package com.genersoft.iot.vmp.conf;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.scheduling.annotation.Scheduled;
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import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
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import org.springframework.stereotype.Component;
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import javax.annotation.PostConstruct;
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import java.time.Instant;
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import java.util.Map;
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import java.util.Set;
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import java.util.concurrent.ConcurrentHashMap;
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import java.util.concurrent.ScheduledFuture;
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import java.util.concurrent.TimeUnit;
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/**
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* 动态定时任务
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* @author lin
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*/
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@Component
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public class DynamicTask {
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private final Logger logger = LoggerFactory.getLogger(DynamicTask.class);
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private ThreadPoolTaskScheduler threadPoolTaskScheduler;
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private final Map<String, ScheduledFuture<?>> futureMap = new ConcurrentHashMap<>();
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private final Map<String, Runnable> runnableMap = new ConcurrentHashMap<>();
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@PostConstruct
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public void DynamicTask() {
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threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
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threadPoolTaskScheduler.setPoolSize(300);
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threadPoolTaskScheduler.setWaitForTasksToCompleteOnShutdown(true);
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threadPoolTaskScheduler.setAwaitTerminationSeconds(10);
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threadPoolTaskScheduler.initialize();
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}
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/**
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* 循环执行的任务
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* @param key 任务ID
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* @param task 任务
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* @param cycleForCatalog 间隔 毫秒
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* @return
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*/
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public void startCron(String key, Runnable task, int cycleForCatalog) {
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ScheduledFuture<?> future = futureMap.get(key);
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if (future != null) {
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if (future.isCancelled()) {
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logger.debug("任务【{}】已存在但是关闭状态！！！", key);
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} else {
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logger.debug("任务【{}】已存在且已启动！！！", key);
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return;
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}
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}
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// scheduleWithFixedDelay 必须等待上一个任务结束才开始计时period， cycleForCatalog表示执行的间隔
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future = threadPoolTaskScheduler.scheduleAtFixedRate(task, cycleForCatalog);
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if (future != null){
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futureMap.put(key, future);
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runnableMap.put(key, task);
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logger.debug("任务【{}】启动成功！！！", key);
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}else {
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logger.debug("任务【{}】启动失败！！！", key);
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}
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}
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/**
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* 延时任务
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* @param key 任务ID
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* @param task 任务
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* @param delay 延时 /毫秒
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* @return
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*/
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public void startDelay(String key, Runnable task, int delay) {
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stop(key);
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// 获取执行的时刻
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Instant startInstant = Instant.now().plusMillis(TimeUnit.MILLISECONDS.toMillis(delay));
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ScheduledFuture future = futureMap.get(key);
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if (future != null) {
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if (future.isCancelled()) {
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logger.debug("任务【{}】已存在但是关闭状态！！！", key);
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} else {
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logger.debug("任务【{}】已存在且已启动！！！", key);
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return;
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}
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}
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// scheduleWithFixedDelay 必须等待上一个任务结束才开始计时period， cycleForCatalog表示执行的间隔
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future = threadPoolTaskScheduler.schedule(task, startInstant);
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if (future != null){
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futureMap.put(key, future);
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runnableMap.put(key, task);
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logger.debug("任务【{}】启动成功！！！", key);
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}else {
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logger.debug("任务【{}】启动失败！！！", key);
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}
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}
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public boolean stop(String key) {
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boolean result = false;
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if (futureMap.get(key) != null && !futureMap.get(key).isCancelled() && !futureMap.get(key).isDone()) {
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result = futureMap.get(key).cancel(false);
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futureMap.remove(key);
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runnableMap.remove(key);
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}
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return result;
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}
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public boolean contains(String key) {
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return futureMap.get(key) != null;
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}
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public Set<String> getAllKeys() {
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return futureMap.keySet();
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}
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public Runnable get(String key) {
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return runnableMap.get(key);
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}
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/**
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* 每五分钟检查失效的任务，并移除
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*/
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@Scheduled(cron="0 0/5 * * * ?")
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public void execute(){
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if (futureMap.size() > 0) {
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for (String key : futureMap.keySet()) {
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if (futureMap.get(key).isDone() || futureMap.get(key).isCancelled()) {
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futureMap.remove(key);
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runnableMap.remove(key);
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}
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}
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}
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}
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public boolean isAlive(String key) {
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return futureMap.get(key) != null && !futureMap.get(key).isDone() && !futureMap.get(key).isCancelled();
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}
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}
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