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// 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.HashMap;
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 HashMap<>();
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;
}
}
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