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package filer
import (
"context"
"errors"
"github.com/chrislusf/seaweedfs/weed/glog"
"strings"
"time"
"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
"github.com/chrislusf/seaweedfs/weed/stats"
"github.com/chrislusf/seaweedfs/weed/util"
)
var (
ErrUnsupportedListDirectoryPrefixed = errors.New("unsupported directory prefix listing")
ErrKvNotImplemented = errors.New("kv not implemented yet")
ErrKvNotFound = errors.New("kv: not found")
)
type FilerStore interface {
// GetName gets the name to locate the configuration in filer.toml file
GetName() string
// Initialize initializes the file store
Initialize(configuration util.Configuration, prefix string) error
InsertEntry(context.Context, *Entry) error
UpdateEntry(context.Context, *Entry) (err error)
// err == filer_pb.ErrNotFound if not found
FindEntry(context.Context, util.FullPath) (entry *Entry, err error)
DeleteEntry(context.Context, util.FullPath) (err error)
DeleteFolderChildren(context.Context, util.FullPath) (err error)
ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int) ([]*Entry, error)
ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int, prefix string) ([]*Entry, error)
BeginTransaction(ctx context.Context) (context.Context, error)
CommitTransaction(ctx context.Context) error
RollbackTransaction(ctx context.Context) error
KvPut(ctx context.Context, key []byte, value []byte) (err error)
KvGet(ctx context.Context, key []byte) (value []byte, err error)
KvDelete(ctx context.Context, key []byte) (err error)
Shutdown()
}
type VirtualFilerStore interface {
FilerStore
DeleteHardLink(ctx context.Context, hardLinkId HardLinkId) error
DeleteOneEntry(ctx context.Context, entry *Entry) error
}
type FilerStoreWrapper struct {
ActualStore FilerStore
}
func NewFilerStoreWrapper(store FilerStore) *FilerStoreWrapper {
if innerStore, ok := store.(*FilerStoreWrapper); ok {
return innerStore
}
return &FilerStoreWrapper{
ActualStore: store,
}
}
func (fsw *FilerStoreWrapper) GetName() string {
return fsw.ActualStore.GetName()
}
func (fsw *FilerStoreWrapper) Initialize(configuration util.Configuration, prefix string) error {
return fsw.ActualStore.Initialize(configuration, prefix)
}
func (fsw *FilerStoreWrapper) InsertEntry(ctx context.Context, entry *Entry) error {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "insert").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "insert").Observe(time.Since(start).Seconds())
}()
filer_pb.BeforeEntrySerialization(entry.Chunks)
if entry.Mime == "application/octet-stream" {
entry.Mime = ""
}
if err := fsw.handleUpdateToHardLinks(ctx, entry); err != nil {
return err
}
glog.V(4).Infof("InsertEntry %s", entry.FullPath)
return fsw.ActualStore.InsertEntry(ctx, entry)
}
func (fsw *FilerStoreWrapper) UpdateEntry(ctx context.Context, entry *Entry) error {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "update").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "update").Observe(time.Since(start).Seconds())
}()
filer_pb.BeforeEntrySerialization(entry.Chunks)
if entry.Mime == "application/octet-stream" {
entry.Mime = ""
}
if err := fsw.handleUpdateToHardLinks(ctx, entry); err != nil {
return err
}
glog.V(4).Infof("UpdateEntry %s", entry.FullPath)
return fsw.ActualStore.UpdateEntry(ctx, entry)
}
func (fsw *FilerStoreWrapper) FindEntry(ctx context.Context, fp util.FullPath) (entry *Entry, err error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "find").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "find").Observe(time.Since(start).Seconds())
}()
glog.V(4).Infof("FindEntry %s", fp)
entry, err = fsw.ActualStore.FindEntry(ctx, fp)
if err != nil {
return nil, err
}
fsw.maybeReadHardLink(ctx, entry)
filer_pb.AfterEntryDeserialization(entry.Chunks)
return
}
func (fsw *FilerStoreWrapper) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "delete").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "delete").Observe(time.Since(start).Seconds())
}()
existingEntry, findErr := fsw.FindEntry(ctx, fp)
if findErr == filer_pb.ErrNotFound {
return nil
}
if len(existingEntry.HardLinkId) != 0 {
// remove hard link
glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
return err
}
}
glog.V(4).Infof("DeleteEntry %s", fp)
