KKcorps commented on a change in pull request #5293: URL: https://github.com/apache/incubator-pinot/pull/5293#discussion_r431309682
########## File path: pinot-plugins/pinot-input-format/pinot-protobuf/src/main/java/org/apache/pinot/plugin/inputformat/protobuf/ProtoBufRecordReader.java ########## @@ -0,0 +1,147 @@ +/** + * 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.pinot.plugin.inputformat.protobuf; + +import com.google.protobuf.DescriptorProtos; +import com.google.protobuf.Descriptors; +import com.google.protobuf.DynamicMessage; +import com.google.protobuf.Message; +import java.io.File; +import java.io.FileInputStream; +import java.io.IOException; +import java.io.InputStream; +import java.net.URI; +import java.util.Set; +import javax.annotation.Nullable; +import org.apache.pinot.spi.data.Schema; +import org.apache.pinot.spi.data.readers.GenericRow; +import org.apache.pinot.spi.data.readers.RecordReader; +import org.apache.pinot.spi.data.readers.RecordReaderConfig; +import org.apache.pinot.spi.data.readers.RecordReaderUtils; +import org.apache.pinot.spi.utils.ResourceFinder; +import org.apache.pinot.spi.utils.SchemaFieldExtractorUtils; + + +public class ProtoBufRecordReader implements RecordReader { + private File _dataFile; + private Schema _schema; + private ProtoBufRecordExtractor _recordExtractor; + + private InputStream _inputStream; + private boolean _hasNext; + private Descriptors.Descriptor _descriptor; + + private boolean hasMoreToRead() + throws IOException { + _inputStream.mark(1); + int nextByte = _inputStream.read(); + _inputStream.reset(); + return nextByte != -1; + } + + private void init() + throws IOException { + _inputStream = RecordReaderUtils.getBufferedInputStream(_dataFile); + try { + _hasNext = hasMoreToRead(); + } catch (Exception e) { + _inputStream.close(); + throw e; + } + } + + @Override + public void init(File dataFile, Schema schema, @Nullable RecordReaderConfig recordReaderConfig) + throws IOException { + _dataFile = dataFile; + _schema = schema; + Set<String> sourceFields = SchemaFieldExtractorUtils.extract(schema); + ProtoBufRecordExtractorConfig recordExtractorConfig = new ProtoBufRecordExtractorConfig(); + ProtoBufRecordReaderConfig protoBufRecordReaderConfig = (ProtoBufRecordReaderConfig) recordReaderConfig; + InputStream fin = getDescriptorFileInputStream(protoBufRecordReaderConfig); + buildProtoBufDescriptor(fin); + _recordExtractor = new ProtoBufRecordExtractor(); + _recordExtractor.init(sourceFields, recordExtractorConfig); + init(); + } + + private void buildProtoBufDescriptor(InputStream fin) + throws IOException { + try { + DescriptorProtos.FileDescriptorSet set = DescriptorProtos.FileDescriptorSet.parseFrom(fin); + Descriptors.FileDescriptor fileDescriptor = + Descriptors.FileDescriptor.buildFrom(set.getFile(0), new Descriptors.FileDescriptor[]{}); + _descriptor = fileDescriptor.getMessageTypes().get(0); + } catch (Descriptors.DescriptorValidationException e) { + throw new IOException("Descriptor file validation failed", e); + } + } + + private InputStream getDescriptorFileInputStream(ProtoBufRecordReaderConfig protoBufRecordReaderConfig) + throws IOException { + URI descriptorFileURI = protoBufRecordReaderConfig.getDescriptorFile(); + return ResourceFinder.openResource(descriptorFileURI); + } + + @Override + public boolean hasNext() { + return _hasNext; + } + + @Override + public GenericRow next() + throws IOException { + return next(new GenericRow()); + } + + @Override + public GenericRow next(GenericRow reuse) + throws IOException { + Message message = null; + try { + DynamicMessage tmp = DynamicMessage.getDefaultInstance(_descriptor); + Message.Builder builder = tmp.newBuilderForType(); Review comment: Done. Temp DynamicMessage can be reused but reusing builder is not possible. Moved the temp Dyanmic message to class variable. ---------------------------------------------------------------- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. For queries about this service, please contact Infrastructure at: us...@infra.apache.org --------------------------------------------------------------------- To unsubscribe, e-mail: commits-unsubscr...@pinot.apache.org For additional commands, e-mail: commits-h...@pinot.apache.org
