    001    /*
    002     * Copyright (C) 2011 The Guava Authors
    003     *
    004     * Licensed under the Apache License, Version 2.0 (the "License");
    005     * you may not use this file except in compliance with the License.
    006     * You may obtain a copy of the License at
    007     *
    008     * http://www.apache.org/licenses/LICENSE-2.0
    009     *
    010     * Unless required by applicable law or agreed to in writing, software
    011     * distributed under the License is distributed on an "AS IS" BASIS,
    012     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    013     * See the License for the specific language governing permissions and
    014     * limitations under the License.
    015     */
    016
    017    package com.google.common.util.concurrent;
    018
    019    import com.google.common.annotations.Beta;
    020
    021    import java.util.concurrent.ScheduledExecutorService;
    022
    023    /**
    024     * A {@link ScheduledExecutorService} that returns {@link ListenableFuture}
    025     * instances from its {@code ExecutorService} methods.  Futures returned by the
    026     * {@code schedule*} methods, by contrast, need not implement {@code
    027     * ListenableFuture}.  (To create an instance from an existing {@link
    028     * ScheduledExecutorService}, call {@link
    029     * MoreExecutors#listeningDecorator(ScheduledExecutorService)}.
    030     *
    031     * <p>TODO(cpovirk): make at least the one-time schedule() methods return a
    032     * ListenableFuture, too? But then we'll need ListenableScheduledFuture...
    033     *
    034     * @author Chris Povirk
    035     * @since 10.0
    036     */
    037    @Beta
    038    public interface ListeningScheduledExecutorService
    039        extends ScheduledExecutorService, ListeningExecutorService {
    040    }