volume stream read skips deleted content

weed/storage/volume_read_all.go

@@ -0,0 +1,42 @@
+package storage
+
+import (
+	"github.com/chrislusf/seaweedfs/weed/pb/volume_server_pb"
+	"github.com/chrislusf/seaweedfs/weed/storage/needle"
+	"github.com/chrislusf/seaweedfs/weed/storage/super_block"
+)
+
+type VolumeFileScanner4ReadAll struct {
+	Stream volume_server_pb.VolumeServer_ReadAllNeedlesServer
+	V      *Volume
+}
+
+func (scanner *VolumeFileScanner4ReadAll) VisitSuperBlock(superBlock super_block.SuperBlock) error {
+	return nil
+
+}
+func (scanner *VolumeFileScanner4ReadAll) ReadNeedleBody() bool {
+	return true
+}
+
+func (scanner *VolumeFileScanner4ReadAll) VisitNeedle(n *needle.Needle, offset int64, needleHeader, needleBody []byte) error {
+
+	nv, ok := scanner.V.nm.Get(n.Id)
+	if !ok {
+		return nil
+	}
+	if nv.Offset.ToActualOffset() != offset {
+		return nil
+	}
+
+	sendErr := scanner.Stream.Send(&volume_server_pb.ReadAllNeedlesResponse{
+		VolumeId:   uint32(scanner.V.Id),
+		NeedleId:   uint64(n.Id),
+		Cookie:     uint32(n.Cookie),
+		NeedleBlob: n.Data,
+	})
+	if sendErr != nil {
+		return sendErr
+	}
+	return nil
+}