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.commons.exec;
18
19 import java.io.File;
20 import java.util.concurrent.ThreadFactory;
21
22 /**
23 * Runs daemon processes asynchronously. Callers are expected to register a {@link ProcessDestroyer} before executing any processes.
24 *
25 * @since 1.3
26 */
27 public class DaemonExecutor extends DefaultExecutor {
28
29 /**
30 * Constructs a new builder.
31 *
32 * @since 1.4.0
33 */
34 public static class Builder extends DefaultExecutor.Builder<Builder> {
35
36 /**
37 * Creates a new configured DaemonExecutor.
38 *
39 * @return a new configured DaemonExecutor.
40 */
41 @Override
42 public DefaultExecutor get() {
43 return new DaemonExecutor(getThreadFactory(), getExecuteStreamHandler(), getWorkingDirectory());
44 }
45
46 }
47
48 /**
49 * Creates a new builder.
50 *
51 * @return a new builder.
52 * @since 1.4.0
53 */
54 public static Builder builder() {
55 return new Builder();
56 }
57
58 /**
59 * Constructs a new instance.
60 *
61 * @deprecated Use {@link Builder#get()}.
62 */
63 @Deprecated
64 public DaemonExecutor() {
65 // super
66 }
67
68 private DaemonExecutor(final ThreadFactory threadFactory, final ExecuteStreamHandler executeStreamHandler, final File workingDirectory) {
69 super(threadFactory, executeStreamHandler, workingDirectory);
70 }
71
72 /**
73 * Factory method to create a thread waiting for the result of an asynchronous execution.
74 *
75 * @param runnable the runnable passed to the thread.
76 * @param name the name of the thread.
77 * @return the thread.
78 */
79 @Override
80 protected Thread createThread(final Runnable runnable, final String name) {
81 final Thread thread = super.createThread(runnable, name);
82 thread.setDaemon(true);
83 return thread;
84 }
85 }