io.ebeaninternal.server.lib.DaemonThreadFactory Maven / Gradle / Ivy
package io.ebeaninternal.server.lib;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.atomic.AtomicInteger;
/**
* ThreadFactory for Daemon threads.
*
* Daemon threads do not stop a JVM stopping. If an application only has Daemon
* threads left it will shutdown.
*
*
* In using Daemon threads you need to either not care about being interrupted
* on shutdown or register with the JVM shutdown hook to perform a nice shutdown
* of the daemon threads etc.
*
*
* @author rbygrave
*/
public class DaemonThreadFactory implements ThreadFactory {
private static final AtomicInteger poolNumber = new AtomicInteger(1);
private final ThreadGroup group;
private final AtomicInteger threadNumber = new AtomicInteger(1);
private final String namePrefix;
public DaemonThreadFactory(String namePrefix) {
SecurityManager s = System.getSecurityManager();
this.group = (s != null) ? s.getThreadGroup() : Thread.currentThread().getThreadGroup();
this.namePrefix = namePrefix != null ? namePrefix : "pool-" + poolNumber.getAndIncrement() + "-thread-";
}
@Override
public Thread newThread(Runnable r) {
Thread t = new Thread(group, r, namePrefix + threadNumber.getAndIncrement(), 0);
t.setDaemon(true);
if (t.getPriority() != Thread.NORM_PRIORITY) {
t.setPriority(Thread.NORM_PRIORITY);
}
return t;
}
}