com.alibaba.rocketmq.example.transaction.TransactionExecuterImpl Maven / Gradle / Ivy

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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.example.transaction;

import java.util.concurrent.atomic.AtomicInteger;

import com.alibaba.rocketmq.client.producer.LocalTransactionExecuter;
import com.alibaba.rocketmq.client.producer.LocalTransactionState;
import com.alibaba.rocketmq.common.message.Message;


/**
 * 执行本地事务
 */
public class TransactionExecuterImpl implements LocalTransactionExecuter {
    private AtomicInteger transactionIndex = new AtomicInteger(1);


    @Override
    public LocalTransactionState executeLocalTransactionBranch(final Message msg, final Object arg) {
        int value = transactionIndex.getAndIncrement();

        if (value == 0) {
            throw new RuntimeException("Could not find db");
        }
        else if ((value % 5) == 0) {
            return LocalTransactionState.ROLLBACK_MESSAGE;
        }
        else if ((value % 4) == 0) {
            return LocalTransactionState.COMMIT_MESSAGE;
        }

        return LocalTransactionState.UNKNOW;
    }
}