blocpod_logger #

Generic structured logging primitives for Blocpod packages.

This package owns:

• BlocpodLogLevel
• BlocpodLogEntry
• BlocpodLogSink
• BlocpodLogEncoder
• JsonLogEncoder
• PrettyLogEncoder
• PrettyLogDetail
• DebugPrintLogSink
• formatBlocpodLogEntry

blocpod_logger may use Flutter's debugPrint for local-development output. It must not import blocpod_arch. DebugPrintLogSink and formatBlocpodLogEntry emit versioned JSON Lines by default. Pretty output is opt-in.

Usage #

JSON is the default:

import 'package:blocpod_logger/blocpod_logger.dart';

final sink = DebugPrintLogSink();

sink.write(
  BlocpodLogEntry(
    level: BlocpodLogLevel.info,
    message: 'CounterController IncrementEvent state.transition#1 data->data',
    timestamp: DateTime.utc(2026, 8, 3, 12),
    sequence: 7,
    traceId: 'trace-1',
    spanId: 'span-2',
    attributes: const {
      'phase': 'state.transition',
      'transitionIndex': 1,
      'durationMicros': 1200,
    },
  ),
);

Example output:

{"schema":"blocpod.log","schemaVersion":1,"timestamp":"2026-08-03T12:00:00.000Z","sequence":7,"level":"info","message":"CounterController IncrementEvent state.transition#1 data->data","trace":{"traceId":"trace-1","spanId":"span-2"},"attributes":{"phase":"state.transition","transitionIndex":1,"durationMicros":1200}}

To opt into pretty local output:

final sink = DebugPrintLogSink(
  encoder: const PrettyLogEncoder(
    detail: PrettyLogDetail.verbose,
  ),
);

Example output:

12:00:00.000Z INFO  CounterController IncrementEvent state.transition#1 data->data
  sequence=7 trace=trace-1/span-2
  attributes={phase: state.transition, transitionIndex: 1, durationMicros: 1200}

Migration notes #

• BlocpodLogEntry.metadata was replaced by attributes.
• sequence, traceId, spanId, and parentSpanId are now dedicated fields.
• Blocpod no longer performs automatic key-based redaction. Applications own sensitive-data policy before writing to sinks or forwarding to external SDKs.

External sink adapters #

External logger adapters are application-owned boundary code. blocpod_logger does not export a UserProvidedLogSink helper or a built-in Talker/Sentry integration.

Minimal Talker adapter pseudocode:

final class TalkerLogSink implements BlocpodLogSink {
  TalkerLogSink(this.talker);

  final Talker talker;

  @override
  void write(BlocpodLogEntry entry) {
    talker.log(
      entry.message,
      logLevel: entry.level.name,
      time: entry.timestamp,
      exception: entry.error,
      stackTrace: entry.stackTrace,
      extras: <String, Object?>{
        if (entry.sequence != null) 'sequence': entry.sequence,
        if (entry.traceId != null) 'traceId': entry.traceId,
        if (entry.spanId != null) 'spanId': entry.spanId,
        if (entry.parentSpanId != null) 'parentSpanId': entry.parentSpanId,
        ...entry.attributes,
      },
    );
  }
}

That adapter owns field mapping, redaction, filtering, batching, and any SDK-specific conventions.