com.sharksharding.core.shard.VerticalFacade Maven / Gradle / Ivy
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/*
* Copyright 2015-2101 gaoxianglong
*
* 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.sharksharding.core.shard;
import java.util.List;
/**
* 垂直分库,水平分片的一种关系型数据库分库分表模式
*
* @author gaoxianglong
*
* @author 2.0.1
*/
public class VerticalFacade extends RouteImpl {
private DataSourceHolder dataSourceHolder;
public VerticalFacade() {
dataSourceHolder = SharkDataSourceHolder.getDataSourceHolder();
}
@Override
public Object[] route(String sql, Object[] params, boolean indexType) {
String newSql = null;
final String TB_RULE_ARRSY = shardConfigInfo.getTbRuleArray();
List keyNames = ResolveShardkey.getShardKeys(shardConfigInfo);
if (keyNames.isEmpty())
return null;
/* 解析sql语句中的路由参数 */
final long SHARD_VALUE = ResolveRouteValue.getRoute(sql, keyNames);
Rule tbRule = getTbRule();
final int TB_INDEX = tbRule.getIndex(SHARD_VALUE, TB_RULE_ARRSY);
/* 解析数据库表名 */
final String TB_NAME = ResolveTbName.getTbName(sql);
/* 单库多表模式下设定真正的数据库表名 */
newSql = SetTbName.setName(shardConfigInfo, TB_INDEX, TB_NAME, sql);
final int DB_BEGIN_INDEX = ResolveIndex.getBeginIndex(shardConfigInfo.getWr_index(), indexType);
/* 切换数据库的数据源索引 */
SetDatasource.setIndex(DB_BEGIN_INDEX, dataSourceHolder);
return updateParam(newSql, params);
}
}