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/*
* @test
* @run main/manual TestVetoableChangeSupport
* @summary Tests just a benchmark of VetoableChangeSupport performance
* @author Sergey Malenkov
*/
import java.beans.PropertyChangeEvent;
import java.beans.PropertyVetoException;
import java.beans.VetoableChangeListener;
import java.beans.VetoableChangeSupport;
public class TestVetoableChangeSupport implements VetoableChangeListener {
private static final String NAME = "property";
public static void main(String[] args) throws PropertyVetoException {
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) throws PropertyVetoException {
TestVetoableChangeSupport test = new TestVetoableChangeSupport();
VetoableChangeSupport vcs = new VetoableChangeSupport(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++) {
vcs.addVetoableChangeListener(test);
vcs.addVetoableChangeListener(NAME, test);
}
long time2 = System.currentTimeMillis();
for (int i = 0; i < attempts; i++) {
vcs.fireVetoableChange(eventNull);
vcs.fireVetoableChange(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 vetoableChange(PropertyChangeEvent event) {
}
}