From 44647a46c0dc82350cc994da0784f3c3936270d6 Mon Sep 17 00:00:00 2001
From: Chris Lu <chris.lu@uber.com>
Date: Sun, 17 Mar 2019 23:28:43 -0700
Subject: [PATCH] needle scanner read appendAtNs

---
 unmaintained/see_dat/see_dat.go   | 6 ++++--
 weed/storage/needle_read_write.go | 6 ++++++
 2 files changed, 10 insertions(+), 2 deletions(-)

diff --git a/unmaintained/see_dat/see_dat.go b/unmaintained/see_dat/see_dat.go
index f79c0a6a9..28d6447d6 100644
--- a/unmaintained/see_dat/see_dat.go
+++ b/unmaintained/see_dat/see_dat.go
@@ -4,6 +4,7 @@ import (
 	"flag"
 	"github.com/chrislusf/seaweedfs/weed/glog"
 	"github.com/chrislusf/seaweedfs/weed/storage"
+	"time"
 )
 
 var (
@@ -22,11 +23,12 @@ func (scanner *VolumeFileScanner4SeeDat) VisitSuperBlock(superBlock storage.Supe
 
 }
 func (scanner *VolumeFileScanner4SeeDat) ReadNeedleBody() bool {
-	return false
+	return true
 }
 
 func (scanner *VolumeFileScanner4SeeDat) VisitNeedle(n *storage.Needle, offset int64) error {
-	glog.V(0).Infof("%d,%s%x offset %d size %d cookie %x", *volumeId, n.Id, n.Cookie, offset, n.Size, n.Cookie)
+	t := time.Unix(int64(n.AppendAtNs)/int64(time.Second), int64(n.AppendAtNs)%int64(time.Second))
+	glog.V(0).Infof("%d,%s%x offset %d size %d cookie %x appendedAt %v", *volumeId, n.Id, n.Cookie, offset, n.Size, n.Cookie, t)
 	return nil
 }
 
diff --git a/weed/storage/needle_read_write.go b/weed/storage/needle_read_write.go
index c99395f8b..e69d70dc3 100644
--- a/weed/storage/needle_read_write.go
+++ b/weed/storage/needle_read_write.go
@@ -283,6 +283,7 @@ func NeedleBodyLength(needleSize uint32, version Version) int64 {
 //n should be a needle already read the header
 //the input stream will read until next file entry
 func (n *Needle) ReadNeedleBody(r *os.File, version Version, offset int64, bodyLength int64) (err error) {
+
 	if bodyLength <= 0 {
 		return nil
 	}
@@ -301,6 +302,11 @@ func (n *Needle) ReadNeedleBody(r *os.File, version Version, offset int64, bodyL
 		}
 		n.readNeedleDataVersion2(bytes[0:n.Size])
 		n.Checksum = NewCRC(n.Data)
+
+		if version == Version3 {
+			tsOffset := n.Size+NeedleChecksumSize
+			n.AppendAtNs = util.BytesToUint64(bytes[tsOffset : tsOffset+TimestampSize])
+		}
 	default:
 		err = fmt.Errorf("Unsupported Version! (%d)", version)
 	}