/
batch.go
277 lines (252 loc) · 6.79 KB
/
batch.go
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package s3box
import (
"fmt"
"github.com/aws/aws-sdk-go/aws"
"github.com/aws/aws-sdk-go/service/s3"
"strings"
"sync"
"sync/atomic"
"time"
)
// TODO modify print of result and error
type BucketCleaner struct {
svc *s3.S3
deletedCount uint64
}
func NewBucketCleaner(svc *s3.S3) *BucketCleaner {
c := &BucketCleaner{
svc: svc,
deletedCount: 0,
}
return c
}
// EmptyBucket is to empty objects in the bucket concurrently.
// objChanCap is the capacity of channel to store the objects from listObjs
// multiDel decides whether to delete multiple objects in a request
func (c *BucketCleaner) EmptyBucket(bucketName string, deleteWorkerNum, objChanCap int, multiDel, deleteBucket bool) error {
var wg sync.WaitGroup
wg.Add(deleteWorkerNum + 2)
startTime := time.Now()
go c.crontabPrintResults(startTime)
// objChannel存放实际的对象名
objChannel := make(chan s3.ObjectIdentifier, objChanCap)
// listObjs并将对象名放入objChannel
go func() {
defer wg.Done()
c.listObjs(objChannel, bucketName)
}()
go func() {
defer wg.Done()
c.abortAllMultiparts(bucketName)
}()
// 并发删除对象
for i := 0; i < deleteWorkerNum; i++ {
if multiDel {
go func() {
defer wg.Done()
c.deleteObjs(objChannel, bucketName)
}()
} else {
go func() {
defer wg.Done()
c.deleteObj(objChannel, bucketName)
}()
}
}
wg.Wait()
fmt.Println("all task completed")
if deleteBucket {
deleteBucketInput := &s3.DeleteBucketInput{
Bucket: aws.String(bucketName),
}
_, err := c.svc.DeleteBucket(deleteBucketInput)
if err != nil {
fmt.Printf("delete bucket err:%s\n", err)
return err
}
fmt.Printf("deleted bucket:%s\n", bucketName)
}
return nil
}
// DeleteAllBuckets delete all buckets or all buckets contain a specified string of a user
func (c *BucketCleaner) DeleteAllBuckets(containedStr string) error {
listBucketsInput := &s3.ListBucketsInput{}
listBucketsOutput, err := c.svc.ListBuckets(listBucketsInput)
if err != nil {
return err
}
for _, b := range listBucketsOutput.Buckets {
bktName := *b.Name
if containedStr == "" || strings.Contains(bktName, containedStr) {
c.EmptyBucket(bktName, 3, 1000, true, true)
}
}
return nil
}
func (c *BucketCleaner) crontabPrintResults(startTime time.Time) {
timeTicker := time.NewTicker(time.Duration(1) * time.Second)
defer timeTicker.Stop()
tps := 0.0
for {
<-timeTicker.C
timeDiff := time.Since(startTime)
tps = float64(c.deletedCount) / timeDiff.Seconds()
fmt.Printf("TPS:%f\n", tps)
if c.deletedCount > 0 && c.deletedCount%10000 == 0 {
fmt.Printf("deleted %d objects\n", c.deletedCount)
}
}
}
func (c *BucketCleaner) deleteObjs(objChannel chan s3.ObjectIdentifier, bucketName string) {
maxDelNum := 1000
objs := make([]*s3.ObjectIdentifier, 0, maxDelNum)
for {
select {
case obj, ok := <-objChannel:
if !ok {
// If there are any undeleted objects, delete them first and then exit
if len(objs) > 0 {
c.doDeleteObjsReq(objs, bucketName)
}
return
}
objId := s3.ObjectIdentifier{
Key: obj.Key,
VersionId: obj.VersionId,
}
objs = append(objs, &objId)
if len(objs) < maxDelNum {
continue
}
c.doDeleteObjsReq(objs, bucketName)
objs = objs[0:0]
default:
// If no data is available in the channel, delete the objects directly and continue the next loop
