package com.facebook.presto.jdbc.internal.airlift.concurrent;
import com.facebook.presto.jdbc.internal.guava.util.concurrent.ThreadFactoryBuilder;
import java.util.concurrent.ThreadFactory;
public final class Threads
{
private Threads() {}
/**
* Creates a {@link ThreadFactory} that creates named threads
* using the specified naming format.
*
* @param nameFormat a {@link String#format(String, Object...)}-compatible
* format string, to which a unique integer will be supplied as the single
* parameter. This integer will be unique to this instance of the
* ThreadFactory and will be assigned sequentially.
* @return the created ThreadFactory
*/
public static ThreadFactory threadsNamed(String nameFormat)
{
return new ThreadFactoryBuilder()
.setNameFormat(nameFormat)
.setThreadFactory(new ContextClassLoaderThreadFactory(Thread.currentThread().getContextClassLoader()))
.build();
}
/**
* Creates a {@link ThreadFactory} that creates named daemon threads.
* using the specified naming format.
*
* @param nameFormat see {@link #threadsNamed(String)}
* @return the created ThreadFactory
*/
public static ThreadFactory daemonThreadsNamed(String nameFormat)
{
return new ThreadFactoryBuilder()
.setNameFormat(nameFormat)
.setDaemon(true)
.setThreadFactory(new ContextClassLoaderThreadFactory(Thread.currentThread().getContextClassLoader()))
.build();
}
private static class ContextClassLoaderThreadFactory
implements ThreadFactory
{
private final ClassLoader classLoader;
public ContextClassLoaderThreadFactory(ClassLoader classLoader)
{
this.classLoader = classLoader;
}
@Override
public Thread newThread(Runnable runnable)
{
Thread thread = new Thread(runnable);
thread.setContextClassLoader(classLoader);
return thread;
}
}
}