| // Copyright (C) 2017 The Android Open Source Project |
| // |
| // 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.gerrit.metrics.proc; |
| |
| import com.google.common.flogger.FluentLogger; |
| import com.sun.management.UnixOperatingSystemMXBean; |
| import java.lang.management.ManagementFactory; |
| import java.lang.management.OperatingSystemMXBean; |
| import java.util.Arrays; |
| |
| class OperatingSystemMXBeanFactory { |
| private static final FluentLogger logger = FluentLogger.forEnclosingClass(); |
| |
| private OperatingSystemMXBeanFactory() {} |
| |
| static OperatingSystemMXBeanInterface create() { |
| OperatingSystemMXBean sys = ManagementFactory.getOperatingSystemMXBean(); |
| if (sys instanceof UnixOperatingSystemMXBean) { |
| return new OperatingSystemMXBeanUnixNative((UnixOperatingSystemMXBean) sys); |
| } |
| |
| for (String name : |
| Arrays.asList( |
| "com.sun.management.UnixOperatingSystemMXBean", |
| "com.ibm.lang.management.UnixOperatingSystemMXBean")) { |
| try { |
| Class<?> impl = Class.forName(name); |
| if (impl.isInstance(sys)) { |
| return new OperatingSystemMXBeanReflectionBased(sys); |
| } |
| } catch (ReflectiveOperationException e) { |
| logger.atFine().withCause(e).log("No implementation for %s", name); |
| } |
| } |
| logger.atWarning().log("No implementation of UnixOperatingSystemMXBean found"); |
| return null; |
| } |
| } |