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rocksdb/utilities/transactions/write_prepared_txn.h

82 lines
2.4 KiB

// 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).
#pragma once
#ifndef ROCKSDB_LITE
#include <algorithm>
#include <atomic>
#include <mutex>
#include <stack>
#include <string>
#include <unordered_map>
#include <vector>
#include "db/write_callback.h"
#include "rocksdb/db.h"
#include "rocksdb/slice.h"
#include "rocksdb/snapshot.h"
#include "rocksdb/status.h"
#include "rocksdb/types.h"
#include "rocksdb/utilities/transaction.h"
#include "rocksdb/utilities/transaction_db.h"
#include "rocksdb/utilities/write_batch_with_index.h"
#include "util/autovector.h"
#include "utilities/transactions/pessimistic_transaction.h"
#include "utilities/transactions/pessimistic_transaction_db.h"
#include "utilities/transactions/transaction_base.h"
#include "utilities/transactions/transaction_util.h"
namespace rocksdb {
class WritePreparedTxnDB;
// This impl could write to DB also uncomitted data and then later tell apart
// committed data from uncomitted data. Uncommitted data could be after the
// Prepare phase in 2PC (WritePreparedTxn) or before that
// (WriteUnpreparedTxnImpl).
class WritePreparedTxn : public PessimisticTransaction {
public:
WritePreparedTxn(WritePreparedTxnDB* db, const WriteOptions& write_options,
const TransactionOptions& txn_options);
virtual ~WritePreparedTxn() {}
using Transaction::Get;
virtual Status Get(const ReadOptions& options,
ColumnFamilyHandle* column_family, const Slice& key,
PinnableSlice* value) override;
Status Rollback() override;
private:
Status PrepareInternal() override;
Status CommitWithoutPrepareInternal() override;
Status CommitBatchInternal(WriteBatch* batch) override;
Status CommitInternal() override;
// TODO(myabandeh): verify that the current impl work with values being
// written with prepare sequence number too.
// Status ValidateSnapshot(ColumnFamilyHandle* column_family, const Slice&
// key,
// SequenceNumber prev_seqno, SequenceNumber*
// new_seqno);
// No copying allowed
WritePreparedTxn(const WritePreparedTxn&);
void operator=(const WritePreparedTxn&);
WritePreparedTxnDB* wpt_db_;
uint64_t prepare_seq_;
};
} // namespace rocksdb
#endif // ROCKSDB_LITE