CODEWITHSUNDEEP
javamultithreadingexecutorservicescheduledexecutorservice
Soheil Pourbafrani
Soheil Pourbafrani

Reputation: 3427

Using ScheduledExecutorService method to run a batch of tasks periodically

I want to submit a batch of tasks at once and also execute them periodically. Using ExecutorService object and invokeall method it's possible to run tasks at once. But trying to use scheduleAtFixedRate, it's not compatible:

executor.scheduleAtFixedRate(executor.invokeAll(callables), initialDelay, period, TimeUnit.SECONDS );

How can I execute a batch of tasks at once and periodically?

Upvotes: 0

Views: 409

Answers (1)

Oleg Sklyar
Oleg Sklyar

Reputation: 10072

There is nothing like invokeall, but there is nothing wrong in looping via your runnables as there is also nothing like "at once" in reality:

ScheduledExecutorService pool = Executors.newScheduledThreadPool(10);
for (int i = 0; i < 10; i++) {
    pool.scheduleAtFixedRate(() -> {
        // do some work
    }, 0, 10, TimeUnit.SECONDS);
}

Or if you have a collection of Runnable:

ScheduledExecutorService pool = Executors.newScheduledThreadPool(runnables.size());
runnables.forEach((r) -> pool.scheduleAtFixedRate(r, 0, 10, TimeUnit.SECONDS));

Upvotes: 1

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