Returns a continuous stream, indicating whether the value has changed.
Returns a continuous stream, indicating whether the value has changed.
This will spike true
once for each time the value of Signal
was changed.
It will always start with true
when the process is run or when the Signal
is
set for the first time.
Returns the discrete version of changed
.
Returns the discrete version of changed
. Will emit Unit
when the value
is changed.
Asynchronously sets the current value of this Signal
and returns new value os this Signal
.
Asynchronously sets the current value of this Signal
and returns new value os this Signal
.
If this Signal
has not been set yet, the Task will return None and value is set. If this Signal
is finished
Task will fail with End
exception. If this Signal
is failed
Task will fail
with Signal
failure exception.
Furthermore if f
results in evaluating to None, this Task is no-op and will return current value of the
Signal
.
Returns the continuous version of this signal, always equal to the
current A
inside value
.
Returns the continuous version of this signal, always equal to the
current A
inside value
. Note that this may not see all changes of A
as it
gets always current fresh A
at every request.
Returns the discrete version of this signal, updated only when value
is changed.
Returns the discrete version of this signal, updated only when value
is changed. Value may change several times between reads, but it is
guaranteed this will always get latest known value after any change. If you want
to be notified about every single change use async.queue
for signalling.
It will emit the current value of the Signal after being run or when the signal is set for the first time
Asynchronously get the current value of this Signal
Asynchronously sets the current value of this Signal
and returns previous value of the Signal
.
Asynchronously sets the current value of this Signal
and returns previous value of the Signal
.
If this Signal
has not been set yet, the Task will return None and value is set. If this Signal
is finished
Task will fail with End
exception. If this Signal
is failed
Task will fail
with Signal
failure exception.
Sets the value of this Signal
.
Returns sink that can be used to set this signal
Indicate that the value is no longer valid.
Indicate that the value is no longer valid. Any attempts to set
or get
this
Signal
after a close
will fail with Terminated(End)
exception. This Signal
is finished
from now on.
Running this task once the Signal
is failed
or finished
is no-op and this task will not fail.
Raise an asynchronous error for readers of this Signal
.
Raise an asynchronous error for readers of this Signal
. Any attempts to
set
or get
this Ref
after the fail
will result in task failing with Terminated(Error(errr))
.
This Signal
is failed
from now on.
Running this task once the Signal
is failed
or finished
is no-op and this task will not fail.
Indicate that the value is no longer valid.
Indicate that the value is no longer valid. Any attempts to set
or get
this
Signal
after a close
will fail with Terminated(Kill)
exception. This Signal
is finished
from now on.
Running this task once the Signal
is failed
or finished
is no-op and this task will not fail.
Asynchronously refreshes the value of the signal,
keep the value of this Signal
the same, but notify any listeners.
Asynchronously refreshes the value of the signal,
keep the value of this Signal
the same, but notify any listeners.
If the Signal
is not yet set, this is no-op
A signal whose value may be set asynchronously. Provides continuous and discrete streams for responding to changes to this value.