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Log

Perfect has a built-in error logging system that allows messages to be logged at several different levels. Each log level can be routed to either the console or the system log.

The built-in log levels, in order of increasing severity:

  • debug: Log lines are preceded by [DBG]
  • info: Log lines are preceded by [INFO]
  • warning: Log lines are preceded by [WARN]
  • error: Log lines are preceded by [ERR]
  • critical: Log lines are preceded by [CRIT]
  • terminal: Log lines are preceded by [TERM]

To Log Information to the Console:

Log.debug(message: "Line 123: value \(myVar)")
Log.info(message: "At Line 123")
Log.warning(message: "Entered error handler")
Log.error(message: "Error condition: \(errorMessage)")
Log.critical(message: "Exception Caught: \(exceptionVar)")
Log.terminal(message: "Uncaught exception, terminating. \(infoVar)")

To Log Information to the System Log:

If you wish to pipe all log entries to the system log, set the Log.logger property to SysLogger() early in the application setup. Once this has been executed, all output will be logged to the System Log file, and echoed to the console.

Log.logger = SysLogger()

If you wish to change the logger process back to only the console at any point, set the property back to ConsoleLogger()

Log.logger = ConsoleLogger()