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# frozen_string_literal: true
module RailwayIpc
# Custom logger that accepts a `device`, `level`, and `formatter`.
# `formatter` can be any object that responds to `call`; a
# `Logger::Formatter` is used if the argument is not provided.
#
# Here is an example formatter that uses `Oj` to format structured log
# messages:
#
# require 'oj'
# OjFormatter = proc do |severity, datetime, progname, data|
# data.merge!(
# name: progname,
# timestamp: datetime,
# severity: severity
# )
# Oj.dump(data, { mode: :compat, time_format: :xmlschema })
# end
#
# logger = RailwayIpc::Logger.new(STDOUT, Logger::INFO, OjFormatter)
#
class Logger
def initialize(device=STDOUT, level=::Logger::INFO, formatter=nil)
@logger = ::Logger.new(device)
@logger.level = level
@logger.formatter = formatter if formatter
end
%w[fatal error warn info debug].each do |level|
define_method(level) do |message=nil, data={}, &block|
data.merge!(feature: 'railway_ipc') unless data.key?(:feature)
return logger.send(level, data.merge(message: message)) unless block
data = message.merge(data) if message&.is_a?(Hash)
data.merge!(message: block.call)
# This is for compatability w/ Ruby's Logger. Ruby's Logger class
# assumes that if both a `message` argument and a block are given,
# that the block contains the actual message. The `message` argument
# is assumed to be the `progname`.
#
# https://github.com/ruby/logger/blob/master/lib/logger.rb#L471
data.merge!(progname: message) if message&.is_a?(String)
logger.send(level, data)
end
end
private
attr_reader :logger
end
end
Version data entries
5 entries across 5 versions & 1 rubygems