2020-10-19 19:12:53 +02:00
|
|
|
// 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 "rocksdb/types.h"
|
|
|
|
#include "rocksdb/utilities/transaction.h"
|
|
|
|
#include "rocksdb/utilities/transaction_db.h"
|
|
|
|
#include "utilities/transactions/lock/lock_tracker.h"
|
|
|
|
#include "utilities/transactions/pessimistic_transaction.h"
|
|
|
|
|
|
|
|
namespace ROCKSDB_NAMESPACE {
|
|
|
|
|
|
|
|
class PessimisticTransactionDB;
|
|
|
|
|
|
|
|
class LockManager {
|
|
|
|
public:
|
|
|
|
virtual ~LockManager() {}
|
|
|
|
|
|
|
|
// Whether supports locking a specific key.
|
|
|
|
virtual bool IsPointLockSupported() const = 0;
|
|
|
|
|
|
|
|
// Whether supports locking a range of keys.
|
|
|
|
virtual bool IsRangeLockSupported() const = 0;
|
|
|
|
|
|
|
|
// Locks acquired through this LockManager should be tracked by
|
|
|
|
// the LockTrackers created through the returned factory.
|
|
|
|
virtual const LockTrackerFactory& GetLockTrackerFactory() const = 0;
|
|
|
|
|
|
|
|
// Enable locking for the specified column family.
|
|
|
|
// Caller should guarantee that this column family is not already enabled.
|
|
|
|
virtual void AddColumnFamily(const ColumnFamilyHandle* cf) = 0;
|
|
|
|
|
|
|
|
// Disable locking for the specified column family.
|
|
|
|
// Caller should guarantee that this column family is no longer used.
|
|
|
|
virtual void RemoveColumnFamily(const ColumnFamilyHandle* cf) = 0;
|
|
|
|
|
|
|
|
// Attempt to lock a key or a key range. If OK status is returned, the caller
|
|
|
|
// is responsible for calling UnLock() on this key.
|
|
|
|
virtual Status TryLock(PessimisticTransaction* txn,
|
|
|
|
ColumnFamilyId column_family_id,
|
|
|
|
const std::string& key, Env* env, bool exclusive) = 0;
|
|
|
|
// The range [start, end] are inclusive at both sides.
|
|
|
|
virtual Status TryLock(PessimisticTransaction* txn,
|
|
|
|
ColumnFamilyId column_family_id, const Endpoint& start,
|
|
|
|
const Endpoint& end, Env* env, bool exclusive) = 0;
|
|
|
|
|
|
|
|
// Unlock a key or a range locked by TryLock(). txn must be the same
|
|
|
|
// Transaction that locked this key.
|
|
|
|
virtual void UnLock(PessimisticTransaction* txn, const LockTracker& tracker,
|
|
|
|
Env* env) = 0;
|
|
|
|
virtual void UnLock(PessimisticTransaction* txn,
|
|
|
|
ColumnFamilyId column_family_id, const std::string& key,
|
|
|
|
Env* env) = 0;
|
|
|
|
virtual void UnLock(PessimisticTransaction* txn,
|
|
|
|
ColumnFamilyId column_family_id, const Endpoint& start,
|
|
|
|
const Endpoint& end, Env* env) = 0;
|
|
|
|
|
|
|
|
using PointLockStatus = std::unordered_multimap<ColumnFamilyId, KeyLockInfo>;
|
|
|
|
virtual PointLockStatus GetPointLockStatus() = 0;
|
|
|
|
|
|
|
|
using RangeLockStatus =
|
|
|
|
std::unordered_multimap<ColumnFamilyId, RangeLockInfo>;
|
|
|
|
virtual RangeLockStatus GetRangeLockStatus() = 0;
|
|
|
|
|
|
|
|
virtual std::vector<DeadlockPath> GetDeadlockInfoBuffer() = 0;
|
|
|
|
|
|
|
|
virtual void Resize(uint32_t new_size) = 0;
|
|
|
|
};
|
|
|
|
|
|
|
|
// LockManager should always be constructed through this factory method,
|
|
|
|
// instead of constructing through concrete implementations' constructor.
|
|
|
|
// Caller owns the returned pointer.
|
2020-12-08 05:16:18 +01:00
|
|
|
std::shared_ptr<LockManager> NewLockManager(PessimisticTransactionDB* db,
|
|
|
|
const TransactionDBOptions& opt);
|
2020-10-19 19:12:53 +02:00
|
|
|
|
|
|
|
} // namespace ROCKSDB_NAMESPACE
|
|
|
|
|
|
|
|
#endif // ROCKSDB_LITE
|