8c392a31d7
Summary: On iterator create, take a snapshot, create a ReadCallback and pass the ReadCallback to the underlying DBIter to check if key is committed. Closes https://github.com/facebook/rocksdb/pull/2981 Differential Revision: D6001471 Pulled By: yiwu-arbug fbshipit-source-id: 3565c4cdaf25370ba47008b0e0cb65b31dfe79fe
88 lines
2.7 KiB
C++
88 lines
2.7 KiB
C++
// Copyright (c) 2011-present, Facebook, Inc. All rights reserved.
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// This source code is licensed under both the GPLv2 (found in the
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// COPYING file in the root directory) and Apache 2.0 License
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// (found in the LICENSE.Apache file in the root directory).
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#pragma once
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#ifndef ROCKSDB_LITE
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#include <algorithm>
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#include <atomic>
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#include <mutex>
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#include <stack>
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#include <string>
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#include <unordered_map>
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#include <vector>
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#include "db/write_callback.h"
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#include "rocksdb/db.h"
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#include "rocksdb/slice.h"
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#include "rocksdb/snapshot.h"
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#include "rocksdb/status.h"
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#include "rocksdb/types.h"
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#include "rocksdb/utilities/transaction.h"
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#include "rocksdb/utilities/transaction_db.h"
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#include "rocksdb/utilities/write_batch_with_index.h"
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#include "util/autovector.h"
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#include "utilities/transactions/pessimistic_transaction.h"
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#include "utilities/transactions/pessimistic_transaction_db.h"
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#include "utilities/transactions/transaction_base.h"
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#include "utilities/transactions/transaction_util.h"
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namespace rocksdb {
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class WritePreparedTxnDB;
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// This impl could write to DB also uncomitted data and then later tell apart
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// committed data from uncomitted data. Uncommitted data could be after the
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// Prepare phase in 2PC (WritePreparedTxn) or before that
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// (WriteUnpreparedTxnImpl).
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class WritePreparedTxn : public PessimisticTransaction {
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public:
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WritePreparedTxn(WritePreparedTxnDB* db, const WriteOptions& write_options,
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const TransactionOptions& txn_options);
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virtual ~WritePreparedTxn() {}
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using Transaction::Get;
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virtual Status Get(const ReadOptions& options,
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ColumnFamilyHandle* column_family, const Slice& key,
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PinnableSlice* value) override;
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using Transaction::GetIterator;
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virtual Iterator* GetIterator(const ReadOptions& options) override;
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virtual Iterator* GetIterator(const ReadOptions& options,
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ColumnFamilyHandle* column_family) override;
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private:
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friend class WritePreparedTransactionTest_BasicRecoveryTest_Test;
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Status PrepareInternal() override;
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Status CommitWithoutPrepareInternal() override;
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Status CommitBatchInternal(WriteBatch* batch) override;
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Status CommitInternal() override;
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Status RollbackInternal() override;
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// TODO(myabandeh): verify that the current impl work with values being
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// written with prepare sequence number too.
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// Status ValidateSnapshot(ColumnFamilyHandle* column_family, const Slice&
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// key,
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// SequenceNumber prev_seqno, SequenceNumber*
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// new_seqno);
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// No copying allowed
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WritePreparedTxn(const WritePreparedTxn&);
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void operator=(const WritePreparedTxn&);
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WritePreparedTxnDB* wpt_db_;
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};
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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