| /* |
| * 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 org.apache.hudi.table.action.commit; |
| |
| import java.io.ByteArrayOutputStream; |
| import org.apache.avro.generic.GenericDatumReader; |
| import org.apache.avro.generic.GenericDatumWriter; |
| import org.apache.avro.io.BinaryDecoder; |
| import org.apache.avro.io.BinaryEncoder; |
| import org.apache.avro.io.DecoderFactory; |
| import org.apache.avro.io.EncoderFactory; |
| import org.apache.hadoop.fs.Path; |
| import org.apache.hudi.avro.HoodieAvroUtils; |
| import org.apache.hudi.client.utils.MergingIterator; |
| import org.apache.hudi.common.model.HoodieBaseFile; |
| import org.apache.hudi.common.model.HoodieRecordPayload; |
| import org.apache.hudi.common.util.queue.BoundedInMemoryQueueConsumer; |
| import org.apache.hudi.exception.HoodieException; |
| import org.apache.hudi.io.HoodieMergeHandle; |
| import org.apache.hudi.io.storage.HoodieFileReader; |
| import org.apache.hudi.io.storage.HoodieFileReaderFactory; |
| import org.apache.hudi.table.HoodieTable; |
| |
| import org.apache.avro.Schema; |
| import org.apache.avro.generic.GenericRecord; |
| import org.apache.hadoop.conf.Configuration; |
| |
| import java.io.IOException; |
| import java.util.Iterator; |
| |
| /** |
| * Helper to read records from previous version of parquet and run Merge. |
| */ |
| public abstract class AbstractMergeHelper<T extends HoodieRecordPayload, I, K, O> { |
| |
| /** |
| * Read records from previous version of base file and merge. |
| * @param table Hoodie Table |
| * @param upsertHandle Merge Handle |
| * @throws IOException in case of error |
| */ |
| public abstract void runMerge(HoodieTable<T, I, K, O> table, HoodieMergeHandle<T, I, K, O> upsertHandle) throws IOException; |
| |
| protected GenericRecord transformRecordBasedOnNewSchema(GenericDatumReader<GenericRecord> gReader, GenericDatumWriter<GenericRecord> gWriter, |
| ThreadLocal<BinaryEncoder> encoderCache, ThreadLocal<BinaryDecoder> decoderCache, |
| GenericRecord gRec) { |
| ByteArrayOutputStream inStream = null; |
| try { |
| inStream = new ByteArrayOutputStream(); |
| BinaryEncoder encoder = EncoderFactory.get().binaryEncoder(inStream, encoderCache.get()); |
| encoderCache.set(encoder); |
| gWriter.write(gRec, encoder); |
| encoder.flush(); |
| |
| BinaryDecoder decoder = DecoderFactory.get().binaryDecoder(inStream.toByteArray(), decoderCache.get()); |
| decoderCache.set(decoder); |
| GenericRecord transformedRec = gReader.read(null, decoder); |
| return transformedRec; |
| } catch (IOException e) { |
| throw new HoodieException(e); |
| } finally { |
| try { |
| inStream.close(); |
| } catch (IOException ioe) { |
| throw new HoodieException(ioe.getMessage(), ioe); |
| } |
| } |
| } |
| |
| /** |
| * Create Parquet record iterator that provides a stitched view of record read from skeleton and bootstrap file. |
| * Skeleton file is a representation of the bootstrap file inside the table, with just the bare bone fields needed |
| * for indexing, writing and other functionality. |
| * |
| */ |
| protected Iterator<GenericRecord> getMergingIterator(HoodieTable<T, I, K, O> table, HoodieMergeHandle<T, I, K, O> mergeHandle, |
| HoodieBaseFile baseFile, HoodieFileReader<GenericRecord> reader, |
| Schema readSchema, boolean externalSchemaTransformation) throws IOException { |
| Path externalFilePath = new Path(baseFile.getBootstrapBaseFile().get().getPath()); |
| Configuration bootstrapFileConfig = new Configuration(table.getHadoopConf()); |
| HoodieFileReader<GenericRecord> bootstrapReader = HoodieFileReaderFactory.<T, GenericRecord>getFileReader(bootstrapFileConfig, externalFilePath); |
| Schema bootstrapReadSchema; |
| if (externalSchemaTransformation) { |
| bootstrapReadSchema = bootstrapReader.getSchema(); |
| } else { |
| bootstrapReadSchema = mergeHandle.getWriterSchema(); |
| } |
| |
| return new MergingIterator<>(reader.getRecordIterator(readSchema), bootstrapReader.getRecordIterator(bootstrapReadSchema), |
| (inputRecordPair) -> HoodieAvroUtils.stitchRecords(inputRecordPair.getLeft(), inputRecordPair.getRight(), mergeHandle.getWriterSchemaWithMetafields())); |
| } |
| |
| /** |
| * Consumer that dequeues records from queue and sends to Merge Handle. |
| */ |
| protected static class UpdateHandler extends BoundedInMemoryQueueConsumer<GenericRecord, Void> { |
| |
| private final HoodieMergeHandle upsertHandle; |
| |
| protected UpdateHandler(HoodieMergeHandle upsertHandle) { |
| this.upsertHandle = upsertHandle; |
| } |
| |
| @Override |
| protected void consumeOneRecord(GenericRecord record) { |
| upsertHandle.write(record); |
| } |
| |
| @Override |
| protected void finish() {} |
| |
| @Override |
| protected Void getResult() { |
| return null; |
| } |
| } |
| } |