package org.apache.lucene.index;
/*
* 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 java.io.IOException;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field.Store;
import org.apache.lucene.document.StringField;
import org.apache.lucene.index.IndexWriterConfig.OpenMode;
import org.apache.lucene.search.IndexSearcher;
import org.apache.lucene.search.ReferenceManager;
import org.apache.lucene.search.SearcherFactory;
import org.apache.lucene.search.SearcherManager;
import org.apache.lucene.search.TermQuery;
import org.apache.lucene.search.TopDocs;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.LuceneTestCase;
public class TestTryDelete extends LuceneTestCase
{
private static IndexWriter getWriter (Directory directory)
throws IOException
{
MergePolicy policy = new LogByteSizeMergePolicy();
IndexWriterConfig conf = new IndexWriterConfig(TEST_VERSION_CURRENT,
new MockAnalyzer(random()));
conf.setMergePolicy(policy);
conf.setOpenMode(OpenMode.CREATE_OR_APPEND);
IndexWriter writer = new IndexWriter(directory, conf);
return writer;
}
private static Directory createIndex ()
throws IOException
{
Directory directory = new RAMDirectory();
IndexWriter writer = getWriter(directory);
for (int i = 0; i < 10; i++) {
Document doc = new Document();
doc.add(new StringField("foo", String.valueOf(i), Store.YES));
writer.addDocument(doc);
}
writer.commit();
writer.close();
return directory;
}
public void testTryDeleteDocument ()
throws IOException
{
Directory directory = createIndex();
IndexWriter writer = getWriter(directory);
ReferenceManager<IndexSearcher> mgr = new SearcherManager(writer,
true,
new SearcherFactory());
TrackingIndexWriter mgrWriter = new TrackingIndexWriter(writer);
IndexSearcher searcher = mgr.acquire();
TopDocs topDocs = searcher.search(new TermQuery(new Term("foo", "0")),
100);
assertEquals(1, topDocs.totalHits);
long result;
if (random().nextBoolean()) {
IndexReader r = DirectoryReader.open(writer, true);
result = mgrWriter.tryDeleteDocument(r, 0);
r.close();
} else {
result = mgrWriter.tryDeleteDocument(searcher.getIndexReader(), 0);
}
// The tryDeleteDocument should have succeeded:
assertTrue(result != -1);
assertTrue(writer.hasDeletions());
if (random().nextBoolean()) {
writer.commit();
}
assertTrue(writer.hasDeletions());
mgr.maybeRefresh();
searcher = mgr.acquire();
topDocs = searcher.search(new TermQuery(new Term("foo", "0")), 100);
assertEquals(0, topDocs.totalHits);
}
public void testTryDeleteDocumentCloseAndReopen ()
throws IOException
{
Directory directory = createIndex();
IndexWriter writer = getWriter(directory);
ReferenceManager<IndexSearcher> mgr = new SearcherManager(writer,
true,
new SearcherFactory());
IndexSearcher searcher = mgr.acquire();
TopDocs topDocs = searcher.search(new TermQuery(new Term("foo", "0")),
100);
assertEquals(1, topDocs.totalHits);
TrackingIndexWriter mgrWriter = new TrackingIndexWriter(writer);
long result = mgrWriter.tryDeleteDocument(DirectoryReader.open(writer,
true), 0);
assertEquals(1, result);
writer.commit();
assertTrue(writer.hasDeletions());
mgr.maybeRefresh();
searcher = mgr.acquire();
topDocs = searcher.search(new TermQuery(new Term("foo", "0")), 100);
assertEquals(0, topDocs.totalHits);
writer.close();
searcher = new IndexSearcher(DirectoryReader.open(directory));
topDocs = searcher.search(new TermQuery(new Term("foo", "0")), 100);
assertEquals(0, topDocs.totalHits);
}
public void testDeleteDocuments ()
throws IOException
{
Directory directory = createIndex();
IndexWriter writer = getWriter(directory);
ReferenceManager<IndexSearcher> mgr = new SearcherManager(writer,
true,
new SearcherFactory());
IndexSearcher searcher = mgr.acquire();
TopDocs topDocs = searcher.search(new TermQuery(new Term("foo", "0")),
100);
assertEquals(1, topDocs.totalHits);
TrackingIndexWriter mgrWriter = new TrackingIndexWriter(writer);
long result = mgrWriter.deleteDocuments(new TermQuery(new Term("foo",
"0")));
assertEquals(1, result);
// writer.commit();
assertTrue(writer.hasDeletions());
mgr.maybeRefresh();
searcher = mgr.acquire();
topDocs = searcher.search(new TermQuery(new Term("foo", "0")), 100);
assertEquals(0, topDocs.totalHits);
}
}