/
stage.go
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/
stage.go
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// Licensed to the Apache Software Foundation (ASF) under one or more
// contributor license agreements. See the NOTICE file distributed with
// this work for additional information regarding copyright ownership.
// The ASF licenses this file to You 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 dataflowlib
import (
"bytes"
"context"
"crypto/sha256"
"encoding/hex"
"io"
"os"
"cloud.google.com/go/storage"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/graph"
"github.com/apache/beam/sdks/v2/go/pkg/beam/core/runtime/xlangx"
"github.com/apache/beam/sdks/v2/go/pkg/beam/internal/errors"
"github.com/apache/beam/sdks/v2/go/pkg/beam/util/gcsx"
)
// StageModel uploads the pipeline model to GCS as a unique object.
func StageModel(ctx context.Context, project, modelURL string, model []byte) error {
return upload(ctx, project, modelURL, bytes.NewReader(model))
}
// stageFile uploads a file to GCS, and returns the sha256 hash.
func stageFile(ctx context.Context, project, url, filename string) (string, error) {
fd, err := os.Open(filename)
if err != nil {
return "", errors.Wrapf(err, "failed to open file %s", filename)
}
defer fd.Close()
sha256W := sha256.New()
tee := io.TeeReader(fd, sha256W)
if err := upload(ctx, project, url, tee); err != nil {
return "", err
}
hash := hex.EncodeToString(sha256W.Sum(nil))
return hash, nil
}
func upload(ctx context.Context, project, object string, r io.Reader) error {
bucket, obj, err := gcsx.ParseObject(object)
if err != nil {
return errors.Wrapf(err, "invalid staging location %v", object)
}
client, err := gcsx.NewClient(ctx, storage.ScopeReadWrite)
if err != nil {
return err
}
_, err = gcsx.Upload(ctx, client, project, bucket, obj, r)
return err
}
// ResolveXLangArtifacts resolves cross-language artifacts with a given GCS
// URL as a destination, and then stages all local artifacts to that URL. This
// function returns a list of staged artifact URLs.
func ResolveXLangArtifacts(ctx context.Context, edges []*graph.MultiEdge, project, url string) ([]string, error) {
cfg := xlangx.ResolveConfig{
SdkPath: url,
JoinFn: func(url, name string) string {
return gcsx.Join(url, "/", name)
},
}
paths, err := xlangx.ResolveArtifactsWithConfig(ctx, edges, cfg)
xlangx.UpdateArtifactTypeFromFileToURL(edges)
if err != nil {
return nil, err
}
var urls []string
for local, remote := range paths {
_, err := stageFile(ctx, project, remote, local)
if err != nil {
return nil, errors.WithContextf(err, "staging file to %v", remote)
}
urls = append(urls, remote)
}
return urls, nil
}