log4mongo 1.2

mongo database handler for python logging

log4mongo-python is mongo database handler for python logging, part of log4mongo.org project. log4mongo-python is using pymongo driver - http://github.com/mongodb/mongo-python-driver

Requirements

• python 2.7+

• pymongo

• mongo database

For more information see debian_requirements.txt and requirements.txt files.

Configuration

Example handler python configuration:

import logging
from log4mongo.handlers import MongoHandler

logger = logging.getLogger('test')
logger.addHandler(MongoHandler(host='localhost'))
logger.warning('test')

Contextual information

It is possible to decorate you document with contextual information. There are tow approaches.

1.) approach

import logging
from log4mongo.handlers import MongoHandler

handler = MongoHandler(host='localhost')
logger = logging.getLogger('test')
logger.addHandler(handler)
logging.LoggerAdapter(logger, {'ip': '127.0.0.1'}).info('test')

2.) approach

import logging
from log4mongo.handlers import MongoHandler

handler = MongoHandler(host='localhost')
logger = logging.getLogger('test')
logger.addHandler(handler)
logger.info('test', extra={'ip': '127.0.0.1'})

As you can see, second approach is more straightforward and there is no need to use LoggerAdapter.

Capped collections

Capped collections are fixed-size collections that support high-throughput operations that insert, retrieve, and delete documents based on insertion order. Capped collections work in a way similar to circular buffers: once a collection fills its allocated space, it makes room for new documents by overwriting the oldest documents in the collection.

Before switching to capped collections, read this document please: http://docs.mongodb.org/manual/core/capped-collections/

This behaviour is disabled by default. You can enable this behaviour in constructor with capped=True:

import logging
from log4mongo.handlers import MongoHandler

handler = MongoHandler(host='localhost', capped=True)

Tests

Tested on evnironment

• Xubuntu Linux Ubuntu 12.04.1 LTS 64-bit

• python 2.7.3+

• pymongo 2.4.1

• mongod - db version v2.0.4, pdfile version 4.5

• python unittest

Running tests

Before you run the test you must start mongo database. You will do so by this command:

$ mongod --dbpath /tmp/

To run the test run command:

$ python test.py
$ python setup.py test

Author

char0n (Vladimír Gorej, CodeScale s.r.o.)

email: [e-mail]

web: http://www.codescale.net

References

• http://www.mongodb.org/

• http://docs.python.org/library/logging.html

• http://github.com/mongodb/mongo-python-driver

• http://log4mongo.org