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