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Documentation for aiolog

aiolog provides a special stream class with the following features:

  • RAM based (io.StringIO) circular buffer. This allows to preallocate a certain amount of RAM dedicated to logging, and the log will rotate seamlessly when the max size is reached.
  • Interactively inspect its content same as using cat with * wildcard matching.
  • Interactively follow its content asynchronously, similarly as using tail -F, and also with * wildcard matching.
  • Can be used with micropython-lib/python-stdlib/logging as a stream.

Usage

The class is AioStream, and is easily set up as e.g.

streamlog = Aiostream(2000) 

# this is by default included in aiolog, to do e.g. from aiolog import streamlog

Adding AioStream to aioctl

Use aioctl.set_log as e.g.

aioctl.set_log(streamlog)

So now the contents can be inspected using aioctl.log() or await aioctl.follow()

Adding AioStream to micropython logging

streamlog can be added as a stream as e.g.

import logging
import sys
import aioctl
from aiolog import streamlog 

aioctl.set_log(streamlog)

logging.basicConfig(
    level=logging.INFO,
    format="%(asctime)s [%(name)s] [%(levelname)s] %(message)s",
    datefmt="%Y-%m-%d %H:%M:%S", # micropython-lib/python-stdlib/time required
    stream=streamlog,
)
log = logging.getLogger(sys.platform)

or if using handlers1

formatter = logging.Formatter("%(asctime)s [%(name)s] [%(levelname)s] %(message)s")
# Stream
stream_handler = logging.StreamHandler(stream=streamlog)
stream_handler.setLevel(logging.INFO)
stream_handler.setFormatter(formatter)
log.addHandler(stream_handler)

Log inspection

e.g.

--> aioctl.log()
2023-03-29 12:16:30 [pyboard] [INFO] [hello.service] LED 2 toggled!
2023-03-29 12:16:32 [pyboard] [INFO] [hello.service] LED 2 toggled!
2023-03-29 12:16:34 [pyboard] [INFO] [hello.service] LED 3 toggled!
2023-03-29 12:16:36 [pyboard] [INFO] [hello.service] LED 4 toggled!
2023-03-29 12:16:38 [pyboard] [INFO] [hello.service] LED 1 toggled!
2023-03-29 12:16:40 [pyboard] [INFO] [hello.service] LED 3 toggled!
2023-03-29 12:16:42 [pyboard] [INFO] [hello.service] LED 4 toggled!
2023-03-29 12:16:44 [pyboard] [INFO] [hello.service] LED 4 toggled!
2023-03-29 12:16:44 [pyboard] [ERROR] [hello.service] ZeroDivisionError: divide by zero
2023-03-29 12:16:45 [pyboard] [ERROR] [hello.service] Error callback divide by zero
2023-03-29 12:17:11 [pyboard] [INFO] [watcher.service] Error @ Task hello.service ZeroDivisionError: divide by zero
2023-03-29 12:17:11 [pyboard] [INFO] [watcher.service] Restarting Task hello.service
2023-03-29 12:17:11 [pyboard] [INFO] [hello.service] LED 3 toggled!
2023-03-29 12:17:13 [pyboard] [INFO] [hello.service] LED 1 toggled!
2023-03-29 12:17:15 [pyboard] [INFO] [hello.service] LED 4 toggled!
2023-03-29 12:17:17 [pyboard] [INFO] [hello.service] LED 2 toggled!
-->

Footnotes

  1. Check out logging_handlers directory for custom handlers too .e.g FileRotationHandler ↩