api-gateway-config/scripts/lua/lib/logger.lua

-- Copyright (c) 2016 IBM. All rights reserved.
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--
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--   IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
--   FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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--- @module logger
-- Module to handle logging in a single place
-- @author Cody Walker (cmwalker), Alex Song (songs)
local utils = require "lib/utils"

local _M = {}

--- Handle error stream
-- @param s String to write to error level of log stream
function _M.err(s)
  ngx.log(ngx.ERR, s)
end

--- Handle info logs
-- @param s String to write to info level of log stream
function _M.info(s)
  ngx.log(ngx.INFO, s)
end

--- Handle debug stream to stdout
-- @param s String to write to debug stream
function _M.debug(s)
  if s == nil then
    s = "nil"
  elseif type(s) == "table" then
    s = utils.serializeTable(s)
  elseif type(s) == "boolean" then
    s = (s == true) and "true" or "false"
  end
  os.execute("echo \"" .. s .. "\"")
end

return _M