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Have number of connections limited by channel

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Removes previous limit of 1 connection
This commit is contained in:
Chris Howey 2015-06-14 07:17:38 -05:00
parent 2350419f59
commit aaae7f33d3
1 changed files with 16 additions and 9 deletions
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25
backend/s3/s3.go
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@ -5,7 +5,6 @@ import (
"errors"
"io"
"strings"
"sync"
"github.com/mitchellh/goamz/aws"
"github.com/mitchellh/goamz/s3"
@ -14,6 +13,7 @@ import (
)
const maxKeysInList = 1000
const connLimit = 10
func s3path(t backend.Type, name string) string {
if t == backend.Config {
@ -23,18 +23,23 @@ func s3path(t backend.Type, name string) string {
}
type S3 struct {
bucket *s3.Bucket
mput sync.Mutex
path string
bucket *s3.Bucket
connChan chan struct{}
path string
}
// Open a backend using an S3 bucket object
func OpenS3Bucket(bucket *s3.Bucket, bucketname string) *S3 {
return &S3{bucket: bucket, path: bucketname}
connChan := make(chan struct{}, connLimit)
for i := 0; i < connLimit; i++ {
connChan <- struct{}{}
}
return &S3{bucket: bucket, path: bucketname, connChan: connChan}
}
// Open opens the s3 backend at bucket and region.
func Open(regionname, bucketname string) (*S3, error) {
func Open(regionname, bucketname string) (backend.Backend, error) {
auth, err := aws.EnvAuth()
if err != nil {
return nil, err
@ -42,7 +47,7 @@ func Open(regionname, bucketname string) (*S3, error) {
client := s3.New(auth, aws.Regions[regionname])
return &S3{bucket: client.Bucket(bucketname), path: bucketname}, nil
return OpenS3Bucket(client.Bucket(bucketname), bucketname), nil
}
// Location returns this backend's location (the bucket name).
@ -94,9 +99,9 @@ func (bb *s3Blob) Finalize(t backend.Type, name string) error {
return errors.New("key already exists!")
}
bb.b.mput.Lock()
<-bb.b.connChan
err = bb.b.bucket.Put(path, bb.buf.Bytes(), "binary/octet-stream", "private")
bb.b.mput.Unlock()
bb.b.connChan <- struct{}{}
bb.buf.Reset()
return err
}
@ -118,7 +123,9 @@ func (b *S3) get(t backend.Type, name string) (*s3Blob, error) {
}
path := s3path(t, name)
<-b.connChan
data, err := b.bucket.Get(path)
b.connChan <- struct{}{}
blob.buf = bytes.NewBuffer(data)
return blob, err
}