MultiStreamController<T> class Null safety

An enhanced stream controller provided by Stream.multi.

Acts like a normal asynchronous controller, but also allows adding events synchronously. As with any synchronous event delivery, the sender should be very careful to not deliver events at times when a new listener might not be ready to receive them. That generally means only delivering events synchronously in response to other asynchronous events, because that is a time when an asynchronous event could happen.

Implemented types
  • @Since("2.9")




done Future
A future which is completed when the stream controller is done sending events. [...]
read-only, inherited
hashCode int
The hash code for this object. [...]
read-only, inherited
hasListener bool
Whether there is a subscriber on the Stream.
read-only, inherited
isClosed bool
Whether the stream controller is closed for adding more events. [...]
read-only, inherited
isPaused bool
Whether the subscription would need to buffer events. [...]
read-only, inherited
onCancel ↔ (FutureOr<void> Function?()?)
The callback which is called when the stream is canceled. [...]
read / write, inherited
onListen ↔ (void Function?()?)
The callback which is called when the stream is listened to. [...]
read / write, inherited
onPause ↔ (void Function?()?)
The callback which is called when the stream is paused. [...]
read / write, inherited
onResume ↔ (void Function?()?)
The callback which is called when the stream is resumed. [...]
read / write, inherited
runtimeType Type
A representation of the runtime type of the object.
read-only, inherited
sink StreamSink<T>
Returns a view of this object that only exposes the StreamSink interface.
read-only, inherited
stream Stream<T>
The stream that this controller is controlling.
read-only, inherited


add(T event) → void
Sends a data event. [...]
addError(Object error, [StackTrace? stackTrace]) → void
Sends or enqueues an error event. [...]
addErrorSync(Object error, [StackTrace? stackTrace]) → void
Adds and delivers an error event. [...]
addStream(Stream<T> source, {bool? cancelOnError}) Future
Receives events from source and puts them into this controller's stream. [...]
addSync(T value) → void
Adds and delivers an event. [...]
close() Future
Closes the stream. [...]
closeSync() → void
Closes the controller and delivers a done event. [...]
noSuchMethod(Invocation invocation) → dynamic
Invoked when a non-existent method or property is accessed. [...]
toString() String
Returns a string representation of this object.


operator ==(Object other) bool
The equality operator. [...]