DoExtensions<T> extension

Extends the Stream class with the ability to execute a callback function at different points in the Stream's lifecycle.

on

• Stream<T>

Methods

doOnCancel(FutureOr<void> onCancel()) → Stream<T>

Invokes the given callback function when the stream subscription is cancelled. Often called doOnUnsubscribe or doOnDispose in other implementations.

doOnData(void onData(T event)) → Stream<T>

Invokes the given callback function when the stream emits an item. In other implementations, this is called doOnNext.

doOnDone(void onDone()) → Stream<T>

Invokes the given callback function when the stream finishes emitting items. In other implementations, this is called doOnComplete(d).

doOnEach(void onEach(StreamNotification<T> notification)) → Stream<T>

Invokes the given callback function when the stream emits data, emits an error, or emits done. The callback receives a StreamNotification object.

doOnError(void onError(Object, StackTrace)) → Stream<T>

Invokes the given callback function when the stream emits an error.

doOnListen(void onListen()) → Stream<T>

Invokes the given callback function when the stream is first listened to.

doOnPause(void onPause()) → Stream<T>

Invokes the given callback function when the stream subscription is paused.

doOnResume(void onResume()) → Stream<T>

Invokes the given callback function when the stream subscription resumes receiving items.