--- /dev/null
+package org.apache.lucene.search;
+
+/**
+ * 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.
+ */
+
+import org.apache.lucene.index.IndexReader;
+import org.apache.lucene.util.LuceneTestCase;
+
+import java.io.IOException;
+
+public class TestCachingCollector extends LuceneTestCase {
+
+ private static final double ONE_BYTE = 1.0 / (1024 * 1024); // 1 byte out of MB
+
+ private static class MockScorer extends Scorer {
+
+ private MockScorer() {
+ super((Weight) null);
+ }
+
+ @Override
+ public float score() throws IOException { return 0; }
+
+ @Override
+ public int docID() { return 0; }
+
+ @Override
+ public int nextDoc() throws IOException { return 0; }
+
+ @Override
+ public int advance(int target) throws IOException { return 0; }
+
+ }
+
+ private static class NoOpCollector extends Collector {
+
+ private final boolean acceptDocsOutOfOrder;
+
+ public NoOpCollector(boolean acceptDocsOutOfOrder) {
+ this.acceptDocsOutOfOrder = acceptDocsOutOfOrder;
+ }
+
+ @Override
+ public void setScorer(Scorer scorer) throws IOException {}
+
+ @Override
+ public void collect(int doc) throws IOException {}
+
+ @Override
+ public void setNextReader(IndexReader reader, int docBase) throws IOException {}
+
+ @Override
+ public boolean acceptsDocsOutOfOrder() {
+ return acceptDocsOutOfOrder;
+ }
+
+ }
+
+ public void testBasic() throws Exception {
+ for (boolean cacheScores : new boolean[] { false, true }) {
+ CachingCollector cc = CachingCollector.create(new NoOpCollector(false), cacheScores, 1.0);
+ cc.setScorer(new MockScorer());
+
+ // collect 1000 docs
+ for (int i = 0; i < 1000; i++) {
+ cc.collect(i);
+ }
+
+ // now replay them
+ cc.replay(new Collector() {
+ int prevDocID = -1;
+
+ @Override
+ public void setScorer(Scorer scorer) throws IOException {}
+
+ @Override
+ public void setNextReader(IndexReader reader, int docBase) throws IOException {}
+
+ @Override
+ public void collect(int doc) throws IOException {
+ assertEquals(prevDocID + 1, doc);
+ prevDocID = doc;
+ }
+
+ @Override
+ public boolean acceptsDocsOutOfOrder() {
+ return false;
+ }
+ });
+ }
+ }
+
+ public void testIllegalStateOnReplay() throws Exception {
+ CachingCollector cc = CachingCollector.create(new NoOpCollector(false), true, 50 * ONE_BYTE);
+ cc.setScorer(new MockScorer());
+
+ // collect 130 docs, this should be enough for triggering cache abort.
+ for (int i = 0; i < 130; i++) {
+ cc.collect(i);
+ }
+
+ assertFalse("CachingCollector should not be cached due to low memory limit", cc.isCached());
+
+ try {
+ cc.replay(new NoOpCollector(false));
+ fail("replay should fail if CachingCollector is not cached");
+ } catch (IllegalStateException e) {
+ // expected
+ }
+ }
+
+ public void testIllegalCollectorOnReplay() throws Exception {
+ // tests that the Collector passed to replay() has an out-of-order mode that
+ // is valid with the Collector passed to the ctor
+
+ // 'src' Collector does not support out-of-order
+ CachingCollector cc = CachingCollector.create(new NoOpCollector(false), true, 50 * ONE_BYTE);
+ cc.setScorer(new MockScorer());
+ for (int i = 0; i < 10; i++) cc.collect(i);
+ cc.replay(new NoOpCollector(true)); // this call should not fail
+ cc.replay(new NoOpCollector(false)); // this call should not fail
+
+ // 'src' Collector supports out-of-order
+ cc = CachingCollector.create(new NoOpCollector(true), true, 50 * ONE_BYTE);
+ cc.setScorer(new MockScorer());
+ for (int i = 0; i < 10; i++) cc.collect(i);
+ cc.replay(new NoOpCollector(true)); // this call should not fail
+ try {
+ cc.replay(new NoOpCollector(false)); // this call should fail
+ fail("should have failed if an in-order Collector was given to replay(), " +
+ "while CachingCollector was initialized with out-of-order collection");
+ } catch (IllegalArgumentException e) {
+ // ok
+ }
+ }
+
+ public void testCachedArraysAllocation() throws Exception {
+ // tests the cached arrays allocation -- if the 'nextLength' was too high,
+ // caching would terminate even if a smaller length would suffice.
+
+ // set RAM limit enough for 150 docs + random(10000)
+ int numDocs = random.nextInt(10000) + 150;
+ for (boolean cacheScores : new boolean[] { false, true }) {
+ int bytesPerDoc = cacheScores ? 8 : 4;
+ CachingCollector cc = CachingCollector.create(new NoOpCollector(false),
+ cacheScores, bytesPerDoc * ONE_BYTE * numDocs);
+ cc.setScorer(new MockScorer());
+ for (int i = 0; i < numDocs; i++) cc.collect(i);
+ assertTrue(cc.isCached());
+
+ // The 151's document should terminate caching
+ cc.collect(numDocs);
+ assertFalse(cc.isCached());
+ }
+ }
+
+ public void testNoWrappedCollector() throws Exception {
+ for (boolean cacheScores : new boolean[] { false, true }) {
+ // create w/ null wrapped collector, and test that the methods work
+ CachingCollector cc = CachingCollector.create(true, cacheScores, 50 * ONE_BYTE);
+ cc.setNextReader(null, 0);
+ cc.setScorer(new MockScorer());
+ cc.collect(0);
+
+ assertTrue(cc.isCached());
+ cc.replay(new NoOpCollector(true));
+ }
+ }
+
+}
fnp / pylucene.git / blobdiff