method

add

v1_9_2_180 - Show latest stable - 0 notes - Class: Logger

add(severity, message = nil, progname = nil, &block) public

Synopsis

Logger#add(severity, message = nil, progname = nil) { ... }

Args

`severity`	Severity. Constants are defined in Logger namespace: `DEBUG,` `INFO,` `WARN,` `ERROR,` `FATAL,` or `UNKNOWN`.
`message`	The log message. A String or Exception.
`progname`	Program name string. Can be omitted. Treated as a message if no `message` and `block` are given.
`block`	Can be omitted. Called to get a message string if `message` is nil.

Return

true if successful, false otherwise.

When the given severity is not high enough (for this particular logger), log no message, and return true.

Description

Log a message if the given severity is high enough. This is the generic logging method. Users will be more inclined to use #debug, #info, #warn, #error, and #fatal.

Message format: message can be any object, but it has to be converted to a String in order to log it. Generally, inspect is used if the given object is not a String. A special case is an Exception object, which will be printed in detail, including message, class, and backtrace. See #msg2str for the implementation if required.

Bugs

Logfile is not locked.
Append open does not need to lock file.
But on the OS which supports multi I/O, records possibly be mixed.

Show source

# File lib/logger.rb, line 324
  def add(severity, message = nil, progname = nil, &block)
    severity ||= UNKNOWN
    if @logdev.nil? or severity < @level
      return true
    end
    progname ||= @progname
    if message.nil?
      if block_given?
        message = yield
      else
        message = progname
        progname = @progname
      end
    end
    @logdev.write(
      format_message(format_severity(severity), Time.now, progname, message))
    true
  end

add

Related methods

Synopsis

Args

Return

Description

Bugs