Spring v3.2.2 has added String parameters to the original 3 long parameters to handle this. fixedDelayString, fixedRateString and initialDelayString are now available too. @Scheduled(fixedDelayString = “${my.fixed.delay.prop}”) public void readLog() { … }
You are asking many questions, I’ll try to answer them in a convenient order. First question To be honest, I don’t see any difference between using fork and not using fork. That’s because the example is not a very good one. In your example the parent doesn’t do anything so the fork is useless. Second … Read more
The Go select statement is not biased toward any (ready) cases. Quoting from the spec: If one or more of the communications can proceed, a single one that can proceed is chosen via a uniform pseudo-random selection. Otherwise, if there is a default case, that case is chosen. If there is no default case, the … Read more
I think you should use genetic algorithm because: It is best suited for large problem instances. It yields reduced time complexity on the price of inaccurate answer(Not the ultimate best) You can specify constraints & preferences easily by adjusting fitness punishments for not met ones. You can specify time limit for program execution. The quality … Read more
node-cron does just what I described
tl;dr Any exception escaping your run method halts all further work, without notice. Always use a try-catch within your run method. Try to recover if you want scheduled activity to continue. @Override public void run () { try { doChore(); } catch ( Exception e ) { logger.error( “Caught exception in ScheduledExecutorService. StackTrace:\n” + t.getStackTrace() … Read more
Yes there is. In fact, there are two separate ways to do it 🙂 Right now, the best way to accomplish what you want is to do the following: Add the parameter isolcpus=[cpu_number] to the Linux kernel command line from the boot loader during boot. This will instruct the Linux scheduler not to run any … Read more
Answer Modify your Tuesday cron logic to execute every other week since the epoch. Knowing that there are 604800 seconds in a week (ignoring DST changes and leap seconds, thank you), and using GNU date: 0 6 * * Tue expr `date +\%s` / 604800 \% 2 >/dev/null || /scripts/fortnightly.sh Aside Calendar arithmetic is frustrating. … Read more
An uninterruptible process is a process which happens to be in a system call (kernel function) that cannot be interrupted by a signal. To understand what that means, you need to understand the concept of an interruptible system call. The classic example is read(). This is a system call that can take a long time … Read more
I wouldn’t use Thread.Sleep(). Either use a scheduled task (as others have mentioned), or set up a timer inside your service, which fires periodically (every 10 minutes for example) and check if the date changed since the last run: private Timer _timer; private DateTime _lastRun = DateTime.Now.AddDays(-1); protected override void OnStart(string[] args) { _timer = … Read more