logger

Package core4.logger implements all components required for the core4 logging system.

core4 uses the Python standard logging module to deliver the following features:

• configuration of a console log handler (STDERR and STDOUT)
• configuration of centralised logging into MongoDB collection sys.log (see MongoLoggingHandler)
• custom configuration of package and module logging

There are various extra attributes passed by a custom logging adapter CoreLoggingAdapter and saved into MongoDB collection sys.log by a custom logging handler MongoLoggingHandler. See MongoLoggingHandler for a list of attributes.

All classes inherited from CoreBase feature this logging. All application objects need to mixin CoreLoggerMixin and call CoreLoggerMixin.setup_logging() to start logging as specified in section logging (see logging).

• mixin
• handler
• adapter
• filter
• exception handler