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BranchBarrier.java
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/*
* MIT License
*
* Copyright (c) 2021 yedf
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in all
* copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
package barrier;
import com.alibaba.fastjson.JSONObject;
import common.constant.ParamFieldConstant;
import common.model.DtmConsumer;
import lombok.Data;
import lombok.NoArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import java.sql.Connection;
import java.sql.PreparedStatement;
import java.sql.SQLException;
import java.util.Map;
import java.util.Objects;
/**
* @author lixiaoshuang
*/
@Data
@NoArgsConstructor
@Slf4j
public class BranchBarrier {
/**
* 事务类型
*/
private String transType;
/**
* 全局事务id
*/
private String gid;
/**
* 分支id
*/
private String branchId;
/**
* 操作
*/
private String op;
/**
* 屏障id
*/
private int barrierId;
public BranchBarrier(Map<String, String[]> parameterMap) throws Exception {
if (null == parameterMap) {
throw new Exception("BranchBarrier parameterMap null!");
}
BarrierParam barrierParam = JSONObject.parseObject(JSONObject.toJSONString(parameterMap), BarrierParam.class);
if (barrierParam.getTrans_type().length > 0) {
this.transType = barrierParam.getTrans_type()[0];
}
if (barrierParam.getGid().length > 0) {
this.gid = barrierParam.getGid()[0];
}
if (barrierParam.getBranch_id().length > 0) {
this.branchId = barrierParam.getBranch_id()[0];
}
if (barrierParam.getOp().length > 0) {
this.op = barrierParam.getOp()[0];
}
}
/**
* connection 由使用方自行管理，创建、回收。
*
* @param connection
* @param consumer
* @return
* @throws SQLException
*/
public void call(Connection connection, DtmConsumer<BranchBarrier> consumer) throws Exception {
this.barrierId++;
connection.setAutoCommit(false);
try {
boolean result = insertBarrier(connection);
if (result) {
consumer.accept(this);
connection.commit();
}
} catch (Exception exception) {
log.warn("barrier call error", exception);
connection.rollback();
throw exception;
} finally {
connection.setAutoCommit(true);
}
}
private boolean insertBarrier(Connection connection) throws SQLException {
if (Objects.isNull(connection)) {
return false;
}
PreparedStatement preparedStatement = null;
try {
String sql = "insert ignore into barrier(trans_type, gid, branch_id, op, barrier_id, reason) values(?,?,?,?,?,?)";
preparedStatement = connection.prepareStatement(sql);
preparedStatement.setString(1, transType);
preparedStatement.setString(2, gid);
preparedStatement.setString(3, branchId);
preparedStatement.setString(4, op);
preparedStatement.setString(5, String.format("%02d", barrierId));
preparedStatement.setString(6, op);
if (preparedStatement.executeUpdate() == 0) {
return false;
}
if (op.equals(ParamFieldConstant.CANCEL)) {
int opIndex = 4;
preparedStatement.setString(opIndex, ParamFieldConstant.TRY);
if (preparedStatement.executeUpdate() > 0) {
return false;
}
}
} finally {
if (Objects.nonNull(preparedStatement)) {
preparedStatement.close();
}
}
return true;
}
}