@blac/logging-plugin

Logging and debugging plugin for BlaC state management. Logs instance lifecycle, state changes, events, and monitors for potential memory issues.

Full documentation

Installation

pnpm add @blac/logging-plugin

Usage

import { getPluginManager } from '@blac/core';
import { LoggingPlugin } from '@blac/logging-plugin';

getPluginManager().install(new LoggingPlugin(), {
  environment: 'development',
});

Configuration

new LoggingPlugin({
  // Log verbosity: 'minimal' | 'info' | 'debug' | 'verbose'
  level: 'info',

  // Output format: 'simple' (one-line) | 'grouped' (console.group)
  format: 'grouped',

  // Filtering
  include: ['CounterCubit', 'CartCubit'], // Only log these classes
  exclude: ['AnalyticsCubit'], // Exclude these classes
  filter: ({ className, isIsolated }) => !isIsolated, // Custom filter

  // Feature toggles
  logLifecycle: true, // Log create/dispose
  logStateChanges: true, // Log state transitions
  includeCallstack: false, // Include callstack in logs

  // Memory monitoring
  instanceCountWarningThreshold: 50, // Warn when exceeded
  detectRapidLifecycles: true, // Detect create/dispose loops
  rapidLifecycleWindowMs: 1000, // Time window for detection
  rapidLifecycleThreshold: 5, // Cycles to trigger warning

  // State change batching
  debounceStateChanges: true, // Group rapid successive changes
  debounceWindowMs: 100, // Time window for batching

  // Customization
  prefix: '[BlaC]', // Log prefix
  logger: console, // Custom logger
});

Log Levels

| Level | Logs | | --------- | -------------------------------------------------- | | minimal | Warnings only (memory issues, suspicious activity) | | info | Lifecycle + warnings | | debug | + state changes | | verbose | + callstacks + full state objects |

Output Examples

Simple format:

[BlaC] Created CounterCubit#abc12345
[BlaC] CounterCubit#abc12345 state: 0 → 1
[BlaC] Disposed CounterCubit#abc12345 (lived 5.2s)

Grouped format:

▼ [BlaC] CounterCubit#abc12345 state changed
    Previous: 0
    Current: 1

Batched state changes (when multiple changes happen rapidly):

[BlaC] CounterCubit#abc12345 state: 0 → 5 (5 changes batched)

▼ [BlaC] CounterCubit#abc12345 state changed (5 batched)
    Initial: 0
    Final: 5
  ▼ All changes
      1. 0 → 1
      2. 1 → 2
      3. 2 → 3
      4. 3 → 4
      5. 4 → 5

Warnings:

[BlaC] ⚠️ High instance count: FormCubit has 52 instances
[BlaC] ⚠️ Rapid lifecycle: CounterCubit created/disposed 5 times in 1000ms
[BlaC] ⚠️ Unused instance: FormCubit#abc12345 disposed without state changes