = VerifyCFOptions(cfd.options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
}
|
|
|
|
// Re-enable compaction for the column families that initially had
|
|
// compaction enabled.
|
|
std::vector<ColumnFamilyHandle*> compaction_enabled_cf_handles;
|
|
compaction_enabled_cf_handles.reserve(compaction_enabled_cf_indices.size());
|
|
for (auto index : compaction_enabled_cf_indices) {
|
|
compaction_enabled_cf_handles.push_back(handles[index]);
|
|
}
|
|
|
|
Status s = EnableAutoCompaction(compaction_enabled_cf_handles);
|
|
|
|
// create 'real' transactions from recovered shell transactions
|
|
auto dbimpl = static_cast_with_check<DBImpl, DB>(GetRootDB());
|
|
assert(dbimpl != nullptr);
|
|
auto rtrxs = dbimpl->recovered_transactions();
|
|
|
|
for (auto it = rtrxs.begin(); it != rtrxs.end(); ++it) {
|
|
auto recovered_trx = it->second;
|
|
assert(recovered_trx);
|
|
assert(recovered_trx->batches_.size() == 1);
|
|
const auto& seq = recovered_trx->batches_.begin()->first;
|
|
const auto& batch_info = recovered_trx->batches_.begin()->second;
|
|
assert(batch_info.log_number_);
|
|
assert(recovered_trx->name_.length());
|
|
|
|
WriteOptions w_options;
|
|
w_options.sync = true;
|
|
TransactionOptions t_options;
|
|
// This would help avoiding deadlock for keys that although exist in the WAL
|
|
// did not go through concurrency control. This includes the merge that
|
|
// MyRocks uses for auto-inc columns. It is safe to do so, since (i) if
|
|
// there is a conflict between the keys of two transactions that must be
|
|
// avoided, it is already avoided by the application, MyRocks, before the
|
|
// restart (ii) application, MyRocks, guarntees to rollback/commit the
|
|
// recovered transactions before new transactions start.
|
|
t_options.skip_concurrency_control = true;
|
|
|
|
Transaction* real_trx = BeginTransaction(w_options, t_options, nullptr);
|
|
assert(real_trx);
|
|
real_trx->SetLogNumber(batch_info.log_number_);
|
|
assert(seq != kMaxSequenceNumber);
|
|
if (GetTxnDBOptions().write_policy != WRITE_COMMITTED) {
|
|
real_trx->SetId(seq);
|
|
}
|
|
|
|
s = real_trx->SetName(recovered_trx->name_);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
|
|
s = real_trx->RebuildFromWriteBatch(batch_info.batch_);
|
|
// WriteCommitted set this to to disable this check that is specific to
|
|
// WritePrepared txns
|
|
assert(batch_info.batch_cnt_ == 0 ||
|
|
real_trx->GetWriteBatch()->SubBatchCnt() == batch_info.batch_cnt_);
|
|
real_trx->SetState(Transaction::PREPARED);
|
|
if (!s.ok()) {
|
|
break;
|
|
}
|
|
}
|
|
if (s.ok()) {
|
|
dbimpl->DeleteAllRecoveredTransactions();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Transaction* WriteCommittedTxnDB::BeginTransaction(
|
|
const WriteOptions& write_options, const TransactionOptions& txn_options,
|
|
Transaction* old_txn) {
|
|
if (old_txn != nullptr) {
|
|
ReinitializeTransaction(old_txn, write_options, txn_options);
|
|
return old_txn;
|
|
} else {
|
|
return new WriteCommittedTxn(this, write_options, txn_options);
|
|
}
|
|
}
|
|
|
|
TransactionDBOptions PessimisticTransactionDB::ValidateTxnDBOptions(
|
|
const TransactionDBOptions& txn_db_options) {
|
|
TransactionDBOptions validated = txn_db_options;
|
|
|
|
if (txn_db_options.num_stripes == 0) {
|
|
validated.num_stripes = 1;
|
|
}
|
|
|
|
return validated;
|
|
}
|
|
|
|
Status TransactionDB::Open(const Options& options,
|
|
