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package org.apache.lucene.index;
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* Copyright 2004 The Apache Software Foundation
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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* http://www.apache.org/licenses/LICENSE-2.0
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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import org.apache.lucene.util.*;
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import org.apache.lucene.store.*;
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import org.apache.lucene.document.*;
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import org.apache.lucene.analysis.MockAnalyzer;
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import java.util.Random;
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import java.io.IOException;
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public class TestAtomicUpdate extends LuceneTestCase {
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private static final class MockIndexWriter extends IndexWriter {
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public MockIndexWriter(Directory dir, IndexWriterConfig conf) throws IOException {
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boolean testPoint(String name) {
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// if (name.equals("startCommit")) {
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if (RANDOM.nextInt(4) == 2)
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private static abstract class TimedThread extends Thread {
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volatile boolean failed;
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private static float RUN_TIME_MSEC = atLeast(500);
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private TimedThread[] allThreads;
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abstract public void doWork() throws Throwable;
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TimedThread(TimedThread[] threads) {
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this.allThreads = threads;
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final long stopTime = System.currentTimeMillis() + (long) RUN_TIME_MSEC;
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if (anyErrors()) break;
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} while(System.currentTimeMillis() < stopTime);
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} catch (Throwable e) {
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System.out.println(Thread.currentThread().getName() + ": exc");
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e.printStackTrace(System.out);
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private boolean anyErrors() {
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for(int i=0;i<allThreads.length;i++)
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if (allThreads[i] != null && allThreads[i].failed)
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private static class IndexerThread extends TimedThread {
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public IndexerThread(IndexWriter writer, TimedThread[] threads) {
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public void doWork() throws Exception {
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// Update all 100 docs...
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for(int i=0; i<100; i++) {
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Document d = new Document();
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d.add(new Field("id", Integer.toString(i), Field.Store.YES, Field.Index.NOT_ANALYZED));
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d.add(new Field("contents", English.intToEnglish(i+10*count), Field.Store.NO, Field.Index.ANALYZED));
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writer.updateDocument(new Term("id", Integer.toString(i)), d);
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private static class SearcherThread extends TimedThread {
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private Directory directory;
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public SearcherThread(Directory directory, TimedThread[] threads) {
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this.directory = directory;
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public void doWork() throws Throwable {
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IndexReader r = IndexReader.open(directory, true);
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assertEquals(100, r.numDocs());
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Run one indexer and 2 searchers against single index as
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public void runTest(Directory directory) throws Exception {
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TimedThread[] threads = new TimedThread[4];
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IndexWriterConfig conf = new IndexWriterConfig(
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TEST_VERSION_CURRENT, new MockAnalyzer(random))
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.setMaxBufferedDocs(7);
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((TieredMergePolicy) conf.getMergePolicy()).setMaxMergeAtOnce(3);
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IndexWriter writer = new MockIndexWriter(directory, conf);
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writer.setInfoStream(VERBOSE ? System.out : null);
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// Establish a base index of 100 docs:
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for(int i=0;i<100;i++) {
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Document d = new Document();
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d.add(newField("id", Integer.toString(i), Field.Store.YES, Field.Index.NOT_ANALYZED));
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d.add(newField("contents", English.intToEnglish(i), Field.Store.NO, Field.Index.ANALYZED));
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writer.addDocument(d);
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IndexReader r = IndexReader.open(directory, true);
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assertEquals(100, r.numDocs());
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IndexerThread indexerThread = new IndexerThread(writer, threads);
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threads[0] = indexerThread;
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indexerThread.start();
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IndexerThread indexerThread2 = new IndexerThread(writer, threads);
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threads[1] = indexerThread2;
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indexerThread2.start();
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SearcherThread searcherThread1 = new SearcherThread(directory, threads);
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threads[2] = searcherThread1;
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searcherThread1.start();
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SearcherThread searcherThread2 = new SearcherThread(directory, threads);
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threads[3] = searcherThread2;
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searcherThread2.start();
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indexerThread.join();
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indexerThread2.join();
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searcherThread1.join();
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searcherThread2.join();
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assertTrue("hit unexpected exception in indexer", !indexerThread.failed);
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assertTrue("hit unexpected exception in indexer2", !indexerThread2.failed);
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assertTrue("hit unexpected exception in search1", !searcherThread1.failed);
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assertTrue("hit unexpected exception in search2", !searcherThread2.failed);
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//System.out.println(" Writer: " + indexerThread.count + " iterations");
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//System.out.println("Searcher 1: " + searcherThread1.count + " searchers created");
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//System.out.println("Searcher 2: " + searcherThread2.count + " searchers created");
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Run above stress test against RAMDirectory and then
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public void testAtomicUpdates() throws Exception {
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MockIndexWriter.RANDOM = random;
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// First in a RAM directory:
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directory = new MockDirectoryWrapper(random, new RAMDirectory());
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// Second in an FSDirectory:
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File dirPath = _TestUtil.getTempDir("lucene.test.atomic");
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directory = newFSDirectory(dirPath);
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_TestUtil.rmDir(dirPath);