Triggering a Java program based on database updates and time interval

Question

I want a mechanism that will start a java program ( quite a big one ) depending on 2 conditions:

1. N new inserts in a MySQL table
2. Every 5 minutes interv

Answer 1

It is actually not that big using a ScheduledExecutorService:

private static final Runnable PROGRAM_RUNNABLE =  new Runnable() {
    @Override
    public void run() {
        // run the program
    }
}

private ScheduledExecutorService ses = Executors.newScheduledThreadPool(2);

public static void main(String[] args) {
    // database based
    ses.scheduleAtFixedRate(new Runnable() {
        @Override
        public void run() {
            boolean inserted = checkDatabase(); // check the insert in the db
            if(inserted) {
                PROGRAM_RUNNABLE.run();
            }
        }
    }, 0, 1, TimeUnit.MINUTES);

    // time based
    ses.scheduleAtFixedRate(PROGRAM_RUNNABLE, 5, 5, TimeUnit.MINUTES);
}