| /* |
| * 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 |
| * |
| * https://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.tools.ant.util; |
| |
| import java.lang.management.ManagementFactory; |
| |
| /** |
| * Process Utilities |
| * @since Ant 1.9.4 |
| */ |
| public class ProcessUtil { |
| |
| private ProcessUtil() { |
| } |
| |
| /** |
| * provide id of the current process |
| * @param fallback fallback id |
| * @return current process id |
| */ |
| public static String getProcessId(final String fallback) { |
| // Note: may fail in some JVM implementations |
| // therefore fallback has to be provided |
| |
| // something like '<pid>@<hostname>', at least in SUN / Oracle JVMs |
| final String jvmName = ManagementFactory.getRuntimeMXBean().getName(); |
| final int index = jvmName.indexOf('@'); |
| |
| if (index < 1) { |
| // part before '@' empty (index = 0) / '@' not found (index = -1) |
| return fallback; |
| } |
| |
| try { |
| return Long.toString(Long.parseLong(jvmName.substring(0, index))); |
| } catch (NumberFormatException e) { |
| // ignore |
| } |
| return fallback; |
| } |
| |
| public static void main(String[] args) { |
| System.out.println(getProcessId("<PID>")); |
| try { |
| Thread.sleep(120000); |
| } catch (Exception exc) { |
| // ignore |
| } |
| } |
| } |