com.twitter.util

TryLike

trait TryLike [+R, This[+R] <: TryLike[R, This]] extends AnyRef

This trait represents a computation that can succeed or fail. Its two current specializations are Try (a computation that has succeeded or failed) and Future (a computation that will succeed or fail).

linear super types: AnyRef, Any
known subclasses: Try, Throw, Return, Future, Promise, FutureTask
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Value Members

  1. def != (arg0: AnyRef) : Boolean

    attributes: final
    definition classes: AnyRef
  2. def != (arg0: Any) : Boolean

    o != arg0 is the same as !(o == (arg0)).

    o != arg0 is the same as !(o == (arg0)).

    arg0

    the object to compare against this object for dis-equality.

    returns

    false if the receiver object is equivalent to the argument; true otherwise.

    attributes: final
    definition classes: Any
  3. def ## () : Int

    attributes: final
    definition classes: AnyRef → Any
  4. def $asInstanceOf [T0] () : T0

    attributes: final
    definition classes: AnyRef
  5. def $isInstanceOf [T0] () : Boolean

    attributes: final
    definition classes: AnyRef
  6. def == (arg0: AnyRef) : Boolean

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    o == arg0 is the same as if (o eq null) arg0 eq null else o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: AnyRef
  7. def == (arg0: Any) : Boolean

    o == arg0 is the same as o.equals(arg0).

    o == arg0 is the same as o.equals(arg0).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    attributes: final
    definition classes: Any
  8. def andThen [R2] (f: (R) ⇒ This[R2]) : This[R2]

    Returns the given function applied to the value from this Return or returns this if this is a Throw.

    Returns the given function applied to the value from this Return or returns this if this is a Throw. Alias for flatMap

  9. def apply () : R

    Returns the value from this Return or throws the exception if this is a Throw

    Returns the value from this Return or throws the exception if this is a Throw

    attributes: abstract
  10. def asInstanceOf [T0] : T0

    This method is used to cast the receiver object to be of type T0.

    This method is used to cast the receiver object to be of type T0.

    Note that the success of a cast at runtime is modulo Scala's erasure semantics. Therefore the expression1.asInstanceOf[String] will throw a ClassCastException at runtime, while the expressionList(1).asInstanceOf[List[String]] will not. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    the receiver object.

    attributes: final
    definition classes: Any
  11. def clone () : AnyRef

    This method creates and returns a copy of the receiver object.

    This method creates and returns a copy of the receiver object.

    The default implementation of the clone method is platform dependent.

    returns

    a copy of the receiver object.

    attributes: protected
    definition classes: AnyRef
  12. def ensure (f: ⇒ Unit) : This[R]

    Invoked regardless of whether the computation completed successfully or unsuccessfully.

    Invoked regardless of whether the computation completed successfully or unsuccessfully. Implemented in terms of respond so that subclasses control evaluation order. Returns this.

  13. def eq (arg0: AnyRef) : Boolean

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    This method is used to test whether the argument (arg0) is a reference to the receiver object (this).

    The eq method implements an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation] on non-null instances of AnyRef: * It is reflexive: for any non-null instance x of type AnyRef, x.eq(x) returns true. * It is symmetric: for any non-null instances x and y of type AnyRef, x.eq(y) returns true if and only if y.eq(x) returns true. * It is transitive: for any non-null instances x, y, and z of type AnyRef if x.eq(y) returns true and y.eq(z) returns true, then x.eq(z) returns true.

    Additionally, the eq method has three other properties. * It is consistent: for any non-null instances x and y of type AnyRef, multiple invocations of x.eq(y) consistently returns true or consistently returns false. * For any non-null instance x of type AnyRef, x.eq(null) and null.eq(x) returns false. * null.eq(null) returns true.

