| /* |
| * 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.lucene.sandbox.search; |
| |
| import java.io.IOException; |
| import java.util.ArrayList; |
| import java.util.List; |
| import org.apache.lucene.index.LeafReaderContext; |
| import org.apache.lucene.search.Collector; |
| import org.apache.lucene.search.LeafCollector; |
| import org.apache.lucene.search.ScoreMode; |
| |
| /** |
| * This class wraps a Collector and times the execution of: - setScorer() - collect() - |
| * doSetNextReader() - needsScores() |
| * |
| * <p>QueryProfiler facilitates the linking of the Collector graph |
| */ |
| public class ProfilerCollector implements Collector { |
| |
| /** A more friendly representation of the Collector's class name */ |
| private final String collectorName; |
| |
| /** A "hint" to help provide some context about this Collector */ |
| private final String reason; |
| |
| /** The wrapped collector */ |
| private final ProfilerCollectorWrapper collector; |
| |
| /** A list of "embedded" children collectors */ |
| private final List<ProfilerCollector> children; |
| |
| public ProfilerCollector(Collector collector, String reason, List<ProfilerCollector> children) { |
| this.collector = new ProfilerCollectorWrapper(collector); |
| this.reason = reason; |
| this.collectorName = deriveCollectorName(collector); |
| this.children = children; |
| } |
| |
| /** @return the profiled time for this collector (inclusive of children) */ |
| public long getTime() { |
| return collector.getTime(); |
| } |
| |
| /** @return a human readable "hint" about what this collector was used for */ |
| public String getReason() { |
| return this.reason; |
| } |
| |
| /** @return the lucene class name of the collector */ |
| public String getName() { |
| return this.collectorName; |
| } |
| |
| /** |
| * Creates a human-friendly representation of the Collector name. |
| * |
| * @param c The Collector to derive a name from |
| * @return A (hopefully) prettier name |
| */ |
| private String deriveCollectorName(Collector c) { |
| return c.getClass().getSimpleName(); |
| } |
| |
| @Override |
| public LeafCollector getLeafCollector(LeafReaderContext context) throws IOException { |
| return collector.getLeafCollector(context); |
| } |
| |
| @Override |
| public ScoreMode scoreMode() { |
| return collector.scoreMode(); |
| } |
| |
| public ProfilerCollectorResult getProfileResult() { |
| return ProfilerCollector.doGetCollectorTree(this); |
| } |
| |
| private static ProfilerCollectorResult doGetCollectorTree(ProfilerCollector collector) { |
| List<ProfilerCollectorResult> childResults = new ArrayList<>(collector.children.size()); |
| for (ProfilerCollector child : collector.children) { |
| ProfilerCollectorResult result = doGetCollectorTree(child); |
| childResults.add(result); |
| } |
| return new ProfilerCollectorResult( |
| collector.getName(), collector.getReason(), collector.getTime(), childResults); |
| } |
| } |