concurrent

Type Members

1. final class DefaultPoolJumper extends PoolJumper

   

2. final class FutureOption[+A] extends AnyVal

   

   A monadic wrapper around the common case of Future[Option[A]].

   A monadic wrapper around the common case of Future[Option[A]]. Allows you to use for-comprehensions around Future[Option[A]] without needing to special case each None case.

   Example:

   val result: Future[Option[Venue]] = (for { user <- FutureOption(services.futureDb.fetchOne(Q(User).where(_.id eqs 32))) tip <- FutureOption(services.futureDb.fetchOne(Q(Tip).where(_.userid eqs user.id))) venue <- FutureOption(services.futureDb.fetchOne(Q(Venue).where(_.id eqs tip.venueid))) if !venue.isHome } yield venue).resolve

   Example 2: val sixteenFOpt = FutureOption(Future.value(Some(16))) for { s <- sixteenFOpt } { println(s) } This will output "16".

   FutureOption is a value class. http://docs.scala-lang.org/overviews/core/value-classes.html

3. final class FutureOutcome[+S, +F] extends AnyVal

   

   Inspired by io.fsq.common.concurrent.FutureOption, this is a monadic wrapper around Future[Outcome[S, F]] so you can easily combine Future[S], Option[S], Outcome[S, F], etc.

   Inspired by io.fsq.common.concurrent.FutureOption, this is a monadic wrapper around Future[Outcome[S, F]] so you can easily combine Future[S], Option[S], Outcome[S, F], etc. into a for yield.

   Example:

   val result: Future[Outcome[Venue, String]] = (for { userid <- FutureOutcome.lift(msg.useridOption, "no-userid") user <- FutureOutcome.lift(services.futureDb.fetchOne(Q(User).where(_.userid eqs userid)), "no-user") venue <- FutureOutcome(services.foo.bar(user)) // where bar returns Future[Outcome[Venue, String]] _ <- FutureOutcome.failWhen(venue.isHomeOrOffice, "home-or-office-venue") } yield venue).resolve

4. trait PoolJumper extends AnyRef

   

   PoolJumper is a utility used in a for comprehension of futures that can control the execution context of the yield block

   PoolJumper is a utility used in a for comprehension of futures that can control the execution context of the yield block

   PoolJumper implements the interface for Futures.runYieldInPool, used in the following example

   xF, yF might be finagle futures, runYieldInPool will run doBlockingWork in a safe execution context.

   for { x <- xF y <- yF _ <- Futures.runYieldInPool(pool) } yield doBlockingWork

5. class StableEvent[T] extends Event[T]

   

   An com.twitter.util.Event that only notifies if the observed value actually changes.