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149 lines
3.7 KiB
C++
149 lines
3.7 KiB
C++
// Licensed to the LF AI & Data foundation under one
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// or more contributor license agreements. See the NOTICE file
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// distributed with this work for additional information
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// regarding copyright ownership. The ASF licenses this file
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// to you under the Apache License, Version 2.0 (the
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// "License"); you may not use this file except in compliance
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// with the License. You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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#pragma once
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#include <memory>
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#include <string>
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#include <vector>
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#include "storage/ChunkManager.h"
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namespace milvus::storage {
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/**
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* @brief LocalChunkManager is responsible for read and write local file
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* that inherited from ChunkManager
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*/
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class LocalChunkManager : public ChunkManager {
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public:
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explicit LocalChunkManager(const std::string& path) : path_prefix_(path) {
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}
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LocalChunkManager(const LocalChunkManager&);
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LocalChunkManager&
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operator=(const LocalChunkManager&);
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public:
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virtual ~LocalChunkManager() {
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}
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virtual bool
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Exist(const std::string& filepath);
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/**
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* @brief Get file's size
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* if file not exist, throw exception
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* @param filepath
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* @return uint64_t
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*/
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virtual uint64_t
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Size(const std::string& filepath);
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virtual uint64_t
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Read(const std::string& filepath, void* buf, uint64_t len);
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/**
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* @brief Write buf to file
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* if file not exists, wAill create it automatically
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* not append mode, truncate mode
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* @param filepath
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* @param buf
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* @param len
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*/
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virtual void
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Write(const std::string& filepath, void* buf, uint64_t len);
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/**
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* @brief Write buf to file with specified location.
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* if file not exist, will throw exception instead of create it
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* @param filepath
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* @param offset
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* @param buf
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* @param len
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* @return uint64_t
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*/
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virtual uint64_t
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Read(const std::string& filepath, uint64_t offset, void* buf, uint64_t len);
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virtual void
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Write(const std::string& filepath,
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uint64_t offset,
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void* buf,
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uint64_t len);
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virtual std::vector<std::string>
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ListWithPrefix(const std::string& filepath);
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/**
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* @brief Remove file no matter whether file exists
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* or not
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* @param filepath
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*/
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virtual void
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Remove(const std::string& filepath);
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virtual std::string
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GetName() const {
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return "LocalChunkManager";
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}
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virtual std::string
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GetRootPath() const {
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return path_prefix_;
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}
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virtual std::string
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GetBucketName() const {
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return "";
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}
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bool
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CreateFile(const std::string& filepath);
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public:
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bool
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DirExist(const std::string& dir);
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/**
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* @brief Delete directory totally
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* different from Remove, this interface drop local dir
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* instead of file, but for remote system, may has no
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* concept of directory, so just used in local chunk manager
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* @param dir
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*/
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void
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RemoveDir(const std::string& dir);
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/**
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* @brief Create a Dir object
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* if dir already exists, throw exception
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* @param dir
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*/
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void
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CreateDir(const std::string& dir);
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int64_t
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GetSizeOfDir(const std::string& dir);
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private:
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std::string path_prefix_;
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};
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using LocalChunkManagerSPtr =
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std::shared_ptr<milvus::storage::LocalChunkManager>;
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} // namespace milvus::storage
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