Packages

c

play.api.libs.concurrent

CustomExecutionContext

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

Dispatchers

Thread Pools

Linear Supertypes
ExecutionContextExecutor, Executor, ExecutionContext, AnyRef, Any
Ordering
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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)

    system

    the actor system

    name

    the full path of the dispatcher name in Typesafe Config.

Value Members

  1. def execute(command: Runnable): Unit
    Definition Classes
    CustomExecutionContext → Executor → ExecutionContext
  2. def reportFailure(cause: Throwable): Unit
    Definition Classes
    CustomExecutionContext → ExecutionContext

Deprecated Value Members

  1. def prepare(): ExecutionContext
    Definition Classes
    ExecutionContext
    Annotations
    @deprecated
    Deprecated

    (Since version 2.12.0) preparation of ExecutionContexts will be removed