| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You 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 org.apache.logging.log4j.core.test.util; |
| |
| import org.apache.logging.log4j.Logger; |
| import org.apache.logging.log4j.status.StatusLogger; |
| import org.apache.logging.log4j.util.LoaderUtil; |
| import org.apache.logging.log4j.util.Strings; |
| |
| /** |
| * YourKit Java Profiler helper class. |
| */ |
| public final class Profiler { |
| private static final Logger LOGGER = StatusLogger.getLogger(); |
| |
| private static Object profiler; |
| private static Class<?> profilingModes; |
| private static Class<?> controllerClazz; |
| |
| static { |
| try { |
| controllerClazz = LoaderUtil.loadClass("com.yourkit.api.Controller"); |
| profilingModes = LoaderUtil.loadClass("com.yourkit.api.ProfilingModes"); |
| try { |
| profiler = controllerClazz.getConstructor().newInstance(); |
| } catch (final Exception e) { |
| LOGGER.error("Profiler was active, but failed.", e); |
| } |
| } |
| catch (final Exception ignored) { |
| // Ignore |
| } |
| |
| } |
| |
| private Profiler() { |
| } |
| |
| public static boolean isActive() { |
| return profiler != null; |
| } |
| |
| private static long cpuSampling() throws NoSuchFieldException, IllegalAccessException { |
| return profilingModes.getDeclaredField("CPU_SAMPLING").getLong(profilingModes); |
| } |
| |
| private static long snapshotWithoutHeap() throws NoSuchFieldException, IllegalAccessException { |
| return profilingModes.getDeclaredField("SNAPSHOT_WITHOUT_HEAP").getLong(profilingModes); |
| } |
| |
| public static void start() { |
| |
| if (profiler != null) { |
| try { |
| controllerClazz |
| .getMethod("startCPUProfiling", long.class, String.class) |
| .invoke(profiler, cpuSampling(), Strings.EMPTY); |
| } |
| catch (final Exception e) { |
| LOGGER.error("Profiler was active, but failed.", e); |
| } |
| } |
| } |
| |
| public static void stop() { |
| if (profiler != null) { |
| try { |
| controllerClazz |
| .getMethod("captureSnapshot", long.class) |
| .invoke(profiler, snapshotWithoutHeap()); |
| controllerClazz |
| .getMethod("stopCPUProfiling") |
| .invoke(profiler); |
| } |
| catch (final Exception e) { |
| LOGGER.error("Profiler was active, but failed.", e); |
| } |
| } |
| } |
| } |