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https://github.com/ClickHouse/ClickHouse.git
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117 lines
3.2 KiB
C++
117 lines
3.2 KiB
C++
#pragma once
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#include <Disks/IDisk.h>
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#include <IO/ReadBufferFromFile.h>
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#include <IO/ReadBufferFromFileBase.h>
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#include <IO/WriteBufferFromFile.h>
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#include <Poco/DirectoryIterator.h>
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#include <Poco/File.h>
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namespace DB
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{
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namespace ErrorCodes
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{
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extern const int LOGICAL_ERROR;
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}
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class DiskLocalReservation;
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class DiskLocal : public IDisk
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{
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public:
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friend class DiskLocalReservation;
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DiskLocal(const String & name_, const String & path_, UInt64 keep_free_space_bytes_)
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: name(name_), disk_path(path_), keep_free_space_bytes(keep_free_space_bytes_)
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{
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if (disk_path.back() != '/')
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throw Exception("Disk path must ends with '/', but '" + disk_path + "' doesn't.", ErrorCodes::LOGICAL_ERROR);
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}
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const String & getName() const override { return name; }
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const String & getPath() const override { return disk_path; }
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ReservationPtr reserve(UInt64 bytes) override;
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UInt64 getTotalSpace() const override;
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UInt64 getAvailableSpace() const override;
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UInt64 getUnreservedSpace() const override;
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UInt64 getKeepingFreeSpace() const override { return keep_free_space_bytes; }
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bool exists(const String & path) const override;
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bool isFile(const String & path) const override;
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bool isDirectory(const String & path) const override;
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size_t getFileSize(const String & path) const override;
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void createDirectory(const String & path) override;
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void createDirectories(const String & path) override;
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void clearDirectory(const String & path) override;
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void moveDirectory(const String & from_path, const String & to_path) override;
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DiskDirectoryIteratorPtr iterateDirectory(const String & path) override;
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void createFile(const String & path) override;
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void moveFile(const String & from_path, const String & to_path) override;
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void replaceFile(const String & from_path, const String & to_path) override;
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void copyFile(const String & from_path, const String & to_path) override;
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void copy(const String & from_path, const std::shared_ptr<IDisk> & to_disk, const String & to_path) override;
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void listFiles(const String & path, std::vector<String> & file_names) override;
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std::unique_ptr<ReadBufferFromFileBase> readFile(
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const String & path,
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size_t buf_size,
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size_t estimated_size,
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size_t aio_threshold,
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size_t mmap_threshold) const override;
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std::unique_ptr<WriteBufferFromFileBase> writeFile(
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const String & path,
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size_t buf_size,
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WriteMode mode,
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size_t estimated_size,
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size_t aio_threshold) override;
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void remove(const String & path) override;
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void removeRecursive(const String & path) override;
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void setLastModified(const String & path, const Poco::Timestamp & timestamp) override;
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Poco::Timestamp getLastModified(const String & path) override;
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void setReadOnly(const String & path) override;
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void createHardLink(const String & src_path, const String & dst_path) override;
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private:
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bool tryReserve(UInt64 bytes);
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private:
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const String name;
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const String disk_path;
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const UInt64 keep_free_space_bytes;
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UInt64 reserved_bytes = 0;
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UInt64 reservation_count = 0;
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static std::mutex reservation_mutex;
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};
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}
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