forked from apache/beam
/
main.go
64 lines (55 loc) · 1.97 KB
/
main.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.
// beam-playground:
// name: text-io-gcs-read
// description: TextIO GCS read example.
// multifile: false
// context_line: 29
// categories:
// - Quickstart
// complexity: MEDIUM
// tags:
// - hellobeam
package main
import (
"context"
"github.com/apache/beam/sdks/v2/go/pkg/beam"
"github.com/apache/beam/sdks/v2/go/pkg/beam/io/textio"
"github.com/apache/beam/sdks/v2/go/pkg/beam/log"
"github.com/apache/beam/sdks/v2/go/pkg/beam/x/beamx"
"regexp"
"fmt"
_ "github.com/apache/beam/sdks/v2/go/pkg/beam/io/filesystem/gcs"
_ "github.com/apache/beam/sdks/v2/go/pkg/beam/io/filesystem/local"
)
var wordRE = regexp.MustCompile(`[a-zA-Z]+('[a-z])?`)
func main() {
beam.Init()
p := beam.NewPipeline()
s := p.Root()
input := textio.Read(s, "gs://apache-beam-samples/shakespeare/kinglear.txt")
applyTransform(s, input)
err := beamx.Run(context.Background(), p)
if err != nil {
log.Exitf(context.Background(), "Failed to execute job: %v", err)
}
}
func applyTransform(s beam.Scope, input beam.PCollection) {
beam.ParDo0(s, func(line string) {
for _, word := range wordRE.FindAllString(line, -1) {
fmt.Println(word)
}
}, input)
}