forked from lni/dragonboat
/
chunkfile.go
88 lines (76 loc) · 2.32 KB
/
chunkfile.go
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// Copyright 2017-2019 Lei Ni (nilei81@gmail.com) and other contributors.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package transport
import (
"io"
"github.com/ik-tech/dragonboat/v3/internal/fileutil"
"github.com/ik-tech/dragonboat/v3/internal/vfs"
)
// ChunkFile is the snapshot chunk file being transferred.
type ChunkFile struct {
file vfs.File
syncDir bool
dir string
fs vfs.IFS
}
// OpenChunkFileForAppend opens the chunk file at fp for appending.
func OpenChunkFileForAppend(fp string, fs vfs.IFS) (*ChunkFile, error) {
f, err := fs.OpenForAppend(fp)
if err != nil {
return nil, err
}
return &ChunkFile{file: f, fs: fs}, nil
}
// OpenChunkFileForRead opens for the chunk file for read-only operation.
func OpenChunkFileForRead(fp string, fs vfs.IFS) (*ChunkFile, error) {
f, err := fs.Open(fp)
if err != nil {
return nil, err
}
return &ChunkFile{file: f, fs: fs}, nil
}
// CreateChunkFile creates a new chunk file.
func CreateChunkFile(fp string, fs vfs.IFS) (*ChunkFile, error) {
f, err := fs.Create(fp)
if err != nil {
return nil, err
}
return &ChunkFile{file: f, syncDir: true, dir: fs.PathDir(fp), fs: fs}, nil
}
// ReadAt reads from the file.
func (cf *ChunkFile) ReadAt(data []byte, offset int64) (int, error) {
return cf.file.ReadAt(data, offset)
}
// Read reads from the file.
func (cf *ChunkFile) Read(data []byte) (int, error) {
return io.ReadFull(cf.file, data)
}
// Write writes the specified data to the chunk file.
func (cf *ChunkFile) Write(data []byte) (int, error) {
return cf.file.Write(data)
}
// Close closes the chunk file.
func (cf *ChunkFile) Close() error {
if err := cf.file.Close(); err != nil {
return err
}
if cf.syncDir {
return fileutil.SyncDir(cf.dir, cf.fs)
}
return nil
}
// Sync syncs the chunk file.
func (cf *ChunkFile) Sync() error {
return cf.file.Sync()
}