const TransactionDBOptions& txn_db_options,
|
|
const std::string& dbname, TransactionDB** dbptr) {
|
|
DBOptions db_options(options);
|
|
ColumnFamilyOptions cf_options(options);
|
|
std::vector<ColumnFamilyDescriptor> column_families;
|
|
column_families.push_back(
|
|
ColumnFamilyDescriptor(kDefaultColumnFamilyName, cf_options));
|
|
std::vector<ColumnFamilyHandle*> handles;
|
|
Status s = TransactionDB::Open(db_options, txn_db_options, dbname,
|
|
column_families, &handles, dbptr);
|
|
if (s.ok()) {
|
|
assert(handles.size() == 1);
|
|
// i can delete the handle since DBImpl is always holding a reference to
|
|
// default column family
|
|
delete handles[0];
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status TransactionDB::Open(
|
|
const DBOptions& db_options, const TransactionDBOptions& txn_db_options,
|
|
const std::string& dbname,
|
|
const std::vector<ColumnFamilyDescriptor>& column_families,
|
|
std::vector<ColumnFamilyHandle*>* handles, TransactionDB** dbptr) {
|
|
Status s;
|
|
DB* db = nullptr;
|
|
if (txn_db_options.write_policy == WRITE_COMMITTED &&
|
|
db_options.unordered_write) {
|
|
return Status::NotSupported(
|
|
"WRITE_COMMITTED is incompatible with unordered_writes");
|
|
}
|
|
if (txn_db_options.write_policy == WRITE_UNPREPARED &&
|
|
db_options.unordered_write) {
|
|
// TODO(lth): support it
|
|
return Status::NotSupported(
|
|
"WRITE_UNPREPARED is currently incompatible with unordered_writes");
|
|
}
|
|
if (txn_db_options.write_policy == WRITE_PREPARED &&
|
|
db_options.unordered_write && !db_options.two_write_queues) {
|
|
return Status::NotSupported(
|
|
"WRITE_PREPARED is incompatible with unordered_writes if "
|
|
"two_write_queues is not enabled.");
|
|
}
|
|
|
|
std::vector<ColumnFamilyDescriptor> column_families_copy = column_families;
|
|
std::vector<size_t> compaction_enabled_cf_indices;
|
|
DBOptions db_options_2pc = db_options;
|
|
PrepareWrap(&db_options_2pc, &column_families_copy,
|
|
&compaction_enabled_cf_indices);
|
|
const bool use_seq_per_batch =
|
|
txn_db_options.write_policy == WRITE_PREPARED ||
|
|
txn_db_options.write_policy == WRITE_UNPREPARED;
|
|
const bool use_batch_per_txn =
|
|
txn_db_options.write_policy == WRITE_COMMITTED ||
|
|
txn_db_options.write_policy == WRITE_PREPARED;
|
|
s = DBImpl::Open(db_options_2pc, dbname, column_families_copy, handles, &db,
|
|
use_seq_per_batch, use_batch_per_txn);
|
|
if (s.ok()) {
|
|
ROCKS_LOG_WARN(db->GetDBOptions().info_log,
|
|
"Transaction write_policy is %" PRId32,
|
|
static_cast<int>(txn_db_options.write_policy));
|
|
s = WrapDB(db, txn_db_options, compaction_enabled_cf_indices, *handles,
|
|
dbptr);
|
|
}
|
|
if (!s.ok()) {
|
|
// just in case it was not deleted (and not set to nullptr).
|
|
delete db;
|
|
}
|
|
return s;
|
|
}
|
|
|
|
void TransactionDB::PrepareWrap(
|
|
DBOptions* db_options, std::vector<ColumnFamilyDescriptor>* column_families,
|
|
std::vector<size_t>* compaction_enabled_cf_indices) {
|
|
compaction_enabled_cf_indices->clear();
|
|
|
|
// Enable MemTable History if not already enabled
|
|
for (size_t i = 0; i < column_families->size(); i++) {
|
|
ColumnFamilyOptions* cf_options = &(*column_families)[i].options;
|
|
|
|
if (cf_options->max_write_buffer_size_to_maintain == 0 &&
|
|
cf_options->max_write_buffer_number_to_maintain == 0) {
|
|
// Setting to -1 will set the History size to
|
|
// max_write_buffer_number * write_buffer_size.
