| // Licensed under the Apache License, Version 2.0 (the 'License'); you may not |
| // use this file except in compliance with the License. You may obtain a copy of |
| // the License at |
| // |
| // http://www.apache.org/licenses/LICENSE-2.0 |
| // |
| // Unless required by applicable law or agreed to in writing, software |
| // distributed under the License is distributed on an 'AS IS' BASIS, WITHOUT |
| // WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the |
| // License for the specific language governing permissions and limitations under |
| // the License. |
| |
| 'use strict' |
| |
| const debug = require('debug')('nano/logger') |
| |
| module.exports = function logging (cfg) { |
| const log = cfg && cfg.log |
| const logStrategy = typeof log === 'function' ? log : debug |
| |
| return function logEvent (prefix) { |
| const eventId = (prefix ? prefix + '-' : '') + |
| (~~(Math.random() * 1e9)).toString(36) |
| return function log () { |
| logStrategy.call(this, eventId, [].slice.call(arguments, 0)) |
| } |
| } |
| } |