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.logging.log4j.core.async;
18
19 import java.util.concurrent.ThreadFactory;
20 import java.util.concurrent.atomic.AtomicInteger;
21
22 /**
23 * ThreadFactory that creates daemon threads for the async loggers.
24 */
25 public class DaemonThreadFactory implements ThreadFactory {
26
27 final ThreadGroup group;
28 final AtomicInteger threadNumber = new AtomicInteger(1);
29 final String threadNamePrefix;
30
31 public DaemonThreadFactory(final String threadNamePrefix) {
32 this.threadNamePrefix = threadNamePrefix;
33 final SecurityManager securityManager = System.getSecurityManager();
34 group = (securityManager != null) ? securityManager.getThreadGroup()
35 : Thread.currentThread().getThreadGroup();
36 }
37
38 @Override
39 public Thread newThread(final Runnable runnable) {
40 final Thread thread = new Thread(group, runnable, threadNamePrefix
41 + threadNumber.getAndIncrement(), 0);
42 if (!thread.isDaemon()) {
43 thread.setDaemon(true);
44 }
45 if (thread.getPriority() != Thread.NORM_PRIORITY) {
46 thread.setPriority(Thread.NORM_PRIORITY);
47 }
48 return thread;
49 }
50
51 }