forked from jacobsa/gcloud
/
create_objects.go
65 lines (55 loc) · 1.54 KB
/
create_objects.go
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// Copyright 2015 Google Inc. All Rights Reserved.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License 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 gcsutil
import (
"github.com/jacobsa/gcloud/gcs"
"github.com/jacobsa/syncutil"
"golang.org/x/net/context"
)
// Create multiple objects with some parallelism, with contents according to
// the supplied map from name to contents.
func CreateObjects(
ctx context.Context,
bucket gcs.Bucket,
input map[string][]byte) (err error) {
bundle := syncutil.NewBundle(ctx)
// Feed ObjectInfo records into a channel.
type record struct {
name string
contents []byte
}
recordChan := make(chan record, len(input))
for name, contents := range input {
recordChan <- record{name, contents}
}
close(recordChan)
// Create the objects in parallel.
const parallelism = 64
for i := 0; i < 10; i++ {
bundle.Add(func(ctx context.Context) (err error) {
for r := range recordChan {
_, err = CreateObject(
ctx, bucket,
r.name,
r.contents)
if err != nil {
return
}
}
return
})
}
err = bundle.Join()
return
}