001/**
002 * Copyright (c) 2008-2009 Apple Inc. All rights reserved.
003 * Copyright (C) 2012 FuseSource, Inc.
004 * http://fusesource.com
005 *
006 * Licensed under the Apache License, Version 2.0 (the "License");
007 * you may not use this file except in compliance with the License.
008 * You may obtain a copy of the License at
009 *
010 *    http://www.apache.org/licenses/LICENSE-2.0
011 *
012 * Unless required by applicable law or agreed to in writing, software
013 * distributed under the License is distributed on an "AS IS" BASIS,
014 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015 * See the License for the specific language governing permissions and
016 * limitations under the License.
017 */
018
019package org.fusesource.hawtdispatch;
020
021/**
022 * <p>
023 * Defines the supported global/concurrent queue priorities.
024 * </p>
025 *
026 * @author <a href="http://hiramchirino.com">Hiram Chirino</a>
027 */
028public enum DispatchPriority {
029    /**
030     * Items dispatched to the queue will run at high priority,
031     * i.e. the queue will be scheduled for execution before
032     * any default priority or low priority queue.
033     */
034    HIGH,
035    /**
036     * Items dispatched to the queue will run at the default
037     * priority, i.e. the queue will be scheduled for execution
038     * after all high priority queues have been scheduled, but
039     * before any low priority queues have been scheduled.
040     */
041    DEFAULT,
042    /**
043     * Items dispatched to the queue will run at low priority,
044     * i.e. the queue will be scheduled for execution after all
045     * default priority and high priority queues have been
046     * scheduled.
047     */
048    LOW;
049}