/*
* Copyright 2009, 2010 Roger Kapsi
*
* 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.ardverk.concurrent;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicInteger;
class ExecutorUtils {
private static final long PURGE = 30L * 1000L;
private ExecutorUtils() {}
public static ScheduledThreadPoolExecutor newSingleThreadScheduledExecutor(String name) {
final ScheduledThreadPoolExecutor executor
= new ScheduledThreadPoolExecutor(
1, new DefaultThreadFactory(name));
Runnable task = new Runnable() {
@Override
public void run() {
executor.purge();
}
};
executor.scheduleWithFixedDelay(task,
PURGE, PURGE, TimeUnit.MILLISECONDS);
return executor;
}
private static class DefaultThreadFactory implements ThreadFactory {
private final AtomicInteger counter = new AtomicInteger();
private final String name;
public DefaultThreadFactory(String name) {
this.name = name;
}
private String createName() {
return name + "-" + counter.getAndIncrement();
}
@Override
public Thread newThread(Runnable r) {
return new Thread(r, createName());
}
}
}