gistfile1.java

    private Tree jobs = null;

    public int loop() {
        if (jobs == null) {
            jobs = new Tree(new Node[]{new Mine(), new Drop()});
        }
        final Node job = jobs.state();
        if (job != null) {
            jobs.set(job);
            getContainer().submit(job);
            job.join();
            return 0;
        }
        return Random.nextInt(200, 300);

    }