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migrate.go
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migrate.go
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// +-------------------------------------------------------------------------
// | Copyright (C) 2016 Yunify, Inc.
// +-------------------------------------------------------------------------
// | Licensed under the Apache License, Version 2.0 (the "License");
// | you may not use this work except in compliance with the License.
// | You may obtain a copy of the License in the LICENSE file, or at:
// |
// | http://www.apache.org/licenses/LICENSE-2.0
// |
// | Unless required by applicable law or agreed to in writing, software
// | distributed under the License is distributed on an "AS IS" BASIS,
// | WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// | See the License for the specific language governing permissions and
// | limitations under the License.
// +-------------------------------------------------------------------------
package migrate
import (
"context"
"sync"
"github.com/cenkalti/backoff"
"github.com/sirupsen/logrus"
"github.com/yunify/qscamel/constants"
"github.com/yunify/qscamel/endpoint"
"github.com/yunify/qscamel/endpoint/aliyun"
"github.com/yunify/qscamel/endpoint/filelist"
"github.com/yunify/qscamel/endpoint/fs"
"github.com/yunify/qscamel/endpoint/gcs"
"github.com/yunify/qscamel/endpoint/qingstor"
"github.com/yunify/qscamel/endpoint/qiniu"
"github.com/yunify/qscamel/endpoint/s3"
"github.com/yunify/qscamel/endpoint/upyun"
"github.com/yunify/qscamel/model"
"github.com/yunify/qscamel/utils"
)
var (
t *model.Task
oc chan *model.Object
jc chan *model.Job
owg *sync.WaitGroup
jwg *sync.WaitGroup
src endpoint.Source
dst endpoint.Destination
)
// Execute will execute migrate task.
func Execute(ctx context.Context) (err error) {
t, err = model.GetTask(ctx)
if err != nil {
return
}
err = check(ctx)
if err != nil {
logrus.Errorf("Pre migrate check failed for %v.", err)
return
}
return run(ctx)
}
func check(ctx context.Context) (err error) {
// Initialize source.
switch t.Src.Type {
case constants.EndpointAliyun:
src, err = aliyun.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointFileList:
src, err = filelist.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointFs:
src, err = fs.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointGCS:
src, err = gcs.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointQingStor:
src, err = qingstor.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointQiniu:
src, err = qiniu.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointS3:
src, err = s3.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
case constants.EndpointUpyun:
src, err = upyun.New(ctx, constants.SourceEndpoint)
if err != nil {
return
}
default:
logrus.Errorf("Type %s is not supported.", t.Src.Type)
err = constants.ErrEndpointNotSupported
return
}
// Initialize destination.
switch t.Dst.Type {
case constants.EndpointQingStor:
dst, err = qingstor.New(ctx, constants.DestinationEndpoint)
if err != nil {
return
}
case constants.EndpointFs:
dst, err = fs.New(ctx, constants.DestinationEndpoint)
if err != nil {
return
}
default:
logrus.Errorf("Type %s is not supported.", t.Src.Type)
err = constants.ErrEndpointNotSupported
return
}
return
}
// run will execute task.
func run(ctx context.Context) (err error) {
// Check if task has been finished.
if t.Status == constants.TaskStatusFinished {
logrus.Infof("Task %s has been finished, skip.", t.Name)
return
}
switch t.Type {
case constants.TaskTypeCopy:
t.Handle = copyObject
err = copyTask(ctx)
if err != nil {
return
}
case constants.TaskTypeDelete:
t.Handle = deleteObject
err = deleteTask(ctx)
if err != nil {
return
}
case constants.TaskTypeFetch:
t.Handle = fetchObject
err = fetchTask(ctx)
if err != nil {
return
}
default:
logrus.Errorf("Task %s's type %s is not supported.", t.Name, t.Type)
return
}
// Update task status.
t.Status = constants.TaskStatusFinished
err = t.Save(ctx)
if err != nil {
logrus.Errorf("Task %s save failed for %v.", t.Name, err)
return
}
logrus.Infof("Task %s has been finished.", t.Name)
return
}
// migrateWorker will only do migrate work.
func migrateWorker(ctx context.Context) {
defer owg.Done()
defer utils.Recover()
for o := range oc {
ok, err := checkObject(ctx, o)
if err != nil {
logrus.Errorf("Check object failed for %v.", err)
continue
}
if ok {
err = model.DeleteObject(ctx, o.Key)
if err != nil {
logrus.Errorf("Delete object failed for %v.", err)
}
continue
}
logrus.Infof("Start %sing object %s.", t.Type, o.Key)
bo := backoff.NewExponentialBackOff()
err = backoff.Retry(func() error {
err = t.Handle(ctx, o)
if err == nil {
return nil
}
logrus.Infof("Object %s %s failed, retrying.", o.Key, t.Type)
return err
}, bo)
if err != nil {
logrus.Errorf("%s object failed for %v.", t.Type, err)
continue
}
err = model.DeleteObject(ctx, o.Key)
if err != nil {
logrus.Errorf("Delete object failed for %v.", err)
continue
}
logrus.Infof("Object %s %sed.", o.Key, t.Type)
}
}
// isFinished will check whether current task has been finished.
func isFinished(ctx context.Context) bool {
ho, err := model.HasObject(ctx)
if err != nil {
logrus.Panic(err)
}
if ho {
logrus.Infof("There are not finished objects.")
return false
}
hj, err := model.HasJob(ctx)
if err != nil {
logrus.Panic(err)
}
if hj {
logrus.Infof("There are not finished jobs.")
return false
}
return true
}