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/**
 * Copyright (C) 2010-2013 Alibaba Group Holding Limited
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package com.alibaba.rocketmq.store;

/**
 * 访问消息返回的状态码
 * 
 * @author shijia.wxr
 * @since 2013-7-21
 */
public enum GetMessageStatus {
    // 找到消息
    FOUND,
    // offset正确，但是过滤后没有匹配的消息
    NO_MATCHED_MESSAGE,
    // offset正确，但是物理队列消息正在被删除
    MESSAGE_WAS_REMOVING,
    // offset正确，但是从逻辑队列没有找到，可能正在被删除
    OFFSET_FOUND_NULL,
    // offset错误，严重溢出
    OFFSET_OVERFLOW_BADLY,
    // offset错误，溢出1个
    OFFSET_OVERFLOW_ONE,
    // offset错误，太小了
    OFFSET_TOO_SMALL,
    // 没有对应的逻辑队列
    NO_MATCHED_LOGIC_QUEUE,
    // 队列中一条消息都没有
    NO_MESSAGE_IN_QUEUE,
}