|
|
cf_options->max_write_buffer_size_to_maintain = -1;
|
|
}
|
|
if (!cf_options->disable_auto_compactions) {
|
|
// Disable compactions momentarily to prevent race with DB::Open
|
|
cf_options->disable_auto_compactions = true;
|
|
compaction_enabled_cf_indices->push_back(i);
|
|
}
|
|
}
|
|
db_options->allow_2pc = true;
|
|
}
|
|
|
|
Status TransactionDB::WrapDB(
|
|
// make sure this db is already opened with memtable history enabled,
|
|
// auto compaction distabled and 2 phase commit enabled
|
|
DB* db, const TransactionDBOptions& txn_db_options,
|
|
const std::vector<size_t>& compaction_enabled_cf_indices,
|
|
const std::vector<ColumnFamilyHandle*>& handles, TransactionDB** dbptr) {
|
|
assert(db != nullptr);
|
|
assert(dbptr != nullptr);
|
|
*dbptr = nullptr;
|
|
std::unique_ptr<PessimisticTransactionDB> txn_db;
|
|
switch (txn_db_options.write_policy) {
|
|
case WRITE_UNPREPARED:
|
|
txn_db.reset(new WriteUnpreparedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
break;
|
|
case WRITE_PREPARED:
|
|
txn_db.reset(new WritePreparedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
break;
|
|
case WRITE_COMMITTED:
|
|
default:
|
|
txn_db.reset(new WriteCommittedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
}
|
|
txn_db->UpdateCFComparatorMap(handles);
|
|
Status s = txn_db->Initialize(compaction_enabled_cf_indices, handles);
|
|
// In case of a failure at this point, db is deleted via the txn_db destructor
|
|
// and set to nullptr.
|
|
if (s.ok()) {
|
|
*dbptr = txn_db.release();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
Status TransactionDB::WrapStackableDB(
|
|
// make sure this stackable_db is already opened with memtable history
|
|
// enabled, auto compaction distabled and 2 phase commit enabled
|
|
StackableDB* db, const TransactionDBOptions& txn_db_options,
|
|
const std::vector<size_t>& compaction_enabled_cf_indices,
|
|
const std::vector<ColumnFamilyHandle*>& handles, TransactionDB** dbptr) {
|
|
assert(db != nullptr);
|
|
assert(dbptr != nullptr);
|
|
*dbptr = nullptr;
|
|
std::unique_ptr<PessimisticTransactionDB> txn_db;
|
|
|
|
switch (txn_db_options.write_policy) {
|
|
case WRITE_UNPREPARED:
|
|
txn_db.reset(new WriteUnpreparedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
break;
|
|
case WRITE_PREPARED:
|
|
txn_db.reset(new WritePreparedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
break;
|
|
case WRITE_COMMITTED:
|
|
default:
|
|
txn_db.reset(new WriteCommittedTxnDB(
|
|
db, PessimisticTransactionDB::ValidateTxnDBOptions(txn_db_options)));
|
|
}
|
|
txn_db->UpdateCFComparatorMap(handles);
|
|
Status s = txn_db->Initialize(compaction_enabled_cf_indices, handles);
|
|
// In case of a failure at this point, db is deleted via the txn_db destructor
|
|
// and set to nullptr.
|
|
if (s.ok()) {
|
|
*dbptr = txn_db.release();
|
|
}
|
|
return s;
|
|
}
|
|
|
|
// Let TransactionLockMgr know that this column family exists so it can
|
|
// allocate a LockMap for it.
|
|
void PessimisticTransactionDB::AddColumnFamily(
|
|
const ColumnFamilyHandle* handle) {
|
|
lock_mgr_.AddColumnFamily(handle->GetID());
|
|
}
|
|
|
|
Status PessimisticTransactionDB::CreateColumnFamily(
|
|
const ColumnFamilyOptions& options, const std::string& column_family_name,
|
|
ColumnFamilyHandle** handle) {
|
|
InstrumentedMutexLock l(&column_family_mutex_);
|
|
Status s = VerifyCFOptions(options);
|
|
if (!s.ok()) {
|
|
return s;
|
|
}
|
|
|
|
s = db_->CreateColumnFamily(options, column_family_name, handle);
|
|
if (s.ok()) {
|
|
lock_mgr_.AddColumnFamily((*handle)->GetID());
|
|
UpdateCFComparatorMap(*handle);
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
// Let TransactionLockMgr know that it can deallocate the LockMap for this
|
|
// column family.