return fsw.ActualStore.DeleteEntry(ctx, fp)
}
func (fsw *FilerStoreWrapper) DeleteOneEntry(ctx context.Context, existingEntry *Entry) (err error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "delete").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "delete").Observe(time.Since(start).Seconds())
}()
if len(existingEntry.HardLinkId) != 0 {
// remove hard link
glog.V(4).Infof("DeleteHardLink %s", existingEntry.FullPath)
if err = fsw.DeleteHardLink(ctx, existingEntry.HardLinkId); err != nil {
return err
}
}
glog.V(4).Infof("DeleteOneEntry %s", existingEntry.FullPath)
return fsw.ActualStore.DeleteEntry(ctx, existingEntry.FullPath)
}
func (fsw *FilerStoreWrapper) DeleteFolderChildren(ctx context.Context, fp util.FullPath) (err error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "deleteFolderChildren").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "deleteFolderChildren").Observe(time.Since(start).Seconds())
}()
glog.V(4).Infof("DeleteFolderChildren %s", fp)
return fsw.ActualStore.DeleteFolderChildren(ctx, fp)
}
func (fsw *FilerStoreWrapper) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int) ([]*Entry, error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "list").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "list").Observe(time.Since(start).Seconds())
}()
glog.V(4).Infof("ListDirectoryEntries %s from %s limit %d", dirPath, startFileName, limit)
entries, err := fsw.ActualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit)
if err != nil {
return nil, err
}
for _, entry := range entries {
fsw.maybeReadHardLink(ctx, entry)
filer_pb.AfterEntryDeserialization(entry.Chunks)
}
return entries, err
}
func (fsw *FilerStoreWrapper) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int, prefix string) ([]*Entry, error) {
stats.FilerStoreCounter.WithLabelValues(fsw.ActualStore.GetName(), "prefixList").Inc()
start := time.Now()
defer func() {
stats.FilerStoreHistogram.WithLabelValues(fsw.ActualStore.GetName(), "prefixList").Observe(time.Since(start).Seconds())
}()
glog.V(4).Infof("ListDirectoryPrefixedEntries %s from %s prefix %s limit %d", dirPath, startFileName, prefix, limit)
entries, err := fsw.ActualStore.ListDirectoryPrefixedEntries(ctx, dirPath, startFileName, includeStartFile, limit, prefix)
if err == ErrUnsupportedListDirectoryPrefixed {
entries, err = fsw.prefixFilterEntries(ctx, dirPath, startFileName, includeStartFile, limit, prefix)
}
if err != nil {
return nil, err
}
for _, entry := range entries {
fsw.maybeReadHardLink(ctx, entry)
filer_pb.AfterEntryDeserialization(entry.Chunks)
}
return entries, nil
}
func (fsw *FilerStoreWrapper) prefixFilterEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int, prefix string) (entries []*Entry, err error) {
entries, err = fsw.ActualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit)
if err != nil {
return nil, err
}
if prefix == "" {
return
}
count := 0
var lastFileName string
notPrefixed := entries
entries = nil
for count < limit && len(notPrefixed) > 0 {
for _, entry := range notPrefixed {
lastFileName = entry.Name()
if strings.HasPrefix(entry.Name(), prefix) {
count++
entries = append(entries, entry)
if count >= limit {
break
}
}
}
if count < limit {
notPrefixed, err = fsw.ActualStore.ListDirectoryEntries(ctx, dirPath, lastFileName, false, limit)
if err != nil {
return
}
}
}
return
}
func (fsw *FilerStoreWrapper) BeginTransaction(ctx context.Context) (context.Context, error) {
return fsw.ActualStore.BeginTransaction(ctx)
}
func (fsw *FilerStoreWrapper) CommitTransaction(ctx context.Context) error {
return fsw.ActualStore.CommitTransaction(ctx)
}
func (fsw *FilerStoreWrapper) RollbackTransaction(ctx context.Context) error {
return fsw.ActualStore.RollbackTransaction(ctx)
}
func (fsw *FilerStoreWrapper) Shutdown() {
fsw.ActualStore.Shutdown()
}
func (fsw *FilerStoreWrapper) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
return fsw.ActualStore.KvPut(ctx, key, value)
}
func (fsw *FilerStoreWrapper) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
return fsw.ActualStore.KvGet(ctx, key)
}
func (fsw *FilerStoreWrapper) KvDelete(ctx context.Context, key []byte) (err error) {
return fsw.ActualStore.KvDelete(ctx, key)
}
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