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openStorage.go
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openStorage.go
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package factory
import (
"fmt"
"path/filepath"
"time"
"github.com/ElrondNetwork/elrond-go/config"
"github.com/ElrondNetwork/elrond-go/core"
"github.com/ElrondNetwork/elrond-go/marshal"
"github.com/ElrondNetwork/elrond-go/process/block/bootstrapStorage"
"github.com/ElrondNetwork/elrond-go/storage"
"github.com/ElrondNetwork/elrond-go/storage/lrucache"
"github.com/ElrondNetwork/elrond-go/storage/storageUnit"
)
// ArgsNewOpenStorageUnits defines the arguments in order to open a set of storage units from disk
type ArgsNewOpenStorageUnits struct {
GeneralConfig config.Config
Marshalizer marshal.Marshalizer
BootstrapDataProvider BootstrapDataProviderHandler
LatestStorageDataProvider storage.LatestStorageDataProviderHandler
WorkingDir string
ChainID string
DefaultDBPath string
DefaultEpochString string
DefaultShardString string
}
type openStorageUnits struct {
generalConfig config.Config
marshalizer marshal.Marshalizer
bootstrapDataProvider BootstrapDataProviderHandler
latestStorageDataProvider storage.LatestStorageDataProviderHandler
workingDir string
chainID string
defaultDBPath string
defaultEpochString string
defaultShardString string
}
// NewStorageUnitOpenHandler creates an openStorageUnits component
func NewStorageUnitOpenHandler(args ArgsNewOpenStorageUnits) (*openStorageUnits, error) {
o := &openStorageUnits{
generalConfig: args.GeneralConfig,
marshalizer: args.Marshalizer,
workingDir: args.WorkingDir,
chainID: args.ChainID,
defaultDBPath: args.DefaultDBPath,
defaultEpochString: args.DefaultEpochString,
defaultShardString: args.DefaultShardString,
bootstrapDataProvider: args.BootstrapDataProvider,
latestStorageDataProvider: args.LatestStorageDataProvider,
}
return o, nil
}
// GetMostRecentBootstrapStorageUnit will open bootstrap storage unit
func (o *openStorageUnits) GetMostRecentBootstrapStorageUnit() (storage.Storer, error) {
parentDir, lastEpoch, err := o.latestStorageDataProvider.GetParentDirAndLastEpoch()
if err != nil {
return nil, err
}
// TODO: refactor this - as it works with bootstrap storage unit only
persisterFactory := NewPersisterFactory(o.generalConfig.BootstrapStorage.DB)
pathWithoutShard := filepath.Join(
parentDir,
fmt.Sprintf("%s_%d", o.defaultEpochString, lastEpoch),
)
shardIdsStr, err := o.latestStorageDataProvider.GetShardsFromDirectory(pathWithoutShard)
if err != nil {
return nil, err
}
mostRecentShard, err := o.getMostUpToDateDirectory(pathWithoutShard, shardIdsStr, persisterFactory)
if err != nil {
return nil, err
}
persisterPath := filepath.Join(
pathWithoutShard,
fmt.Sprintf("%s_%s", o.defaultShardString, mostRecentShard),
o.generalConfig.BootstrapStorage.DB.FilePath,
)
persister, err := createDB(persisterFactory, persisterPath)
if err != nil {
return nil, err
}
cacher, err := lrucache.NewCache(10)
if err != nil {
return nil, err
}
storer, err := storageUnit.NewStorageUnit(cacher, persister)
if err != nil {
return nil, err
}
return storer, nil
}
func createDB(persisterFactory *PersisterFactory, persisterPath string) (storage.Persister, error) {
var persister storage.Persister
var err error
for i := 0; i < core.MaxRetriesToCreateDB; i++ {
persister, err = persisterFactory.Create(persisterPath)
if err == nil {
return persister, nil
}
log.Warn("Create Persister failed", "path", persisterPath, "error", err)
time.Sleep(core.SleepTimeBetweenCreateDBRetries)
}
return nil, err
}
func (o *openStorageUnits) getMostUpToDateDirectory(
pathWithoutShard string,
shardIdsStr []string,
persisterFactory *PersisterFactory,
) (string, error) {
var mostRecentShard string
highestRoundInStoredShards := int64(0)
for _, shardIdStr := range shardIdsStr {
persisterPath := filepath.Join(
pathWithoutShard,
fmt.Sprintf("%s_%s", o.defaultShardString, shardIdStr),
o.generalConfig.BootstrapStorage.DB.FilePath,
)
bootstrapData, errGet := o.loadDataForShard(persisterFactory, persisterPath)
if errGet != nil {
continue
}
if bootstrapData.LastRound > highestRoundInStoredShards {
highestRoundInStoredShards = bootstrapData.LastRound
mostRecentShard = shardIdStr
}
}
if len(mostRecentShard) == 0 {
return "", storage.ErrBootstrapDataNotFoundInStorage
}
return mostRecentShard, nil
}
func (o *openStorageUnits) loadDataForShard(
persisterFactory storage.PersisterFactory,
persisterPath string,
) (*bootstrapStorage.BootstrapData, error) {
bootstrapData, storer, err := o.bootstrapDataProvider.LoadForPath(persisterFactory, persisterPath)
defer func() {
if storer != nil {
errClose := storer.Close()
if errClose != nil {
log.Debug("openStorageunits: error closing storer",
"persister path", persisterPath,
"error", errClose)
}
}
}()
return bootstrapData, err
}
// IsInterfaceNil returns true if there is no value under the interface
func (o *openStorageUnits) IsInterfaceNil() bool {
return o == nil
}