Await

scala.concurrent.Await$
object Await

Await is what is used to ensure proper handling of blocking for Awaitable instances.

While occasionally useful, e.g. for testing, it is recommended that you avoid Await whenever possible— instead favoring combinators and/or callbacks. Await's result and ready methods will block the calling thread's execution until they return, which will cause performance degradation, and possibly, deadlock issues.

Attributes

Source:
package.scala
Graph
Supertypes
class Object
trait Matchable
class Any
Self type
Await.type

Members list

Concise view

Value members

Concrete methods

final def ready[T](awaitable: Awaitable[T], atMost: Duration): Awaitable[T]

Await the "completed" state of an Awaitable.

Await the "completed" state of an Awaitable.

Although this method is blocking, the internal use of blocking ensures that the underlying ExecutionContext is given an opportunity to properly manage the blocking.

WARNING: It is strongly discouraged to supply lengthy timeouts since the progress of the calling thread will be suspended—blocked—until either the Awaitable becomes ready or the timeout expires.

Attributes

atMost

maximum wait time, which may be negative (no waiting is done), Duration.Inf for unbounded waiting, or a finite positive duration

awaitable

the Awaitable to be awaited

Returns:

the awaitable

Throws:

InterruptedException if the current thread is interrupted while waiting

TimeoutException if after waiting for the specified time this Awaitable is still not ready

Source:
package.scala
final def result[T](awaitable: Awaitable[T], atMost: Duration): T

Await and return the result (of type T) of an Awaitable.

Await and return the result (of type T) of an Awaitable.

Although this method is blocking, the internal use of blocking ensures that the underlying ExecutionContext is given an opportunity to properly manage the blocking.

WARNING: It is strongly discouraged to supply lengthy timeouts since the progress of the calling thread will be suspended—blocked—until either the Awaitable has a result or the timeout expires.

Attributes

atMost

maximum wait time, which may be negative (no waiting is done), Duration.Inf for unbounded waiting, or a finite positive duration

awaitable

the Awaitable to be awaited

Returns:

the result value if awaitable is completed within the specific maximum wait time

Throws:

InterruptedException if the current thread is interrupted while waiting

TimeoutException if after waiting for the specified time awaitable is still not ready

Source:
package.scala