    When overriding the equals or hashCode methods, it is important to ensure that their behavior is consistent with reference equality. Therefore, if two objects are references to each other (o1 eq o2), they should be equal to each other (o1 == o2) and they should hash to the same value (o1.hashCode == o2.hashCode).

    arg0

    the object to compare against this object for reference equality.

    returns

    true if the argument is a reference to the receiver object; false otherwise.

    attributes: final
    definition classes: AnyRef
  14. def equals (arg0: Any) : Boolean

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    This method is used to compare the receiver object (this) with the argument object (arg0) for equivalence.

    The default implementations of this method is an [http://en.wikipedia.org/wiki/Equivalence_relation equivalence relation]: * It is reflexive: for any instance x of type Any, x.equals(x) should return true. * It is symmetric: for any instances x and y of type Any, x.equals(y) should return true if and only if y.equals(x) returns true. * It is transitive: for any instances x, y, and z of type AnyRef if x.equals(y) returns true and y.equals(z) returns true, then x.equals(z) should return true.

    If you override this method, you should verify that your implementation remains an equivalence relation. Additionally, when overriding this method it is often necessary to override hashCode to ensure that objects that are "equal" (o1.equals(o2) returns true) hash to the same scala.Int (o1.hashCode.equals(o2.hashCode)).

    arg0

    the object to compare against this object for equality.

    returns

    true if the receiver object is equivalent to the argument; false otherwise.

    definition classes: AnyRef → Any
  15. def filter (p: (R) ⇒ Boolean) : This[R]

    Converts this to a Throw if the predicate does not obtain.

    Converts this to a Throw if the predicate does not obtain.

    attributes: abstract
  16. def finalize () : Unit

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    This method is called by the garbage collector on the receiver object when garbage collection determines that there are no more references to the object.

    The details of when and if the finalize method are invoked, as well as the interaction between finalizeand non-local returns and exceptions, are all platform dependent.

    attributes: protected
    definition classes: AnyRef
  17. def flatMap [R2, AlsoThis[R2] >: This[R2] <: This[R2]] (f: (R) ⇒ AlsoThis[R2]) : AlsoThis[R2]

    Returns the given function applied to the value from this Return or returns this if this is a Throw.

    Returns the given function applied to the value from this Return or returns this if this is a Throw.

    Note The gnarly type parameterization is there for Java compatibility, since Java does not support higher-kinded types.

    attributes: abstract
  18. def foreach (f: (R) ⇒ Unit) : Unit

    Applies the given function f if this is a Result.

    Applies the given function f if this is a Result.

  19. def get () : R

    Returns the value from this Return or throws the exception if this is a Throw.

    Returns the value from this Return or throws the exception if this is a Throw. Alias for apply()

  20. def getClass () : java.lang.Class[_]

    Returns a representation that corresponds to the dynamic class of the receiver object.

    Returns a representation that corresponds to the dynamic class of the receiver object.

    The nature of the representation is platform dependent.

    returns

    a representation that corresponds to the dynamic class of the receiver object.

    attributes: final
    definition classes: AnyRef
  21. def getOrElse [R2 >: R] (default: ⇒ R2) : R2

    Returns the value from this Return or the given argument if this is a Throw.

    Returns the value from this Return or the given argument if this is a Throw.

  22. def handle [R2 >: R] (rescueException: PartialFunction[Throwable, R2]) : This[R2]

    Calls the exceptionHandler with the exception if this is a Throw.

    Calls the exceptionHandler with the exception if this is a Throw. This is like map for the exception.

    attributes: abstract
  23. def hashCode () : Int

    Returns a hash code value for the object.

    Returns a hash code value for the object.

    The default hashing algorithm is platform dependent.

    Note that it is allowed for two objects to have identical hash codes (o1.hashCode.equals(o2.hashCode)) yet not be equal (o1.equals(o2) returns false). A degenerate implementation could always return 0. However, it is required that if two objects are equal (o1.equals(o2) returns true) that they have identical hash codes (o1.hashCode.equals(o2.hashCode)). Therefore, when overriding this method, be sure to verify that the behavior is consistent with the equals method.

    returns

    the hash code value for the object.

    definition classes: AnyRef → Any
  24. def isInstanceOf [T0] : Boolean

    This method is used to test whether the dynamic type of the receiver object is T0.

