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 java.util.Random;
import org.apache.lucene.analysis.MockAnalyzer;
import org.apache.lucene.document.Document;
import org.apache.lucene.document.Field;
import org.apache.lucene.store.Directory;
import org.apache.lucene.store.MockDirectoryWrapper;
import org.apache.lucene.store.RAMDirectory;
import org.apache.lucene.util.English;
import org.apache.lucene.util.LuceneTestCase;
import org.apache.lucene.util._TestUtil;
public class TestTransactions extends LuceneTestCase {
private Random RANDOM;
private static volatile boolean doFail;
private class RandomFailure extends MockDirectoryWrapper.Failure {
@Override
public void eval(MockDirectoryWrapper dir) throws IOException {
if (TestTransactions.doFail && RANDOM.nextInt() % 10 <= 3)
throw new IOException("now failing randomly but on purpose");
}
}
private static abstract class TimedThread extends Thread {
volatile boolean failed;
private static float RUN_TIME_SEC = 0.5f * RANDOM_MULTIPLIER;
private TimedThread[] allThreads;
abstract public void doWork() throws Throwable;
TimedThread(TimedThread[] threads) {
this.allThreads = threads;
}
@Override
public void run() {
final long stopTime = System.currentTimeMillis() + (long) (1000*RUN_TIME_SEC);
try {
do {
if (anyErrors()) break;
doWork();
} while (System.currentTimeMillis() < stopTime);
} catch (Throwable e) {
System.out.println(Thread.currentThread() + ": exc");
e.printStackTrace(System.out);
failed = true;
}
}
private boolean anyErrors() {
for(int i=0;i<allThreads.length;i++)
if (allThreads[i] != null && allThreads[i].failed)
return true;
return false;
}
}
private class IndexerThread extends TimedThread {
Directory dir1;
Directory dir2;
Object lock;
int nextID;
public IndexerThread(Object lock, Directory dir1, Directory dir2, TimedThread[] threads) {
super(threads);
this.lock = lock;
this.dir1 = dir1;
this.dir2 = dir2;
}
@Override
public void doWork() throws Throwable {
IndexWriter writer1 = new IndexWriter(dir1, newIndexWriterConfig(RANDOM, TEST_VERSION_CURRENT, new MockAnalyzer())
.setMaxBufferedDocs(3).setMergeScheduler(new ConcurrentMergeScheduler()));
((LogMergePolicy) writer1.getConfig().getMergePolicy()).setMergeFactor(2);
((ConcurrentMergeScheduler) writer1.getConfig().getMergeScheduler()).setSuppressExceptions();
// Intentionally use different params so flush/merge
// happen @ different times
IndexWriter writer2 = new IndexWriter(dir2, newIndexWriterConfig(RANDOM, TEST_VERSION_CURRENT, new MockAnalyzer())
.setMaxBufferedDocs(2).setMergeScheduler(new ConcurrentMergeScheduler()));
((LogMergePolicy) writer2.getConfig().getMergePolicy()).setMergeFactor(3);
((ConcurrentMergeScheduler) writer2.getConfig().getMergeScheduler()).setSuppressExceptions();
update(writer1);
update(writer2);
TestTransactions.doFail = true;
try {
synchronized(lock) {
try {
writer1.prepareCommit();
} catch (Throwable t) {
writer1.rollback();
writer2.rollback();
return;
}
try {
writer2.prepareCommit();
} catch (Throwable t) {
writer1.rollback();
writer2.rollback();
return;
}
writer1.commit();
writer2.commit();
}
} finally {
TestTransactions.doFail = false;
}
writer1.close();
writer2.close();
}
public void update(IndexWriter writer) throws IOException {
// Add 10 docs:
for(int j=0; j<10; j++) {
Document d = new Document();
int n = RANDOM.nextInt();
d.add(new Field("id", Integer.toString(nextID++), Field.Store.YES, Field.Index.NOT_ANALYZED));
d.add(new Field("contents", English.intToEnglish(n), Field.Store.NO, Field.Index.ANALYZED));
writer.addDocument(d);
}
// Delete 5 docs:
int deleteID = nextID-1;
for(int j=0; j<5; j++) {
writer.deleteDocuments(new Term("id", ""+deleteID));
deleteID -= 2;
}
}
}
private static class SearcherThread extends TimedThread {
Directory dir1;
Directory dir2;
Object lock;
public SearcherThread(Object lock, Directory dir1, Directory dir2, TimedThread[] threads) {
super(threads);
this.lock = lock;
this.dir1 = dir1;
this.dir2 = dir2;
}
@Override
public void doWork() throws Throwable {
IndexReader r1, r2;
synchronized(lock) {
r1 = IndexReader.open(dir1, true);
r2 = IndexReader.open(dir2, true);
}
if (r1.numDocs() != r2.numDocs())
throw new RuntimeException("doc counts differ: r1=" + r1.numDocs() + " r2=" + r2.numDocs());
r1.close();
r2.close();
}
}
public void initIndex(Directory dir) throws Throwable {
IndexWriter writer = new IndexWriter(dir, newIndexWriterConfig(RANDOM, TEST_VERSION_CURRENT, new MockAnalyzer()));
for(int j=0; j<7; j++) {
Document d = new Document();
int n = RANDOM.nextInt();
d.add(new Field("contents", English.intToEnglish(n), Field.Store.NO, Field.Index.ANALYZED));
writer.addDocument(d);
}
writer.close();
}
public void testTransactions() throws Throwable {
RANDOM = newRandom();
// we cant use non-ramdir on windows, because this test needs to double-write.
MockDirectoryWrapper dir1 = new MockDirectoryWrapper(new RAMDirectory());
MockDirectoryWrapper dir2 = new MockDirectoryWrapper(new RAMDirectory());
dir1.setPreventDoubleWrite(false);
dir2.setPreventDoubleWrite(false);
dir1.failOn(new RandomFailure());
dir2.failOn(new RandomFailure());
initIndex(dir1);
initIndex(dir2);
TimedThread[] threads = new TimedThread[3];
int numThread = 0;
IndexerThread indexerThread = new IndexerThread(this, dir1, dir2, threads);
threads[numThread++] = indexerThread;
indexerThread.start();
SearcherThread searcherThread1 = new SearcherThread(this, dir1, dir2, threads);
threads[numThread++] = searcherThread1;
searcherThread1.start();
SearcherThread searcherThread2 = new SearcherThread(this, dir1, dir2, threads);
threads[numThread++] = searcherThread2;
searcherThread2.start();
for(int i=0;i<numThread;i++)
threads[i].join();
for(int i=0;i<numThread;i++)
assertTrue(!threads[i].failed);
dir1.close();
dir2.close();
}
}