github.com/uber/kraken@v0.1.4/lib/store/upload_store.go (about)

     1  // Copyright (c) 2016-2019 Uber Technologies, Inc.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  package store
    15  
    16  import (
    17  	"fmt"
    18  	"os"
    19  
    20  	"github.com/uber/kraken/lib/store/base"
    21  	"github.com/uber/kraken/lib/store/metadata"
    22  	"github.com/andres-erbsen/clock"
    23  )
    24  
    25  // uploadStore provides basic upload file operations. Intended to be embedded
    26  // in a higher level struct.
    27  type uploadStore struct {
    28  	state   base.FileState
    29  	backend base.FileStore
    30  }
    31  
    32  func newUploadStore(dir string) (*uploadStore, error) {
    33  	// Always wipe upload directory on startup.
    34  	os.RemoveAll(dir)
    35  
    36  	if err := os.MkdirAll(dir, 0775); err != nil {
    37  		return nil, fmt.Errorf("mkdir: %s", err)
    38  	}
    39  	state := base.NewFileState(dir)
    40  	backend := base.NewLocalFileStore(clock.New())
    41  	return &uploadStore{state, backend}, nil
    42  }
    43  
    44  func (s *uploadStore) CreateUploadFile(name string, length int64) error {
    45  	return s.backend.NewFileOp().CreateFile(name, s.state, length)
    46  }
    47  
    48  func (s *uploadStore) GetUploadFileStat(name string) (os.FileInfo, error) {
    49  	return s.newFileOp().GetFileStat(name)
    50  }
    51  
    52  func (s *uploadStore) GetUploadFileReader(name string) (FileReader, error) {
    53  	return s.newFileOp().GetFileReader(name)
    54  }
    55  
    56  func (s *uploadStore) GetUploadFileReadWriter(name string) (FileReadWriter, error) {
    57  	return s.newFileOp().GetFileReadWriter(name)
    58  }
    59  
    60  func (s *uploadStore) GetUploadFileMetadata(name string, md metadata.Metadata) error {
    61  	return s.newFileOp().GetFileMetadata(name, md)
    62  }
    63  
    64  func (s *uploadStore) SetUploadFileMetadata(name string, md metadata.Metadata) error {
    65  	_, err := s.newFileOp().SetFileMetadata(name, md)
    66  	return err
    67  }
    68  
    69  func (s *uploadStore) RangeUploadMetadata(name string, f func(metadata.Metadata) error) error {
    70  	return s.newFileOp().RangeFileMetadata(name, f)
    71  }
    72  
    73  func (s *uploadStore) DeleteUploadFile(name string) error {
    74  	return s.newFileOp().DeleteFile(name)
    75  }
    76  
    77  func (s *uploadStore) newFileOp() base.FileOp {
    78  	return s.backend.NewFileOp().AcceptState(s.state)
    79  }