mirror of
https://gitee.com/milvus-io/milvus.git
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74 lines
2.1 KiB
Go
74 lines
2.1 KiB
Go
// Copyright (C) 2019-2020 Zilliz. All rights reserved.
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//
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// Licensed under the Apache License, Version 2.0 (the "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 distributed under the License
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// is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express
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// or implied. See the License for the specific language governing permissions and limitations under the License.
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package storage
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import (
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"errors"
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"io"
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miniokv "github.com/milvus-io/milvus/internal/kv/minio"
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)
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// MinioChunkManager is responsible for read and write data stored in minio.
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type MinioChunkManager struct {
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minio *miniokv.MinIOKV
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}
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// NewMinioChunkManager create a new local manager object.
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func NewMinioChunkManager(minio *miniokv.MinIOKV) *MinioChunkManager {
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return &MinioChunkManager{
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minio: minio,
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}
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}
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// GetPath returns the path of minio data if exist.
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func (mcm *MinioChunkManager) GetPath(key string) (string, error) {
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if !mcm.Exist(key) {
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return "", errors.New("minio file manage cannot be found with key:" + key)
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}
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return key, nil
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}
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// Write writes the data to minio storage.
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func (mcm *MinioChunkManager) Write(key string, content []byte) error {
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return mcm.minio.Save(key, string(content))
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}
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// Exist checks whether chunk is saved to minio storage.
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func (mcm *MinioChunkManager) Exist(key string) bool {
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return mcm.minio.Exist(key)
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}
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// Read reads the minio storage data if exist.
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func (mcm *MinioChunkManager) Read(key string) ([]byte, error) {
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results, err := mcm.minio.Load(key)
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return []byte(results), err
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}
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// ReadAt reads specific position data of minio storage if exist.
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func (mcm *MinioChunkManager) ReadAt(key string, p []byte, off int64) (int, error) {
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results, err := mcm.minio.Load(key)
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if err != nil {
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return -1, err
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}
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if off < 0 || int64(len([]byte(results))) < off {
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return 0, errors.New("MinioChunkManager: invalid offset")
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}
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n := copy(p, []byte(results)[off:])
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if n < len(p) {
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return n, io.EOF
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}
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return n, nil
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}
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