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126 lines
3 KiB
Go
126 lines
3 KiB
Go
package gcssink
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import (
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"context"
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"fmt"
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"os"
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"cloud.google.com/go/storage"
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"google.golang.org/api/option"
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"github.com/chrislusf/seaweedfs/weed/filer"
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"github.com/chrislusf/seaweedfs/weed/glog"
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"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
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"github.com/chrislusf/seaweedfs/weed/replication/sink"
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"github.com/chrislusf/seaweedfs/weed/replication/source"
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"github.com/chrislusf/seaweedfs/weed/util"
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)
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type GcsSink struct {
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client *storage.Client
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bucket string
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dir string
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filerSource *source.FilerSource
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}
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func init() {
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sink.Sinks = append(sink.Sinks, &GcsSink{})
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}
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func (g *GcsSink) GetName() string {
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return "google_cloud_storage"
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}
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func (g *GcsSink) GetSinkToDirectory() string {
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return g.dir
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}
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func (g *GcsSink) Initialize(configuration util.Configuration, prefix string) error {
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return g.initialize(
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configuration.GetString(prefix+"google_application_credentials"),
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configuration.GetString(prefix+"bucket"),
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configuration.GetString(prefix+"directory"),
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)
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}
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func (g *GcsSink) SetSourceFiler(s *source.FilerSource) {
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g.filerSource = s
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}
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func (g *GcsSink) initialize(google_application_credentials, bucketName, dir string) error {
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g.bucket = bucketName
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g.dir = dir
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// Creates a client.
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if google_application_credentials == "" {
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var found bool
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google_application_credentials, found = os.LookupEnv("GOOGLE_APPLICATION_CREDENTIALS")
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if !found {
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glog.Fatalf("need to specific GOOGLE_APPLICATION_CREDENTIALS env variable or google_application_credentials in replication.toml")
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}
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}
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client, err := storage.NewClient(context.Background(), option.WithCredentialsFile(google_application_credentials))
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if err != nil {
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glog.Fatalf("Failed to create client: %v", err)
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}
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g.client = client
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return nil
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}
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func (g *GcsSink) DeleteEntry(key string, isDirectory, deleteIncludeChunks bool, signatures []int32) error {
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if isDirectory {
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key = key + "/"
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}
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if err := g.client.Bucket(g.bucket).Object(key).Delete(context.Background()); err != nil {
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return fmt.Errorf("gcs delete %s%s: %v", g.bucket, key, err)
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}
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return nil
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}
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func (g *GcsSink) CreateEntry(key string, entry *filer_pb.Entry, signatures []int32) error {
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if entry.IsDirectory {
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return nil
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}
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totalSize := filer.FileSize(entry)
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chunkViews := filer.ViewFromChunks(g.filerSource.LookupFileId, entry.Chunks, 0, int64(totalSize))
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wc := g.client.Bucket(g.bucket).Object(key).NewWriter(context.Background())
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for _, chunk := range chunkViews {
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fileUrl, err := g.filerSource.LookupFileId(chunk.FileId)
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if err != nil {
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return err
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}
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err = util.ReadUrlAsStream(fileUrl+"?readDeleted=true", nil, false, chunk.IsFullChunk(), chunk.Offset, int(chunk.Size), func(data []byte) {
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wc.Write(data)
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})
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if err != nil {
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return err
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}
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}
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if err := wc.Close(); err != nil {
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return err
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}
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return nil
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}
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func (g *GcsSink) UpdateEntry(key string, oldEntry *filer_pb.Entry, newParentPath string, newEntry *filer_pb.Entry, deleteIncludeChunks bool, signatures []int32) (foundExistingEntry bool, err error) {
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// TODO improve efficiency
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return false, nil
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}
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