feat(jdk8): move files to new folder to avoid resources compiled.

jdkSrc/jdk8/java/util/concurrent/ScheduledExecutorService.java

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+/*
+ * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER.
+ *
+ * This code is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU General Public License version 2 only, as
+ * published by the Free Software Foundation.  Oracle designates this
+ * particular file as subject to the "Classpath" exception as provided
+ * by Oracle in the LICENSE file that accompanied this code.
+ *
+ * This code is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
+ * version 2 for more details (a copy is included in the LICENSE file that
+ * accompanied this code).
+ *
+ * You should have received a copy of the GNU General Public License version
+ * 2 along with this work; if not, write to the Free Software Foundation,
+ * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA.
+ *
+ * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA
+ * or visit www.oracle.com if you need additional information or have any
+ * questions.
+ */
+
+/*
+ * This file is available under and governed by the GNU General Public
+ * License version 2 only, as published by the Free Software Foundation.
+ * However, the following notice accompanied the original version of this
+ * file:
+ *
+ * Written by Doug Lea with assistance from members of JCP JSR-166
+ * Expert Group and released to the public domain, as explained at
+ * http://creativecommons.org/publicdomain/zero/1.0/
+ */
+
+package java.util.concurrent;
+
+/**
+ * An {@link ExecutorService} that can schedule commands to run after a given
+ * delay, or to execute periodically.
+ *
+ * <p>The {@code schedule} methods create tasks with various delays
+ * and return a task object that can be used to cancel or check
+ * execution. The {@code scheduleAtFixedRate} and
+ * {@code scheduleWithFixedDelay} methods create and execute tasks
+ * that run periodically until cancelled.
+ *
+ * <p>Commands submitted using the {@link Executor#execute(Runnable)}
+ * and {@link ExecutorService} {@code submit} methods are scheduled
+ * with a requested delay of zero. Zero and negative delays (but not
+ * periods) are also allowed in {@code schedule} methods, and are
+ * treated as requests for immediate execution.
+ *
+ * <p>All {@code schedule} methods accept <em>relative</em> delays and
+ * periods as arguments, not absolute times or dates. It is a simple
+ * matter to transform an absolute time represented as a {@link
+ * java.util.Date} to the required form. For example, to schedule at
+ * a certain future {@code date}, you can use: {@code schedule(task,
+ * date.getTime() - System.currentTimeMillis(),
+ * TimeUnit.MILLISECONDS)}. Beware however that expiration of a
+ * relative delay need not coincide with the current {@code Date} at
+ * which the task is enabled due to network time synchronization
+ * protocols, clock drift, or other factors.
+ *
+ * <p>The {@link Executors} class provides convenient factory methods for
+ * the ScheduledExecutorService implementations provided in this package.
+ *
+ * <h3>Usage Example</h3>
+ *
+ * Here is a class with a method that sets up a ScheduledExecutorService
+ * to beep every ten seconds for an hour:
+ *
+ *  <pre> {@code
+ * import static java.util.concurrent.TimeUnit.*;
+ * class BeeperControl {
+ *   private final ScheduledExecutorService scheduler =
+ *     Executors.newScheduledThreadPool(1);
+ *
+ *   public void beepForAnHour() {
+ *     final Runnable beeper = new Runnable() {
+ *       public void run() { System.out.println("beep"); }
+ *     };
+ *     final ScheduledFuture<?> beeperHandle =
+ *       scheduler.scheduleAtFixedRate(beeper, 10, 10, SECONDS);
+ *     scheduler.schedule(new Runnable() {
+ *       public void run() { beeperHandle.cancel(true); }
+ *     }, 60 * 60, SECONDS);
+ *   }
+ * }}</pre>
+ *
+ * @since 1.5
+ * @author Doug Lea
+ */
+public interface ScheduledExecutorService extends ExecutorService {
+
+    /**
+     * Creates and executes a one-shot action that becomes enabled
+     * after the given delay.
+     *
+     * @param command the task to execute
+     * @param delay the time from now to delay execution
+     * @param unit the time unit of the delay parameter
+     * @return a ScheduledFuture representing pending completion of
+     *         the task and whose {@code get()} method will return
+     *         {@code null} upon completion
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if command is null
+     */
+    public ScheduledFuture<?> schedule(Runnable command,
+                                       long delay, TimeUnit unit);
+
+    /**
+     * Creates and executes a ScheduledFuture that becomes enabled after the
+     * given delay.
+     *
+     * @param callable the function to execute
+     * @param delay the time from now to delay execution
+     * @param unit the time unit of the delay parameter
+     * @param <V> the type of the callable's result
+     * @return a ScheduledFuture that can be used to extract result or cancel
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if callable is null
+     */
+    public <V> ScheduledFuture<V> schedule(Callable<V> callable,
+                                           long delay, TimeUnit unit);
+
+    /**
+     * Creates and executes a periodic action that becomes enabled first
+     * after the given initial delay, and subsequently with the given
+     * period; that is executions will commence after
+     * {@code initialDelay} then {@code initialDelay+period}, then
+     * {@code initialDelay + 2 * period}, and so on.
+     * If any execution of the task
+     * encounters an exception, subsequent executions are suppressed.
+     * Otherwise, the task will only terminate via cancellation or
+     * termination of the executor.  If any execution of this task
+     * takes longer than its period, then subsequent executions
+     * may start late, but will not concurrently execute.
+     *
+     * @param command the task to execute
+     * @param initialDelay the time to delay first execution
+     * @param period the period between successive executions
+     * @param unit the time unit of the initialDelay and period parameters
+     * @return a ScheduledFuture representing pending completion of
+     *         the task, and whose {@code get()} method will throw an
+     *         exception upon cancellation
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if command is null
+     * @throws IllegalArgumentException if period less than or equal to zero
+     */
+    public ScheduledFuture<?> scheduleAtFixedRate(Runnable command,
+                                                  long initialDelay,
+                                                  long period,
+                                                  TimeUnit unit);
+
+    /**
+     * Creates and executes a periodic action that becomes enabled first
+     * after the given initial delay, and subsequently with the
+     * given delay between the termination of one execution and the
+     * commencement of the next.  If any execution of the task
+     * encounters an exception, subsequent executions are suppressed.
+     * Otherwise, the task will only terminate via cancellation or
+     * termination of the executor.
+     *
+     * @param command the task to execute
+     * @param initialDelay the time to delay first execution
+     * @param delay the delay between the termination of one
+     * execution and the commencement of the next
+     * @param unit the time unit of the initialDelay and delay parameters
+     * @return a ScheduledFuture representing pending completion of
+     *         the task, and whose {@code get()} method will throw an
+     *         exception upon cancellation
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if command is null
+     * @throws IllegalArgumentException if delay less than or equal to zero
+     */
+    public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command,
+                                                     long initialDelay,
+                                                     long delay,
+                                                     TimeUnit unit);
+
+}