/
record_arrow_reader.go
78 lines (66 loc) · 2.13 KB
/
record_arrow_reader.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 tunnel
import (
"io"
"net/http"
"github.com/aliyun/aliyun-odps-go-sdk/arrow"
"github.com/aliyun/aliyun-odps-go-sdk/arrow/array"
"github.com/aliyun/aliyun-odps-go-sdk/arrow/ipc"
"github.com/pkg/errors"
)
type RecordArrowReader struct {
httpRes *http.Response
recordBatchReader *ipc.RecordBatchReader
arrowReader *ArrowStreamReader
}
func newRecordArrowReader(res *http.Response, schema *arrow.Schema) RecordArrowReader {
httpReader := NewArrowStreamReader(res.Body)
return RecordArrowReader{
httpRes: res,
recordBatchReader: ipc.NewRecordBatchReader(httpReader, schema),
arrowReader: httpReader,
}
}
func (r *RecordArrowReader) HttpRes() *http.Response {
return r.httpRes
}
func (r *RecordArrowReader) RecordBatchReader() *ipc.RecordBatchReader {
return r.recordBatchReader
}
func (r *RecordArrowReader) Iterator(f func(array.Record, error)) {
for {
record, err := r.recordBatchReader.Read()
isEOF := errors.Is(err, io.EOF)
if isEOF {
return
}
if err != nil {
f(record, err)
return
}
record.Retain()
f(record, err)
}
}
func (r *RecordArrowReader) Read() (array.Record, error) {
record, err := r.recordBatchReader.Read()
return record, errors.WithStack(err)
}
func (r *RecordArrowReader) Close() error {
r.recordBatchReader.Release()
return errors.WithStack(r.arrowReader.Close())
}