add WIP filer.replicate

weed/replication/sink/filer_sink.go

@@ -0,0 +1,163 @@
+package sink
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/util"
+	"github.com/chrislusf/seaweedfs/weed/pb/filer_pb"
+	"fmt"
+	"strings"
+	"github.com/chrislusf/seaweedfs/weed/filer2"
+	"github.com/chrislusf/seaweedfs/weed/glog"
+	"context"
+	"sync"
+)
+
+type ReplicationSink interface {
+	DeleteEntry(entry *filer_pb.Entry, deleteIncludeChunks bool) error
+	CreateEntry(entry *filer_pb.Entry) error
+	UpdateEntry(oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) error
+}
+
+type FilerSink struct {
+	grpcAddress string
+	id          string
+	dir         string
+}
+
+func (fs *FilerSink) Initialize(configuration util.Configuration) error {
+	return fs.initialize(
+		configuration.GetString("grpcAddress"),
+		configuration.GetString("id"),
+		configuration.GetString("directory"),
+	)
+}
+
+func (fs *FilerSink) initialize(grpcAddress string, id string, dir string) (err error) {
+	fs.grpcAddress = grpcAddress
+	fs.id = id
+	fs.dir = dir
+	return nil
+}
+
+func (fs *FilerSink) DeleteEntry(entry *filer_pb.Entry, deleteIncludeChunks bool) error {
+	return fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		dir, name := filer2.FullPath(entry.Name).DirAndName()
+
+		request := &filer_pb.DeleteEntryRequest{
+			Directory:    dir,
+			Name:         name,
+			IsDirectory:  entry.IsDirectory,
+			IsDeleteData: deleteIncludeChunks,
+		}
+
+		glog.V(1).Infof("delete entry: %v", request)
+		_, err := client.DeleteEntry(context.Background(), request)
+		if err != nil {
+			glog.V(0).Infof("delete entry %s: %v", entry.Name, err)
+			return fmt.Errorf("delete entry %s: %v", entry.Name, err)
+		}
+
+		return nil
+	})
+}
+
+func (fs *FilerSink) CreateEntry(entry *filer_pb.Entry) error {
+
+	replicatedChunks, err := replicateChunks(entry.Chunks)
+
+	if err != nil {
+		glog.V(0).Infof("replicate entry chunks %s: %v", entry.Name, err)
+		return fmt.Errorf("replicate entry chunks %s: %v", entry.Name, err)
+	}
+
+	return fs.withFilerClient(func(client filer_pb.SeaweedFilerClient) error {
+
+		dir, name := filer2.FullPath(entry.Name).DirAndName()
+
+		request := &filer_pb.CreateEntryRequest{
+			Directory: dir,
+			Entry: &filer_pb.Entry{
+				Name:        name,
+				IsDirectory: entry.IsDirectory,
+				Attributes:  entry.Attributes,
+				Chunks:      replicatedChunks,
+			},
+		}
+
+		glog.V(1).Infof("create: %v", request)
+		if _, err := client.CreateEntry(context.Background(), request); err != nil {
+			glog.V(0).Infof("create entry %s: %v", entry.Name, err)
+			return fmt.Errorf("create entry %s: %v", entry.Name, err)
+		}
+
+		return nil
+	})
+}
+
+func (fs *FilerSink) UpdateEntry(oldEntry, newEntry *filer_pb.Entry, deleteIncludeChunks bool) error {
+	return nil
+}
+
+func (fs *FilerSink) withFilerClient(fn func(filer_pb.SeaweedFilerClient) error) error {
+
+	grpcConnection, err := util.GrpcDial(fs.grpcAddress)
+	if err != nil {
+		return fmt.Errorf("fail to dial %s: %v", fs.grpcAddress, err)
+	}
+	defer grpcConnection.Close()
+
+	client := filer_pb.NewSeaweedFilerClient(grpcConnection)
+
+	return fn(client)
+}
+
+func volumeId(fileId string) string {
+	lastCommaIndex := strings.LastIndex(fileId, ",")
+	if lastCommaIndex > 0 {
+		return fileId[:lastCommaIndex]
+	}
+	return fileId
+}
+
+func replicateChunks(sourceChunks []*filer_pb.FileChunk) (replicatedChunks []*filer_pb.FileChunk, err error) {
+	if len(sourceChunks) == 0 {
+		return
+	}
+	var wg sync.WaitGroup
+	for _, s := range sourceChunks {
+		wg.Add(1)
+		go func(chunk *filer_pb.FileChunk) {
+			defer wg.Done()
+			replicatedChunk, e := replicateOneChunk(chunk)
+			if e != nil {
+				err = e
+			}
+			replicatedChunks = append(replicatedChunks, replicatedChunk)
+		}(s)
+	}
+	wg.Wait()
+
+	return
+}
+
+func replicateOneChunk(sourceChunk *filer_pb.FileChunk) (*filer_pb.FileChunk, error) {
+
+	fileId, err := fetchAndWrite(sourceChunk)
+	if err != nil {
+		return nil, fmt.Errorf("copy %s: %v", sourceChunk.FileId, err)
+	}
+
+	return &filer_pb.FileChunk{
+		FileId:       fileId,
+		Offset:       sourceChunk.Offset,
+		Size:         sourceChunk.Size,
+		Mtime:        sourceChunk.Mtime,
+		ETag:         sourceChunk.ETag,
+		SourceFileId: sourceChunk.FileId,
+	}, nil
+}
+
+func fetchAndWrite(sourceChunk *filer_pb.FileChunk) (fileId string, err error) {
+
+	return
+}