/**
* 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 com.leansoft.luxun.utils;
import java.util.concurrent.ScheduledFuture;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadFactory;
import java.util.concurrent.TimeUnit;
import java.util.concurrent.atomic.AtomicLong;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
/**
* A scheduler for running jobs in the background
*
*/
public class Scheduler {
final private Logger logger = LoggerFactory.getLogger(Scheduler.class);
final AtomicLong threadId = new AtomicLong(0);
final ScheduledThreadPoolExecutor executor;
final String baseThreadName;
/**
* create a scheduler
*
* @param numThreads
* @param baseThreadName
* @param isDaemon
*/
public Scheduler(int numThreads, final String baseThreadName, final boolean isDaemon) {
this.baseThreadName = baseThreadName;
executor = new ScheduledThreadPoolExecutor(numThreads, new ThreadFactory() {
public Thread newThread(Runnable r) {
Thread t = new Thread(r, baseThreadName + threadId.getAndIncrement());
t.setDaemon(isDaemon);
return t;
}
});
executor.setContinueExistingPeriodicTasksAfterShutdownPolicy(false);
executor.setExecuteExistingDelayedTasksAfterShutdownPolicy(false);
}
public ScheduledFuture<?> scheduleWithRate(Runnable command, long delayMs, long periodMs) {
return executor.scheduleAtFixedRate(command, delayMs, periodMs, TimeUnit.MILLISECONDS);
}
public void shutdownNow() {
executor.shutdownNow();
logger.info("force shutdown scheduler " + baseThreadName);
}
public void shutdown() {
executor.shutdown();
logger.info("shutdown scheduler " + baseThreadName);
}
}