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

jdkSrc/jdk8/java/util/concurrent/CompletionService.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;
+
+/**
+ * A service that decouples the production of new asynchronous tasks
+ * from the consumption of the results of completed tasks.  Producers
+ * {@code submit} tasks for execution. Consumers {@code take}
+ * completed tasks and process their results in the order they
+ * complete.  A {@code CompletionService} can for example be used to
+ * manage asynchronous I/O, in which tasks that perform reads are
+ * submitted in one part of a program or system, and then acted upon
+ * in a different part of the program when the reads complete,
+ * possibly in a different order than they were requested.
+ *
+ * <p>Typically, a {@code CompletionService} relies on a separate
+ * {@link Executor} to actually execute the tasks, in which case the
+ * {@code CompletionService} only manages an internal completion
+ * queue. The {@link ExecutorCompletionService} class provides an
+ * implementation of this approach.
+ *
+ * <p>Memory consistency effects: Actions in a thread prior to
+ * submitting a task to a {@code CompletionService}
+ * <a href="package-summary.html#MemoryVisibility"><i>happen-before</i></a>
+ * actions taken by that task, which in turn <i>happen-before</i>
+ * actions following a successful return from the corresponding {@code take()}.
+ */
+public interface CompletionService<V> {
+    /**
+     * Submits a value-returning task for execution and returns a Future
+     * representing the pending results of the task.  Upon completion,
+     * this task may be taken or polled.
+     *
+     * @param task the task to submit
+     * @return a Future representing pending completion of the task
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if the task is null
+     */
+    Future<V> submit(Callable<V> task);
+
+    /**
+     * Submits a Runnable task for execution and returns a Future
+     * representing that task.  Upon completion, this task may be
+     * taken or polled.
+     *
+     * @param task the task to submit
+     * @param result the result to return upon successful completion
+     * @return a Future representing pending completion of the task,
+     *         and whose {@code get()} method will return the given
+     *         result value upon completion
+     * @throws RejectedExecutionException if the task cannot be
+     *         scheduled for execution
+     * @throws NullPointerException if the task is null
+     */
+    Future<V> submit(Runnable task, V result);
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task, waiting if none are yet present.
+     *
+     * @return the Future representing the next completed task
+     * @throws InterruptedException if interrupted while waiting
+     */
+    Future<V> take() throws InterruptedException;
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task, or {@code null} if none are present.
+     *
+     * @return the Future representing the next completed task, or
+     *         {@code null} if none are present
+     */
+    Future<V> poll();
+
+    /**
+     * Retrieves and removes the Future representing the next
+     * completed task, waiting if necessary up to the specified wait
+     * time if none are yet present.
+     *
+     * @param timeout how long to wait before giving up, in units of
+     *        {@code unit}
+     * @param unit a {@code TimeUnit} determining how to interpret the
+     *        {@code timeout} parameter
+     * @return the Future representing the next completed task or
+     *         {@code null} if the specified waiting time elapses
+     *         before one is present
+     * @throws InterruptedException if interrupted while waiting
+     */
+    Future<V> poll(long timeout, TimeUnit unit) throws InterruptedException;
+}