mirror of
https://github.com/seaweedfs/seaweedfs.git
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122 lines
3.6 KiB
Go
122 lines
3.6 KiB
Go
package remote_storage
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import (
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"fmt"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/pb/remote_pb"
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"io"
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"strings"
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"sync"
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)
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func ParseLocationName(remote string) (locationName string) {
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if strings.HasSuffix(string(remote), "/") {
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remote = remote[:len(remote)-1]
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}
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parts := strings.SplitN(string(remote), "/", 2)
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if len(parts) >= 1 {
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return parts[0]
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}
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return
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}
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func parseBucketLocation(remote string) (loc *remote_pb.RemoteStorageLocation) {
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loc = &remote_pb.RemoteStorageLocation{}
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if strings.HasSuffix(string(remote), "/") {
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remote = remote[:len(remote)-1]
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}
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parts := strings.SplitN(string(remote), "/", 3)
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if len(parts) >= 1 {
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loc.Name = parts[0]
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}
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if len(parts) >= 2 {
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loc.Bucket = parts[1]
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}
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loc.Path = string(remote[len(loc.Name)+1+len(loc.Bucket):])
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if loc.Path == "" {
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loc.Path = "/"
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}
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return
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}
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func parseNoBucketLocation(remote string) (loc *remote_pb.RemoteStorageLocation) {
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loc = &remote_pb.RemoteStorageLocation{}
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if strings.HasSuffix(string(remote), "/") {
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remote = remote[:len(remote)-1]
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}
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parts := strings.SplitN(string(remote), "/", 2)
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if len(parts) >= 1 {
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loc.Name = parts[0]
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}
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loc.Path = string(remote[len(loc.Name):])
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if loc.Path == "" {
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loc.Path = "/"
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}
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return
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}
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func FormatLocation(loc *remote_pb.RemoteStorageLocation) string {
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return fmt.Sprintf("%s/%s%s", loc.Name, loc.Bucket, loc.Path)
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}
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type VisitFunc func(dir string, name string, isDirectory bool, remoteEntry *filer_pb.RemoteEntry) error
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type RemoteStorageClient interface {
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Traverse(loc *remote_pb.RemoteStorageLocation, visitFn VisitFunc) error
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ReadFile(loc *remote_pb.RemoteStorageLocation, offset int64, size int64) (data []byte, err error)
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WriteDirectory(loc *remote_pb.RemoteStorageLocation, entry *filer_pb.Entry) (err error)
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WriteFile(loc *remote_pb.RemoteStorageLocation, entry *filer_pb.Entry, reader io.Reader) (remoteEntry *filer_pb.RemoteEntry, err error)
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UpdateFileMetadata(loc *remote_pb.RemoteStorageLocation, oldEntry *filer_pb.Entry, newEntry *filer_pb.Entry) (err error)
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DeleteFile(loc *remote_pb.RemoteStorageLocation) (err error)
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}
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type RemoteStorageClientMaker interface {
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Make(remoteConf *remote_pb.RemoteConf) (RemoteStorageClient, error)
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HasBucket() bool
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}
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var (
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RemoteStorageClientMakers = make(map[string]RemoteStorageClientMaker)
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remoteStorageClients = make(map[string]RemoteStorageClient)
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remoteStorageClientsLock sync.Mutex
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)
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func ParseRemoteLocation(remoteConfType string, remote string) (remoteStorageLocation *remote_pb.RemoteStorageLocation, err error) {
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maker, found := RemoteStorageClientMakers[remoteConfType]
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if !found {
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return nil, fmt.Errorf("remote storage type %s not found", remoteConfType)
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}
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if !maker.HasBucket() {
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return parseNoBucketLocation(remote), nil
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}
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return parseBucketLocation(remote), nil
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}
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func makeRemoteStorageClient(remoteConf *remote_pb.RemoteConf) (RemoteStorageClient, error) {
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maker, found := RemoteStorageClientMakers[remoteConf.Type]
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if !found {
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return nil, fmt.Errorf("remote storage type %s not found", remoteConf.Type)
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}
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return maker.Make(remoteConf)
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}
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func GetRemoteStorage(remoteConf *remote_pb.RemoteConf) (RemoteStorageClient, error) {
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remoteStorageClientsLock.Lock()
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defer remoteStorageClientsLock.Unlock()
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existingRemoteStorageClient, found := remoteStorageClients[remoteConf.Name]
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if found {
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return existingRemoteStorageClient, nil
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}
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newRemoteStorageClient, err := makeRemoteStorageClient(remoteConf)
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if err != nil {
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return nil, fmt.Errorf("make remote storage client %s: %v", remoteConf.Name, err)
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}
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remoteStorageClients[remoteConf.Name] = newRemoteStorageClient
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return newRemoteStorageClient, nil
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}
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