com.sharksharding.core.shard.SharkDatasourceGroup 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 org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.jdbc.datasource.lookup.AbstractRoutingDataSource;
/**
* shark动态数据源实现
*
* 该数据源继承自Spring提供的AbstractRoutingDataSource,可以根据配置文件中的数据源索引对多数据源进行动态切换,
* 能够非常方便的实现数据源路由工作
*
* @author gaoxianglong
*
* @version 1.3.5
*/
public class SharkDatasourceGroup extends AbstractRoutingDataSource implements DataSource {
private DataSourceHolder dataSourceHolder;
private static Logger logger = LoggerFactory.getLogger(SharkDatasourceGroup.class);
private SharkDatasourceGroup() {
dataSourceHolder = SharkDataSourceHolder.getDataSourceHolder();
}
@Override
protected Object determineCurrentLookupKey() {
int index = -1;
if (null != dataSourceHolder) {
/* 获取存放在ThreadLocal中的数据源索引 */
index = dataSourceHolder.getIndex();
logger.debug("datasource index-->" + index);
}
return index;
}
}