if len(objs) > 0 {
c.doDeleteObjsReq(objs, bucketName)
objs = objs[0:0]
}
}
}
}
func (c *BucketCleaner) doDeleteObjsReq(objs []*s3.ObjectIdentifier, bucketName string) {
deleteObjectsInput := &s3.DeleteObjectsInput{
Bucket: aws.String(bucketName),
Delete: &s3.Delete{
Objects: objs,
Quiet: aws.Bool(true),
},
}
_, err := c.svc.DeleteObjects(deleteObjectsInput)
if err != nil {
fmt.Printf("Failed to delete objects. %v\n", err)
} else {
atomic.AddUint64(&c.deletedCount, 1)
}
}
func (c *BucketCleaner) deleteObj(objChannel chan s3.ObjectIdentifier, bucketName string) {
for {
select {
case obj, ok := <-objChannel:
if !ok {
return
}
deleteObjectInput := &s3.DeleteObjectInput{
Bucket: aws.String(bucketName),
Key: obj.Key,
VersionId: obj.VersionId,
}
_, err := c.svc.DeleteObject(deleteObjectInput)
if err != nil {
fmt.Printf("Failed to delete object. %v\n", err)
} else {
atomic.AddUint64(&c.deletedCount, 1)
}
}
}
}
func (c *BucketCleaner) abortAllMultiparts(bucketName string) {
var maxUploads int64
maxUploads = 1000
input := &s3.ListMultipartUploadsInput{
Bucket: aws.String(bucketName),
MaxUploads: &maxUploads,
}
allUploads, err := c.svc.ListMultipartUploads(input)
if err != nil {
fmt.Printf("fail to list multipart uploads. %v\n", err)
return
}
listedCount := 0
for {
if len(allUploads.Uploads) > 0 {
listedCount += len(allUploads.Uploads)
fmt.Printf("got %d objects of bucket %v\n", listedCount, bucketName)
for _, upload := range allUploads.Uploads {
abortInput := &s3.AbortMultipartUploadInput{
Bucket: &bucketName,
Key: upload.Key,
UploadId: upload.UploadId,
}
_, err = c.svc.AbortMultipartUpload(abortInput)
if err != nil {
fmt.Printf("fail to AbortMultipartUpload. %v\n", err)
}
}
input.KeyMarker = allUploads.NextKeyMarker
allUploads, err = c.svc.ListMultipartUploads(input)
if err != nil {
fmt.Printf("fail to list multipart uploads. %v\n", err)
}
} else {
break
}
}
}
func (c *BucketCleaner) listObjs(objChannel chan s3.ObjectIdentifier, bucketName string) {
fmt.Printf("listing buckets %v\n", bucketName)
defer close(objChannel)
input := &s3.ListObjectVersionsInput{
Bucket: aws.String(bucketName),
//KeyMarker: aws.String(""),
}
output, err := c.svc.ListObjectVersions(input)
if err != nil {
fmt.Printf("fail to list object versions of bucket. %v\n", err)
return
}
listedCount := 0
for {
if len(output.Versions) > 0 {
listedCount += len(output.Versions)
fmt.Printf("got %d objects of bucket %v\n", listedCount, bucketName)
for _, object := range output.Versions {
objChannel <- s3.ObjectIdentifier{
Key: object.Key,
VersionId: object.VersionId,
}
}
input.KeyMarker = output.NextKeyMarker
output, err = c.svc.ListObjectVersions(input)
if err != nil {
fmt.Printf("fail to list objects of bucket. %v\n", err)
}
} else if len(output.DeleteMarkers) > 0 {
listedCount += len(output.DeleteMarkers)
fmt.Printf("got %d objects of bucket %v\n", listedCount, bucketName)
for _, object := range output.DeleteMarkers {
objChannel <- s3.ObjectIdentifier{
Key: object.Key,
VersionId: object.VersionId,
}
}
input.KeyMarker = output.NextKeyMarker
output, err = c.svc.ListObjectVersions(input)
if err != nil {
fmt.Printf("fail to list objects of bucket. %v\n", err)
}
} else {
break
}
}
}