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Copy pathstream_to_file.cc
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62 lines (55 loc) · 2.01 KB
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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.
#include <iostream>
#include <memory>
#include <string>
#include "arrow/io/stdio.h"
#include "arrow/ipc/reader.h"
#include "arrow/ipc/writer.h"
#include "arrow/record_batch.h"
#include "arrow/status.h"
namespace arrow {
namespace ipc {
// Converts a stream from stdin to a file written to standard out.
// A typical usage would be:
// $ <program that produces streaming output> | stream-to-file > file.arrow
Status ConvertToFile() {
io::StdinStream input;
io::StdoutStream sink;
IpcWriteOptions write_options;
write_options.emit_dictionary_deltas = true;
ARROW_ASSIGN_OR_RAISE(auto reader, RecordBatchStreamReader::Open(&input));
ARROW_ASSIGN_OR_RAISE(auto writer,
MakeFileWriter(&sink, reader->schema(), write_options));
std::shared_ptr<RecordBatch> batch;
while (true) {
ARROW_ASSIGN_OR_RAISE(batch, reader->Next());
if (batch == nullptr) break;
RETURN_NOT_OK(writer->WriteRecordBatch(*batch));
}
return writer->Close();
}
} // namespace ipc
} // namespace arrow
int main(int argc, char** argv) {
arrow::Status status = arrow::ipc::ConvertToFile();
if (!status.ok()) {
std::cerr << "Could not convert to file: " << status.ToString() << std::endl;
return 1;
}
return 0;
}