|
|
Status PessimisticTransactionDB::DropColumnFamily(
|
|
ColumnFamilyHandle* column_family) {
|
|
InstrumentedMutexLock l(&column_family_mutex_);
|
|
|
|
Status s = db_->DropColumnFamily(column_family);
|
|
if (s.ok()) {
|
|
lock_mgr_.RemoveColumnFamily(column_family->GetID());
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status PessimisticTransactionDB::TryLock(PessimisticTransaction* txn,
|
|
uint32_t cfh_id,
|
|
const std::string& key,
|
|
bool exclusive) {
|
|
return lock_mgr_.TryLock(txn, cfh_id, key, GetEnv(), exclusive);
|
|
}
|
|
|
|
void PessimisticTransactionDB::UnLock(PessimisticTransaction* txn,
|
|
const TransactionKeyMap* keys) {
|
|
lock_mgr_.UnLock(txn, keys, GetEnv());
|
|
}
|
|
|
|
void PessimisticTransactionDB::UnLock(PessimisticTransaction* txn,
|
|
uint32_t cfh_id, const std::string& key) {
|
|
lock_mgr_.UnLock(txn, cfh_id, key, GetEnv());
|
|
}
|
|
|
|
// Used when wrapping DB write operations in a transaction
|
|
Transaction* PessimisticTransactionDB::BeginInternalTransaction(
|
|
const WriteOptions& options) {
|
|
TransactionOptions txn_options;
|
|
Transaction* txn = BeginTransaction(options, txn_options, nullptr);
|
|
|
|
// Use default timeout for non-transactional writes
|
|
txn->SetLockTimeout(txn_db_options_.default_lock_timeout);
|
|
return txn;
|
|
}
|
|
|
|
// All user Put, Merge, Delete, and Write requests must be intercepted to make
|
|
// sure that they lock all keys that they are writing to avoid causing conflicts
|
|
// with any concurrent transactions. The easiest way to do this is to wrap all
|
|
// write operations in a transaction.
|
|
//
|
|
// Put(), Merge(), and Delete() only lock a single key per call. Write() will
|
|
// sort its keys before locking them. This guarantees that TransactionDB write
|
|
// methods cannot deadlock with each other (but still could deadlock with a
|
|
// Transaction).
|
|
Status PessimisticTransactionDB::Put(const WriteOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& val) {
|
|
Status s;
|
|
|
|
Transaction* txn = BeginInternalTransaction(options);
|
|
txn->DisableIndexing();
|
|
|
|
// Since the client didn't create a transaction, they don't care about
|
|
// conflict checking for this write. So we just need to do PutUntracked().
|
|
s = txn->PutUntracked(column_family, key, val);
|
|
|
|
if (s.ok()) {
|
|
s = txn->Commit();
|
|
}
|
|
|
|
delete txn;
|
|
|
|
return s;
|
|
}
|
|
|
|
Status PessimisticTransactionDB::Delete(const WriteOptions& wopts,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice& key) {
|
|
Status s;
|
|
|
|
Transaction* txn = BeginInternalTransaction(wopts);
|
|
txn->DisableIndexing();
|
|
|
|
// Since the client didn't create a transaction, they don't care about
|
|
// conflict checking for this write. So we just need to do
|
|
// DeleteUntracked().
|
|
s = txn->DeleteUntracked(column_family, key);
|
|
|
|
if (s.ok()) {
|
|
s = txn->Commit();
|
|
}
|
|
|
|
delete txn;
|
|
|
|
return s;
|
|
}
|
|
|
|
Status PessimisticTransactionDB::SingleDelete(const WriteOptions& wopts,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice& key) {
|
|
Status s;
|
|
|
|
Transaction* txn = BeginInternalTransaction(wopts);
|
|
txn->DisableIndexing();
|
|
|
|
// Since the client didn't create a transaction, they don't care about
|
|
// conflict checking for this write. So we just need to do
|
|
// SingleDeleteUntracked().
|
|
s = txn->SingleDeleteUntracked(column_family, key);
|
|
|
|
if (s.ok()) {
|
|
s = txn->Commit();
|
|
}
|
|
|
|
delete txn;
|
|
|
|
return s;
|
|
}
|
|
|
|
Status PessimisticTransactionDB::Merge(const WriteOptions& options,
|
|
ColumnFamilyHandle* column_family,
|
|
const Slice& key, const Slice& value) {
|
|
Status s;
|
|
|
|
Transaction* txn = BeginInternalTransaction(options);
|
|
txn->DisableIndexing();
|
|
|
|
// Since the client didn't create a transaction, they don't care about
|
|
// conflict checking for this write. So we just need to do
|
|
// MergeUntracked().
