CustomExecutionContext

This class defines a custom execution context that delegates to an pekko.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) {
  ...
}