mirror of
https://github.com/facebook/rocksdb.git
synced 2024-11-26 16:30:56 +00:00
4720ba4391
Summary: We haven't been actively mantaining RocksDB LITE recently and the size must have been gone up significantly. We are removing the support. Most of changes were done through following comments: unifdef -m -UROCKSDB_LITE `git grep -l ROCKSDB_LITE | egrep '[.](cc|h)'` by Peter Dillinger. Others changes were manually applied to build scripts, CircleCI manifests, ROCKSDB_LITE is used in an expression and file db_stress_test_base.cc. Pull Request resolved: https://github.com/facebook/rocksdb/pull/11147 Test Plan: See CI Reviewed By: pdillinger Differential Revision: D42796341 fbshipit-source-id: 4920e15fc2060c2cd2221330a6d0e5e65d4b7fe2
59 lines
1.8 KiB
C++
59 lines
1.8 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).
|
|
|
|
#pragma once
|
|
#include "rocksdb/types.h"
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
enum class SnapshotCheckerResult : int {
|
|
kInSnapshot = 0,
|
|
kNotInSnapshot = 1,
|
|
// In case snapshot is released and the checker has no clue whether
|
|
// the given sequence is visible to the snapshot.
|
|
kSnapshotReleased = 2,
|
|
};
|
|
|
|
// Callback class that control GC of duplicate keys in flush/compaction.
|
|
class SnapshotChecker {
|
|
public:
|
|
virtual ~SnapshotChecker() {}
|
|
virtual SnapshotCheckerResult CheckInSnapshot(
|
|
SequenceNumber sequence, SequenceNumber snapshot_sequence) const = 0;
|
|
};
|
|
|
|
class DisableGCSnapshotChecker : public SnapshotChecker {
|
|
public:
|
|
virtual ~DisableGCSnapshotChecker() {}
|
|
virtual SnapshotCheckerResult CheckInSnapshot(
|
|
SequenceNumber /*sequence*/,
|
|
SequenceNumber /*snapshot_sequence*/) const override {
|
|
// By returning kNotInSnapshot, we prevent all the values from being GCed
|
|
return SnapshotCheckerResult::kNotInSnapshot;
|
|
}
|
|
static DisableGCSnapshotChecker* Instance();
|
|
|
|
protected:
|
|
explicit DisableGCSnapshotChecker() {}
|
|
};
|
|
|
|
class WritePreparedTxnDB;
|
|
|
|
// Callback class created by WritePreparedTxnDB to check if a key
|
|
// is visible by a snapshot.
|
|
class WritePreparedSnapshotChecker : public SnapshotChecker {
|
|
public:
|
|
explicit WritePreparedSnapshotChecker(WritePreparedTxnDB* txn_db);
|
|
virtual ~WritePreparedSnapshotChecker() {}
|
|
|
|
virtual SnapshotCheckerResult CheckInSnapshot(
|
|
SequenceNumber sequence, SequenceNumber snapshot_sequence) const override;
|
|
|
|
private:
|
|
const WritePreparedTxnDB* const txn_db_;
|
|
};
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|