com.alibaba.rocketmq.common.consumer.ConsumeFromWhere Maven / Gradle / Ivy

Go to download
/**
 * 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.common.consumer;

/**
 * Consumer从哪里开始消费

 *
 * @author shijia.wxr
 */
public enum ConsumeFromWhere {
    /**
     * 一个新的订阅组第一次启动从队列的最后位置开始消费

     * 后续再启动接着上次消费的进度开始消费
     */
    CONSUME_FROM_LAST_OFFSET,

    @Deprecated
    CONSUME_FROM_LAST_OFFSET_AND_FROM_MIN_WHEN_BOOT_FIRST,
    @Deprecated
    CONSUME_FROM_MIN_OFFSET,
    @Deprecated
    CONSUME_FROM_MAX_OFFSET,
    /**
     * 一个新的订阅组第一次启动从队列的最前位置开始消费

     * 后续再启动接着上次消费的进度开始消费
     */
    CONSUME_FROM_FIRST_OFFSET,
    /**
     * 一个新的订阅组第一次启动从指定时间点开始消费

     * 后续再启动接着上次消费的进度开始消费

     * 时间点设置参见DefaultMQPushConsumer.consumeTimestamp参数
     */
    CONSUME_FROM_TIMESTAMP,
}