| /* |
| * 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.hyracks.dataflow.std.sort; |
| |
| import java.nio.ByteBuffer; |
| import java.util.logging.Level; |
| import java.util.logging.Logger; |
| |
| import org.apache.hyracks.api.context.IHyracksTaskContext; |
| import org.apache.hyracks.api.dataflow.value.IBinaryComparatorFactory; |
| import org.apache.hyracks.api.dataflow.value.INormalizedKeyComputerFactory; |
| import org.apache.hyracks.api.dataflow.value.RecordDescriptor; |
| import org.apache.hyracks.api.exceptions.HyracksDataException; |
| import org.apache.hyracks.api.io.FileReference; |
| import org.apache.hyracks.dataflow.common.io.RunFileWriter; |
| import org.apache.hyracks.dataflow.std.buffermanager.EnumFreeSlotPolicy; |
| import org.apache.hyracks.dataflow.std.buffermanager.FrameFreeSlotPolicyFactory; |
| import org.apache.hyracks.dataflow.std.buffermanager.VariableFrameMemoryManager; |
| import org.apache.hyracks.dataflow.std.buffermanager.VariableFramePool; |
| |
| public class HybridTopKSortRunGenerator extends HeapSortRunGenerator { |
| private static final Logger LOG = Logger.getLogger(HybridTopKSortRunGenerator.class.getName()); |
| |
| private static final int SWITCH_TO_FRAME_SORTER_THRESHOLD = 2; |
| private IFrameSorter frameSorter = null; |
| private int tupleSorterFlushedTimes = 0; |
| |
| public HybridTopKSortRunGenerator(IHyracksTaskContext ctx, int frameLimit, int topK, int[] sortFields, |
| INormalizedKeyComputerFactory firstKeyNormalizerFactory, IBinaryComparatorFactory[] comparatorFactories, |
| RecordDescriptor recordDescriptor) { |
| super(ctx, frameLimit, topK, sortFields, firstKeyNormalizerFactory, comparatorFactories, recordDescriptor); |
| } |
| |
| @Override |
| public ISorter getSorter() throws HyracksDataException { |
| if (tupleSorter != null) { |
| return tupleSorter; |
| } else if (frameSorter != null) { |
| return frameSorter; |
| } |
| return null; |
| } |
| |
| @Override |
| protected RunFileWriter getRunFileWriter() throws HyracksDataException { |
| FileReference file = ctx.getJobletContext() |
| .createManagedWorkspaceFile(HybridTopKSortRunGenerator.class.getSimpleName()); |
| return new RunFileWriter(file, ctx.getIOManager()); |
| } |
| |
| @Override |
| public void nextFrame(ByteBuffer buffer) throws HyracksDataException { |
| inAccessor.reset(buffer); |
| if (tupleSorter != null) { |
| boolean isBadK = false; |
| for (int i = 0; i < inAccessor.getTupleCount(); i++) { |
| if (!tupleSorter.insertTuple(inAccessor, i)) { |
| flushFramesToRun(); |
| isBadK = true; |
| if (!tupleSorter.insertTuple(inAccessor, i)) { |
| throw new HyracksDataException("The given tuple is too big to insert into the sorting memory."); |
| } |
| } |
| } |
| if (isBadK) { |
| tupleSorterFlushedTimes++; |
| if (tupleSorterFlushedTimes > SWITCH_TO_FRAME_SORTER_THRESHOLD) { |
| if (tupleSorter.hasRemaining()) { |
| flushFramesToRun(); |
| } |
| tupleSorter.close(); |
| tupleSorter = null; |
| if (LOG.isLoggable(Level.FINE)) { |
| LOG.fine("clear tupleSorter"); |
| } |
| } |
| } |
| } else { |
| if (frameSorter == null) { |
| VariableFrameMemoryManager bufferManager = new VariableFrameMemoryManager( |
| new VariableFramePool(ctx, (frameLimit - 1) * ctx.getInitialFrameSize()), |
| FrameFreeSlotPolicyFactory.createFreeSlotPolicy(EnumFreeSlotPolicy.BIGGEST_FIT, |
| frameLimit - 1)); |
| frameSorter = new FrameSorterMergeSort(ctx, bufferManager, sortFields, nmkFactory, comparatorFactories, |
| recordDescriptor, topK); |
| if (LOG.isLoggable(Level.FINE)) { |
| LOG.fine("create frameSorter"); |
| } |
| } |
| if (!frameSorter.insertFrame(buffer)) { |
| flushFramesToRun(); |
| if (!frameSorter.insertFrame(buffer)) { |
| throw new HyracksDataException("The given frame is too big to insert into the sorting memory."); |
| } |
| } |
| } |
| } |
| } |