1 /*
2 * Licensed to the Apache Software Foundation (ASF) under one
3 * or more contributor license agreements. See the NOTICE file
4 * distributed with this work for additional information
5 * regarding copyright ownership. The ASF licenses this file
6 * to you under the Apache License, Version 2.0 (the
7 * "License"); you may not use this file except in compliance
8 * with the License. You may obtain a copy of the License at
9 *
10 * https://www.apache.org/licenses/LICENSE-2.0
11 *
12 * Unless required by applicable law or agreed to in writing,
13 * software distributed under the License is distributed on an
14 * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
15 * KIND, either express or implied. See the License for the
16 * specific language governing permissions and limitations
17 * under the License.
18 */
19
20 package org.apache.commons.exec;
21
22 /**
23 * Destroys all registered {@link Process} after a certain event, typically when the VM exits.
24 *
25 * @see ShutdownHookProcessDestroyer
26 */
27 public interface ProcessDestroyer {
28
29 /**
30 * Returns {@code true} if the specified {@link Process} was successfully added to the list of processes to be destroyed.
31 *
32 * @param process the process to add.
33 * @return {@code true} if the specified {@link Process} was successfully added.
34 */
35 boolean add(Process process);
36
37 /**
38 * Returns {@code true} if the specified {@link Process} was successfully removed from the list of processes to be destroyed.
39 *
40 * @param process the process to remove.
41 * @return {@code true} if the specified {@link Process} was successfully removed.
42 */
43 boolean remove(Process process);
44
45 /**
46 * Returns the number of registered processes.
47 *
48 * @return the number of register process.
49 */
50 int size();
51 }