Class

play.api.libs.concurrent

CustomExecutionContext

Related Doc: package concurrent

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abstract class CustomExecutionContext extends ExecutionContextExecutor

This class defines a custom execution context that delegates to an akka.actor.ActorSystem.

It is very useful for situations in which the default execution context should not be used, for example if a database or blocking I/O is being used.

To define a custom context, subclass CustomExecutionContext with the dispatcher name:

@Singleton
class DatabaseExecutionContext @Inject()(system: ActorSystem)
   extends CustomExecutionContext(system, "database-dispatcher")

and then bind it in dependency injection:

bind[DatabaseExecutionContext].to(classOf[DatabaseExecutionContext]).asEagerSingleton()

Then have the execution context passed in as an implicit parameter:

class DatabaseService @Inject()(implicit executionContext: DatabaseExecutionContext) {
  ...
}
Source
CustomExecutionContext.scala
See also

Thread Pools

Dispatchers

Linear Supertypes
ExecutionContextExecutor, Executor, ExecutionContext, AnyRef, Any
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Inherited
  1. CustomExecutionContext
  2. ExecutionContextExecutor
  3. Executor
  4. ExecutionContext
  5. AnyRef
  6. Any
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Visibility
  1. Public
  2. All

Instance Constructors

  1. new CustomExecutionContext(system: ActorSystem, name: String)

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    system

    the actor system

    name

    the full path of the dispatcher name in Typesafe Config.

Value Members

  1. final def !=(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  2. final def ##(): Int

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    Definition Classes
    AnyRef → Any
  3. final def ==(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  4. final def asInstanceOf[T0]: T0

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    Definition Classes
    Any
  5. def clone(): AnyRef

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  6. final def eq(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  7. def equals(arg0: Any): Boolean

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    Definition Classes
    AnyRef → Any
  8. def execute(command: Runnable): Unit

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    Definition Classes
    CustomExecutionContext → Executor → ExecutionContext
  9. def finalize(): Unit

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    Attributes
    protected[java.lang]
    Definition Classes
    AnyRef
    Annotations
    @throws( classOf[java.lang.Throwable] )
  10. final def getClass(): Class[_]

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    Definition Classes
    AnyRef → Any
  11. def hashCode(): Int

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    Definition Classes
    AnyRef → Any
  12. final def isInstanceOf[T0]: Boolean

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    Definition Classes
    Any
  13. final def ne(arg0: AnyRef): Boolean

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    Definition Classes
    AnyRef
  14. final def notify(): Unit

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    Definition Classes
    AnyRef
  15. final def notifyAll(): Unit

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    Definition Classes
    AnyRef
  16. def prepare(): ExecutionContext

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    Definition Classes
    ExecutionContext
  17. def reportFailure(cause: Throwable): Unit

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    Definition Classes
    CustomExecutionContext → ExecutionContext
  18. final def synchronized[T0](arg0: ⇒ T0): T0

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    Definition Classes
    AnyRef
  19. def toString(): String

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    Definition Classes
    AnyRef → Any
  20. final def wait(): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  21. final def wait(arg0: Long, arg1: Int): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )
  22. final def wait(arg0: Long): Unit

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    Definition Classes
    AnyRef
    Annotations
    @throws( ... )

Inherited from ExecutionContextExecutor

Inherited from Executor

Inherited from ExecutionContext

Inherited from AnyRef

Inherited from Any

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