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* 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;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.document.StringField;
import org.apache.lucene.index.IndexReader;
import org.apache.lucene.index.NoMergePolicy;
import org.apache.lucene.index.RandomIndexWriter;
import org.apache.lucene.search.LeafCollector;
import org.apache.lucene.search.TotalHitCountCollector;
import org.apache.lucene.store.Directory;
import org.apache.lucene.util.IOUtils;
import org.apache.lucene.util.TestUtil;
import org.elasticsearch.search.query.CancellableCollector;
import org.elasticsearch.tasks.TaskCancelledException;
import org.elasticsearch.test.ESTestCase;
import org.junit.AfterClass;
import org.junit.BeforeClass;
import java.io.IOException;
import java.util.concurrent.atomic.AtomicBoolean;
public class SearchCancellationTests extends ESTestCase {
static Directory dir;
static IndexReader reader;
@BeforeClass
public static void setup() throws IOException {
dir = newDirectory();
RandomIndexWriter w = new RandomIndexWriter(random(), dir);
// we need at least 2 segments - so no merges should be allowed
w.w.getConfig().setMergePolicy(NoMergePolicy.INSTANCE);
w.setDoRandomForceMerge(false);
indexRandomDocuments(w, TestUtil.nextInt(random(), 2, 20));
w.flush();
indexRandomDocuments(w, TestUtil.nextInt(random(), 1, 20));
reader = w.getReader();
w.close();
}
private static void indexRandomDocuments(RandomIndexWriter w, int numDocs) throws IOException {
for (int i = 0; i < numDocs; ++i) {
Document doc = new Document();
doc.add(new StringField("foo", "bar", Field.Store.NO));
w.addDocument(doc);
}
}
@AfterClass
public static void cleanup() throws IOException {
IOUtils.close(reader, dir);
dir = null;
reader = null;
}
public void testLowLevelCancellableCollector() throws IOException {
TotalHitCountCollector collector = new TotalHitCountCollector();
AtomicBoolean cancelled = new AtomicBoolean();
CancellableCollector cancellableCollector = new CancellableCollector(cancelled::get, true, collector);
final LeafCollector leafCollector = cancellableCollector.getLeafCollector(reader.leaves().get(0));
leafCollector.collect(0);
cancelled.set(true);
expectThrows(TaskCancelledException.class, () -> leafCollector.collect(1));
}
public void testCancellableCollector() throws IOException {
TotalHitCountCollector collector = new TotalHitCountCollector();
AtomicBoolean cancelled = new AtomicBoolean();
CancellableCollector cancellableCollector = new CancellableCollector(cancelled::get, false, collector);
final LeafCollector leafCollector = cancellableCollector.getLeafCollector(reader.leaves().get(0));
leafCollector.collect(0);
cancelled.set(true);
leafCollector.collect(1);
expectThrows(TaskCancelledException.class, () -> cancellableCollector.getLeafCollector(reader.leaves().get(1)));
}
}