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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002,2010 Oracle. All rights reserved.
*
* $Id: SplitTest.java,v 1.29.2.2 2010/01/04 15:30:48 cwl Exp $
*/
package com.sleepycat.je.tree;
import java.io.File;
import junit.framework.TestCase;
import com.sleepycat.je.Database;
import com.sleepycat.je.DatabaseConfig;
import com.sleepycat.je.DatabaseEntry;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.DbInternal;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.LockMode;
import com.sleepycat.je.OperationStatus;
import com.sleepycat.je.Transaction;
import com.sleepycat.je.config.EnvironmentParams;
import com.sleepycat.je.tree.Key.DumpType;
import com.sleepycat.je.util.TestUtils;
public class SplitTest extends TestCase {
private static final boolean DEBUG = false;
private File envHome;
private Environment env;
private Database db;
public SplitTest() {
envHome = new File(System.getProperty(TestUtils.DEST_DIR));
}
public void setUp()
throws Exception {
TestUtils.removeLogFiles("Setup", envHome, false);
initEnv();
}
public void tearDown()
throws Exception {
try {
db.close();
env.close();
} catch (DatabaseException E) {
}
TestUtils.removeLogFiles("TearDown", envHome, true);
}
private void initEnv()
throws DatabaseException {
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setConfigParam(EnvironmentParams.NODE_MAX.getName(), "4");
envConfig.setTransactional(true);
envConfig.setAllowCreate(true);
env = new Environment(envHome, envConfig);
String databaseName = "testDb";
Transaction txn = env.beginTransaction(null, null);
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setTransactional(true);
dbConfig.setAllowCreate(true);
db = env.openDatabase(txn, databaseName, dbConfig);
txn.commit();
}
/**
* Test splits on a case where the 0th entry gets promoted.
*/
public void test0Split()
throws Exception {
Key.DUMP_TYPE = DumpType.BINARY;
try {
/* Build up a tree. */
for (int i = 160; i > 0; i-= 10) {
assertEquals(OperationStatus.SUCCESS,
db.put(null, new DatabaseEntry
(new byte[] { (byte) i }),
new DatabaseEntry(new byte[] {1})));
}
if (DEBUG) {
System.out.println("<dump>");
DbInternal.dbGetDatabaseImpl(db).getTree().dump();
}
assertEquals(OperationStatus.SUCCESS,
db.put(null, new DatabaseEntry(new byte[]{(byte)151}),
new DatabaseEntry(new byte[] {1})));
assertEquals(OperationStatus.SUCCESS,
db.put(null, new DatabaseEntry(new byte[]{(byte)152}),
new DatabaseEntry(new byte[] {1})));
assertEquals(OperationStatus.SUCCESS,
db.put(null, new DatabaseEntry(new byte[]{(byte)153}),
new DatabaseEntry(new byte[] {1})));
if (DEBUG) {
DbInternal.dbGetDatabaseImpl(db).getTree().dump();
System.out.println("</dump>");
}
/*
* These inserts make a tree where the right most mid-level IN
* has an idkey greater than its parent entry.
*
* +---------------+
* | id = 90 |
* | 50 | 90 | 130 |
* +---------------+
* | | |
* |
* +-----------------+
* | id = 160 |
* | 130 | 150 | 152 |
* +-----------------+
* | | |
* | | +-----------+
* | | |
* +-----------+ +-----------+ +-----------------+
* | BIN | | BIN | | BIN |
* | id = 130 | | id = 150 | | id=160 |
* | 130 | 140 | | 150 | 151 | | 152 | 153 | 160 |
* +-----------+ +-----------+ +-----------------+
*
* Now delete records 130 and 140 to empty out the subtree with BIN
* with id=130.
*/
assertEquals(OperationStatus.SUCCESS,
db.delete(null,
new DatabaseEntry(new byte[]{(byte) 130})));
assertEquals(OperationStatus.SUCCESS,
db.delete(null,
new DatabaseEntry(new byte[]{(byte) 140})));
env.compress();
/*
* These deletes make the mid level IN's 0th entry > its parent
* reference.
*
* +---------------+
* | id = 90 |
* | 50 | 90 | 130 |
* +---------------+
* | | |
* |
* +-----------+
* | id = 160 |
* | 150 | 152 |
* +-----------+
* | |
* | |
* | |
* +-----------+ +-----------------+
* | BIN | | BIN |
* | id = 150 | | id=160 |
* | 150 | 151 | | 152 | 153 | 160 |
* +-----------+ +-----------------+
*
* Now insert 140 into BIN (id = 160) so that its first entry is
* less than the mid level IN.
*/
assertEquals(OperationStatus.SUCCESS,
db.put(null, new DatabaseEntry(new byte[]{(byte)140}),
new DatabaseEntry(new byte[] {1})));
/*
* Now note that the mid level tree's 0th entry is greater than its
* reference in the root.
*
* +---------------+
* | id = 90 |
* | 50 | 90 | 130 |
* +---------------+
* | | |
* |
* +-----------+
* | id = 160 |
* | 150 | 152 |
* +-----------+
* | |
* | |
* | |
* +----------------+ +-----------------+
* | BIN | | BIN |
* | id = 150 | | id=160 |
* | 140 |150 | 151 | | 152 | 153 | 160 |
* +----------------+ +-----------------+
*
* Now split the mid level node, putting the new child on the left.
*/
for (int i = 154; i < 159; i++) {
assertEquals(OperationStatus.SUCCESS,
db.put(null,
new DatabaseEntry(new byte[]{(byte)i}),
new DatabaseEntry(new byte[] {1})));
}
/*
* This used to result in the following broken tree, which would
* cause us to not be able to retrieve record 140. With the new
* split code, entry "150" in the root should stay 130.
*
* +---------------------+
* | id = 90 |
* | 50 | 90 | 150 | 154 | NOTE: we'v lost record 140
* +---------------------+
* | | | \
* | \
* +-----------+ +----------+
* | id = 150 | |id=160 |
* | 150 | 152 | |154 | 156 |
* +-----------+ +----------+
* | |
* | |
* | |
* +------------+ +-------+
* | BIN | | BIN |
* | id = 150 | | id=152|
* | 140|150|151| |152|153|
* +------------+ +-------+
*/
DatabaseEntry data = new DatabaseEntry();
assertEquals(OperationStatus.SUCCESS,
db.get(null, new DatabaseEntry(new byte[]
{ (byte) 140 }),
data, LockMode.DEFAULT));
} catch (Throwable t) {
t.printStackTrace();
throw new Exception(t);
}
}
}
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