51 lines
1.8 KiB
C++
51 lines
1.8 KiB
C++
#pragma once
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#include <memory>
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#include "../IStorage.h"
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#include <rocksdb/db.h>
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#include "../fastlock.h"
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#define INTERNAL_KEY_PREFIX "\x00\x04\x03\x00\x05\x02\x04"
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static const char count_key[] = INTERNAL_KEY_PREFIX "__keydb__count\1";
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static const char version_key[] = INTERNAL_KEY_PREFIX "__keydb__version\1";
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class RocksDBStorageProvider : public IStorage
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{
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std::shared_ptr<rocksdb::DB> m_spdb; // Note: This must be first so it is deleted last
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std::unique_ptr<rocksdb::WriteBatch> m_spbatch;
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const rocksdb::Snapshot *m_psnapshot = nullptr;
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std::shared_ptr<rocksdb::ColumnFamilyHandle> m_spcolfamily;
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rocksdb::ReadOptions m_readOptionsTemplate;
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size_t m_count = 0;
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mutable fastlock m_lock {"RocksDBStorageProvider"};
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public:
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RocksDBStorageProvider(std::shared_ptr<rocksdb::DB> &spdb, std::shared_ptr<rocksdb::ColumnFamilyHandle> &spcolfam, const rocksdb::Snapshot *psnapshot, size_t count);
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~RocksDBStorageProvider();
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virtual void insert(const char *key, size_t cchKey, void *data, size_t cb, bool fOverwrite) override;
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virtual bool erase(const char *key, size_t cchKey) override;
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virtual void retrieve(const char *key, size_t cchKey, callbackSingle fn) const override;
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virtual size_t clear() override;
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virtual bool enumerate(callback fn) const override;
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virtual const IStorage *clone() const override;
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virtual void beginWriteBatch() override;
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virtual void endWriteBatch() override;
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virtual void batch_lock() override;
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virtual void batch_unlock() override;
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virtual void flush() override;
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size_t count() const;
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protected:
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bool FKeyExists(const char *key, size_t cchKey) const;
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const rocksdb::ReadOptions &ReadOptions() const { return m_readOptionsTemplate; }
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rocksdb::WriteOptions WriteOptions() const;
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};
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bool FInternalKey(const char *key, size_t cch); |