miu-logger 0.1.5

Multiprocessing-safe domain-based logging framework with QueueListener architecture

repo = LoggingRepository(config)
queue = repo.get_queue()

Worker processes:

worker_repo = LoggingRepository(config, use_listener=False, queue=queue)
worker_repo.task.info("Worker started")

All processes log safely to the same listener and files.

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Debug Control

Only .debug() messages are conditional via debug_enabled:

config.debug_enabled = False
repo.app.debug("Won't appear")
repo.app.info("Will appear")

Useful for toggling debug messages in production.

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Output Structure

Logs are written in:

logs/
 ├─ app.log         # domain logs
 ├─ db.log
 ├─ redis.log
 ├─ debug.log       # per-level logs
 ├─ info.log
 ├─ warning.log
 └─ error.log

Console output is colorized by level:

• DEBUG → blue
• INFO → green
• WARNING → yellow
• ERROR → red

Files remain clean.

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Graceful Shutdown

The repository automatically shuts down on process exit and supports manual shutdown:

repo.shutdown()

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Typical Usage Example

repo.app.info("Service starting")

try:
    connect_db()
except Exception:
    repo.db.exception("DB connection failed")

repo.redis.debug("Cache size: %d", cache_size)

Multiprocessing workers:

def worker(queue):
    repo = LoggingRepository(config, use_listener=False, queue=queue)
    repo.task.info("Worker task started")

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Project Structure

miu_logger/
 ├─ repository.py         # main LoggingRepository
 ├─ listener.py           # QueueListener and handler setup
 ├─ logger_factory.py     # logger creation functions
 ├─ conditional.py        # ConditionalLogger
 ├─ filters.py            # Logger filters
 ├─ formatters.py         # ColoredFormatter
 ├─ config.py             # LogConfig definition
 └─ stubgen.py            # stub generator for IDE autocomplete

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When to Use

• Services with many subsystems
• Multiprocessing ingestion pipelines
• Long-running daemons
• Kubernetes / systemd services
• Need for clear operational logs

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When Not to Use

• Single-file scripts
• No multiprocessing
• No domain separation required

Plain logging is sufficient in those cases.

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License

MIT

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Author

Bruno Miura