| /* |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache license, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the license for the specific language governing permissions and |
| * limitations under the license. |
| */ |
| |
| package org.apache.logging.log4j.core.util; |
| |
| import java.util.concurrent.ThreadFactory; |
| import java.util.concurrent.atomic.AtomicInteger; |
| |
| /** |
| * Creates {@link Log4jThread}s. |
| * |
| * @since 2.7 |
| */ |
| public class Log4jThreadFactory implements ThreadFactory { |
| |
| private static final String PREFIX = "TF-"; |
| |
| /** |
| * Creates a new daemon thread factory. |
| * |
| * @param threadFactoryName |
| * The thread factory name. |
| * @return a new daemon thread factory. |
| */ |
| public static Log4jThreadFactory createDaemonThreadFactory(final String threadFactoryName) { |
| return new Log4jThreadFactory(threadFactoryName, true, Thread.NORM_PRIORITY); |
| } |
| |
| /** |
| * Creates a new thread factory. |
| * |
| * This is mainly used for tests. Production code should be very careful with creating |
| * non-daemon threads since those will block application shutdown |
| * (see https://issues.apache.org/jira/browse/LOG4J2-1748). |
| * |
| * @param threadFactoryName |
| * The thread factory name. |
| * @return a new daemon thread factory. |
| */ |
| public static Log4jThreadFactory createThreadFactory(final String threadFactoryName) { |
| return new Log4jThreadFactory(threadFactoryName, false, Thread.NORM_PRIORITY); |
| } |
| |
| private static final AtomicInteger FACTORY_NUMBER = new AtomicInteger(1); |
| private static final AtomicInteger THREAD_NUMBER = new AtomicInteger(1); |
| private final boolean daemon; |
| private final ThreadGroup group; |
| private final int priority; |
| private final String threadNamePrefix; |
| |
| /** |
| * Constructs an initialized thread factory. |
| * |
| * @param threadFactoryName |
| * The thread factory name. |
| * @param daemon |
| * Whether to create daemon threads. |
| * @param priority |
| * The thread priority. |
| */ |
| public Log4jThreadFactory(final String threadFactoryName, final boolean daemon, final int priority) { |
| this.threadNamePrefix = PREFIX + FACTORY_NUMBER.getAndIncrement() + "-" + threadFactoryName + "-"; |
| this.daemon = daemon; |
| this.priority = priority; |
| final SecurityManager securityManager = System.getSecurityManager(); |
| this.group = securityManager != null ? securityManager.getThreadGroup() |
| : Thread.currentThread().getThreadGroup(); |
| } |
| |
| @Override |
| public Thread newThread(final Runnable runnable) { |
| // Log4jThread prefixes names with "Log4j2-". |
| final Thread thread = new Log4jThread(group, runnable, threadNamePrefix + THREAD_NUMBER.getAndIncrement(), 0); |
| if (thread.isDaemon() != daemon) { |
| thread.setDaemon(daemon); |
| } |
| if (thread.getPriority() != priority) { |
| thread.setPriority(priority); |
| } |
| return thread; |
| } |
| |
| } |