On Thu, Nov 19, 2020 at 07:10:47PM +0800, Wu Zhende wrote:

[Why] The built-in log system prints logs in string format by default. The logs should be formatted in json format for subsequent analysis and processing.

[Example] require './log' log = Log.new log.info("test") output: {"level":"INFO","level_num":1,"datetime":"2020-11-19 16:57:17+0800","progname":null,"message":"test"} log.error({"job_id" => "1", "job_state" => "submit"}.to_json) output: {"level":"ERROR","level_num":3,"datetime":"2020-11-19 16:57:17+0800","progname":null,"message":"", "job_id":"1","job_state":"submit","caller":["/usr/share/ruby/logger.rb:4:in `format_message'", "/usr/share/ruby/logger.rb:472:in`add'","/usr/share/ruby/logger.rb:545:in `error'","./test.rb:6:in`<main>'"]}

Signed-off-by: Wu Zhende wuzhende666@163.com

lib/log.rb | 42 ++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 42 insertions(+) create mode 100644 lib/log.rb

diff --git a/lib/log.rb b/lib/log.rb new file mode 100644 index 0000000..0ffc0f9 --- /dev/null +++ b/lib/log.rb @@ -0,0 +1,42 @@ +# SPDX-License-Identifier: MulanPSL-2.0+ +# Copyright (c) 2020 Huawei Technologies Co., Ltd. All rights reserved. +# frozen_string_literal: true

+require 'logger' +require 'json'

+# log class to print logs in JSON format +class Log < Logger

• LEVEL_INFO = {
• 'DEBUG' => 0,
• 'INFO' => 1,
• 'WARN' => 2,
• 'ERROR' => 3,
• 'FATAL' => 4,
• 'UNKNOWN' => 5
• }.freeze

Already defined in Logger. see: /usr/share/ruby/logger.rb: Line 244

• FORMATTER = proc { |severity, datetime, progname, msg|
• puts
• level_num = LEVEL_INFO[severity]
• begin

•  message = JSON.parse(msg)
  

• rescue JSON::ParserError

•  message = { 'message' => msg }
  

• end
• h = {

•  'level' => severity.to_s,
  

•  'level_num' => level_num,
  

•  'datetime' => datetime,
  

•  'progname' => progname,
  

•  'message' => ''
  

• }
• h.merge!(message)
• h.merge!({ 'caller' => caller }) if level_num >= 2

You can use: if severity > WARN

Thanks, RenWen

• h.to_json
• }
• def initialize(logdev = STDOUT, formatter = FORMATTER)
• super(logdev, formatter: formatter)
• end

+end

2.23.0