bloc_signals_otel 0.9.0

OpenTelemetry tracing instrumentation for BlocSignal.

⚡ bloc_signals_otel "With the rigor of BLoC and the flex and speed of Signals" OpenTelemetry tracing instrumentation for BlocSignal state containers.

This package provides OtelBlocSignalObserver, a custom BlocSignalObserver that maps BLoC events, state transitions, and exception tracebacks into OpenTelemetry spans for end-to-end distributed tracing.

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🌐 Ecosystem Packages

The BlocSignal monorepo consists of 10 modular packages:

Package	Version	Description
bloc_signals		Core pure Dart reactive state primitives bridging BLoC & Signals
bloc_signals_flutter		Flutter UI bindings, providers, builders, listeners & selectors
bloc_signals_jaspr		Jaspr web component integration and state binding for BlocSignal
bloc_signals_riverpod		Bidirectional Riverpod 2/3 interop adapters & provider extensions
bloc_signals_hydrate		Automated synchronous local state persistence & hydration
bloc_signals_replay		Undo & redo state history tracking for CubitSignal and BlocSignal
bloc_signals_otel		OpenTelemetry tracing and span generation for state transitions
bloc_signals_devtools		Universal DevTools telemetry observer using dart:developer
bloc_signals_test		Declarative unit testing utilities (blocSignalTest)
bloc_signals_lint		Custom analyzer lint rules & automated IDE quick-fixes

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⚡ Key Features

• 📊 Span Correlation: Maps incoming BLoC events directly to active OpenTelemetry trace spans.
• 🚨 Error Tracing: Captures exceptions in onError and attaches identity hash-matched stack traces to the active span.
• 🛡️ Memory-Leak Protection: Internal active span map capped at 1,000 items with LRU eviction to prevent heap leaks.

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🚀 Getting Started

Add bloc_signals_otel to your pubspec.yaml:

dependencies:
  bloc_signals: ^0.2.6
  bloc_signals_otel: ^0.2.3
  opentelemetry: ^0.1.0

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💡 Quick Example

import 'package:bloc_signals/bloc_signals.dart';
import 'package:bloc_signals_otel/bloc_signals_otel.dart';
import 'package:opentelemetry/api.dart' as otel;

void main() {
  final tracer = otel.globalTracerProvider.getTracer('my_app');

  // Register OpenTelemetry observer globally
  BlocSignalObserver.observer = OtelBlocSignalObserver(tracer: tracer);

  final bloc = CounterBloc();
  bloc.add(Increment()); // Automatically generates OpenTelemetry spans!
}

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🤖 AI Coding Assistant Skill

This package is supported by an official pre-packaged AI Coding Skill representing OpenTelemetry span correlation, error traceback matching, and tracing observer guidelines for BlocSignal.

If you develop with AI coding assistants (such as Claude Code, Antigravity, Gemini, Cursor, or Codex), you can load the bloc-signals skill bundle to guide your assistant's code generation and analysis.

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📜 License

MIT License. See LICENSE for details.