mirror of
https://github.com/facebook/rocksdb.git
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c3466eab07
Summary: Clean up transactions to use the new RollbackToSavePoint api in WriteBatchWithIndex. Note, this diff depends on Pessimistic Transactions diff and ManagedSnapshot diff (D40869 and D43293). Test Plan: unit tests Reviewers: rven, yhchiang, kradhakrishnan, spetrunia, sdong Reviewed By: sdong Subscribers: dhruba, leveldb Differential Revision: https://reviews.facebook.net/D43371
60 lines
1.9 KiB
C++
60 lines
1.9 KiB
C++
// Copyright (c) 2015, Facebook, Inc. All rights reserved.
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// This source code is licensed under the BSD-style license found in the
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// LICENSE file in the root directory of this source tree. An additional grant
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// of patent rights can be found in the PATENTS file in the same directory.
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#pragma once
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#ifndef ROCKSDB_LITE
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#include <string>
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#include <unordered_map>
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#include "rocksdb/db.h"
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#include "rocksdb/slice.h"
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#include "rocksdb/status.h"
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#include "rocksdb/types.h"
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namespace rocksdb {
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using TransactionKeyMap =
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std::unordered_map<uint32_t,
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std::unordered_map<std::string, SequenceNumber>>;
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class DBImpl;
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struct SuperVersion;
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class WriteBatchWithIndex;
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class TransactionUtil {
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public:
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// Verifies there have been no writes to this key in the db since this
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// sequence number.
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//
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// Returns OK on success, BUSY if there is a conflicting write, or other error
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// status for any unexpected errors.
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static Status CheckKeyForConflicts(DBImpl* db_impl,
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ColumnFamilyHandle* column_family,
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const std::string& key,
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SequenceNumber key_seq);
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// For each key,SequenceNumber pair in the TransactionKeyMap, this function
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// will verify there have been no writes to the key in the db since that
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// sequence number.
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//
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// Returns OK on success, BUSY if there is a conflicting write, or other error
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// status for any unexpected errors.
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//
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// REQUIRED: this function should only be called on the write thread or if the
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// mutex is held.
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static Status CheckKeysForConflicts(DBImpl* db_impl, TransactionKeyMap* keys);
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private:
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static Status CheckKey(DBImpl* db_impl, SuperVersion* sv,
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SequenceNumber earliest_seq, SequenceNumber key_seq,
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const std::string& key);
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};
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} // namespace rocksdb
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#endif // ROCKSDB_LITE
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