|
|
s = txn->MergeUntracked(column_family, key, value);
|
|
|
|
if (s.ok()) {
|
|
s = txn->Commit();
|
|
}
|
|
|
|
delete txn;
|
|
|
|
return s;
|
|
}
|
|
|
|
Status PessimisticTransactionDB::Write(const WriteOptions& opts,
|
|
WriteBatch* updates) {
|
|
return WriteWithConcurrencyControl(opts, updates);
|
|
}
|
|
|
|
Status WriteCommittedTxnDB::Write(const WriteOptions& opts,
|
|
WriteBatch* updates) {
|
|
if (txn_db_options_.skip_concurrency_control) {
|
|
return db_impl_->Write(opts, updates);
|
|
} else {
|
|
return WriteWithConcurrencyControl(opts, updates);
|
|
}
|
|
}
|
|
|
|
Status WriteCommittedTxnDB::Write(
|
|
const WriteOptions& opts,
|
|
const TransactionDBWriteOptimizations& optimizations, WriteBatch* updates) {
|
|
if (optimizations.skip_concurrency_control) {
|
|
return db_impl_->Write(opts, updates);
|
|
} else {
|
|
return WriteWithConcurrencyControl(opts, updates);
|
|
}
|
|
}
|
|
|
|
void PessimisticTransactionDB::InsertExpirableTransaction(
|
|
TransactionID tx_id, PessimisticTransaction* tx) {
|
|
assert(tx->GetExpirationTime() > 0);
|
|
std::lock_guard<std::mutex> lock(map_mutex_);
|
|
expirable_transactions_map_.insert({tx_id, tx});
|
|
}
|
|
|
|
void PessimisticTransactionDB::RemoveExpirableTransaction(TransactionID tx_id) {
|
|
std::lock_guard<std::mutex> lock(map_mutex_);
|
|
expirable_transactions_map_.erase(tx_id);
|
|
}
|
|
|
|
bool PessimisticTransactionDB::TryStealingExpiredTransactionLocks(
|
|
TransactionID tx_id) {
|
|
std::lock_guard<std::mutex> lock(map_mutex_);
|
|
|
|
auto tx_it = expirable_transactions_map_.find(tx_id);
|
|
if (tx_it == expirable_transactions_map_.end()) {
|
|
return true;
|
|
}
|
|
PessimisticTransaction& tx = *(tx_it->second);
|
|
return tx.TryStealingLocks();
|
|
}
|
|
|
|
void PessimisticTransactionDB::ReinitializeTransaction(
|
|
Transaction* txn, const WriteOptions& write_options,
|
|
const TransactionOptions& txn_options) {
|
|
auto txn_impl =
|
|
static_cast_with_check<PessimisticTransaction, Transaction>(txn);
|
|
|
|
txn_impl->Reinitialize(this, write_options, txn_options);
|
|
}
|
|
|
|
Transaction* PessimisticTransactionDB::GetTransactionByName(
|
|
const TransactionName& name) {
|
|
std::lock_guard<std::mutex> lock(name_map_mutex_);
|
|
auto it = transactions_.find(name);
|
|
if (it == transactions_.end()) {
|
|
return nullptr;
|
|
} else {
|
|
return it->second;
|
|
}
|
|
}
|
|
|
|
void PessimisticTransactionDB::GetAllPreparedTransactions(
|
|
std::vector<Transaction*>* transv) {
|
|
assert(transv);
|
|
transv->clear();
|
|
std::lock_guard<std::mutex> lock(name_map_mutex_);
|
|
for (auto it = transactions_.begin(); it != transactions_.end(); ++it) {
|
|
if (it->second->GetState() == Transaction::PREPARED) {
|
|
transv->push_back(it->second);
|
|
}
|
|
}
|
|
}
|
|
|
|
TransactionLockMgr::LockStatusData
|
|
PessimisticTransactionDB::GetLockStatusData() {
|
|
return lock_mgr_.GetLockStatusData();
|
|
}
|
|
|
|
std::vector<DeadlockPath> PessimisticTransactionDB::GetDeadlockInfoBuffer() {
|
|
return lock_mgr_.GetDeadlockInfoBuffer();
|
|
}
|
|
|
|
void PessimisticTransactionDB::SetDeadlockInfoBufferSize(uint32_t target_size) {
|
|
lock_mgr_.Resize(target_size);
|
|
}
|
|
|
|
void PessimisticTransactionDB::RegisterTransaction(Transaction* txn) {
|
|
assert(txn);
|
|
assert(txn->GetName().length() > 0);
|
|
assert(GetTransactionByName(txn->GetName()) == nullptr);
|
|
assert(txn->GetState() == Transaction::STARTED);
|
|
std::lock_guard<std::mutex> lock(name_map_mutex_);
|
|
transactions_[txn->GetName()] = txn;
|
|
}
|
|
|
|
void PessimisticTransactionDB::UnregisterTransaction(Transaction* txn) {
|
|
assert(txn);
|
|
std::lock_guard<std::mutex> lock(name_map_mutex_);
|
|
auto it = transactions_.find(txn->GetName());
|
|
assert(it != transactions_.end());
|
|
transactions_.erase(it);
|
|
}
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
#endif // ROCKSDB_LITE
|