    This method is used to test whether the dynamic type of the receiver object is T0.

    Note that the test result of the test is modulo Scala's erasure semantics. Therefore the expression1.isInstanceOf[String] will return false, while the expression List(1).isInstanceOf[List[String]] will return true. In the latter example, because the type argument is erased as part of compilation it is not possible to check whether the contents of the list are of the requested typed.

    returns

    true if the receiver object is an instance of erasure of type T0; false otherwise.

    attributes: final
    definition classes: Any
  25. def isReturn : Boolean

    Returns true if the Try is a Return, false otherwise.

    Returns true if the Try is a Return, false otherwise.

    attributes: abstract
  26. def isThrow : Boolean

    Returns true if the Try is a Throw, false otherwise.

    Returns true if the Try is a Throw, false otherwise.

    attributes: abstract
  27. def map [X] (f: (R) ⇒ X) : This[X]

    Maps the given function to the value from this Return or returns this if this is a Throw

    Maps the given function to the value from this Return or returns this if this is a Throw

    attributes: abstract
  28. def ne (arg0: AnyRef) : Boolean

    o.ne(arg0) is the same as !(o.eq(arg0)).

    o.ne(arg0) is the same as !(o.eq(arg0)).

    arg0

    the object to compare against this object for reference dis-equality.

    returns

    false if the argument is not a reference to the receiver object; true otherwise.

    attributes: final
    definition classes: AnyRef
  29. def notify () : Unit

    Wakes up a single thread that is waiting on the receiver object's monitor.

    Wakes up a single thread that is waiting on the receiver object's monitor.

    attributes: final
    definition classes: AnyRef
  30. def notifyAll () : Unit

    Wakes up all threads that are waiting on the receiver object's monitor.

    Wakes up all threads that are waiting on the receiver object's monitor.

    attributes: final
    definition classes: AnyRef
  31. def onFailure (rescueException: (Throwable) ⇒ Unit) : This[R]

    Invoked only if the computation was successful.

    Invoked only if the computation was successful. Returns this

    attributes: abstract
  32. def onSuccess (f: (R) ⇒ Unit) : This[R]

    Invoked only if the computation was successful.

    Invoked only if the computation was successful. Returns this

    attributes: abstract
  33. def rescue [R2 >: R, AlsoThis[R] >: This[R] <: This[R]] (rescueException: PartialFunction[Throwable, AlsoThis[R2]]) : AlsoThis[R2]

    Calls the exceptionHandler with the exception if this is a Throw.

    Calls the exceptionHandler with the exception if this is a Throw. This is like flatMap for the exception.

    Note The gnarly type parameterization is there for Java compatibility, since Java does not support higher-kinded types.

    attributes: abstract
  34. def respond (k: (Try[R]) ⇒ Unit) : Unit

    Returns this object.

    Returns this object. This is overridden by subclasses.

    attributes: abstract
  35. def synchronized [T0] (arg0: T0) : T0

    attributes: final
    definition classes: AnyRef
  36. def toOption : Option[R]

    Returns None if this is a Throw or a Some containing the value if this is a Return

    Returns None if this is a Throw or a Some containing the value if this is a Return

  37. def toString () : String

    Returns a string representation of the object.

    Returns a string representation of the object.

    The default representation is platform dependent.

    returns

    a string representation of the object.

    definition classes: AnyRef → Any
  38. def wait () : Unit

    attributes: final
    definition classes: AnyRef
  39. def wait (arg0: Long, arg1: Int) : Unit

    attributes: final
    definition classes: AnyRef
  40. def wait (arg0: Long) : Unit

    attributes: final
    definition classes: AnyRef

Inherited from AnyRef

Inherited from Any