Class: Console::JavaUtilLogger::RubyFormatter

Inherits:
Formatter
  • Object
show all
Defined in:
lib/color_console/java_util_logger.rb

Overview

Extends java.util.logging.Formatter, adding the ability to customise the log format at runtime, and defaulting to a simpler single-line format more suitable for output to the console.

Constant Summary collapse

DEFAULT_FORMAT =

Default format pattern

'%4$-6s  %7$s%5$s'
LINE_END =

System line-ending

java.lang.String.format('%n')

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(format = DEFAULT_FORMAT, width = nil) ⇒ RubyFormatter

Constructs a new formatter for formatting log records according to a format string.

Parameters:

  • format (defaults to: DEFAULT_FORMAT) —

    The format string to use when building a String for logging.



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# File 'lib/color_console/java_util_logger.rb', line 82

def initialize(format = DEFAULT_FORMAT, width = nil)
    super()
    @format_string = format
    @width = width || Console.width
    mark = java.lang.String.format(@format_string, Time.now,
                                   '', '', '', '!$!', nil, nil)
    @indent = mark.lines.first.index('!$!')
    @level_labels = Hash.new{ |h, k| h[k] = k }
    @level_labels[JavaUtilLogger::Level::WARNING] = 'WARN'
    @level_labels[JavaUtilLogger::Level::SEVERE] = 'ERROR'
    @level_labels[JavaUtilLogger::Level::FINEST] = 'DEBUG'
end

Instance Attribute Details

#format_string ⇒ Object

A format string to use when formatting a log record.

See Also:

  • function String.format for the format string syntax. The values passed by this formatter to String.format are: - millis The time the log event occurred - source The name of the logger that logged the record - logger_name The name of the logger that logged the record - level The level of the message - message The log message - thrown Any exception that forms part of the log record - spacer A spacer that will consist of 2 spaces if the log level is config or greater.


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# File 'lib/color_console/java_util_logger.rb', line 68

def format_string
  @format_string
end

#indent ⇒ Object

Amount by which to indent lines



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# File 'lib/color_console/java_util_logger.rb', line 72

def indent
  @indent
end

#level_labels ⇒ Object (readonly)

Level labels



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# File 'lib/color_console/java_util_logger.rb', line 74

def level_labels
  @level_labels
end

#width ⇒ Object

Width at which to split lines



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# File 'lib/color_console/java_util_logger.rb', line 70

def width
  @width
end

Instance Method Details

#format(log_record) ⇒ Object

Format a log record and return a string for publishing by a log handler.



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# File 'lib/color_console/java_util_logger.rb', line 97

def format(log_record)
    lvl = @level_labels[log_record.level]
    indent = @indent || 0
    spacer = ''
    wrap_width = @width - indent
    if log_record.level.intValue < JavaUtilLogger::Level::INFO.intValue
        spacer = '  '
        wrap_width -= 2
    end

    msg = wrap_width > 0 ? Console.wrap_text(log_record.message, wrap_width) :
        [log_record.message]
    sb = java.lang.StringBuilder.new()
    msg.each_with_index do |line, i|
        if i == 0
            fmt = java.lang.String.format(@format_string,
                                          log_record.millis,
                                          log_record.logger_name,
                                          log_record.logger_name,
                                          lvl,
                                          msg[i],
                                          log_record.thrown,
                                          spacer)
        else
            fmt = java.lang.String.format(@format_string,
                                          log_record.millis, '', '', '', msg[i], nil, spacer)
        end
        sb.append(fmt)
        sb.append(LINE_END) if @width < 0 || fmt.length < @width
    end
    sb.toString()
end