| // Copyright 2017 The Bazel Authors. All rights reserved. |
| // |
| // 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. |
| |
| package com.google.devtools.build.android; |
| |
| import com.google.common.base.Preconditions; |
| import com.google.common.base.Stopwatch; |
| import java.util.LinkedHashMap; |
| import java.util.Map; |
| import java.util.concurrent.TimeUnit; |
| import java.util.logging.Logger; |
| |
| /** Logs timing data to the logger. */ |
| public class LoggingProfiler implements Profiler { |
| |
| private final Logger logger = Logger.getLogger(LoggingProfiler.class.getName()); |
| private final Map<String, Stopwatch> tasks = new LinkedHashMap<>(); |
| |
| private LoggingProfiler() {} |
| |
| public static Profiler createAndStart(String taskName) { |
| final LoggingProfiler profiler = new LoggingProfiler(); |
| return profiler.startTask(taskName); |
| } |
| |
| @Override |
| public Profiler startTask(String taskName) { |
| Preconditions.checkArgument(!tasks.containsKey(taskName)); |
| tasks.put(taskName, Stopwatch.createStarted()); |
| return this; |
| } |
| |
| @Override |
| public Profiler recordEndOf(String taskName) { |
| Preconditions.checkArgument(tasks.containsKey(taskName)); |
| final Stopwatch task = tasks.remove(taskName); |
| logger.finer(String.format("%s in %ss", taskName, task.elapsed(TimeUnit.MILLISECONDS) / 1000f)); |
| return this; |
| } |
| } |