Future containing the value of this promise.
Returns whether the promise has already been completed with a value or an exception.
Returns whether the promise has already been completed with a value or an exception.
Note: Using this method may result in non-deterministic concurrent programs.
true
if the promise is already completed, false
otherwise
Tries to complete the promise with either a value or the exception.
Tries to complete the promise with either a value or the exception.
Note: Using this method may result in non-deterministic concurrent programs.
If the promise has already been completed returns false
, or true
otherwise.
Test two objects for inequality.
Test two objects for inequality.
true
if !(this == that), false otherwise.
Equivalent to x.hashCode
except for boxed numeric types and null
.
Equivalent to x.hashCode
except for boxed numeric types and null
.
For numerics, it returns a hash value which is consistent
with value equality: if two value type instances compare
as true, then ## will produce the same hash value for each
of them.
For null
returns a hashcode where null.hashCode
throws a
NullPointerException
.
a hash value consistent with ==
Test two objects for equality.
Test two objects for equality.
The expression x == that
is equivalent to if (x eq null) that eq null else x.equals(that)
.
true
if the receiver object is equivalent to the argument; false
otherwise.
Cast the receiver object to be of type T0
.
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 expression 1.asInstanceOf[String]
will throw a ClassCastException
at
runtime, while the expression List(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 type.
the receiver object.
if the receiver object is not an instance of the erasure of type T0
.
Create a copy of the receiver object.
Completes the promise with either an exception or a value.
Completes the promise with either an exception or a value.
Either the value or the exception to complete the promise with.
If the promise has already been fulfilled, failed or has timed out, calling this method will throw an IllegalStateException.
Completes this promise with the specified future, once that future is completed.
Completes this promise with the specified future, once that future is completed.
This promise
Tests whether the argument (arg0
) is a reference to the receiver object (this
).
Tests whether the argument (arg0
) is a reference to the receiver object (this
).
The eq
method implements an equivalence relation on
non-null instances of AnyRef
, and has three additional properties:
x
and y
of type AnyRef
, multiple invocations of
x.eq(y)
consistently returns true
or consistently returns false
.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
).
true
if the argument is a reference to the receiver object; false
otherwise.
The equality method for reference types.
Completes the promise with an exception.
Completes the promise with an exception.
The throwable to complete the promise with.
If the throwable used to fail this promise is an error, a control exception
or an interrupted exception, it will be wrapped as a cause within an
ExecutionException
which will fail the promise.
If the promise has already been fulfilled, failed or has timed out, calling this method will throw an IllegalStateException.
Called by the garbage collector on the receiver object when there are no more references to the object.
Called by the garbage collector on the receiver object when there are no more references to the object.
The details of when and if the finalize
method is invoked, as
well as the interaction between finalize
and non-local returns
and exceptions, are all platform dependent.
Returns string formatted according to given format
string.
Returns string formatted according to given format
string.
Format strings are as for String.format
(@see java.lang.String.format).
A representation that corresponds to the dynamic class of the receiver object.
A representation that corresponds to the dynamic class of the receiver object.
The nature of the representation is platform dependent.
a representation that corresponds to the dynamic class of the receiver object.
not specified by SLS as a member of AnyRef
The hashCode method for reference types.
Test whether the dynamic type of the receiver object is T0
.
Test whether the dynamic type of the receiver object is T0
.
Note that the result of the test is modulo Scala's erasure semantics.
Therefore the expression 1.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 specified type.
true
if the receiver object is an instance of erasure of type T0
; false
otherwise.
Equivalent to !(this eq that)
.
Equivalent to !(this eq that)
.
true
if the argument is not a reference to the receiver object; false
otherwise.
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.
not specified by SLS as a member of AnyRef
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.
not specified by SLS as a member of AnyRef
Completes the promise with a value.
Completes the promise with a value.
The value to complete the promise with.
If the promise has already been fulfilled, failed or has timed out, calling this method will throw an IllegalStateException.
Creates a String representation of this object.
Creates a String representation of this object. The default representation is platform dependent. On the java platform it is the concatenation of the class name, "@", and the object's hashcode in hexadecimal.
a String representation of the object.
Attempts to complete this promise with the specified future, once that future is completed.
Attempts to complete this promise with the specified future, once that future is completed.
This promise
Tries to complete the promise with an exception.
Tries to complete the promise with an exception.
Note: Using this method may result in non-deterministic concurrent programs.
If the promise has already been completed returns false
, or true
otherwise.
Tries to complete the promise with a value.
Tries to complete the promise with a value.
Note: Using this method may result in non-deterministic concurrent programs.
If the promise has already been completed returns false
, or true
otherwise.
(promise: StringAdd).self
(promise: StringFormat).self
(promise: ArrowAssoc[Promise[T]]).x
(Since version 2.10.0) Use leftOfArrow
instead
(promise: Ensuring[Promise[T]]).x
(Since version 2.10.0) Use resultOfEnsuring
instead
Promise is an object which can be completed with a value or failed with an exception.