/
dataset.go
239 lines (218 loc) · 5.58 KB
/
dataset.go
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package data
import (
"bufio"
"encoding/json"
"fmt"
"log"
"os"
"path"
"time"
"github.com/bgokden/go-cache"
"github.com/pkg/errors"
pb "github.com/bgokden/veri/veriservice"
)
type Dataset struct {
DataList *cache.Cache
Path string
DataPath string
}
func closeData(key string, value interface{}) {
if data, ok := value.(*Data); ok {
data.Close()
}
}
func NewDataset(datasetPath string) *Dataset {
dts := &Dataset{
Path: datasetPath,
}
dts.DataList = cache.New(24*time.Hour, 1*time.Minute)
dts.DataList.OnEvicted(closeData)
dts.DataPath = path.Join(dts.Path, "data")
os.MkdirAll(dts.DataPath, os.ModePerm)
err := dts.LoadIndex()
if err != nil {
log.Printf("Loading error: %v\n", err)
}
return dts
}
func GetDefaultConfig(name string) *pb.DataConfig {
return &pb.DataConfig{
Name: name,
Version: 0,
TargetN: 1000,
TargetUtilization: 0.4,
NoTarget: false,
ReplicationOnInsert: 1,
EnforceReplicationOnInsert: true,
Retention: 0,
}
}
func GetRetention(retention uint64) time.Duration {
if retention == 0 {
return time.Duration(14*24) * time.Hour
}
return time.Duration(retention) * time.Second
}
func (dts *Dataset) Get(name string) (*Data, error) {
item, ok := dts.DataList.Get(name)
if !ok {
return dts.GetOrCreateIfNotExists(GetDefaultConfig(name))
}
if data, ok := item.(*Data); ok {
dts.DataList.IncrementExpiration(name, GetRetention(data.GetConfig().Retention))
return data, nil
}
return nil, errors.Errorf("Data %v is currupt", name)
}
func (dts *Dataset) GetNoOp(name string) (*Data, error) {
item, ok := dts.DataList.Get(name)
if !ok {
return dts.GetOrCreateIfNotExists(GetDefaultConfig(name))
}
if data, ok := item.(*Data); ok {
return data, nil
}
return nil, errors.Errorf("Data %v is currupt", name)
}
func (dts *Dataset) GetNoCreate(name string) (*Data, error) {
item, ok := dts.DataList.Get(name)
if !ok {
return nil, errors.Errorf("Data %v does not exist. Retry recomended", name)
}
if data, ok := item.(*Data); ok {
return data, nil
}
return nil, errors.Errorf("Data %v is currupt", name)
}
func (dts *Dataset) GetOrCreateIfNotExists(config *pb.DataConfig) (*Data, error) {
err := dts.CreateIfNotExists(config)
if err != nil {
return nil, err
}
return dts.Get(config.Name)
}
func (dts *Dataset) CreateIfNotExists(config *pb.DataConfig) error {
preData := NewPreData(config, dts.DataPath)
retention := GetRetention(config.Retention)
// log.Printf("Data %v Retention: %v Version: %v\n", config.Name, retention, config.Version)
err := dts.DataList.Add(config.Name, preData, retention)
if err == nil {
go dts.SaveIndex()
return preData.InitData()
}
// log.Printf("Data %v Error: %v\n", config.Name, err.Error())
if err.Error() == fmt.Sprintf("Item %s already exists", config.Name) {
data, errGetNoOp := dts.GetNoOp(config.Name)
if errGetNoOp == nil {
if config.Version > data.Config.Version {
log.Printf("Update Data %v Config.Version: %v\n", config.Name, config.Version)
data.Config = config
}
} else {
log.Printf("Error errGetNoOp: %v\n", errGetNoOp.Error())
}
return nil
}
return err
}
func (dts *Dataset) Delete(name string) error {
item, ok := dts.DataList.Get(name)
if !ok {
return errors.Errorf("Data %v does not exist", name)
}
if data, ok := item.(*Data); ok {
data.Close()
}
dts.DataList.Delete(name)
go dts.SaveIndex()
return nil
}
func (dts *Dataset) List() []string {
sourceList := dts.DataList.Items()
keys := make([]string, 0, len(sourceList))
for k := range sourceList {
keys = append(keys, k)
}
go dts.SaveIndex()
return keys
}
func (dts *Dataset) DataConfigList() []*pb.DataConfig {
sourceList := dts.DataList.Items()
configs := make([]*pb.DataConfig, 0, len(sourceList))
for k := range sourceList {
data, _ := dts.Get(k)
config := data.GetConfig()
configs = append(configs, config)
}
return configs
}
func (dts *Dataset) LoadIndex() error {
indexPath := path.Join(dts.Path, "index.save")
file, err := os.OpenFile(indexPath, os.O_APPEND|os.O_CREATE|os.O_RDONLY, 0644)
if err != nil {
return err
}
reader := bufio.NewReader(file)
for {
line, err := reader.ReadString('\n')
if err != nil {
break
}
var config pb.DataConfig
if err := json.Unmarshal([]byte(line), &config); err == nil {
err2 := dts.CreateIfNotExists(&config)
if err2 != nil {
log.Printf("Err creatding data: %v\n", err2)
}
}
}
file.Close()
return nil
}
func (dts *Dataset) ReloadRuns() error {
itemList := dts.DataList.Items()
removeList := make([]string, 0, len(itemList))
for key, itemInterface := range itemList {
if item, ok := itemInterface.Object.(*Data); ok {
if item.CheckIfActive() {
go item.Run()
} else {
item.Close()
removeList = append(removeList, key)
}
}
}
for _, key := range removeList {
dts.DataList.Delete(key)
}
return nil
}
func (dts *Dataset) SaveIndex() error {
indexPath := path.Join(dts.Path, "index.save")
sourceList := dts.DataList.Items()
file, err := os.OpenFile(indexPath, os.O_TRUNC|os.O_APPEND|os.O_CREATE|os.O_WRONLY, 0644)
if err != nil {
return err
}
datawriter := bufio.NewWriter(file)
for k := range sourceList {
data, _ := dts.Get(k)
config := data.GetConfig()
jsonData, _ := json.Marshal(config)
_, _ = datawriter.WriteString(string(jsonData) + "\n")
}
datawriter.Flush()
file.Close()
return nil
}
func (dts *Dataset) Close() error {
dts.SaveIndex()
datalist := dts.DataList.Items()
for k := range datalist {
data, err := dts.Get(k)
if err == nil {
data.Close()
}
}
return nil
}