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StorageDriver: GCS: retry all api calls 

Signed-off-by: Arthur Baars <arthur@semmle.com>
master
Arthur Baars 2016-01-19 14:40:00 +00:00
parent ffc9527782
commit 59a9607783
1 changed files with 50 additions and 14 deletions
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64
docs/storage/driver/gcs/gcs.go
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@ -206,7 +206,7 @@ func (d *driver) ReadStream(context ctx.Context, path string, offset int64) (io.
}
if res.StatusCode == http.StatusRequestedRangeNotSatisfiable {
res.Body.Close()
obj, err := storage.StatObject(d.context(context), d.bucket, name)
obj, err := storageStatObject(d.context(context), d.bucket, name)
if err != nil {
return nil, err
}
@ -287,7 +287,7 @@ func (d *driver) WriteStream(context ctx.Context, path string, offset int64, rea
}
// wc was closed succesfully, so the temporary part exists, schedule it for deletion at the end
// of the function
defer storage.DeleteObject(gcsContext, d.bucket, partName)
defer storageDeleteObject(gcsContext, d.bucket, partName)
req := &storageapi.ComposeRequest{
Destination: &storageapi.Object{Bucket: obj.Bucket, Name: obj.Name, ContentType: obj.ContentType},
@ -386,7 +386,7 @@ func (d *driver) Stat(context ctx.Context, path string) (storagedriver.FileInfo,
var fi storagedriver.FileInfoFields
//try to get as file
gcsContext := d.context(context)
obj, err := storage.StatObject(gcsContext, d.bucket, d.pathToKey(path))
obj, err := storageStatObject(gcsContext, d.bucket, d.pathToKey(path))
if err == nil {
fi = storagedriver.FileInfoFields{
Path: path,
@ -404,7 +404,7 @@ func (d *driver) Stat(context ctx.Context, path string) (storagedriver.FileInfo,
query.Prefix = dirpath
query.MaxResults = 1
objects, err := storage.ListObjects(gcsContext, d.bucket, query)
objects, err := storageListObjects(gcsContext, d.bucket, query)
if err != nil {
return nil, err
}
@ -432,7 +432,7 @@ func (d *driver) List(context ctx.Context, path string) ([]string, error) {
query.Prefix = d.pathToDirKey(path)
list := make([]string, 0, 64)
for {
objects, err := storage.ListObjects(d.context(context), d.bucket, query)
objects, err := storageListObjects(d.context(context), d.bucket, query)
if err != nil {
return nil, err
}
@ -482,7 +482,7 @@ func (d *driver) Move(context ctx.Context, sourcePath string, destPath string) e
var err error
for _, key := range keys {
dest := destPrefix + key[len(prefix):]
_, err = storage.CopyObject(gcsContext, d.bucket, key, d.bucket, dest, nil)
_, err = storageCopyObject(gcsContext, d.bucket, key, d.bucket, dest, nil)
if err == nil {
copies = append(copies, dest)
} else {
@ -492,20 +492,20 @@ func (d *driver) Move(context ctx.Context, sourcePath string, destPath string) e
// if an error occurred, attempt to cleanup the copies made
if err != nil {
for i := len(copies) - 1; i >= 0; i-- {
_ = storage.DeleteObject(gcsContext, d.bucket, copies[i])
_ = storageDeleteObject(gcsContext, d.bucket, copies[i])
}
return err
}
// delete originals
for i := len(keys) - 1; i >= 0; i-- {
err2 := storage.DeleteObject(gcsContext, d.bucket, keys[i])
err2 := storageDeleteObject(gcsContext, d.bucket, keys[i])
if err2 != nil {
err = err2
}
}
return err
}
_, err = storage.CopyObject(gcsContext, d.bucket, d.pathToKey(sourcePath), d.bucket, d.pathToKey(destPath), nil)
_, err = storageCopyObject(gcsContext, d.bucket, d.pathToKey(sourcePath), d.bucket, d.pathToKey(destPath), nil)
if err != nil {
if status := err.(*googleapi.Error); status != nil {
if status.Code == http.StatusNotFound {
@ -514,7 +514,7 @@ func (d *driver) Move(context ctx.Context, sourcePath string, destPath string) e
}
return err
}
return storage.DeleteObject(gcsContext, d.bucket, d.pathToKey(sourcePath))
return storageDeleteObject(gcsContext, d.bucket, d.pathToKey(sourcePath))
}
// listAll recursively lists all names of objects stored at "prefix" and its subpaths.
@ -524,7 +524,7 @@ func (d *driver) listAll(context context.Context, prefix string) ([]string, erro
query.Prefix = prefix
query.Versions = false
for {
objects, err := storage.ListObjects(d.context(context), d.bucket, query)
objects, err := storageListObjects(d.context(context), d.bucket, query)
if err != nil {
return nil, err
}
@ -555,8 +555,8 @@ func (d *driver) Delete(context ctx.Context, path string) error {
if len(keys) > 0 {
sort.Sort(sort.Reverse(sort.StringSlice(keys)))
for _, key := range keys {
err := storage.DeleteObject(gcsContext, d.bucket, key)
// GCS only guarantees eventual consistency, solistAll might return
err := storageDeleteObject(gcsContext, d.bucket, key)
// GCS only guarantees eventual consistency, so listAll might return
// paths that no longer exist. If this happens, just ignore any not
// found error
if status, ok := err.(*googleapi.Error); ok {
@ -570,7 +570,7 @@ func (d *driver) Delete(context ctx.Context, path string) error {
}
return nil
}
err = storage.DeleteObject(gcsContext, d.bucket, d.pathToKey(path))
err = storageDeleteObject(gcsContext, d.bucket, d.pathToKey(path))
if err != nil {
if status := err.(*googleapi.Error); status != nil {
if status.Code == http.StatusNotFound {
@ -581,6 +581,42 @@ func (d *driver) Delete(context ctx.Context, path string) error {
return err
}
func storageDeleteObject(context context.Context, bucket string, name string) error {
return retry(5, func() error {
return storage.DeleteObject(context, bucket, name)
})
}
func storageStatObject(context context.Context, bucket string, name string) (*storage.Object, error) {
var obj *storage.Object
err := retry(5, func() error {
var err error
obj, err = storage.StatObject(context, bucket, name)
return err
})
return obj, err
}
func storageListObjects(context context.Context, bucket string, q *storage.Query) (*storage.Objects, error) {
var objs *storage.Objects
err := retry(5, func() error {
var err error
objs, err = storage.ListObjects(context, bucket, q)
return err
})
return objs, err
}
func storageCopyObject(context context.Context, srcBucket, srcName string, destBucket, destName string, attrs *storage.ObjectAttrs) (*storage.Object, error) {
var obj *storage.Object
err := retry(5, func() error {
var err error
obj, err = storage.CopyObject(context, srcBucket, srcName, destBucket, destName, attrs)
return err
})
return obj, err
}
// URLFor returns a URL which may be used to retrieve the content stored at
// the given path, possibly using the given options.
// Returns ErrUnsupportedMethod if this driver has no privateKey