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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002,2010 Oracle. All rights reserved.
*
* $Id: FileReaderBufferingTest.java,v 1.18.2.2 2010/01/04 15:30:44 cwl Exp $
*/
package com.sleepycat.je.log;
import java.io.File;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.Iterator;
import junit.framework.TestCase;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.DbInternal;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.config.EnvironmentParams;
import com.sleepycat.je.dbi.EnvironmentImpl;
import com.sleepycat.je.util.TestUtils;
import com.sleepycat.je.utilint.DbLsn;
import com.sleepycat.je.utilint.Tracer;
/**
* Check our ability to adjust the file reader buffer size.
*/
public class FileReaderBufferingTest extends TestCase {
private File envHome;
private Environment env;
private EnvironmentImpl envImpl;
private ArrayList<Long> expectedLsns;
private ArrayList<String> expectedVals;
public FileReaderBufferingTest() {
super();
envHome = new File(System.getProperty(TestUtils.DEST_DIR));
}
public void setUp()
throws IOException, DatabaseException {
TestUtils.removeLogFiles("Setup", envHome, false);
}
public void tearDown()
throws IOException, DatabaseException {
TestUtils.removeFiles("TearDown", envHome, FileManager.JE_SUFFIX);
}
/**
* Should overflow once and then grow.
*/
public void testBasic()
throws Exception {
readLog(1050, // starting size of object in entry
0, // object growth increment
100, // starting read buffer size
"3000", // max read buffer size
0); // expected number of overflows.
}
/**
* Should overflow once and then grow.
*/
public void testCantGrow()
throws Exception {
readLog(2000, // starting size of object in entry
0, // object growth increment
100, // starting read buffer size
"1000", // max read buffer size
10); // expected number of overflows.
}
/**
* Should overflow, grow, and then reach the max.
*/
public void testReachMax()
throws Exception {
readLog(1000, // size of object in entry
1000, // object growth increment
100, // starting read buffer size
"3500", // max read buffer size
7); // expected number of overflows.
}
/**
*
*/
private void readLog(int entrySize,
int entrySizeIncrement,
int readBufferSize,
String bufferMaxSize,
int expectedOverflows)
throws Exception {
try {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setAllowCreate(true);
envConfig.setConfigParam
(EnvironmentParams.LOG_ITERATOR_MAX_SIZE.getName(),
bufferMaxSize);
env = new Environment(envHome, envConfig);
envImpl = DbInternal.envGetEnvironmentImpl(env);
/* Make a log file */
createLogFile(10, entrySize, entrySizeIncrement);
SearchFileReader reader =
new SearchFileReader(envImpl,
readBufferSize,
true,
DbLsn.longToLsn
(expectedLsns.get(0)),
DbLsn.NULL_LSN,
LogEntryType.LOG_TRACE);
Iterator<Long> lsnIter = expectedLsns.iterator();
Iterator<String> valIter = expectedVals.iterator();
while (reader.readNextEntry()) {
Tracer rec = (Tracer)reader.getLastObject();
assertTrue(lsnIter.hasNext());
assertEquals(reader.getLastLsn(),
DbLsn.longToLsn(lsnIter.next()));
assertEquals(valIter.next(), rec.getMessage());
}
assertEquals(10, reader.getNumRead());
assertEquals(expectedOverflows, reader.getNRepeatIteratorReads());
} catch (Exception e) {
e.printStackTrace();
throw e;
} finally {
env.close();
}
}
/**
* Write a logfile of entries, put the entries that we expect to
* read into a list for later verification.
* @return end of file LSN.
*/
private void createLogFile(int numItems, int size, int sizeIncrement)
throws IOException, DatabaseException {
LogManager logManager = envImpl.getLogManager();
expectedLsns = new ArrayList<Long>();
expectedVals = new ArrayList<String>();
for (int i = 0; i < numItems; i++) {
/* Add a debug record just to be filler. */
int recordSize = size + (i * sizeIncrement);
byte[] filler = new byte[recordSize];
Arrays.fill(filler, (byte)i);
String val = new String(filler);
Tracer rec = new Tracer(val);
long lsn = rec.log(logManager);
expectedLsns.add(new Long(lsn));
expectedVals.add(val);
}
logManager.flush();
envImpl.getFileManager().clear();
}
}
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