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https://gitee.com/chinabugotech/hutool.git
synced 2025-07-21 15:09:48 +08:00
1. 在使用阻塞等待获取锁的方式中，必须在try代码块之外，并且在加锁方法与try代码块之间没有任何可能抛出异常的方法调用，避免加锁成功后，在finally中无法解锁。
说明一：如果在lock方法与try代码块之间的方法调用抛出异常，那么无法解锁，造成其它线程无法成功获取锁。 说明二：如果lock方法在try代码块之内，可能由于其它方法抛出异常，导致在finally代码块中，unlock对未加锁的对象解锁，它会调用AQS的tryRelease方法（取决于具体实现类），抛出IllegalMonitorStateException异常。 说明三：在Lock对象的lock方法实现中可能抛出unchecked异常，产生的后果与说明二相同。 java.concurrent.LockShouldWithTryFinallyRule.rule.desc 2. 补上遗漏的Override注解
This commit is contained in:
zhuqianchao
@@ -20,255 +20,255 @@ import java.util.concurrent.locks.ReentrantReadWriteLock;
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* @author Looly
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*/
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public class TaskTable implements Serializable {
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private static final long serialVersionUID = 1L;
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private static final long serialVersionUID = 1L;
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private final ReadWriteLock lock = new ReentrantReadWriteLock();
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private final ReadWriteLock lock = new ReentrantReadWriteLock();
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private final Scheduler scheduler;
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private final TimeZone timezone;
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private final Scheduler scheduler;
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private final TimeZone timezone;
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private final List<String> ids = new ArrayList<>();
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private final List<CronPattern> patterns = new ArrayList<>();
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private final List<Task> tasks = new ArrayList<>();
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private int size;
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private final List<String> ids = new ArrayList<>();
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private final List<CronPattern> patterns = new ArrayList<>();
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private final List<Task> tasks = new ArrayList<>();
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private int size;
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/**
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* 构造
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*
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* @param scheduler {@link Scheduler}
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*/
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public TaskTable(Scheduler scheduler) {
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this.scheduler = scheduler;
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this.timezone = scheduler.getTimeZone();
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}
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/**
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* 构造
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*
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* @param scheduler {@link Scheduler}
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*/
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public TaskTable(Scheduler scheduler) {
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this.scheduler = scheduler;
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this.timezone = scheduler.getTimeZone();
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}
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/**
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* 新增Task
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*
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* @param id ID
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* @param pattern {@link CronPattern}
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* @param task {@link Task}
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* @return this
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*/
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public TaskTable add(String id, CronPattern pattern, Task task) {
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final Lock writeLock = lock.writeLock();
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try {
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writeLock.lock();
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if (ids.contains(id)) {
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throw new CronException("Id [{}] has been existed!", id);
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}
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ids.add(id);
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patterns.add(pattern);
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tasks.add(task);
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size++;
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} finally {
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writeLock.unlock();
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}
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return this;
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}
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/**
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* 新增Task
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*
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* @param id ID
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* @param pattern {@link CronPattern}
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* @param task {@link Task}
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* @return this
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*/
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public TaskTable add(String id, CronPattern pattern, Task task) {
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final Lock writeLock = lock.writeLock();
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writeLock.lock();
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try {
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if (ids.contains(id)) {
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throw new CronException("Id [{}] has been existed!", id);
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}
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ids.add(id);
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patterns.add(pattern);
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tasks.add(task);
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size++;
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} finally {
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writeLock.unlock();
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}
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return this;
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}
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/**
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* 获取所有ID，返回不可变列表，即列表不可修改
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*
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* @return ID列表
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* @since 4.6.7
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*/
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public List<String> getIds() {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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return Collections.unmodifiableList(this.ids);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获取所有ID，返回不可变列表，即列表不可修改
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*
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* @return ID列表
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* @since 4.6.7
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*/
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public List<String> getIds() {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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return Collections.unmodifiableList(this.ids);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获取所有定时任务表达式，返回不可变列表，即列表不可修改
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*
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* @return 定时任务表达式列表
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* @since 4.6.7
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*/
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public List<CronPattern> getPatterns() {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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return Collections.unmodifiableList(this.patterns);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获取所有定时任务表达式，返回不可变列表，即列表不可修改
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*
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* @return 定时任务表达式列表
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* @since 4.6.7
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*/
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public List<CronPattern> getPatterns() {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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return Collections.unmodifiableList(this.patterns);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获取所有定时任务，返回不可变列表，即列表不可修改
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*
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* @return 定时任务列表
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* @since 4.6.7
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*/
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public List<Task> getTasks() {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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return Collections.unmodifiableList(this.tasks);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获取所有定时任务，返回不可变列表，即列表不可修改
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*
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* @return 定时任务列表
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* @since 4.6.7
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*/
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public List<Task> getTasks() {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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return Collections.unmodifiableList(this.tasks);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 移除Task
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*
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* @param id Task的ID
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*/
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public void remove(String id) {
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final Lock writeLock = lock.writeLock();
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try {
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writeLock.lock();
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final int index = ids.indexOf(id);
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if (index > -1) {
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tasks.remove(index);
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patterns.remove(index);
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ids.remove(index);
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size--;
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}
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} finally {
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writeLock.unlock();
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}
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}
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/**
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* 移除Task
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*
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* @param id Task的ID
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*/
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public void remove(String id) {
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final Lock writeLock = lock.writeLock();
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writeLock.lock();
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try {
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final int index = ids.indexOf(id);
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if (index > -1) {
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tasks.remove(index);
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patterns.remove(index);
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ids.remove(index);
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size--;
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}
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} finally {
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writeLock.unlock();
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}
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}
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/**
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* 更新某个Task的定时规则
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*
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* @param id Task的ID
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* @param pattern 新的表达式
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* @return 是否更新成功，如果id对应的规则不存在则不更新
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* @since 4.0.10
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*/
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public boolean updatePattern(String id, CronPattern pattern) {
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final Lock writeLock = lock.writeLock();
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try {
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writeLock.lock();
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final int index = ids.indexOf(id);
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if (index > -1) {
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patterns.set(index, pattern);
