/* * The MIT License (MIT) * * Copyright (c) 2019 Alibaba Group * * Permission is hereby granted, free of charge, to any person obtaining a copy * of this software and associated documentation files (the "Software"), to deal * in the Software without restriction, including without limitation the rights * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell * copies of the Software, and to permit persons to whom the Software is * furnished to do so, subject to the following conditions: * * The above copyright notice and this permission notice shall be included in * all copies or substantial portions of the Software. * * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN * THE SOFTWARE. */ import 'logger.dart'; class Tracer { static final Tracer singleton = Tracer(); final Map<String, Record> _records = <String, Record>{}; Tracer(); static String mark(String unique, String tag) { Record record = singleton._records[unique]; if (record == null) { record = Record() ..unique = unique ..marks = <Mark>[]; singleton._records[unique] = record; } record.marks.add(Mark(tag, DateTime.now())); return record.toString(); } static void markAndLog(String unique, String tag) { Logger.log(mark(unique, tag)); } static String dump(String unique) => singleton._records[unique]?.toString(); } class Record { String unique; List<Mark> marks; @override String toString() { if (marks == null || marks.isEmpty) { return ''; } if (marks.length == 1) { return marks.first.tag; } Mark least = marks.first; String info = 'trace<$unique>#${least.tag}'; for (int i = 1; i < marks.length; i++) { final Mark mark = marks[i]; info = '$info=${mark.timeStamp.millisecond - least.timeStamp.millisecond}ms=>${mark.tag}'; least = mark; } return info; } } class Mark { String tag; DateTime timeStamp; Mark(this.tag, this.timeStamp); }