import multiple tables at same time - 1 #2191
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| /* | ||
| Copyright (c) YugabyteDB, Inc. | ||
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| Licensed 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 | ||
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| http://www.apache.org/licenses/LICENSE-2.0 | ||
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| 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 cmd | ||
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| import ( | ||
| "fmt" | ||
| "io" | ||
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| log "github.com/sirupsen/logrus" | ||
| "github.com/yugabyte/yb-voyager/yb-voyager/src/datafile" | ||
| "github.com/yugabyte/yb-voyager/yb-voyager/src/utils" | ||
| ) | ||
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| type FileBatchProducer struct { | ||
| task *ImportFileTask | ||
| state *ImportDataState | ||
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| pendingBatches []*Batch | ||
| lastBatchNumber int64 | ||
| lastOffset int64 | ||
| fileFullySplit bool | ||
| completed bool | ||
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| dataFile datafile.DataFile | ||
| header string | ||
| numLinesTaken int64 | ||
| lineFromPreviousBatch string | ||
| } | ||
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| func NewFileBatchProducer(task *ImportFileTask, state *ImportDataState) (*FileBatchProducer, error) { | ||
| err := state.PrepareForFileImport(task.FilePath, task.TableNameTup) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("preparing for file import: %s", err) | ||
| } | ||
| pendingBatches, lastBatchNumber, lastOffset, fileFullySplit, err := state.Recover(task.FilePath, task.TableNameTup) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("recovering state for table: %q: %s", task.TableNameTup, err) | ||
| } | ||
| var completed bool | ||
| if len(pendingBatches) == 0 && fileFullySplit { | ||
| completed = true | ||
| } | ||
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| return &FileBatchProducer{ | ||
| task: task, | ||
| state: state, | ||
| pendingBatches: pendingBatches, | ||
| lastBatchNumber: lastBatchNumber, | ||
| lastOffset: lastOffset, | ||
| fileFullySplit: fileFullySplit, | ||
| completed: completed, | ||
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There was a problem hiding this comment. nit: |
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| numLinesTaken: lastOffset, | ||
| }, nil | ||
| } | ||
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| func (p *FileBatchProducer) Done() bool { | ||
| return p.completed | ||
| } | ||
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| func (p *FileBatchProducer) NextBatch() (*Batch, error) { | ||
| if p.Done() { | ||
| return nil, fmt.Errorf("already completed producing all batches") | ||
| } | ||
| if len(p.pendingBatches) > 0 { | ||
| batch := p.pendingBatches[0] | ||
| p.pendingBatches = p.pendingBatches[1:] | ||
| // file is fully split and returning the last batch, so mark the producer as completed | ||
| if len(p.pendingBatches) == 0 && p.fileFullySplit { | ||
| p.completed = true | ||
| } | ||
| return batch, nil | ||
| } | ||
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| return p.produceNextBatch() | ||
| } | ||
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| func (p *FileBatchProducer) produceNextBatch() (*Batch, error) { | ||
| if p.dataFile == nil { | ||
| err := p.openDataFile() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| } | ||
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| var readLineErr error | ||
| var line string | ||
| var currentBytesRead int64 | ||
| batchNum := p.lastBatchNumber + 1 | ||
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| batchWriter, err := p.newBatchWriter() | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
| if p.lineFromPreviousBatch != "" { | ||
| err = batchWriter.WriteRecord(p.lineFromPreviousBatch) | ||
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There was a problem hiding this comment. Add comment for explaining about this |
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| if err != nil { | ||
| return nil, fmt.Errorf("Write to batch %d: %s", batchNum, err) | ||
| } | ||
| p.lineFromPreviousBatch = "" | ||
| } | ||
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| for readLineErr == nil { | ||
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| line, currentBytesRead, readLineErr = p.dataFile.NextLine() | ||
| if readLineErr == nil || (readLineErr == io.EOF && line != "") { | ||
| // handling possible case: last dataline(i.e. EOF) but no newline char at the end | ||
| p.numLinesTaken += 1 | ||
| } | ||
| log.Debugf("Batch %d: totalBytesRead %d, currentBytes %d \n", batchNum, p.dataFile.GetBytesRead(), currentBytesRead) | ||
| if currentBytesRead > tdb.MaxBatchSizeInBytes() { | ||
| //If a row is itself larger than MaxBatchSizeInBytes erroring out | ||
| ybSpecificMsg := "" | ||
| if tconf.TargetDBType == YUGABYTEDB { | ||
| ybSpecificMsg = ", but should be strictly lower than the the rpc_max_message_size on YugabyteDB (default 267386880 bytes)" | ||
| } | ||
