21696ba502
Summary: Replace dynamic_cast<> so that users can choose to build with RTTI off, so that they can save several bytes per object, and get tiny more memory available. Some nontrivial changes: 1. Add Comparator::GetRootComparator() to get around the internal comparator hack 2. Add the two experiemental functions to DB 3. Add TableFactory::GetOptionString() to avoid unnecessary casting to get the option string 4. Since 3 is done, move the parsing option functions for table factory to table factory files too, to be symmetric. Closes https://github.com/facebook/rocksdb/pull/2645 Differential Revision: D5502723 Pulled By: siying fbshipit-source-id: fd13cec5601cf68a554d87bfcf056f2ffa5fbf7c
137 lines
4.1 KiB
C++
137 lines
4.1 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/optimistic_transaction_impl.h"
|
|
|
|
#include <algorithm>
|
|
#include <string>
|
|
#include <vector>
|
|
|
|
#include "db/column_family.h"
|
|
#include "db/db_impl.h"
|
|
#include "rocksdb/comparator.h"
|
|
#include "rocksdb/db.h"
|
|
#include "rocksdb/status.h"
|
|
#include "rocksdb/utilities/optimistic_transaction_db.h"
|
|
#include "util/cast_util.h"
|
|
#include "util/string_util.h"
|
|
#include "utilities/transactions/transaction_util.h"
|
|
|
|
namespace rocksdb {
|
|
|
|
struct WriteOptions;
|
|
|
|
OptimisticTransactionImpl::OptimisticTransactionImpl(
|
|
OptimisticTransactionDB* txn_db, const WriteOptions& write_options,
|
|
const OptimisticTransactionOptions& txn_options)
|
|
: TransactionBaseImpl(txn_db->GetBaseDB(), write_options), txn_db_(txn_db) {
|
|
Initialize(txn_options);
|
|
}
|
|
|
|
void OptimisticTransactionImpl::Initialize(
|
|
const OptimisticTransactionOptions& txn_options) {
|
|
if (txn_options.set_snapshot) {
|
|
SetSnapshot();
|
|
}
|
|
}
|
|
|
|
void OptimisticTransactionImpl::Reinitialize(
|
|
OptimisticTransactionDB* txn_db, const WriteOptions& write_options,
|
|
const OptimisticTransactionOptions& txn_options) {
|
|
TransactionBaseImpl::Reinitialize(txn_db->GetBaseDB(), write_options);
|
|
Initialize(txn_options);
|
|
}
|
|
|
|
OptimisticTransactionImpl::~OptimisticTransactionImpl() {
|
|
}
|
|
|
|
void OptimisticTransactionImpl::Clear() {
|
|
TransactionBaseImpl::Clear();
|
|
}
|
|
|
|
Status OptimisticTransactionImpl::Prepare() {
|
|
return Status::InvalidArgument(
|
|
"Two phase commit not supported for optimistic transactions.");
|
|
}
|
|
|
|
Status OptimisticTransactionImpl::Commit() {
|
|
// Set up callback which will call CheckTransactionForConflicts() to
|
|
// check whether this transaction is safe to be committed.
|
|
OptimisticTransactionCallback callback(this);
|
|
|
|
DBImpl* db_impl = static_cast_with_check<DBImpl, DB>(db_->GetRootDB());
|
|
|
|
Status s = db_impl->WriteWithCallback(
|
|
write_options_, GetWriteBatch()->GetWriteBatch(), &callback);
|
|
|
|
if (s.ok()) {
|
|
Clear();
|
|
}
|
|
|
|
return s;
|
|
}
|
|
|
|
Status OptimisticTransactionImpl::Rollback() {
|
|
Clear();
|
|
return Status::OK();
|
|
}
|
|
|
|
// Record this key so that we can check it for conflicts at commit time.
|
|
//
|
|
// 'exclusive' is unused for OptimisticTransaction.
|
|
Status OptimisticTransactionImpl::TryLock(ColumnFamilyHandle* column_family,
|
|
const Slice& key, bool read_only,
|
|
bool exclusive, bool untracked) {
|
|
if (untracked) {
|
|
return Status::OK();
|
|
}
|
|
uint32_t cfh_id = GetColumnFamilyID(column_family);
|
|
|
|
SetSnapshotIfNeeded();
|
|
|
|
SequenceNumber seq;
|
|
if (snapshot_) {
|
|
seq = snapshot_->GetSequenceNumber();
|
|
} else {
|
|
seq = db_->GetLatestSequenceNumber();
|
|
}
|
|
|
|
std::string key_str = key.ToString();
|
|
|
|
TrackKey(cfh_id, key_str, seq, read_only, exclusive);
|
|
|
|
// Always return OK. Confilct checking will happen at commit time.
|
|
return Status::OK();
|
|
}
|
|
|
|
// Returns OK if it is safe to commit this transaction. Returns Status::Busy
|
|
// if there are read or write conflicts that would prevent us from committing OR
|
|
// if we can not determine whether there would be any such conflicts.
|
|
//
|
|
// Should only be called on writer thread in order to avoid any race conditions
|
|
// in detecting write conflicts.
|
|
Status OptimisticTransactionImpl::CheckTransactionForConflicts(DB* db) {
|
|
Status result;
|
|
|
|
auto db_impl = static_cast_with_check<DBImpl, DB>(db);
|
|
|
|
// Since we are on the write thread and do not want to block other writers,
|
|
// we will do a cache-only conflict check. This can result in TryAgain
|
|
// getting returned if there is not sufficient memtable history to check
|
|
// for conflicts.
|
|
return TransactionUtil::CheckKeysForConflicts(db_impl, GetTrackedKeys(),
|
|
true /* cache_only */);
|
|
}
|
|
|
|
Status OptimisticTransactionImpl::SetName(const TransactionName& name) {
|
|
return Status::InvalidArgument("Optimistic transactions cannot be named.");
|
|
}
|
|
|
|
} // namespace rocksdb
|
|
|
|
#endif // ROCKSDB_LITE
|