/** * 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); } }