/*
* 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.tomcat.util.threads;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
import org.apache.tomcat.util.net.Constants;
import org.apache.tomcat.util.security.PrivilegedSetTccl;
/**
* Simple task thread factory to use to create threads for an executor
* implementation.
*/
public class TaskThreadFactory implements ThreadFactory {
private final ThreadGroup group;
private final AtomicInteger threadNumber = new AtomicInteger(1);
private final String namePrefix;
private final boolean daemon;
private final int threadPriority;
public TaskThreadFactory(String namePrefix, boolean daemon, int priority) {
SecurityManager s = System.getSecurityManager();
group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
this.namePrefix = namePrefix;
this.daemon = daemon;
this.threadPriority = priority;
}
@Override
public Thread newThread(Runnable r) {
ClassLoader loader = Thread.currentThread().getContextClassLoader();
try {
// Threads should not be created by the webapp classloader
if (Constants.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(
getClass().getClassLoader());
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(
getClass().getClassLoader());
}
TaskThread t = new TaskThread(group, r, namePrefix + threadNumber.getAndIncrement());
t.setDaemon(daemon);
t.setPriority(threadPriority);
return t;
} finally {
if (Constants.IS_SECURITY_ENABLED) {
PrivilegedAction<Void> pa = new PrivilegedSetTccl(loader);
AccessController.doPrivileged(pa);
} else {
Thread.currentThread().setContextClassLoader(loader);
}
}
}
}