Log Events

A log event (modelled by LogEvent) contains information at a point in time and the state of a running system.

Important properties of an event are:

Property	Description
Timestamp	The point in time when the event occurred, with microsecond or finer resolution.
Logger	Name of the logger that sent the event (e.g. a fully-qualified class name).
Level	An indication of the severity of the event.
Host	Name of the host where the event originated: important in distributed systems.
Context	Context where the event occurred, typically thread / coroutine name.
Message	A string message summarising what happened, that might be constructed from a template.
Stack trace	Details about an exception or error, if one is associated with the event.
Items	A map of useful information current at the time of the event.

Each event also has a unique ID that is printed by the internal logger for diagnostic purposes.