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 import java.util.concurrent.ThreadFactory;
23
24 /**
25 * Internal thread helper.
26 */
27 final class ThreadUtil {
28
29 /**
30 * Creates a new Thread from the given factory and prefixes it's name with a prefix and sets the daemon flag.
31 *
32 * @param threadFactory the thread factory.
33 * @param runnable The runnable to thread.
34 * @param prefix the thread name prefix
35 * @param daemon marks this thread as a daemon thread
36 * @return constructed thread, or {@code null} if the request to create a thread is rejected
37 */
38 static Thread newThread(final ThreadFactory threadFactory, final Runnable runnable, final String prefix, final boolean daemon) {
39 final Thread thread = threadFactory.newThread(runnable);
40 if (thread == null) {
41 throw new IllegalStateException(String.format("The ThreadFactory %s cound not construct a thread for '%s'", threadFactory, prefix));
42 }
43 thread.setName(prefix + thread.getName());
44 thread.setDaemon(daemon);
45 return thread;
46 }
47
48 private ThreadUtil() {
49 // empty
50 }
51 }