org.apache.logging.log4j.util.ProcessIdUtil Maven / Gradle / Ivy
/*
* 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.util;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Method;
/**
* Provides the PID of the current JVM.
*
* @since 2.9
*/
public class ProcessIdUtil {
public static final String DEFAULT_PROCESSID = "-";
public static String getProcessId() {
try {
// LOG4J2-2126 use reflection to improve compatibility with Android Platform which does not support JMX
// extensions
final Class managementFactoryClass = Class.forName("java.lang.management.ManagementFactory");
final Method getRuntimeMXBean = managementFactoryClass.getDeclaredMethod("getRuntimeMXBean");
final Class runtimeMXBeanClass = Class.forName("java.lang.management.RuntimeMXBean");
final Method getName = runtimeMXBeanClass.getDeclaredMethod("getName");
final Object runtimeMXBean = getRuntimeMXBean.invoke(null);
final String name = (String) getName.invoke(runtimeMXBean);
// Split into first@rest
return name.split("@", 2)[0]; // likely works on most platforms
} catch (final Exception ex) {
try {
return new File("/proc/self").getCanonicalFile().getName(); // try a Linux-specific way
} catch (final IOException ignoredUseDefault) {
// Ignore exception.
}
}
return DEFAULT_PROCESSID;
}
}