| /* |
| * 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.drill.exec.physical.impl.sort; |
| |
| import java.util.concurrent.TimeUnit; |
| |
| import javax.inject.Named; |
| |
| import org.apache.drill.exec.exception.SchemaChangeException; |
| import org.apache.drill.exec.ops.FragmentContext; |
| import org.apache.drill.exec.record.RecordBatch; |
| import org.apache.drill.exec.record.VectorContainer; |
| import org.apache.drill.exec.record.selection.SelectionVector4; |
| import org.apache.hadoop.util.IndexedSortable; |
| import org.apache.hadoop.util.QuickSort; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Stopwatch; |
| |
| public abstract class SortTemplate implements Sorter, IndexedSortable{ |
| static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(SortTemplate.class); |
| |
| private SelectionVector4 vector4; |
| |
| |
| public void setup(FragmentContext context, SelectionVector4 vector4, VectorContainer hyperBatch) throws SchemaChangeException{ |
| // we pass in the local hyperBatch since that is where we'll be reading data. |
| Preconditions.checkNotNull(vector4); |
| this.vector4 = vector4; |
| doSetup(context, hyperBatch, null); |
| } |
| |
| @Override |
| public void sort(SelectionVector4 vector4, VectorContainer container){ |
| Stopwatch watch = Stopwatch.createStarted(); |
| QuickSort qs = new QuickSort(); |
| qs.sort(this, 0, vector4.getTotalCount()); |
| logger.debug("Took {} us to sort {} records", watch.elapsed(TimeUnit.MICROSECONDS), vector4.getTotalCount()); |
| } |
| |
| @Override |
| public void swap(int sv0, int sv1) { |
| int tmp = vector4.get(sv0); |
| vector4.set(sv0, vector4.get(sv1)); |
| vector4.set(sv1, tmp); |
| } |
| |
| @Override |
| public int compare(int leftIndex, int rightIndex) { |
| int sv1 = vector4.get(leftIndex); |
| int sv2 = vector4.get(rightIndex); |
| return doEval(sv1, sv2); |
| } |
| |
| public abstract void doSetup(@Named("context") FragmentContext context, @Named("incoming") VectorContainer incoming, @Named("outgoing") RecordBatch outgoing); |
| public abstract int doEval(@Named("leftIndex") int leftIndex, @Named("rightIndex") int rightIndex); |
| |
| @Override |
| public String toString() { |
| return "SortTemplate[vector4=" + vector4 + "]"; |
| } |
| } |