--- /dev/null
+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.File;
+import java.util.HashSet;
+import java.util.Set;
+
+import org.apache.lucene.analysis.MockAnalyzer;
+import org.apache.lucene.document.Document;
+import org.apache.lucene.document.Field;
+import org.apache.lucene.store.MockDirectoryWrapper;
+import org.apache.lucene.util.LuceneTestCase;
+import org.apache.lucene.util._TestUtil;
+
+// Make sure if you use NoDeletionPolicy that no file
+// referenced by a commit point is ever deleted
+
+public class TestNeverDelete extends LuceneTestCase {
+
+ public void testIndexing() throws Exception {
+ final File tmpDir = _TestUtil.getTempDir("TestNeverDelete");
+ final MockDirectoryWrapper d = newFSDirectory(tmpDir);
+
+ // We want to "see" files removed if Lucene removed
+ // them. This is still worth running on Windows since
+ // some files the IR opens and closes.
+ d.setNoDeleteOpenFile(false);
+ final RandomIndexWriter w = new RandomIndexWriter(random,
+ d,
+ newIndexWriterConfig(TEST_VERSION_CURRENT,
+ new MockAnalyzer(random))
+ .setIndexDeletionPolicy(NoDeletionPolicy.INSTANCE));
+ w.w.getConfig().setMaxBufferedDocs(_TestUtil.nextInt(random, 5, 30));
+
+ w.w.setInfoStream(VERBOSE ? System.out : null);
+ w.commit();
+ Thread[] indexThreads = new Thread[random.nextInt(4)];
+ final long stopTime = System.currentTimeMillis() + atLeast(1000);
+ for (int x=0; x < indexThreads.length; x++) {
+ indexThreads[x] = new Thread() {
+ @Override
+ public void run() {
+ try {
+ int docCount = 0;
+ while (System.currentTimeMillis() < stopTime) {
+ final Document doc = new Document();
+ doc.add(newField("dc", ""+docCount, Field.Store.YES, Field.Index.NOT_ANALYZED));
+ doc.add(newField("field", "here is some text", Field.Store.YES, Field.Index.ANALYZED));
+ w.addDocument(doc);
+
+ if (docCount % 13 == 0) {
+ w.commit();
+ }
+ docCount++;
+ }
+ } catch (Exception e) {
+ throw new RuntimeException(e);
+ }
+ }
+ };
+ indexThreads[x].setName("Thread " + x);
+ indexThreads[x].start();
+ }
+
+ final Set<String> allFiles = new HashSet<String>();
+
+ IndexReader r = IndexReader.open(d);
+ while(System.currentTimeMillis() < stopTime) {
+ final IndexCommit ic = r.getIndexCommit();
+ if (VERBOSE) {
+ System.out.println("TEST: check files: " + ic.getFileNames());
+ }
+ allFiles.addAll(ic.getFileNames());
+ // Make sure no old files were removed
+ for(String fileName : allFiles) {
+ assertTrue("file " + fileName + " does not exist", d.fileExists(fileName));
+ }
+ IndexReader r2 = IndexReader.openIfChanged(r);
+ if (r2 != null) {
+ r.close();
+ r = r2;
+ }
+ Thread.sleep(1);
+ }
+ r.close();
+
+ for(Thread t : indexThreads) {
+ t.join();
+ }
+ w.close();
+ d.close();
+
+ _TestUtil.rmDir(tmpDir);
+ }
+}