| /* |
| * 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.flink.table.runtime.sort; |
| |
| import org.apache.flink.api.common.io.blockcompression.BlockCompressionFactory; |
| import org.apache.flink.runtime.io.disk.ChannelReaderInputViewIterator; |
| import org.apache.flink.runtime.io.disk.iomanager.AbstractChannelReaderInputView; |
| import org.apache.flink.runtime.io.disk.iomanager.IOManager; |
| import org.apache.flink.runtime.memory.AbstractPagedOutputView; |
| import org.apache.flink.table.dataformat.BinaryRow; |
| import org.apache.flink.table.typeutils.BinaryRowSerializer; |
| import org.apache.flink.util.MutableObjectIterator; |
| |
| import org.slf4j.Logger; |
| import org.slf4j.LoggerFactory; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.Comparator; |
| import java.util.List; |
| |
| /** |
| * Record merger for sort. |
| */ |
| public class BinaryExternalMerger extends AbstractBinaryExternalMerger<BinaryRow> { |
| |
| private static final Logger LOG = LoggerFactory.getLogger(BinaryExternalMerger.class); |
| |
| private final BinaryRowSerializer serializer; |
| private final RecordComparator comparator; |
| |
| public BinaryExternalMerger( |
| IOManager ioManager, |
| int pageSize, |
| int maxFanIn, |
| SpillChannelManager channelManager, |
| BinaryRowSerializer serializer, |
| RecordComparator comparator, |
| boolean compressionEnable, |
| BlockCompressionFactory compressionCodecFactory, |
| int compressionBlockSize) { |
| super(ioManager, pageSize, maxFanIn, channelManager, compressionEnable, compressionCodecFactory, compressionBlockSize); |
| this.serializer = serializer; |
| this.comparator = comparator; |
| } |
| |
| @Override |
| protected MutableObjectIterator<BinaryRow> channelReaderInputViewIterator(AbstractChannelReaderInputView inView) { |
| return new ChannelReaderInputViewIterator<>(inView, null, serializer.duplicate()); |
| } |
| |
| @Override |
| protected Comparator<BinaryRow> mergeComparator() { |
| return (o1, o2) -> comparator.compare(o1, o2); |
| } |
| |
| @Override |
| protected List<BinaryRow> mergeReusedEntries(int size) { |
| ArrayList<BinaryRow> reused = new ArrayList<>(size); |
| for (int i = 0; i < size; i++) { |
| reused.add(serializer.createInstance()); |
| } |
| return reused; |
| } |
| |
| @Override |
| protected void writeMergingOutput( |
| MutableObjectIterator<BinaryRow> mergeIterator, |
| AbstractPagedOutputView output) throws IOException { |
| // read the merged stream and write the data back |
| BinaryRow rec = serializer.createInstance(); |
| while ((rec = mergeIterator.next(rec)) != null) { |
| serializer.serialize(rec, output); |
| } |
| } |
| } |