/**
* AnalyzerBeans
* Copyright (C) 2014 Neopost - Customer Information Management
*
* This copyrighted material is made available to anyone wishing to use, modify,
* copy, or redistribute it subject to the terms and conditions of the GNU
* Lesser General Public License, as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY
* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License
* for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with this distribution; if not, write to:
* Free Software Foundation, Inc.
* 51 Franklin Street, Fifth Floor
* Boston, MA 02110-1301 USA
*/
package org.eobjects.analyzer.storage;
import java.io.File;
import java.util.ArrayList;
import java.util.Collection;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Set;
import junit.framework.TestCase;
import org.eobjects.analyzer.storage.BerkeleyDbStorageProvider;
import org.eobjects.analyzer.storage.H2StorageProvider;
import org.eobjects.analyzer.storage.HsqldbStorageProvider;
import org.eobjects.analyzer.storage.InMemoryStorageProvider;
import org.eobjects.analyzer.storage.StorageProvider;
import org.junit.Ignore;
/**
* A benchmark program (which is why it is @Ignore'd) used to show the
* difference in performance between the different collection provider
* implementations.
*
*
*/
@Ignore
public class StorageProvidersBenchmarkTest extends TestCase {
private Map<String, StorageProvider> _storageProviders;
@Override
protected void setUp() throws Exception {
super.setUp();
_storageProviders = new HashMap<String, StorageProvider>();
_storageProviders.put("1) In-Memory", new InMemoryStorageProvider());
_storageProviders.put("2) H2", new H2StorageProvider());
_storageProviders.put("3) Hsqldb", new HsqldbStorageProvider());
_storageProviders.put("4) Berkeley DB", new BerkeleyDbStorageProvider(new File("target")));
}
public void testOneBigBatch() throws Exception {
runBenchmarkTests(1, 100000);
}
public void testManyMinorBatches() throws Exception {
runBenchmarkTests(50, 50);
}
private void runBenchmarkTests(int numCollections, int numElems) {
System.out.println(getName() + " beginning.");
System.out.println("(" + numCollections + " collections with " + numElems + " elements in them)");
for (String cpName : _storageProviders.keySet()) {
System.out.println(cpName + " results:");
List<Collection<?>> collections = new ArrayList<Collection<?>>(numCollections);
long timeBefore = System.currentTimeMillis();
StorageProvider cp = _storageProviders.get(cpName);
for (int i = 0; i < numCollections; i++) {
Set<Integer> set = cp.createSet(Integer.class);
for (int j = 0; j < numElems; j++) {
set.add(j);
}
collections.add(set);
}
long timeAfterAdd = System.currentTimeMillis();
System.out.println("- time to add elements: " + (timeAfterAdd - timeBefore));
for (Collection<?> col : collections) {
for (Object object : col) {
object.hashCode();
}
}
long timeAfterIterate = System.currentTimeMillis();
System.out.println("- time to iterate through collection: " + (timeAfterIterate - timeAfterAdd));
collections.clear();
System.gc();
System.runFinalization();
// TODO:check that the collections have actually been cleaned up
long timeAfterCleanup = System.currentTimeMillis();
System.out.println("- TOTAL time: " + (timeAfterCleanup - timeBefore));
}
System.out.println(getName() + " finished.");
}
}