/*
* Licensed to Elasticsearch under one or more contributor
* license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright
* ownership. Elasticsearch 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.elasticsearch.search.profile.query;
import org.apache.lucene.index.LeafReaderContext;
import org.apache.lucene.search.Collector;
import org.apache.lucene.search.FilterCollector;
import org.apache.lucene.search.FilterLeafCollector;
import org.apache.lucene.search.LeafCollector;
import org.apache.lucene.search.Scorer;
import java.io.IOException;
/** A collector that profiles how much time is spent calling it. */
final class ProfileCollector extends FilterCollector {
private long time;
/** Sole constructor. */
ProfileCollector(Collector in) {
super(in);
}
/** Return the wrapped collector. */
public Collector getDelegate() {
return in;
}
@Override
public boolean needsScores() {
final long start = System.nanoTime();
try {
return super.needsScores();
} finally {
time += Math.max(1, System.nanoTime() - start);
}
}
@Override
public LeafCollector getLeafCollector(LeafReaderContext context) throws IOException {
final long start = System.nanoTime();
final LeafCollector inLeafCollector;
try {
inLeafCollector = super.getLeafCollector(context);
} finally {
time += Math.max(1, System.nanoTime() - start);
}
return new FilterLeafCollector(inLeafCollector) {
@Override
public void collect(int doc) throws IOException {
final long start = System.nanoTime();
try {
super.collect(doc);
} finally {
time += Math.max(1, System.nanoTime() - start);
}
}
@Override
public void setScorer(Scorer scorer) throws IOException {
final long start = System.nanoTime();
try {
super.setScorer(scorer);
} finally {
time += Math.max(1, System.nanoTime() - start);
}
}
};
}
/** Return the total time spent on this collector. */
public long getTime() {
return time;
}
}