| /* |
| * 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.List; |
| import org.apache.lucene.index.IndexReader; |
| import org.apache.lucene.search.IndexSearcher; |
| import org.apache.lucene.search.Query; |
| import org.apache.lucene.search.ScoreMode; |
| import org.apache.lucene.search.Weight; |
| |
| /** |
| * An extension of {@link IndexSearcher} that records profile information for all queries it |
| * executes. |
| */ |
| public class QueryProfilerIndexSearcher extends IndexSearcher { |
| |
| private final QueryProfilerTree profiler; |
| |
| public QueryProfilerIndexSearcher(IndexReader reader) { |
| super(reader); |
| profiler = new QueryProfilerTree(); |
| } |
| |
| @Override |
| public Query rewrite(Query original) throws IOException { |
| profiler.startRewriteTime(); |
| try { |
| return super.rewrite(original); |
| } finally { |
| profiler.stopAndAddRewriteTime(); |
| } |
| } |
| |
| @Override |
| public Weight createWeight(Query query, ScoreMode scoreMode, float boost) throws IOException { |
| // createWeight() is called for each query in the tree, so we tell the queryProfiler |
| // each invocation so that it can build an internal representation of the query |
| // tree |
| QueryProfilerBreakdown profile = profiler.getProfileBreakdown(query); |
| QueryProfilerTimer timer = profile.getTimer(QueryProfilerTimingType.CREATE_WEIGHT); |
| timer.start(); |
| final Weight weight; |
| try { |
| weight = query.createWeight(this, scoreMode, boost); |
| } finally { |
| timer.stop(); |
| profiler.pollLast(); |
| } |
| return new QueryProfilerWeight(query, weight, profile); |
| } |
| |
| /** @return total time taken to rewrite all queries in this profile */ |
| public long getRewriteTime() { |
| return profiler.getRewriteTime(); |
| } |
| |
| /** @return a hierarchical representation of the profiled tree */ |
| public List<QueryProfilerResult> getProfileResult() { |
| return profiler.getTree(); |
| } |
| } |