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nasa_common_logging repository

Repository Summary

Checkout URI https://gitlab.com/nasa-jsc-robotics/nasa_common_logging.git
VCS Type git
VCS Version develop
Last Updated 2021-02-19
Dev Status MAINTAINED
CI status No Continuous Integration
Released UNRELEASED
Tags No category tags.
Contributing Help Wanted (0)
Good First Issues (0)
Pull Requests to Review (0)

Packages

Name Version
nasa_common_logging 3.4.0

README

nasa_common_logging

About

See package.xml for version and maintainer information.

See LICENSE.md for complete license information.

This C++ library and Python package provide a standard way to instantiate, configure, and use logging. The C++ system provides a singleton Logger class as a front-end for log4cpp. The Python system provides methods that help load a common or custom configuration into the standard logging infrastructure.

C++ Example

    #include "nasa_common_logging/Logger.h"

    int main(int argc, char** argv)
    {
        // use log() for simple messages
        // requires a category that describes the source of the log message, then a severity level, then a standard std::string message.
        NasaCommonLogging::Logger::log("gov.nasa.nasa_common_logging.logdemo", log4cpp::Priority::WARN, "This is a warning!");

        // use getCategory() for streamed messages
        // requires a category that describes the source of the log messages, then a severity level, then any number of stream objects
        NasaCommonLogging::Logger::getCategory("gov.nasa.nasa_common_logging.logdemo") << log4cpp::Priority::ERROR << "This is error: " << 42;

        return 0;
    }

Python Examples

Using nasa_common_logging defaults:

    import logging
    import nasa_common_logging    

    nasa_common_logging.logging_utils.configure_common_logging()

    logger = logging.getLogger(__name__)

    logger.info('hello world')
    logger.log(nasa_common_logging.log_level['error'], 'hey world!')

    sublog = logger.getChild('sub')
    sublog.log(nasa_common_logging.log_level['CRITICAL'], 'for real, world, where you at?!')

    my_custom_logging_config = nasa_common_logging.logging_utils.get_common_logging_configuration()
    my_custom_logging_config['handlers']['console']['formatter'] = 'brief'
    nasa_common_logging.logging_utils.configure_custom_logging(my_custom_logging_config)
    logger.log(nasa_common_logging.log_level['warn'], 'custom log format')

Using nasa_common_logging loading a custom config file:

    #!/usr/bin/env python
    import logging
    import nasa_common_logging

    import os
    import rospkg
    ncl_path = rospkg.RosPack().get_path('nasa_common_logging')
    config_file = os.path.join(ncl_path, 'share', 'logging.json')
    nasa_common_logging.logging_utils.configure_custom_logging_file(config_file)

Using nasa_common_logging, overriding the defaults:

    import logging
    import nasa_common_logging

    # Set the log level:
    nasa_common_logging.configure_common_logging(level='WARNING')

    # Override the handlers to only use a syslog and file handler
    # All options are 'syslog', 'file', 'socket', and 'console'
    nasa_common_logging.configure_common_logging(handlers=['console', 'file'])

    # Override the file path.  This will log to `~/.log/myApp.log`
    nasa_common_logging.configure_common_logging(file_path='myApp.log')

    # This will log to `/usr/local/log/myApp.log`
    nasa_common_logging.configure_common_logging(file_path='/usr/local/log/myApp.log')

    logger = logging.getLogger(__name__)
    logger.info('hello world!')

One could also grab the default config, modify it, and set it. The config is a python dictionary.

    import logging
    import nasa_common_logging

    config = nasa_common_logging.get_common_logging_configuration()
    config['root']['level'] = 'WARNING'
    config['root']['handlers'].append('file')
    nasa_common_logging.configure_custom_logging(config)

CONTRIBUTING

No CONTRIBUTING.md found.