| return nil, fmt.Errorf("record of size %d larger than max batch size: record num=%d for table %q in file %s is larger than the max batch size %d bytes. Max Batch size can be changed using env var MAX_BATCH_SIZE_BYTES%s", currentBytesRead, p.numLinesTaken, p.task.TableNameTup.ForOutput(), p.task.FilePath, tdb.MaxBatchSizeInBytes(), ybSpecificMsg) | ||
| } | ||
| if line != "" { | ||
| // can't use importBatchArgsProto.Columns as to use case insenstiive column names | ||
| columnNames, _ := TableToColumnNames.Get(p.task.TableNameTup) | ||
| line, err = valueConverter.ConvertRow(p.task.TableNameTup, columnNames, line) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("transforming line number=%d for table: %q in file %s: %s", p.numLinesTaken, p.task.TableNameTup.ForOutput(), p.task.FilePath, err) | ||
| } | ||
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| // Check if adding this record exceeds the max batch size | ||
| if batchWriter.NumRecordsWritten == batchSizeInNumRows || | ||
| p.dataFile.GetBytesRead() > tdb.MaxBatchSizeInBytes() { // GetBytesRead - returns the total bytes read until now including the currentBytesRead | ||
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| // Finalize the current batch without adding the record | ||
| batch, err := p.finalizeBatch(batchWriter, false, p.numLinesTaken-1, p.dataFile.GetBytesRead()-currentBytesRead) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| //carry forward the bytes to next batch | ||
| p.dataFile.ResetBytesRead(currentBytesRead) | ||
| p.lineFromPreviousBatch = line | ||
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| // Start a new batch by calling the initBatchWriter function | ||
| // initBatchWriter() | ||
| return batch, nil | ||
| } | ||
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| // Write the record to the new or current batch | ||
| err = batchWriter.WriteRecord(line) | ||
| if err != nil { | ||
| return nil, fmt.Errorf("Write to batch %d: %s", batchNum, err) | ||
| } | ||
| } | ||
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| // Finalize the batch if it's the last line or the end of the file and reset the bytes read to 0 | ||
| if readLineErr == io.EOF { | ||
| batch, err := p.finalizeBatch(batchWriter, true, p.numLinesTaken, p.dataFile.GetBytesRead()) | ||
| if err != nil { | ||
| return nil, err | ||
| } | ||
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| p.completed = true | ||
| p.dataFile.ResetBytesRead(0) | ||
| return batch, nil | ||
| } else if readLineErr != nil { | ||
| return nil, fmt.Errorf("read line from data file: %q: %s", p.task.FilePath, readLineErr) | ||
| } | ||
| } | ||
| // ideally should not reach here | ||
| return nil, fmt.Errorf("could not produce next batch: err: %w", readLineErr) | ||
| } | ||
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| func (p *FileBatchProducer) openDataFile() error { | ||
| reader, err := dataStore.Open(p.task.FilePath) | ||
| if err != nil { | ||
| return fmt.Errorf("preparing reader for split generation on file: %q: %v", p.task.FilePath, err) | ||
| } | ||
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| dataFile, err := datafile.NewDataFile(p.task.FilePath, reader, dataFileDescriptor) | ||
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| if err != nil { | ||
| return fmt.Errorf("open datafile: %q: %v", p.task.FilePath, err) | ||
| } | ||
| p.dataFile = dataFile | ||
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| log.Infof("Skipping %d lines from %q", p.lastOffset, p.task.FilePath) | ||
| err = dataFile.SkipLines(p.lastOffset) | ||
| if err != nil { | ||
| return fmt.Errorf("skipping line for offset=%d: %v", p.lastOffset, err) | ||
| } | ||
| if dataFileDescriptor.HasHeader { | ||
| p.header = dataFile.GetHeader() | ||
| } | ||
| return nil | ||
| } | ||
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| func (p *FileBatchProducer) newBatchWriter() (*BatchWriter, error) { | ||
| batchNum := p.lastBatchNumber + 1 | ||
| batchWriter := p.state.NewBatchWriter(p.task.FilePath, p.task.TableNameTup, batchNum) | ||
| err := batchWriter.Init() | ||
| if err != nil { | ||
| return nil, fmt.Errorf("initializing batch writer for table: %q: %s", p.task.TableNameTup, err) | ||
| } | ||
| // Write the header if necessary | ||
| if p.header != "" && dataFileDescriptor.FileFormat == datafile.CSV { | ||
| err = batchWriter.WriteHeader(p.header) | ||
| if err != nil { | ||
| utils.ErrExit("writing header for table: %q: %s", p.task.TableNameTup, err) | ||
| } | ||
| } | ||
| return batchWriter, nil | ||
| } | ||
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| func (p *FileBatchProducer) finalizeBatch(batchWriter *BatchWriter, isLastBatch bool, offsetEnd int64, bytesInBatch int64) (*Batch, error) { | ||
| batchNum := p.lastBatchNumber + 1 | ||
| batch, err := batchWriter.Done(isLastBatch, offsetEnd, bytesInBatch) | ||
| if err != nil { | ||
| utils.ErrExit("finalizing batch %d: %s", batchNum, err) | ||
| } | ||
| batchWriter = nil | ||
| p.lastBatchNumber = batchNum | ||
| return batch, nil | ||
| } | ||
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Do we need to do this
PrepareForFileImporthere? we are already doing it inNewFileBatchProducer