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// A threading test for JSwat.
// $Id: thrdtest.java 1113 2004-01-25 22:25:32Z nfiedler $
import java.awt.*;
import java.awt.event.*;
import javax.swing.*;
import javax.swing.event.*;
/**
* Thread test bed.
*
* @author Nathan Fiedler
*/
public class thrdtest implements ActionListener {
/**
* Create the thread test window.
*/
public thrdtest() {
JFrame frame = new JFrame("thread tester");
Container pane = frame.getContentPane();
GridBagLayout gbl = new GridBagLayout();
GridBagConstraints gbc = new GridBagConstraints();
pane.setLayout(gbl);
gbc.insets = new Insets(5, 5, 5, 5);
gbc.fill = GridBagConstraints.HORIZONTAL;
gbc.gridwidth = GridBagConstraints.REMAINDER;
gbc.weightx = 1.0;
JButton button = new JButton("Start 10 threads");
button.setActionCommand("makeTen");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
button = new JButton("Start 'ThrdA' thread");
button.setActionCommand("makeThrdA");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
button = new JButton("Start 'ThrdB' thread");
button.setActionCommand("makeThrdB");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
button = new JButton("Start thread in group");
button.setActionCommand("makeGrpThrd");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
button = new JButton("Start no-name thread");
button.setActionCommand("makeNomanThrd");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
button = new JButton("Start many threads");
button.setActionCommand("makeManyThrds");
button.addActionListener(this);
gbl.setConstraints(button, gbc);
pane.add(button);
// button = new JButton("Stop test");
// button.setActionCommand("stopTest");
// button.addActionListener(this);
// gbl.setConstraints(button, gbc);
// pane.add(button);
frame.addWindowListener(new WindowAdapter() {
public void windowClosing(WindowEvent e) {
System.exit(0);
}
});
frame.pack();
frame.setLocation(100, 100);
frame.setVisible(true);
}
/**
* Invoked when an action occurs.
*
* @param e action event.
*/
public void actionPerformed(ActionEvent e) {
String cmd = e.getActionCommand();
if (cmd.equals("makeTen")) {
// Create 10 threads to run for a while.
for (int i = 0; i < 10; i++) {
Thread th = new Thread(new Sleeper());
th.start();
}
} else if (cmd.equals("makeThrdA")) {
new Thread(new Sleeper(), "ThrdA").start();
} else if (cmd.equals("makeThrdB")) {
new Thread(new Sleeper(), "ThrdB").start();
} else if (cmd.equals("makeNomanThrd")) {
new Thread(new Sleeper(), "").start();
} else if (cmd.equals("makeManyThrds")) {
manyThreads();
} else if (cmd.equals("makeGrpThrd")) {
new Thread(new ThreadGroup("group-1"), new Sleeper(),
"thread-1").start();
// } else if (cmd.equals("stopTest")) {
// Thread th = new Thread(this, "Victim");
// th.start();
// th.stop();
}
}
protected void manyThreads() {
// Spin this off to another thread.
Thread th = new Thread(new Runnable() {
public void run() {
// Spawn a bunch of long-lived threads.
for (int i = 0; i < 200; i++) {
new Thread(new Sleeper(180000, 120000)).start();
}
// Then create short-lived threads frequently.
while (true) {
try {
Thread.sleep(500);
} catch (InterruptedException ie) {
// ignored
}
new Thread(new Sleeper(500, 500)).start();
}
}
});
th.start();
}
public static void main(String[] args) {
new thrdtest();
}
/**
* Sleeps for some amount of time.
*/
protected class Sleeper implements Runnable {
private int base;
private int duration;
public Sleeper() {
// Default to 1 to 20 seconds.
base = 1000;
duration = 19000;
}
public Sleeper(int base, int duration) {
this.base = base;
this.duration = duration;
}
public void run() {
// Pick random time and sleep that long.
long delay = (long) (Math.random() * duration) + base;
try {
Thread.sleep(delay);
} catch (InterruptedException ie) {
// ignored
}
}
}
}
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