MultipleDevicesLogger

Logger that support many and different devices for specified levels.

Just add this into your Gemfile:

gem 'multiple_devices_logger'

Then, just run a bundle install.

This will add STDOUT device for debug and info severities and a file for all others.

require 'multiple_devices_logger'

logger = MultipleDevicesLogger.new
logger.add_device(STDOUT, Logger::DEBUG, Logger::INFO)
logger.add_device('/tmp/logs', Logger::WARN, Logger::ERROR, Logger::FATAL)
logger.warn('BAM!')

Note that severty can specified as string or symbol.

If there is no device for given severity, default device is used. It can be defined thanks to default_device accessor.

logger.default_device = STDERR

If you don't specify any severity to #add_device method, specified device will be added to all sevrities.

Here is an example that logs all messages to STDERR and fatal messages to both a file and STDERR.

logger.add_device(STDERR)
logger.add_device('/tmp/fatal.log', :fatal)

To simplify devices definition, you can use >, >=, <, <= operators:

logger.add_device('/var/log/myapp.log', '>= warn')

Just use #clear_devices to clear all registered devices:

logger.clear_devices

You can configure a formatter for each device via :formatter option, here is an example:

logger.add_device(STDERR, :debug, formatter: -> (severity, time, progname, message) { "[#{severity}] #{message}\n" })

Otherwise default formatter is used.

You can ignore some exceptions to be logged globally:

logger.ignore_exceptions(IOError, ArgumentError)

Or just for some devices with :ignore_exceptions otpion when you register the device:

logger.add_device(STDERR, :debug, ignore_exceptions: [IOError, ArgumentError])

In addition to classes, A lambda can be given to ignore exception, example:

logger.ignore_exceptions(ArgumentError, -> (e) { e.message =~ /404/ }

This project is fully tested with Rspec 3. Just run bundle exec rake (after a bundle install).