6ed96ca40b
This is the next part of the migration to Flogger. This change migrates all remaining classes Flogger. This means all classes in Gerrit core now use Flogger. During this migration we try to make the log statements more consistent: - avoid string concatenation - avoid usage of String.format(...) The visibility of the slf4j library is restricted to plugins and jgit now. This avoids that we accidentally add new dependencies to slf4j. Change-Id: Ide573327315a15cde69b68b5f27934deeb790d37 Signed-off-by: Edwin Kempin <ekempin@google.com>
77 lines
2.7 KiB
Java
77 lines
2.7 KiB
Java
// Copyright (C) 2017 The Android Open Source Project
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package com.google.gerrit.metrics.proc;
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import com.google.common.flogger.FluentLogger;
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import java.lang.management.ManagementFactory;
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import java.lang.management.OperatingSystemMXBean;
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import java.lang.reflect.Method;
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import java.util.Arrays;
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class OperatingSystemMXBeanProvider {
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private static final FluentLogger logger = FluentLogger.forEnclosingClass();
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private final OperatingSystemMXBean sys;
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private final Method getProcessCpuTime;
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private final Method getOpenFileDescriptorCount;
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static class Factory {
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static OperatingSystemMXBeanProvider create() {
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OperatingSystemMXBean sys = ManagementFactory.getOperatingSystemMXBean();
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for (String name :
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Arrays.asList(
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"com.sun.management.UnixOperatingSystemMXBean",
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"com.ibm.lang.management.UnixOperatingSystemMXBean")) {
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try {
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Class<?> impl = Class.forName(name);
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if (impl.isInstance(sys)) {
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return new OperatingSystemMXBeanProvider(sys);
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}
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} catch (ReflectiveOperationException e) {
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logger.atFine().withCause(e).log("No implementation for %s", name);
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}
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}
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logger.atWarning().log("No implementation of UnixOperatingSystemMXBean found");
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return null;
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}
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}
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private OperatingSystemMXBeanProvider(OperatingSystemMXBean sys)
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throws ReflectiveOperationException {
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this.sys = sys;
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getProcessCpuTime = sys.getClass().getMethod("getProcessCpuTime", new Class<?>[] {});
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getProcessCpuTime.setAccessible(true);
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getOpenFileDescriptorCount =
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sys.getClass().getMethod("getOpenFileDescriptorCount", new Class<?>[] {});
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getOpenFileDescriptorCount.setAccessible(true);
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}
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public long getProcessCpuTime() {
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try {
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return (long) getProcessCpuTime.invoke(sys, new Object[] {});
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} catch (ReflectiveOperationException e) {
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return -1;
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}
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}
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public long getOpenFileDescriptorCount() {
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try {
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return (long) getOpenFileDescriptorCount.invoke(sys, new Object[] {});
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} catch (ReflectiveOperationException e) {
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return -1;
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}
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}
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}
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