| // Copyright 2021 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.platform; |
| |
| import com.google.devtools.build.lib.events.ExtendedEventHandler; |
| |
| /** |
| * This event is fired from {@link |
| * com.google.devtools.build.lib.platform.SystemMemoryPressureModule#memoryPressureCallback} to |
| * indicate that a memory pressure event has occurred. |
| */ |
| public class SystemMemoryPressureEvent implements ExtendedEventHandler.Postable { |
| |
| /** The possible reasons a system could be suspended. */ |
| public enum Level { |
| WARNING("Warning"), |
| CRITICAL("Critical"); |
| |
| private final String logString; |
| |
| Level(String logString) { |
| this.logString = logString; |
| } |
| |
| public String logString() { |
| return logString; |
| } |
| |
| /** These constants are mapped to enum in third_party/bazel/src/main/native/unix_jni.h. */ |
| static Level fromInt(int number) { |
| switch (number) { |
| case 0: |
| return WARNING; |
| case 1: |
| return CRITICAL; |
| default: |
| throw new IllegalStateException("Unknown memory pressure level: " + number); |
| } |
| } |
| }; |
| |
| private final Level level; |
| |
| public SystemMemoryPressureEvent(int level) { |
| this.level = Level.fromInt(level); |
| } |
| |
| public Level level() { |
| return level; |
| } |
| |
| public String logString() { |
| return "SystemMemoryPressureEvent: " + level.logString(); |
| } |
| } |