Java EE 8 High Performance

Logging invocations

Before looking at how to properly integrate loggers into your application using some common patterns, let's see what a logger invocation will trigger.

A simple logger invocation, like logger.info(message) , can be inspected to be represented as equivalent to the following steps:

• Check if the level of the logger is active; if not, exit
• Create a log record (set the message and level, initialize the source of the log, class, method, and so on)
• Check if the message is filtered with a Filter; if the filter filters it, then exit
• For all handlers, publish the log record to the handler:
  • Check the level of the handler versus the log record level, if not compatible then exit (note: this check is often done multiple times; it ...