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 */ 017package org.apache.logging.log4j.core.async; 018 019import java.util.concurrent.ThreadFactory; 020import java.util.concurrent.atomic.AtomicInteger; 021 022/** 023 * ThreadFactory that creates daemon threads for the async loggers. 024 */ 025public class DaemonThreadFactory implements ThreadFactory { 026 027 final ThreadGroup group; 028 final AtomicInteger threadNumber = new AtomicInteger(1); 029 final String threadNamePrefix; 030 031 public DaemonThreadFactory(final String threadNamePrefix) { 032 this.threadNamePrefix = threadNamePrefix; 033 final SecurityManager securityManager = System.getSecurityManager(); 034 group = (securityManager != null) ? securityManager.getThreadGroup() 035 : Thread.currentThread().getThreadGroup(); 036 } 037 038 @Override 039 public Thread newThread(final Runnable runnable) { 040 final Thread thread = new Thread(group, runnable, threadNamePrefix 041 + threadNumber.getAndIncrement(), 0); 042 if (!thread.isDaemon()) { 043 thread.setDaemon(true); 044 } 045 if (thread.getPriority() != Thread.NORM_PRIORITY) { 046 thread.setPriority(Thread.NORM_PRIORITY); 047 } 048 return thread; 049 } 050 051}