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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 main
import (
"bufio"
"bytes"
"flag"
"fmt"
"log"
"os"
"runtime/pprof"
"time"
"github.com/apache/arrow-go/v18/arrow/avro"
"github.com/apache/arrow-go/v18/parquet"
"github.com/apache/arrow-go/v18/parquet/compress"
pq "github.com/apache/arrow-go/v18/parquet/pqarrow"
)
var (
cpuprofile = flag.String("cpuprofile", "", "write cpu profile to `file`")
filepath = flag.String("file", "", "avro ocf to convert")
)
func main() {
flag.Parse()
if *cpuprofile != "" {
f, err := os.Create(*cpuprofile)
if err != nil {
log.Fatal("could not create CPU profile: ", err)
}
defer f.Close() // error handling omitted for example
if err := pprof.StartCPUProfile(f); err != nil {
log.Fatal("could not start CPU profile: ", err)
}
defer pprof.StopCPUProfile()
}
if *filepath == "" {
fmt.Println("no file specified")
}
chunk := 1024 * 8
ts := time.Now()
log.Println("starting:")
info, err := os.Stat(*filepath)
if err != nil {
fmt.Println(err)
os.Exit(1)
}
filesize := info.Size()
data, err := os.ReadFile(*filepath)
if err != nil {
fmt.Println(err)
os.Exit(2)
}
fmt.Printf("file : %v\nsize: %v MB\n", filepath, float64(filesize)/1024/1024)
r := bytes.NewReader(data)
ior := bufio.NewReaderSize(r, 4096*8)
av2arReader, err := avro.NewOCFReader(ior, avro.WithChunk(chunk))
if err != nil {
fmt.Println(err)
os.Exit(3)
}
fp, err := os.OpenFile(*filepath+".parquet", os.O_CREATE|os.O_WRONLY|os.O_TRUNC, 0o644)
if err != nil {
fmt.Println(err)
os.Exit(4)
}
defer fp.Close()
pwProperties := parquet.NewWriterProperties(parquet.WithDictionaryDefault(true),
parquet.WithVersion(parquet.V2_LATEST),
parquet.WithCompression(compress.Codecs.Snappy),
parquet.WithBatchSize(1024*32),
parquet.WithDataPageSize(1024*1024),
parquet.WithMaxRowGroupLength(64*1024*1024),
)
awProperties := pq.NewArrowWriterProperties(pq.WithStoreSchema())
pr, err := pq.NewFileWriter(av2arReader.Schema(), fp, pwProperties, awProperties)
if err != nil {
fmt.Println(err)
os.Exit(5)
}
defer pr.Close()
fmt.Printf("parquet version: %v\n", pwProperties.Version())
for av2arReader.Next() {
if av2arReader.Err() != nil {
fmt.Println(err)
os.Exit(6)
}
recs := av2arReader.Record()
err = pr.WriteBuffered(recs)
if err != nil {
fmt.Println(err)
os.Exit(7)
}
recs.Release()
}
if av2arReader.Err() != nil {
fmt.Println(av2arReader.Err())
}
pr.Close()
log.Printf("time to convert: %v\n", time.Since(ts))
}
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