Package

concurrent

Permalink

package concurrent

Visibility

Public
All

Type Members

trait Cancelable extends AnyRef

Represents an asynchronous computation whose execution can be canceled.
Represents an asynchronous computation whose execution can be canceled. Used by monifu.concurrent.Scheduler giving you the ability to cancel scheduled units of work.
It is equivalent to java.io.Closeable, but without the I/O focus, or to IDisposable in Microsoft .NET, or to akka.actor.Cancellable.
trait Scheduler extends ExecutionContext with UncaughtExceptionReporter

A Scheduler is an scala.concurrent.ExecutionContext that additionally can schedule the execution of units of work to run with a delay or periodically.
A Scheduler is an scala.concurrent.ExecutionContext that additionally can schedule the execution of units of work to run with a delay or periodically.

Annotations
@implicitNotFound( ... )
trait UncaughtExceptionReporter extends AnyRef

An exception reporter is a function that logs an uncaught error.
An exception reporter is a function that logs an uncaught error.
Usually taken as an implicit when executing computations that could fail, but that must not blow up the call-stack, like asynchronous tasks.
A default implicit is provided that simply logs the error on STDERR.

Annotations
@implicitNotFound( ... )

Value Members

object Cancelable
object FutureUtils
object Implicits

Defines implicit values that can be used by importing in the current context.
Defines implicit values that can be used by importing in the current context.
Example:
```
import monifu.concurrent.Implicits.globalScheduler
```
object Scheduler extends SchedulerCompanion
object UncaughtExceptionReporter

See UncaughtExceptionReporter.
package async
package atomic

A small toolkit of classes that support compare-and-swap semantics for mutation of variables.
A small toolkit of classes that support compare-and-swap semantics for mutation of variables.
On top of the JVM, this means dealing with lock-free thread-safe programming. On top of Javascript / Scala.js using Atomic references is still good because:
1. boxing values in a smart reference with nice helpers for transformations is always a good idea. 2. on the JVM there are times when synchronization, and when used for synchronization, atomic references can now cross compile to Scala.js 3. compareAndSet is actually a good idea to have even in an asynchronous, non-multi-threaded environment, such as Javascript, because it takes time into account and time related problems can happen even without multi-threading
The backbone of Atomic references is this method:
```
def compareAndSet(expect: T, update: T): Boolean
```
This method atomically sets a variable to the update value if it currently holds the expect value, reporting true on success or false on failure. The classes in this package also contain methods to get and unconditionally set values. In comparison with the JVM version, these Atomic references do not have methods for weakly setting values (i.e. weakCompareAndSet, lazySet), since those really make no sense in Javascript.
Building a reference is easy with the provided constructor, which will automatically return the most specific type needed:
```
val atomicNumber = Atomic(12L)

atomicNumber.incrementAndGet()
```
In comparison with java.util.concurrent.AtomicReference, these references implement common interfaces that you can use generically (i.e. Atomic[T], AtomicNumber[T]). And also provide useful helpers for atomically mutating of values (i.e. transform, transformAndGet, getAndTransform, etc...).
Other differences with the JVM-variant - in Scala.js you do not have access to the methods meant to block (spin-lock) the current thread (e.g. waitForCompareAndSet, waitForCondition, etc...), as the semantics of those operations aren't possible on top of Scala.js
package cancelables

Cancelables represent asynchronous units of work or other things scheduled for execution and whose execution can be canceled.
Cancelables represent asynchronous units of work or other things scheduled for execution and whose execution can be canceled.
One use-case is the scheduling done by monifu.concurrent.Scheduler, in which the scheduling methods return a Cancelable, allowing the canceling of the scheduling.
Example:
```
val s = ConcurrentScheduler()
val task = s.scheduleRepeated(10.seconds, 50.seconds, {
  println("Hello")
})

// later, cancels the scheduling ...
task.cancel()
```
object extensions
package locks

Package provided for Scala.js for source-level compatibility.
Package provided for Scala.js for source-level compatibility. Usage of these locks in Scala.js does not imply any overhead.
package schedulers

Ungrouped