I’m on Twitter now

I finally gave up on trying to resist. Curiosity was stronger… so now you can read my tweets at http://twitter.com/amuino

Deadlock quiz… the answer

If you have not yet read it, lets go and check the piece of code causing a deadlock.

In order to not spoling the fun, I’m providing the answer in the full post.

Deadlock quiz

Suppose you have this class:

public class Singleton implements Runnable {
	public static final String A_STRING = "Hello World".toLowerCase();

	public static final Singleton INSTANCE = new Singleton();

	public static Singleton getInstance() {
		return INSTANCE;
	}

	private Singleton() {
		super();
		launchThread();
	}

	public void launchThread() {
		synchronized (this) {
			Thread t = new Thread(this);
			t.start();
			while (t.isAlive()) {
				try {
					wait(100);
				} catch (InterruptedException e) {
					// Interrupted.
				}
			}
		}
	}

	public void run() {
		System.out.println(A_STRING);
	}

	public static void main(String[] args) {
		Singleton.getInstance();
	}
}

If you run the main method, it hangs in a deadlock. Can you see the reason?

Developers, classifed

I’ve come across this interesting classification of developer types, by Frank Kelly.

It is a funny read… just try to assign a label to your workmates… and think which label they’ll apply to you :-).

Comming back

I’m just back from my easter break and catching up with all q4e-related mail and issues… there has been lots of work and contributions, which means a lot of work for us (the committers) but also means a healthy community.

Thanks to everyone who’s been hacking at Q for Eclipse this weekend and in the past.

You rock!