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return true;
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}
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} finally {
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writeLock.unlock();
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}
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return false;
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}
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/**
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* 更新某个Task的定时规则
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*
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* @param id Task的ID
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* @param pattern 新的表达式
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* @return 是否更新成功，如果id对应的规则不存在则不更新
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* @since 4.0.10
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*/
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public boolean updatePattern(String id, CronPattern pattern) {
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final Lock writeLock = lock.writeLock();
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writeLock.lock();
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try {
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final int index = ids.indexOf(id);
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if (index > -1) {
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patterns.set(index, pattern);
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return true;
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}
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} finally {
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writeLock.unlock();
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}
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return false;
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}
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/**
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* 获得指定位置的{@link Task}
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*
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* @param index 位置
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* @return {@link Task}
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* @since 3.1.1
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*/
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public Task getTask(int index) {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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return tasks.get(index);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获得指定位置的{@link Task}
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*
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* @param index 位置
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* @return {@link Task}
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* @since 3.1.1
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*/
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public Task getTask(int index) {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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return tasks.get(index);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获得指定id的{@link Task}
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*
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* @param id ID
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* @return {@link Task}
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* @since 3.1.1
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*/
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public Task getTask(String id) {
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final int index = ids.indexOf(id);
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if (index > -1) {
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return getTask(index);
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}
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return null;
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}
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/**
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* 获得指定id的{@link Task}
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*
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* @param id ID
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* @return {@link Task}
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* @since 3.1.1
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*/
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public Task getTask(String id) {
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final int index = ids.indexOf(id);
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if (index > -1) {
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return getTask(index);
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}
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return null;
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}
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/**
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* 获得指定位置的{@link CronPattern}
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*
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* @param index 位置
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* @return {@link CronPattern}
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* @since 3.1.1
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*/
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public CronPattern getPattern(int index) {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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return patterns.get(index);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 获得指定位置的{@link CronPattern}
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*
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* @param index 位置
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* @return {@link CronPattern}
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* @since 3.1.1
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*/
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public CronPattern getPattern(int index) {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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return patterns.get(index);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 任务表大小，加入的任务数
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*
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* @return 任务表大小，加入的任务数
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* @since 4.0.2
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*/
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public int size() {
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return this.size;
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}
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/**
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* 任务表大小，加入的任务数
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*
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* @return 任务表大小，加入的任务数
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* @since 4.0.2
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*/
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public int size() {
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return this.size;
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}
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/**
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* 任务表是否为空
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*
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* @return true为空
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* @since 4.0.2
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*/
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public boolean isEmpty() {
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return this.size < 1;
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}
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/**
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* 任务表是否为空
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*
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* @return true为空
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* @since 4.0.2
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*/
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public boolean isEmpty() {
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return this.size < 1;
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}
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/**
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* 获得指定id的{@link CronPattern}
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*
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* @param id ID
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* @return {@link CronPattern}
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* @since 3.1.1
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*/
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public CronPattern getPattern(String id) {
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final int index = ids.indexOf(id);
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if (index > -1) {
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return getPattern(index);
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}
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return null;
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}
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/**
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* 获得指定id的{@link CronPattern}
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*
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* @param id ID
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* @return {@link CronPattern}
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* @since 3.1.1
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*/
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public CronPattern getPattern(String id) {
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final int index = ids.indexOf(id);
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if (index > -1) {
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return getPattern(index);
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}
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return null;
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}
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/**
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* 如果时间匹配则执行相应的Task，带读锁
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*
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* @param millis 时间毫秒
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*/
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public void executeTaskIfMatch(long millis) {
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final Lock readLock = lock.readLock();
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try {
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readLock.lock();
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executeTaskIfMatchInternal(millis);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 如果时间匹配则执行相应的Task，带读锁
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*
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* @param millis 时间毫秒
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*/
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public void executeTaskIfMatch(long millis) {
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final Lock readLock = lock.readLock();
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readLock.lock();
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try {
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executeTaskIfMatchInternal(millis);
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} finally {
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readLock.unlock();
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}
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}
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/**
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* 如果时间匹配则执行相应的Task，无锁
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*
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* @param millis 时间毫秒
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* @since 3.1.1
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*/
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protected void executeTaskIfMatchInternal(long millis) {
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for (int i = 0; i < size; i++) {
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if (patterns.get(i).match(timezone, millis, this.scheduler.matchSecond)) {
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this.scheduler.taskExecutorManager.spawnExecutor(tasks.get(i));
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}
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}
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}
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/**
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* 如果时间匹配则执行相应的Task，无锁
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*
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* @param millis 时间毫秒
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* @since 3.1.1
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*/
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protected void executeTaskIfMatchInternal(long millis) {
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for (int i = 0; i < size; i++) {
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if (patterns.get(i).match(timezone, millis, this.scheduler.matchSecond)) {
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this.scheduler.taskExecutorManager.spawnExecutor(tasks.get(i));
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}
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}
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}
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}
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Reference in New Issue
Block a user