Support ignoredExceptionsForType

CHANGELOG.md

@@ -2,6 +2,11 @@
 
 ## Unreleased
 
+### Features
+
+- Support `ignoredExceptionsForType` ([#2150](https://github.com/getsentry/sentry-dart/pull/2150))
+  - Filter out exception types by calling `SentryOptions.addExceptionFilterForType(Type exceptionType)`
+
 ### Fixes
 
 - Disable sff & frame delay detection on web, linux and windows ([#2182](https://github.com/getsentry/sentry-dart/pull/2182))

dart/lib/src/sentry_client.dart

@@ -45,7 +45,7 @@
 
   late final MetricsAggregator? _metricsAggregator;
 
-  static final _sentryId = Future.value(SentryId.empty());
+  static final _emptySentryId = Future.value(SentryId.empty());
 
   SentryExceptionFactory get _exceptionFactory => _options.exceptionFactory;
 
@@ -83,14 +83,24 @@
     dynamic stackTrace,
     Hint? hint,
   }) async {
+    if (_options.containsIgnoredExceptionForType(event.throwable)) {
+      _options.logger(
+        SentryLevel.debug,
+        'Event was dropped as the exception ${event.throwable.runtimeType.toString()} is ignored.',
+      );
+      _options.recorder
+          .recordLostEvent(DiscardReason.eventProcessor, _getCategory(event));
+      return _emptySentryId;
+    }
+
     if (_sampleRate()) {
       _options.recorder
           .recordLostEvent(DiscardReason.sampleRate, _getCategory(event));
       _options.logger(
         SentryLevel.debug,
         'Event ${event.eventId.toString()} was dropped due to sampling decision.',
       );
-      return _sentryId;
+      return _emptySentryId;
     }
 
     SentryEvent? preparedEvent = _prepareEvent(event, stackTrace: stackTrace);
@@ -106,7 +116,7 @@
 
     // dropped by scope event processors
     if (preparedEvent == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     preparedEvent = await _runEventProcessors(
@@ -117,7 +127,7 @@
 
     // dropped by event processors
     if (preparedEvent == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     preparedEvent = _createUserOrSetDefaultIpAddress(preparedEvent);
@@ -129,7 +139,7 @@
 
     // dropped by beforeSend
     if (preparedEvent == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     var attachments = List<SentryAttachment>.from(scope?.attachments ?? []);
@@ -326,8 +336,8 @@
 
     // dropped by scope event processors
     if (preparedTransaction == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     preparedTransaction = await _runEventProcessors(
       preparedTransaction,
@@ -337,15 +347,15 @@
 
     // dropped by event processors
     if (preparedTransaction == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     preparedTransaction =
         await _runBeforeSend(preparedTransaction, hint) as SentryTransaction?;
 
     // dropped by beforeSendTransaction
     if (preparedTransaction == null) {
-      return _sentryId;
+      return _emptySentryId;
     }
 
     final attachments = scope?.attachments

dart/lib/src/sentry_options.dart

@@ -334,6 +334,22 @@ class SentryOptions {
     _scopeObservers.add(scopeObserver);
   }
 
+  final List<Type> _ignoredExceptionsForType = [];
+
+  /// Ignored exception types.
+  List<Type> get ignoredExceptionsForType => _ignoredExceptionsForType;
+
+  /// Adds exception type to the list of ignored exceptions.
+  void addExceptionFilterForType(Type exceptionType) {
+    _ignoredExceptionsForType.add(exceptionType);
+  }
+
+  /// Check if [ignoredExceptionsForType] contains an exception.
+  bool containsIgnoredExceptionForType(dynamic exception) {
+    return exception != null &&
+        _ignoredExceptionsForType.contains(exception.runtimeType);
+  }
+
   @internal
   late ClientReportRecorder recorder = NoOpClientReportRecorder();
 

dart/test/sentry_client_test.dart

@@ -1033,6 +1033,42 @@ void main() {
     });
   });
 
+  group('SentryClient ignored exceptions', () {
+    late Fixture fixture;
+
+    setUp(() {
+      fixture = Fixture();
+    });
+
+    test('addExceptionFilterForType drops matching error event throwable',
+        () async {
+      fixture.options.addExceptionFilterForType(ExceptionWithCause);
+
+      final throwable = ExceptionWithCause(Error(), StackTrace.current);
+      final event = SentryEvent(throwable: throwable);
+
+      final client = fixture.getSut();
+      await client.captureEvent(event);
+
+      expect((fixture.transport).called(0), true);
+    });
+
+    test('record ignored exceptions dropping event', () async {
+      fixture.options.addExceptionFilterForType(ExceptionWithCause);
+
+      final throwable = ExceptionWithCause(Error(), StackTrace.current);
+      final event = SentryEvent(throwable: throwable);
+
+      final client = fixture.getSut();
+      await client.captureEvent(event);
+
+      expect(fixture.recorder.discardedEvents.first.reason,
+          DiscardReason.eventProcessor);
+      expect(
+          fixture.recorder.discardedEvents.first.category, DataCategory.error);
+    });
+  });
+
   group('SentryClient before send transaction', () {
     late Fixture fixture;