seaweedfs/weed/filer/filerstore_translate_path.go

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package filer
import (
"context"
"github.com/seaweedfs/seaweedfs/weed/util"
"math"
"strings"
)
var (
_ = FilerStore(&FilerStorePathTranslator{})
)
type FilerStorePathTranslator struct {
actualStore FilerStore
storeRoot string
}
func NewFilerStorePathTranslator(storeRoot string, store FilerStore) *FilerStorePathTranslator {
if innerStore, ok := store.(*FilerStorePathTranslator); ok {
return innerStore
}
if !strings.HasSuffix(storeRoot, "/") {
storeRoot += "/"
}
return &FilerStorePathTranslator{
actualStore: store,
storeRoot: storeRoot,
}
}
func (t *FilerStorePathTranslator) translatePath(fp util.FullPath) (newPath util.FullPath) {
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newPath = fp
if t.storeRoot == "/" {
return
}
newPath = fp[len(t.storeRoot)-1:]
if newPath == "" {
newPath = "/"
}
return
}
func (t *FilerStorePathTranslator) changeEntryPath(entry *Entry) (previousPath util.FullPath) {
previousPath = entry.FullPath
if t.storeRoot == "/" {
return
}
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entry.FullPath = t.translatePath(previousPath)
return
}
func (t *FilerStorePathTranslator) recoverEntryPath(entry *Entry, previousPath util.FullPath) {
entry.FullPath = previousPath
}
func (t *FilerStorePathTranslator) GetName() string {
return t.actualStore.GetName()
}
func (t *FilerStorePathTranslator) Initialize(configuration util.Configuration, prefix string) error {
return t.actualStore.Initialize(configuration, prefix)
}
func (t *FilerStorePathTranslator) InsertEntry(ctx context.Context, entry *Entry) error {
previousPath := t.changeEntryPath(entry)
defer t.recoverEntryPath(entry, previousPath)
return t.actualStore.InsertEntry(ctx, entry)
}
func (t *FilerStorePathTranslator) UpdateEntry(ctx context.Context, entry *Entry) error {
previousPath := t.changeEntryPath(entry)
defer t.recoverEntryPath(entry, previousPath)
return t.actualStore.UpdateEntry(ctx, entry)
}
func (t *FilerStorePathTranslator) FindEntry(ctx context.Context, fp util.FullPath) (entry *Entry, err error) {
if t.storeRoot == "/" {
return t.actualStore.FindEntry(ctx, fp)
}
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newFullPath := t.translatePath(fp)
entry, err = t.actualStore.FindEntry(ctx, newFullPath)
if err == nil {
entry.FullPath = fp[:len(t.storeRoot)-1] + entry.FullPath
}
return
}
func (t *FilerStorePathTranslator) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
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newFullPath := t.translatePath(fp)
return t.actualStore.DeleteEntry(ctx, newFullPath)
}
func (t *FilerStorePathTranslator) DeleteOneEntry(ctx context.Context, existingEntry *Entry) (err error) {
previousPath := t.changeEntryPath(existingEntry)
defer t.recoverEntryPath(existingEntry, previousPath)
return t.actualStore.DeleteEntry(ctx, existingEntry.FullPath)
}
func (t *FilerStorePathTranslator) DeleteFolderChildren(ctx context.Context, fp util.FullPath) (err error) {
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newFullPath := t.translatePath(fp)
return t.actualStore.DeleteFolderChildren(ctx, newFullPath)
}
func (t *FilerStorePathTranslator) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, eachEntryFunc ListEachEntryFunc) (string, error) {
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newFullPath := t.translatePath(dirPath)
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return t.actualStore.ListDirectoryEntries(ctx, newFullPath, startFileName, includeStartFile, limit, func(entry *Entry) bool {
entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
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return eachEntryFunc(entry)
})
}
func (t *FilerStorePathTranslator) ListDirectoryPrefixedEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int64, prefix string, eachEntryFunc ListEachEntryFunc) (string, error) {
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newFullPath := t.translatePath(dirPath)
if limit > math.MaxInt32-1 {
limit = math.MaxInt32 - 1
}
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return t.actualStore.ListDirectoryPrefixedEntries(ctx, newFullPath, startFileName, includeStartFile, limit, prefix, func(entry *Entry) bool {
entry.FullPath = dirPath[:len(t.storeRoot)-1] + entry.FullPath
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return eachEntryFunc(entry)
})
}
func (t *FilerStorePathTranslator) BeginTransaction(ctx context.Context) (context.Context, error) {
return t.actualStore.BeginTransaction(ctx)
}
func (t *FilerStorePathTranslator) CommitTransaction(ctx context.Context) error {
return t.actualStore.CommitTransaction(ctx)
}
func (t *FilerStorePathTranslator) RollbackTransaction(ctx context.Context) error {
return t.actualStore.RollbackTransaction(ctx)
}
func (t *FilerStorePathTranslator) Shutdown() {
t.actualStore.Shutdown()
}
func (t *FilerStorePathTranslator) KvPut(ctx context.Context, key []byte, value []byte) (err error) {
return t.actualStore.KvPut(ctx, key, value)
}
func (t *FilerStorePathTranslator) KvGet(ctx context.Context, key []byte) (value []byte, err error) {
return t.actualStore.KvGet(ctx, key)
}
func (t *FilerStorePathTranslator) KvDelete(ctx context.Context, key []byte) (err error) {
return t.actualStore.KvDelete(ctx, key)
}