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/*-
* See the file LICENSE for redistribution information.
*
* Copyright (c) 2002,2010 Oracle. All rights reserved.
*
* $Id: MiniPerf.java,v 1.23.2.2 2010/01/04 15:30:48 cwl Exp $
*/
package com.sleepycat.je.util;
import java.io.File;
import java.io.IOException;
import com.sleepycat.je.Cursor;
import com.sleepycat.je.Database;
import com.sleepycat.je.DatabaseConfig;
import com.sleepycat.je.DatabaseException;
import com.sleepycat.je.Environment;
import com.sleepycat.je.EnvironmentConfig;
import com.sleepycat.je.LockMode;
import com.sleepycat.je.OperationStatus;
public class MiniPerf {
private File envHome;
private Environment exampleEnv;
private Database exampleDb;
private Cursor cursor;
static int nKeys;
static public void main(String argv[])
throws DatabaseException, IOException, NumberFormatException {
boolean create = false;
if (argv.length > 0) {
nKeys = Integer.parseInt(argv[0]);
create = true;
} else {
create = false;
}
new MiniPerf().doit(create);
}
void doit(boolean create)
throws DatabaseException, IOException {
envHome = new File(System.getProperty(TestUtils.DEST_DIR));
setUp(create);
testIterationPerformance(create);
tearDown();
}
public void setUp(boolean create)
throws IOException, DatabaseException {
if (create) {
TestUtils.removeLogFiles("Setup", envHome, false);
}
// Set up an environment
EnvironmentConfig envConfig = TestUtils.initEnvConfig();
envConfig.setAllowCreate(create);
exampleEnv = new Environment(envHome, envConfig);
// Set up a database
String databaseName = "simpleDb";
DatabaseConfig dbConfig = new DatabaseConfig();
dbConfig.setAllowCreate(true);
exampleDb = exampleEnv.openDatabase(null, databaseName, dbConfig);
// Set up cursors
cursor = exampleDb.openCursor(null, null);
}
public void tearDown()
throws IOException, DatabaseException {
exampleEnv.sync();
if (exampleDb != null) {
exampleDb.close();
exampleDb = null;
}
if (exampleEnv != null) {
try {
exampleEnv.close();
} catch (DatabaseException DE) {
/*
* Ignore this exception. It's caused by us calling
* tearDown() within the test. Each tearDown() call
* forces the database closed. So when the call from
* junit comes along, it's already closed.
*/
}
exampleEnv = null;
}
cursor = null;
}
public void testIterationPerformance(boolean create)
throws IOException, DatabaseException {
final int N_KEY_BYTES = 10;
final int N_DATA_BYTES = 20;
if (create) {
System.out.print("Creating...");
for (int i = 0; i < nKeys; i++) {
if (i % 100000 == 0) {
System.out.println(i);
}
byte[] key = new byte[N_KEY_BYTES];
TestUtils.generateRandomAlphaBytes(key);
String keyString = new String(key);
byte[] data = new byte[N_DATA_BYTES];
TestUtils.generateRandomAlphaBytes(data);
String dataString = new String(data);
cursor.put(new StringDbt(keyString),
new StringDbt(dataString));
}
System.out.print("done.");
} else {
String middleKey = null;
int middleEntry = -1;
int count = 0;
for (int i = 0; i < 3; i++) {
System.out.print("Iterating...");
StringDbt foundKey = new StringDbt();
StringDbt foundData = new StringDbt();
long startTime = System.currentTimeMillis();
OperationStatus status = cursor.getFirst(foundKey, foundData, LockMode.DEFAULT);
count = 0;
while (status == OperationStatus.SUCCESS) {
status =
cursor.getNext(foundKey, foundData, LockMode.DEFAULT);
count++;
if (count == middleEntry) {
middleKey = foundKey.getString();
}
}
long endTime = System.currentTimeMillis();
System.out.println("done.");
System.out.println(count + " records found.");
middleEntry = count >> 1;
System.out.println((endTime - startTime) + " millis");
}
System.out.println("Middle key: " + middleKey);
StringDbt searchKey = new StringDbt(middleKey);
StringDbt searchData = new StringDbt();
for (int j = 0; j < 3; j++) {
long startTime = System.currentTimeMillis();
for (int i = 0; i < count; i++) {
if (cursor.getSearchKey(searchKey,
searchData,
LockMode.DEFAULT) != OperationStatus.SUCCESS) {
System.out.println("non-0 return");
}
}
long endTime = System.currentTimeMillis();
System.out.println((endTime - startTime) + " millis");
}
}
}
}
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