142 lines
4.7 KiB
Go
142 lines
4.7 KiB
Go
/*
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* Copyright 2023 The Dragonfly Authors
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* 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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*/
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//go:generate mockgen -destination mocks/storage_mock.go -source storage.go -package mocks
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package storage
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import (
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"fmt"
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"os"
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"path/filepath"
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"github.com/gocarina/gocsv"
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schedulerstorage "d7y.io/dragonfly/v2/scheduler/storage"
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)
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const (
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// DownloadFilePrefix is prefix of download file name.
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DownloadFilePrefix = "download"
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// NetworkTopologyFilePrefix is prefix of network topology file name.
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NetworkTopologyFilePrefix = "networktopology"
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// CSVFileExt is extension of file name.
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CSVFileExt = "csv"
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)
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// Storage is the interface used for storage.
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type Storage interface {
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// ListDownload returns downloads in csv files based on the given model key.
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ListDownload(string) ([]schedulerstorage.Download, error)
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// ListNetworkTopology returns network topologies in csv files based on the given model key.
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ListNetworkTopology(string) ([]schedulerstorage.NetworkTopology, error)
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// OpenDownload opens download files for read based on the given model key, it returns io.ReadCloser of download files.
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OpenDownload(string) (*os.File, error)
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// OpenNetworkTopology opens network topology files for read based on the given model key, it returns io.ReadCloser of network topology files.
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OpenNetworkTopology(string) (*os.File, error)
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// ClearDownload removes all downloads based on the given model key.
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ClearDownload(string) error
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// ClearNetworkTopology removes network topologies based on the given model key.
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ClearNetworkTopology(string) error
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// Clear removes all files.
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Clear() error
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}
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// storage provides storage function.
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type storage struct {
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baseDir string
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}
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// New returns a new Storage instance.
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func New(baseDir string) Storage {
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return &storage{baseDir: baseDir}
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}
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// ListDownload returns downloads in csv files based on the given model key.
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func (s *storage) ListDownload(modelKey string) ([]schedulerstorage.Download, error) {
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file, err := s.OpenDownload(modelKey)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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var downloads []schedulerstorage.Download
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if err := gocsv.UnmarshalWithoutHeaders(file, &downloads); err != nil {
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return nil, err
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}
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return downloads, nil
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}
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// ListNetworkTopology returns network topologies in csv files based on the given model key.
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func (s *storage) ListNetworkTopology(modelKey string) ([]schedulerstorage.NetworkTopology, error) {
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file, err := s.OpenNetworkTopology(modelKey)
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if err != nil {
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return nil, err
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}
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defer file.Close()
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var networkTopologies []schedulerstorage.NetworkTopology
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if err := gocsv.UnmarshalWithoutHeaders(file, &networkTopologies); err != nil {
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return nil, err
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}
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return networkTopologies, nil
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}
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// OpenDownload opens download files for read based on the given model key, it returns io.ReadCloser of download files.
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func (s *storage) OpenDownload(modelKey string) (*os.File, error) {
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return os.OpenFile(s.downloadFilename(modelKey), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
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}
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// OpenNetworkTopology opens network topology files for read based on the given model key, it returns io.ReadCloser of network topology files.
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func (s *storage) OpenNetworkTopology(modelKey string) (*os.File, error) {
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return os.OpenFile(s.networkTopologyFilename(modelKey), os.O_RDWR|os.O_CREATE|os.O_APPEND, 0600)
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}
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// ClearDownload removes downloads based on the given model key.
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func (s *storage) ClearDownload(modelKey string) error {
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return os.Remove(s.downloadFilename(modelKey))
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}
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// ClearNetworkTopology removes network topologies based on the given model key.
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func (s *storage) ClearNetworkTopology(modelKey string) error {
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return os.Remove(s.networkTopologyFilename(modelKey))
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}
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// Clear removes all files.
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func (s *storage) Clear() error {
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return os.RemoveAll(s.baseDir)
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}
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// downloadFilename generates download file name based on the given model key.
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func (s *storage) downloadFilename(modelKey string) string {
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return filepath.Join(s.baseDir, fmt.Sprintf("%s-%s.%s", DownloadFilePrefix, modelKey, CSVFileExt))
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}
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// networkTopologyFilename generates network topology file name based on the given model key.
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func (s *storage) networkTopologyFilename(modelKey string) string {
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return filepath.Join(s.baseDir, fmt.Sprintf("%s-%s.%s", NetworkTopologyFilePrefix, modelKey, CSVFileExt))
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}
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