From 8d75b20617184c0eb107a4a1c88434d37b4e30a4 Mon Sep 17 00:00:00 2001
From: Josh Baker <joshbaker77@gmail.com>
Date: Wed, 30 Mar 2016 14:53:29 -0700
Subject: [PATCH] aof migration

---
 controller/aofmigrate.go | 52 +++++++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 6 deletions(-)

diff --git a/controller/aofmigrate.go b/controller/aofmigrate.go
index 10d3b60c..f8fc7d8f 100644
--- a/controller/aofmigrate.go
+++ b/controller/aofmigrate.go
@@ -1,11 +1,16 @@
 package controller
 
 import (
+	"bufio"
 	"encoding/binary"
 	"errors"
 	"io"
 	"os"
 	"path"
+	"time"
+
+	"github.com/tidwall/resp"
+	"github.com/tidwall/tile38/controller/log"
 )
 
 var errCorruptedAOF = errors.New("corrupted aof file")
@@ -90,7 +95,7 @@ func (c *Controller) migrateAOF() error {
 		}
 		return err
 	}
-
+	log.Warn("Migrating aof to new format")
 	newf, err := os.Create(path.Join(c.dir, "migrate.aof"))
 	if err != nil {
 		return err
@@ -102,18 +107,53 @@ func (c *Controller) migrateAOF() error {
 		return err
 	}
 	defer oldf.Close()
-
-	rd := NewLegacyAOFReader(newf)
+	start := time.Now()
+	count := 0
+	wr := bufio.NewWriter(newf)
+	rd := NewLegacyAOFReader(oldf)
 	for {
-		cmd, err := rd.ReadCommand()
+		cmdb, err := rd.ReadCommand()
 		if err != nil {
 			if err == io.EOF {
 				break
 			}
 			return err
 		}
-		println(string(cmd))
+		line := string(cmdb)
+		var tok string
+		values := make([]resp.Value, 0, 64)
+		for line != "" {
+			line, tok = token(line)
+			if len(tok) > 0 && tok[0] == '{' {
+				if line != "" {
+					tok = tok + " " + line
+					line = ""
+				}
+			}
+			values = append(values, resp.StringValue(tok))
+		}
+		data, err := resp.ArrayValue(values).MarshalRESP()
+		if err != nil {
+			return err
+		}
+		if _, err := wr.Write(data); err != nil {
+			return err
+		}
+		if wr.Buffered() > 1024*1024 {
+			if err := wr.Flush(); err != nil {
+				return err
+			}
+		}
+		count++
+	}
+	if err := wr.Flush(); err != nil {
+		return err
+	}
+	oldf.Close()
+	newf.Close()
+	log.Debugf("%d items: %.0f/sec", count, float64(count)/(float64(time.Now().Sub(start))/float64(time.Second)))
+	if err := os.Rename(path.Join(c.dir, "migrate.aof"), path.Join(c.dir, "appendonly.aof")); err != nil {
+		return err
 	}
-	return errors.New("unsupported")
 	return nil
 }