001 /* 002 * Licensed to the Apache Software Foundation (ASF) under one or more 003 * contributor license agreements. See the NOTICE file distributed with 004 * this work for additional information regarding copyright ownership. 005 * The ASF licenses this file to You under the Apache License, Version 2.0 006 * (the "License"); you may not use this file except in compliance with 007 * the License. You may obtain a copy of the License at 008 * 009 * http://www.apache.org/licenses/LICENSE-2.0 010 * 011 * Unless required by applicable law or agreed to in writing, software 012 * distributed under the License is distributed on an "AS IS" BASIS, 013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 014 * See the License for the specific language governing permissions and 015 * limitations under the License. 016 * 017 */ 018 019 package org.apache.commons.exec; 020 021 /** 022 * Destroys all registered {@link java.lang.Process} after a certain event, 023 * typically when the VM exits 024 * @see org.apache.commons.exec.ShutdownHookProcessDestroyer 025 */ 026 public interface ProcessDestroyer { 027 028 /** 029 * Returns <code>true</code> if the specified 030 * {@link java.lang.Process} was 031 * successfully added to the list of processes to be destroy. 032 * 033 * @param process 034 * the process to add 035 * @return <code>true</code> if the specified 036 * {@link java.lang.Process} was 037 * successfully added 038 */ 039 boolean add(Process process); 040 041 /** 042 * Returns <code>true</code> if the specified 043 * {@link java.lang.Process} was 044 * successfully removed from the list of processes to be destroy. 045 * 046 * @param process 047 * the process to remove 048 * @return <code>true</code> if the specified 049 * {@link java.lang.Process} was 050 * successfully removed 051 */ 052 boolean remove(Process process); 053 054 /** 055 * Returns the number of registered processes. 056 * 057 * @return the number of register process 058 */ 059 int size(); 060 }