Sink and Stream both are parts of the StreamController. You add a data to the StreamController using Sink which can be listened via the Stream. Example: final _user = StreamController<User>(); Sink get updateUser => _user.sink; Stream<User> get user => _user.stream; Usage: updateUser.add(yourUserObject); // This will add data to the stream. Whenever a data is added … Read more
Short-answer: no, but you should. Nothing in the contract of either StreamSubscription or StreamSink requires closing the resources, but some use cases can lead to memory leaks if you don’t close them, even though in some cases, doing so might be confusing. Part of the confusion around these classes is that they are overloaded, and … Read more
There are roughly two categories of APIs here: pull and push. Pull Async pull APIs are a good fit for cases where data is pulled from a source. This source might be a file, or a network socket, or a directory listing, or anything else. The key is that work is done to pull or … Read more
In traditional message processing, you apply simple computations on the messages — in most cases individually per message. In stream processing, you apply complex operations on multiple input streams and multiple records (ie, messages) at the same time (like aggregations and joins). Furthermore, traditional messaging systems cannot go “back in time” — ie, they automatically … Read more