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/*
* Copyright (c) 2007, Oracle and/or its affiliates. All rights reserved.
* DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
*
* This code is free software; you can redistribute it and/or modify it
* under the terms of the GNU General Public License version 2 only, as
* published by the Free Software Foundation.
*
* This code 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 General Public License
* version 2 for more details (a copy is included in the LICENSE file that
* accompanied this code).
*
* You should have received a copy of the GNU General Public License version
* 2 along with this work; if not, write to the Free Software Foundation,
* Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
*
* Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
* or visit www.oracle.com if you need additional information or have any
* questions.
*/
/*
* @test
* @run main/manual TestPropertyChangeSupport
* @summary Tests just a benchmark of PropertyChangeSupport performance
* @author Sergey Malenkov
*/
import java.beans.PropertyChangeEvent;
import java.beans.PropertyChangeListener;
import java.beans.PropertyChangeSupport;
public class TestPropertyChangeSupport implements PropertyChangeListener {
private static final String NAME = "property";
public static void main(String[] args) {
for (int i = 1; i <= 3; i++) {
test(i, 1, 10000000);
test(i, 10, 1000000);
test(i, 100, 100000);
test(i, 1000, 10000);
test(i, 10000, 1000);
test(i, 20000, 1000);
}
}
private static void test(int step, int listeners, int attempts) {
TestPropertyChangeSupport test = new TestPropertyChangeSupport();
PropertyChangeSupport pcs = new PropertyChangeSupport(test);
PropertyChangeEvent eventNull = new PropertyChangeEvent(test, null, null, null);
PropertyChangeEvent eventName = new PropertyChangeEvent(test, NAME, null, null);
long time1 = System.currentTimeMillis();
for (int i = 0; i < listeners; i++) {
pcs.addPropertyChangeListener(test);
pcs.addPropertyChangeListener(NAME, test);
}
long time2 = System.currentTimeMillis();
for (int i = 0; i < attempts; i++) {
pcs.firePropertyChange(eventNull);
pcs.firePropertyChange(eventName);
}
long time3 = System.currentTimeMillis();
time1 = time2 - time1; // time of adding the listeners
time2 = time3 - time2; // time of firing the events
System.out.println("Step: " + step
+ "; Listeners: " + listeners
+ "; Attempts: " + attempts
+ "; Time (ms): " + time1 + "/" + time2);
}
public void propertyChange(PropertyChangeEvent event) {
}
}
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