You can not select more than 25 topics
Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
93 lines
2.2 KiB
93 lines
2.2 KiB
package meta_cache
|
|
|
|
import (
|
|
"context"
|
|
"os"
|
|
"sync"
|
|
|
|
"github.com/chrislusf/seaweedfs/weed/filer2"
|
|
"github.com/chrislusf/seaweedfs/weed/filer2/leveldb"
|
|
"github.com/chrislusf/seaweedfs/weed/glog"
|
|
"github.com/chrislusf/seaweedfs/weed/util"
|
|
)
|
|
|
|
type MetaCache struct {
|
|
actualStore filer2.FilerStore
|
|
sync.RWMutex
|
|
}
|
|
|
|
func NewMetaCache(dbFolder string) *MetaCache {
|
|
return &MetaCache{
|
|
actualStore: openMetaStore(dbFolder),
|
|
}
|
|
}
|
|
|
|
func openMetaStore(dbFolder string) filer2.FilerStore {
|
|
|
|
os.RemoveAll(dbFolder)
|
|
os.MkdirAll(dbFolder, 0755)
|
|
|
|
store := &leveldb.LevelDBStore{}
|
|
config := &cacheConfig{
|
|
dir: dbFolder,
|
|
}
|
|
|
|
if err := store.Initialize(config, ""); err != nil {
|
|
glog.Fatalf("Failed to initialize metadata cache store for %s: %+v", store.GetName(), err)
|
|
}
|
|
|
|
return store
|
|
|
|
}
|
|
|
|
func (mc *MetaCache) InsertEntry(ctx context.Context, entry *filer2.Entry) error {
|
|
mc.Lock()
|
|
defer mc.Unlock()
|
|
return mc.actualStore.InsertEntry(ctx, entry)
|
|
}
|
|
|
|
func (mc *MetaCache) AtomicUpdateEntry(ctx context.Context, oldPath util.FullPath, newEntry *filer2.Entry) error {
|
|
mc.Lock()
|
|
defer mc.Unlock()
|
|
if oldPath != "" {
|
|
if err := mc.actualStore.DeleteEntry(ctx, oldPath); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
if newEntry != nil {
|
|
if err := mc.actualStore.InsertEntry(ctx, newEntry); err != nil {
|
|
return err
|
|
}
|
|
}
|
|
return nil
|
|
}
|
|
|
|
func (mc *MetaCache) UpdateEntry(ctx context.Context, entry *filer2.Entry) error {
|
|
mc.Lock()
|
|
defer mc.Unlock()
|
|
return mc.actualStore.UpdateEntry(ctx, entry)
|
|
}
|
|
|
|
func (mc *MetaCache) FindEntry(ctx context.Context, fp util.FullPath) (entry *filer2.Entry, err error) {
|
|
mc.RLock()
|
|
defer mc.RUnlock()
|
|
return mc.actualStore.FindEntry(ctx, fp)
|
|
}
|
|
|
|
func (mc *MetaCache) DeleteEntry(ctx context.Context, fp util.FullPath) (err error) {
|
|
mc.Lock()
|
|
defer mc.Unlock()
|
|
return mc.actualStore.DeleteEntry(ctx, fp)
|
|
}
|
|
|
|
func (mc *MetaCache) ListDirectoryEntries(ctx context.Context, dirPath util.FullPath, startFileName string, includeStartFile bool, limit int) ([]*filer2.Entry, error) {
|
|
mc.RLock()
|
|
defer mc.RUnlock()
|
|
return mc.actualStore.ListDirectoryEntries(ctx, dirPath, startFileName, includeStartFile, limit)
|
|
}
|
|
|
|
func (mc *MetaCache) Shutdown() {
|
|
mc.Lock()
|
|
defer mc.Unlock()
|
|
mc.actualStore.Shutdown()
|
|
}
|