org.jboss.threads.JBossThreadFactory Maven / Gradle / Ivy
Go to download
This artifact provides a single jar that contains all classes required to use remote EJB and JMS, including
all dependencies. It is intended for use by those not using maven, maven users should just import the EJB and
JMS BOM's instead (shaded JAR's cause lots of problems with maven, as it is very easy to inadvertently end up
with different versions on classes on the class path).
/*
* JBoss, Home of Professional Open Source.
* Copyright 2017 Red Hat, Inc., and individual contributors
* as indicated by the @author tags.
*
* Licensed 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.jboss.threads;
import java.security.AccessController;
import java.security.PrivilegedAction;
import java.security.AccessControlContext;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicLong;
/**
* A factory for {@link JBossThread} instances.
*/
public final class JBossThreadFactory implements ThreadFactory {
private final ThreadGroup threadGroup;
private final Boolean daemon;
private final Integer initialPriority;
private final Thread.UncaughtExceptionHandler uncaughtExceptionHandler;
private final Long stackSize;
private final String namePattern;
private final AtomicLong factoryThreadIndexSequence = new AtomicLong(1L);
private final long factoryIndex;
private final AccessControlContext creatingContext;
private static final AtomicLong globalThreadIndexSequence = new AtomicLong(1L);
private static final AtomicLong factoryIndexSequence = new AtomicLong(1L);
/**
* Construct a new instance. The access control context of the calling thread will be the one used to create
* new threads if a security manager is installed.
*
* @param threadGroup the thread group to assign threads to by default (may be {@code null})
* @param daemon whether the created threads should be daemon threads, or {@code null} to use the thread group's setting
* @param initialPriority the initial thread priority, or {@code null} to use the thread group's setting
* @param namePattern the name pattern string
* @param uncaughtExceptionHandler the uncaught exception handler, if any
* @param stackSize the JVM-specific stack size, or {@code null} to leave it unspecified
*/
public JBossThreadFactory(ThreadGroup threadGroup, final Boolean daemon, final Integer initialPriority, String namePattern, final Thread.UncaughtExceptionHandler uncaughtExceptionHandler, final Long stackSize) {
if (threadGroup == null) {
final SecurityManager sm = System.getSecurityManager();
threadGroup = sm != null ? sm.getThreadGroup() : Thread.currentThread().getThreadGroup();
}
this.threadGroup = threadGroup;
this.daemon = daemon;
this.initialPriority = initialPriority;
this.uncaughtExceptionHandler = uncaughtExceptionHandler;
this.stackSize = stackSize;
factoryIndex = factoryIndexSequence.getAndIncrement();
if (namePattern == null) {
namePattern = "pool-%f-thread-%t";
}
this.namePattern = namePattern;
this.creatingContext = AccessController.getContext();
}
/**
* @deprecated Use {@link #JBossThreadFactory(ThreadGroup, Boolean, Integer, String, Thread.UncaughtExceptionHandler, Long)} instead.
*/
public JBossThreadFactory(ThreadGroup threadGroup, final Boolean daemon, final Integer initialPriority, String namePattern, final Thread.UncaughtExceptionHandler uncaughtExceptionHandler, final Long stackSize, final AccessControlContext ignored) {
this(threadGroup, daemon, initialPriority, namePattern, uncaughtExceptionHandler, stackSize);
}
public Thread newThread(final Runnable target) {
final AccessControlContext context;
if ((context = creatingContext) != null) {
return AccessController.doPrivileged(new ThreadCreateAction(target), context);
} else {
return createThread(target);
}
}
private final class ThreadCreateAction implements PrivilegedAction {
private final Runnable target;
private ThreadCreateAction(final Runnable target) {
this.target = target;
}
public Thread run() {
return createThread(target);
}
}
private Thread createThread(final Runnable target) {
final ThreadNameInfo nameInfo = new ThreadNameInfo(globalThreadIndexSequence.getAndIncrement(), factoryThreadIndexSequence.getAndIncrement(), factoryIndex);
final JBossThread thread;
if (stackSize != null) {
thread = new JBossThread(threadGroup, target, "", stackSize.longValue());
} else {
thread = new JBossThread(threadGroup, target);
}
thread.setThreadNameInfo(nameInfo);
thread.setName(nameInfo.format(thread, namePattern));
if (initialPriority != null) thread.setPriority(initialPriority.intValue());
if (daemon != null) thread.setDaemon(daemon.booleanValue());
if (uncaughtExceptionHandler != null) thread.setUncaughtExceptionHandler(uncaughtExceptionHandler);
JBossExecutors.clearContextClassLoader(thread);
return thread;
}
}