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 022import org.apache.logging.log4j.core.util.Log4jThread; 023 024/** 025 * ThreadFactory that creates daemon threads for the async loggers. 026 */ 027public class DaemonThreadFactory implements ThreadFactory { 028 029 private static final AtomicInteger THREAD_NUMBER = new AtomicInteger(1); 030 private final ThreadGroup group; 031 private final String threadNamePrefix; 032 033 public DaemonThreadFactory(final String threadNamePrefix) { 034 this.threadNamePrefix = threadNamePrefix; 035 final SecurityManager securityManager = System.getSecurityManager(); 036 group = (securityManager != null) ? securityManager.getThreadGroup() 037 : Thread.currentThread().getThreadGroup(); 038 } 039 040 @Override 041 public Thread newThread(final Runnable runnable) { 042 final Thread thread = new Log4jThread(group, runnable, threadNamePrefix 043 + THREAD_NUMBER.getAndIncrement(), 0); 044 if (!thread.isDaemon()) { 045 thread.setDaemon(true); 046 } 047 if (thread.getPriority() != Thread.NORM_PRIORITY) { 048 thread.setPriority(Thread.NORM_PRIORITY); 049 } 050 return thread; 051 } 052 053}