| // Copyright 2014 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.lib.runtime; |
| |
| import com.google.devtools.build.lib.util.BlazeClock; |
| |
| import java.lang.management.GarbageCollectorMXBean; |
| import java.lang.management.ManagementFactory; |
| import java.util.Date; |
| |
| /** |
| * Base class for Command events that includes some resource fields. |
| */ |
| public abstract class CommandEvent { |
| |
| private final long eventTimeInNanos; |
| private final long eventTimeInEpochTime; |
| private final long gcTimeInMillis; |
| |
| protected CommandEvent() { |
| eventTimeInNanos = BlazeClock.nanoTime(); |
| eventTimeInEpochTime = new Date().getTime(); |
| gcTimeInMillis = collectGcTimeInMillis(); |
| } |
| |
| /** |
| * Returns time spent in garbage collection since the start of the JVM process. |
| */ |
| private static long collectGcTimeInMillis() { |
| long gcTime = 0; |
| for (GarbageCollectorMXBean gcBean : ManagementFactory.getGarbageCollectorMXBeans()) { |
| gcTime += gcBean.getCollectionTime(); |
| } |
| return gcTime; |
| } |
| |
| /** |
| * Get the time-stamp in ns for the event. |
| */ |
| public long getEventTimeInNanos() { |
| return eventTimeInNanos; |
| } |
| |
| /** |
| * Get the time-stamp as epoch-time for the event. |
| */ |
| public long getEventTimeInEpochTime() { |
| return eventTimeInEpochTime; |
| } |
| |
| /** |
| * Get the cumulative GC time for the event. |
| */ |
| public long getGCTimeInMillis() { |
| return gcTimeInMillis; |
| } |
| } |