firebase_performance 0.7.0+6

Flutter plugin for Google Performance Monitoring for Firebase, an app measurement solution that monitors traces and HTTP/S network requests on Android and iOS.

Google Performance Monitoring for Firebase

A Flutter plugin to use the Google Performance Monitoring for Firebase API.

For Flutter plugins for other Firebase products, see README.md.

Usage

To use this plugin, first connect to Firebase by following the instructions for Android / iOS. Then add this plugin by following these instructions. See the example folder for details.

You can confirm that Performance Monitoring results appear in the Firebase Performance Monitoring console. Results should appear within a few minutes.

Define a Custom Trace

A custom trace is a report of performance data associated with some of the code in your app. To learn more about custom traces, see the Performance Monitoring overview.

final Trace myTrace = FirebasePerformance.instance.newTrace("test_trace");
await myTrace.start();

final Item item = cache.fetch("item");
if (item != null) {
  await myTrace.incrementMetric("item_cache_hit", 1);
} else {
  await myTrace.incrementMetric("item_cache_miss", 1);
}

await myTrace.stop();

Add monitoring for specific network requests

Performance Monitoring collects network requests automatically. Although this includes most network requests for your app, some might not be reported. To include specific network requests in Performance Monitoring, add the following code to your app:

class _MetricHttpClient extends BaseClient {
  _MetricHttpClient(this._inner);

  final Client _inner;

  @override
  Future<StreamedResponse> send(BaseRequest request) async {
    final HttpMetric metric = FirebasePerformance.instance
        .newHttpMetric(request.url.toString(), HttpMethod.Get);

    await metric.start();

    StreamedResponse response;
    try {
      response = await _inner.send(request);
      metric
        ..responsePayloadSize = response.contentLength
        ..responseContentType = response.headers['Content-Type']
        ..requestPayloadSize = request.contentLength
        ..httpResponseCode = response.statusCode;
    } finally {
      await metric.stop();
    }

    return response;
  }
}

class _MyAppState extends State<MyApp> {
.
.
.
  Future<void> testHttpMetric() async {
    final _MetricHttpClient metricHttpClient = _MetricHttpClient(Client());

    final Request request =
        Request("SEND", Uri.parse("https://www.google.com"));

    metricHttpClient.send(request);
  }
.
.
.
}

Getting Started

See the example directory for a complete sample app using Google Performance Monitoring for Firebase.

Issues and feedback

Please file FlutterFire specific issues, bugs, or feature requests in our issue tracker.

Plugin issues that are not specific to Flutterfire can be filed in the Flutter issue tracker.

To contribute a change to this plugin, please review our contribution guide and open a pull request.