scala

concurrent

package concurrent

This package object contains primitives for concurrent and parallel programming.

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package.scala
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Type Members

  1. trait Awaitable[+T] extends AnyRef

    An object that may eventually be completed with a result value of type T which may be awaited using blocking methods.

  2. trait BlockContext extends AnyRef

    A context to be notified by scala.concurrent.blocking when a thread is about to block.

  3. sealed trait CanAwait extends AnyRef

    Annotations
    @implicitNotFound( msg = ... )
  4. type CancellationException = java.util.concurrent.CancellationException

  5. class Channel[A] extends AnyRef

    This class .

  6. class DelayedLazyVal[T] extends AnyRef

    A DelayedLazyVal is a wrapper for lengthy computations which have a valid partially computed result.

  7. trait ExecutionContext extends AnyRef

    An ExecutionContext is an abstraction over an entity that can execute program logic.

  8. trait ExecutionContextExecutor extends ExecutionContext with Executor

    Union interface since Java does not support union types

  9. trait ExecutionContextExecutorService extends ExecutionContextExecutor with ExecutorService

    Union interface since Java does not support union types

  10. type ExecutionException = java.util.concurrent.ExecutionException

  11. trait Future[+T] extends Awaitable[T]

    The trait that represents futures.

  12. class Lock extends AnyRef

    This class .

  13. trait OnCompleteRunnable extends AnyRef

    A marker indicating that a java.lang.Runnable provided to scala.concurrent.ExecutionContext wraps a callback provided to Future.onComplete.

  14. trait Promise[T] extends AnyRef

    Promise is an object which can be completed with a value or failed with an exception.

  15. class SyncChannel[A] extends AnyRef

    A SyncChannel allows one to exchange data synchronously between a reader and a writer thread.

  16. class SyncVar[A] extends AnyRef

    A class to provide safe concurrent access to a mutable cell.

  17. type TimeoutException = java.util.concurrent.TimeoutException

  18. trait FutureTaskRunner extends TaskRunner

    The FutureTaskRunner trait is a base trait of task runners that provide some sort of future abstraction.

  19. trait ManagedBlocker extends AnyRef

    The ManagedBlocker trait.

  20. trait TaskRunner extends AnyRef

    The TaskRunner trait.

  21. trait ThreadPoolRunner extends FutureTaskRunner

    The ThreadPoolRunner trait uses a java.util.concurrent.ExecutorService to run submitted tasks.

  22. class ThreadRunner extends FutureTaskRunner

    The ThreadRunner trait.

Value Members

  1. object Await

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

  2. object BlockContext

  3. object ExecutionContext

    Contains factory methods for creating execution contexts.

  4. object Future

    Future companion object.

  5. object JavaConversions

    The JavaConversions object provides implicit converstions supporting interoperability between Scala and Java concurrency classes.

  6. object Promise

  7. def blocking[T](body: ⇒ T): T

    Used to designate a piece of code which potentially blocks, allowing the current BlockContext to adjust the runtime's behavior.

    Used to designate a piece of code which potentially blocks, allowing the current BlockContext to adjust the runtime's behavior. Properly marking blocking code may improve performance or avoid deadlocks.

    Blocking on an Awaitable should be done using Await.result instead of blocking.

    body

    A piece of code which contains potentially blocking or long running calls.

    Annotations
    @throws( clazz = classOf[Exception] )
    Exceptions thrown
    `CancellationException`

    if the computation was cancelled

    `InterruptedException`

    in the case that a wait within the blocking body was interrupted

  8. package duration

  9. def future[T](body: ⇒ T)(implicit execctx: ExecutionContext): Future[T]

    Starts an asynchronous computation and returns a Future object with the result of that computation.

    Starts an asynchronous computation and returns a Future object with the result of that computation.

    The result becomes available once the asynchronous computation is completed.

    T

    the type of the result

    body

    the asynchronous computation

    execctx

    the execution context on which the future is run

    returns

    the Future holding the result of the computation

  10. def promise[T](): Promise[T]

    Creates a promise object which can be completed with a value or an exception.

    Creates a promise object which can be completed with a value or an exception.

    T

    the type of the value in the promise

    returns

    the newly created Promise object

Deprecated Value Members

  1. object TaskRunners

    The TaskRunners object.

  2. object ops

    The object ops .

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