Scheduler

Returns the current time in milliseconds. Note that while the unit of time of the return value is a millisecond, the granularity of the value depends on the underlying operating system and may be larger. For example, many operating systems measure time in units of tens of milliseconds.

It's the equivalent of System.currentTimeMillis(). When wanting to measure time, do not use System.currentTimeMillis() directly, prefer this method instead, because then it can be mocked for testing purposes (see for example TestScheduler)

Schedules the given action for immediate execution.

Runs a block of code in this ExecutionContext.

Reports that an asynchronous computation failed.

Schedules a periodic task that becomes enabled first after the given initial delay, and subsequently with the given period. Executions will commence after initialDelay then initialDelay + period, then initialDelay + 2 * period and so on.

If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the scheduler. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

For example the following schedules a message to be printed to standard output approximately every 10 seconds with an initial delay of 5 seconds:

val task = scheduler.scheduleAtFixedRate(5.seconds, 10.seconds) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules a periodic task that becomes enabled first after the given initial delay, and subsequently with the given period. Executions will commence after initialDelay then initialDelay + period, then initialDelay + 2 * period and so on.

If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the scheduler. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

For example the following schedules a message to be printed to standard output approximately every 10 seconds with an initial delay of 5 seconds:

val task = scheduler.scheduleAtFixedRate(5.seconds, 10.seconds) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules a periodic task that becomes enabled first after the given initial delay, and subsequently with the given period. Executions will commence after initialDelay then initialDelay + period, then initialDelay + 2 * period and so on.

If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the scheduler. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

For example the following schedules a message to be printed to standard output approximately every 10 seconds with an initial delay of 5 seconds:

val task = scheduler.scheduleAtFixedRate(5.seconds, 10.seconds , new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()

Schedules a periodic task that becomes enabled first after the given initial delay, and subsequently with the given period. Executions will commence after initialDelay then initialDelay + period, then initialDelay + 2 * period and so on.

If any execution of the task encounters an exception, subsequent executions are suppressed. Otherwise, the task will only terminate via cancellation or termination of the scheduler. If any execution of this task takes longer than its period, then subsequent executions may start late, but will not concurrently execute.

For example the following schedules a message to be printed to standard output approximately every 10 seconds with an initial delay of 5 seconds:

val task = scheduler.scheduleAtFixedRate(5.seconds, 10.seconds , new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()

Schedules a task to run in the future, after initialDelay.

For example the following schedules a message to be printed to standard output after 5 minutes:

val task = scheduler.scheduleOnce(5.minutes, new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()

Schedules a task to run in the future, after initialDelay.

For example the following schedules a message to be printed to standard output after 5 minutes:

val task = scheduler.scheduleOnce(5.minutes, new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()

Schedules a task to run in the future, after initialDelay.

For example the following schedules a message to be printed to standard output after 5 minutes:

val task = scheduler.scheduleOnce(5.minutes) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules a task to run in the future, after initialDelay.

For example the following schedules a message to be printed to standard output after 5 minutes:

val task = scheduler.scheduleOnce(5.minutes) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules for execution a periodic task that is first executed after the given initial delay and subsequently with the given delay between the termination of one execution and the commencement of the next.

For example the following schedules a message to be printed to standard output every 10 seconds with an initial delay of 5 seconds:

val task = s.scheduleWithFixedDelay(5.seconds, 10.seconds) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules for execution a periodic task that is first executed after the given initial delay and subsequently with the given delay between the termination of one execution and the commencement of the next.

For example the following schedules a message to be printed to standard output every 10 seconds with an initial delay of 5 seconds:

val task = s.scheduleWithFixedDelay(5.seconds, 10.seconds) {
  println("Hello, world!")
}

// later if you change your mind ...
task.cancel()

Schedules for execution a periodic task that is first executed after the given initial delay and subsequently with the given delay between the termination of one execution and the commencement of the next.

For example the following schedules a message to be printed to standard output every 10 seconds with an initial delay of 5 seconds:

val task = s.scheduleWithFixedDelay(5.seconds, 10.seconds, new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()

Schedules for execution a periodic task that is first executed after the given initial delay and subsequently with the given delay between the termination of one execution and the commencement of the next.

For example the following schedules a message to be printed to standard output every 10 seconds with an initial delay of 5 seconds:

val task = s.scheduleWithFixedDelay(5.seconds, 10.seconds, new Runnable {
  def run() = println("Hello, world!")
})

// later if you change your mind ...
task.cancel()