| /* |
| * 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. |
| */ |
| package org.apache.lucene.index; |
| |
| |
| import java.io.IOException; |
| import java.util.concurrent.atomic.AtomicBoolean; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| import org.apache.lucene.analysis.MockAnalyzer; |
| import org.apache.lucene.store.Directory; |
| import org.apache.lucene.util.LineFileDocs; |
| import org.apache.lucene.util.LuceneTestCase; |
| import org.apache.lucene.util.TestUtil; |
| |
| public class TestForceMergeForever extends LuceneTestCase { |
| |
| // Just counts how many merges are done |
| private static class MyIndexWriter extends IndexWriter { |
| |
| AtomicInteger mergeCount = new AtomicInteger(); |
| private boolean first; |
| |
| public MyIndexWriter(Directory dir, IndexWriterConfig conf) throws Exception { |
| super(dir, conf); |
| } |
| |
| @Override |
| protected void merge(MergePolicy.OneMerge merge) throws IOException { |
| if (merge.maxNumSegments != -1 && (first || merge.segments.size() == 1)) { |
| first = false; |
| if (VERBOSE) { |
| System.out.println("TEST: maxNumSegments merge"); |
| } |
| mergeCount.incrementAndGet(); |
| } |
| super.merge(merge); |
| } |
| } |
| |
| public void test() throws Exception { |
| final Directory d = newDirectory(); |
| MockAnalyzer analyzer = new MockAnalyzer(random()); |
| analyzer.setMaxTokenLength(TestUtil.nextInt(random(), 1, IndexWriter.MAX_TERM_LENGTH)); |
| IndexWriterConfig iwc = newIndexWriterConfig(analyzer); |
| // SMS can cause this test to run indefinitely long: |
| iwc.setMergeScheduler(new ConcurrentMergeScheduler()); |
| |
| final MyIndexWriter w = new MyIndexWriter(d, iwc); |
| |
| // Try to make an index that requires merging: |
| w.getConfig().setMaxBufferedDocs(TestUtil.nextInt(random(), 2, 11)); |
| final int numStartDocs = atLeast(20); |
| final LineFileDocs docs = new LineFileDocs(random()); |
| for(int docIDX=0;docIDX<numStartDocs;docIDX++) { |
| w.addDocument(docs.nextDoc()); |
| } |
| MergePolicy mp = w.getConfig().getMergePolicy(); |
| final int mergeAtOnce = 1+w.cloneSegmentInfos().size(); |
| if (mp instanceof TieredMergePolicy) { |
| ((TieredMergePolicy) mp).setMaxMergeAtOnce(mergeAtOnce); |
| } else if (mp instanceof LogMergePolicy) { |
| ((LogMergePolicy) mp).setMergeFactor(mergeAtOnce); |
| } else { |
| // skip test |
| w.close(); |
| d.close(); |
| return; |
| } |
| |
| final AtomicBoolean doStop = new AtomicBoolean(); |
| w.getConfig().setMaxBufferedDocs(2); |
| Thread t = new Thread() { |
| @Override |
| public void run() { |
| try { |
| while (doStop.get() == false) { |
| w.updateDocument(new Term("docid", "" + random().nextInt(numStartDocs)), |
| docs.nextDoc()); |
| // Force deletes to apply |
| w.getReader().close(); |
| } |
| } catch (Throwable t) { |
| throw new RuntimeException(t); |
| } |
| } |
| }; |
| t.start(); |
| w.forceMerge(1); |
| doStop.set(true); |
| t.join(); |
| assertTrue("merge count is " + w.mergeCount.get(), w.mergeCount.get() <= 1); |
| w.close(); |
| d.close(); |
| docs.close(); |
| } |
| } |