1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one or more
3 * contributor license agreements. See the NOTICE file distributed with
4 * this work for additional information regarding copyright ownership.
5 * The ASF licenses this file to You under the Apache license, Version 2.0
6 * (the "License"); you may not use this file except in compliance with
7 * the License. You may obtain a copy of the License at
8 *
9 * http://www.apache.org/licenses/LICENSE-2.0
10 *
11 * Unless required by applicable law or agreed to in writing, software
12 * distributed under the License is distributed on an "AS IS" BASIS,
13 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
14 * See the license for the specific language governing permissions and
15 * limitations under the license.
16 */
17 package org.apache.logging.log4j.util;
18
19 import java.io.File;
20 import java.io.IOException;
21 import java.lang.reflect.Method;
22
23 /**
24 * @Since 2.9
25 */
26 public class ProcessIdUtil {
27
28 public static final String DEFAULT_PROCESSID = "-";
29
30 public static String getProcessId() {
31 try {
32 // LOG4J2-2126 use reflection to improve compatibility with Android Platform which does not support JMX extensions
33 final Class<?> managementFactoryClass = Class.forName("java.lang.management.ManagementFactory");
34 final Method getRuntimeMXBean = managementFactoryClass.getDeclaredMethod("getRuntimeMXBean");
35 final Class<?> runtimeMXBeanClass = Class.forName("java.lang.management.RuntimeMXBean");
36 final Method getName = runtimeMXBeanClass.getDeclaredMethod("getName");
37
38 final Object runtimeMXBean = getRuntimeMXBean.invoke(null);
39 final String name = (String) getName.invoke(runtimeMXBean);
40 //String name = ManagementFactory.getRuntimeMXBean().getName(); //JMX not allowed on Android
41 return name.split("@")[0]; // likely works on most platforms
42 } catch (final Exception ex) {
43 try {
44 return new File("/proc/self").getCanonicalFile().getName(); // try a Linux-specific way
45 } catch (final IOException ignoredUseDefault) {
46 // Ignore exception.
47 }
48 }
49 return DEFAULT_PROCESSID;
50 }
51 }