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slot.go
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slot.go
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// Copyright 2014 Wandoujia Inc. All Rights Reserved.
// Licensed under the MIT (MIT-LICENSE.txt) license.
package main
import (
"encoding/json"
"fmt"
"strconv"
"time"
"github.com/juju/errors"
"github.com/wandoulabs/codis/pkg/models"
"github.com/docopt/docopt-go"
log "github.com/ngaut/logging"
"github.com/nu7hatch/gouuid"
)
func cmdSlot(argv []string) (err error) {
usage := `usage:
cconfig slot init
cconfig slot info <slot_id>
cconfig slot set <slot_id> <group_id> <status>
cconfig slot range-set <slot_from> <slot_to> <group_id> <status>
cconfig slot migrate <slot_from> <slot_to> <group_id> [--delay=<delay_time_in_ms>]
cconfig slot rebalance [--delay=<delay_time_in_ms>]
options:
TODO
`
args, err := docopt.Parse(usage, argv, true, "", false)
if err != nil {
log.Error(err)
return errors.Trace(err)
}
log.Debug(args)
// no need to lock here
// locked in runmigratetask
if args["migrate"].(bool) {
delay := 0
groupId, err := strconv.Atoi(args["<group_id>"].(string))
if args["--delay"] != nil {
delay, err = strconv.Atoi(args["--delay"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
}
slotFrom, err := strconv.Atoi(args["<slot_from>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
slotTo, err := strconv.Atoi(args["<slot_to>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
return runSlotMigrate(slotFrom, slotTo, groupId, delay)
}
if args["rebalance"].(bool) {
delay := 0
if args["--delay"] != nil {
delay, err = strconv.Atoi(args["--delay"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
}
return runRebalance(delay)
}
zkLock.Lock(fmt.Sprintf("slot, %+v", argv))
defer func() {
err := zkLock.Unlock()
if err != nil {
log.Error(err)
}
}()
if args["init"].(bool) {
return runSlotInit()
}
if args["info"].(bool) {
slotId, err := strconv.Atoi(args["<slot_id>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
return runSlotInfo(slotId)
}
groupId, err := strconv.Atoi(args["<group_id>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
if args["set"].(bool) {
slotId, err := strconv.Atoi(args["<slot_id>"].(string))
status := args["<status>"].(string)
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
return runSlotSet(slotId, groupId, status)
}
if args["range-set"].(bool) {
status := args["<status>"].(string)
slotFrom, err := strconv.Atoi(args["<slot_from>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
slotTo, err := strconv.Atoi(args["<slot_to>"].(string))
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
return runSlotRangeSet(slotFrom, slotTo, groupId, status)
}
return nil
}
func runSlotInit() error {
err := models.InitSlotSet(zkConn, productName, models.DEFAULT_SLOT_NUM)
if err != nil {
return errors.Trace(err)
}
return nil
}
func runSlotInfo(slotId int) error {
s, err := models.GetSlot(zkConn, productName, slotId)
if err != nil {
return errors.Trace(err)
}
b, _ := json.MarshalIndent(s, " ", " ")
fmt.Println(string(b))
return nil
}
func runSlotRangeSet(fromSlotId, toSlotId int, groupId int, status string) error {
err := models.SetSlotRange(zkConn, productName, fromSlotId, toSlotId, groupId, models.SlotStatus(status))
if err != nil {
return errors.Trace(err)
}
return nil
}
func runSlotSet(slotId int, groupId int, status string) error {
slot := models.NewSlot(productName, slotId)
slot.GroupId = groupId
slot.State.Status = models.SlotStatus(status)
ts := time.Now().Unix()
slot.State.LastOpTs = strconv.FormatInt(ts, 10)
if err := slot.Update(zkConn); err != nil {
return errors.Trace(err)
}
return nil
}
func runSlotMigrate(fromSlotId, toSlotId int, newGroupId int, delay int) error {
t := &MigrateTask{}
t.Delay = delay
t.FromSlot = fromSlotId
t.ToSlot = toSlotId
t.NewGroupId = newGroupId
t.Status = "migrating"
t.CreateAt = strconv.FormatInt(time.Now().Unix(), 10)
u, err := uuid.NewV4()
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
t.Id = u.String()
t.stopChan = make(chan struct{})
// run migrate
if ok, err := preMigrateCheck(t); ok {
err = RunMigrateTask(t)
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
} else {
log.Warning(err)
return errors.Trace(err)
}
return nil
}
func runRebalance(delay int) error {
err := Rebalance(zkConn, delay)
if err != nil {
log.Warning(err)
return errors.Trace(err)
}
return nil
}