/**
* 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.broker.transaction;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.alibaba.rocketmq.broker.BrokerController;
import com.alibaba.rocketmq.broker.client.ClientChannelInfo;
import com.alibaba.rocketmq.common.constant.LoggerName;
import com.alibaba.rocketmq.common.protocol.header.CheckTransactionStateRequestHeader;
import com.alibaba.rocketmq.store.SelectMapedBufferResult;
import com.alibaba.rocketmq.store.transaction.TransactionCheckExecuter;
/**
* 存储层回调此接口，用来主动回查Producer的事务状态
*
* @author shijia.wxr<vintage.wang@gmail.com>
* @since 2013-7-26
*/
public class DefaultTransactionCheckExecuter implements TransactionCheckExecuter {
private static final Logger log = LoggerFactory.getLogger(LoggerName.BrokerLoggerName);
private final BrokerController brokerController;
public DefaultTransactionCheckExecuter(final BrokerController brokerController) {
this.brokerController = brokerController;
}
@Override
public void gotoCheck(int producerGroupHashCode, long tranStateTableOffset, long commitLogOffset,
int msgSize) {
// 第一步、查询Producer
final ClientChannelInfo clientChannelInfo =
this.brokerController.getProducerManager().pickProducerChannelRandomly(producerGroupHashCode);
if (null == clientChannelInfo) {
log.warn("check a producer transaction state, but not find any channel of this group[{}]",
producerGroupHashCode);
return;
}
// 第二步、查询消息
SelectMapedBufferResult selectMapedBufferResult =
this.brokerController.getMessageStore().selectOneMessageByOffset(commitLogOffset, msgSize);
if (null == selectMapedBufferResult) {
log.warn(
"check a producer transaction state, but not find message by commitLogOffset: {}, msgSize: ",
commitLogOffset, msgSize);
return;
}
// 第三步、向Producer发起请求
final CheckTransactionStateRequestHeader requestHeader = new CheckTransactionStateRequestHeader();
requestHeader.setCommitLogOffset(commitLogOffset);
requestHeader.setTranStateTableOffset(tranStateTableOffset);
this.brokerController.getBroker2Client().checkProducerTransactionState(
clientChannelInfo.getChannel(), requestHeader, selectMapedBufferResult);
}
}