如何恢复失败的任务？

Question

假设：

import scalaz.concurrent.Task
import scalaz._

val result: Task[String \/ Int] = Task { throw new RuntimeException("!")}

然后，我运行它来获得RuntimeException：

scala> result.unsafePerformSync
java.lang.RuntimeException: !
...

Task是否有“等效”Future#recover，例如以下内容？

def recover[A, B, C](t: Task[A], handleError: Throwable => B \/ C]: Task[B \/ C]

Answer 1

Task#handle（或者handleWith）可以解决问题

  def f: String = {
    throw new RuntimeException()
    "I will fail"
  }
  Task(f).handle{ case _ ⇒ "recovered"}.run \\ recovered