galileo_poll 3.0.0 icon indicating copy to clipboard operation
galileo_poll: ^3.0.0 copied to clipboard

package:galileo_client support for "realtime" interactions with Galileo via long polling.

poll #

Pub build status

package:galileo_client support for "realtime" interactions with Galileo via long polling.

Galileo supports WebSockets on the server and client, which makes it very straightforward to implement realtime collections. However, not every user's browser supports WebSockets. In such a case, applications might gracefully degrade to long-polling the server for changes.

A PollingService wraps a client-side Service (typically a REST-based one), and calls its index method at a regular interval. After indexing, the PollingService performs a diff and identifies whether items have been created, modified, or removed. The updates are sent out through onCreated, onModified, etc., effectively managing a real-time collection of data.

A common use-case would be passing this service to ServiceList, a class that manages the state of a collection managed in real-time.

import 'package:galileo_client/io.dart';
import 'package:galileo_poll/galileo_poll.dart';

main() {
  var app = new Rest('http://localhost:3000');

  var todos = new ServiceList(
    new PollingService(
      // Typically, you'll pass a REST-based service instance here.
      app.service('api/todos'),

      // `index` called every 5 seconds
      const Duration(seconds: 5),
    ),
  );

  todos.onChange.listen((_) {
    // Something happened here.
    // Maybe an item was created, modified, etc.
  });
}
1
likes
100
pub points
8%
popularity

Publisher

verified publisher icongalileodart.com

package:galileo_client support for "realtime" interactions with Galileo via long polling.

Homepage

Documentation

API reference

License

Icon for licenses.MIT (LICENSE)

Dependencies

async, collection, galileo_client

More

Packages that depend on galileo_poll