/**
* Copyright 2014 Duan Bingnan
*
* 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 org.pinus4j.cluster.router.impl;
import java.util.List;
import org.pinus4j.cluster.beans.DBInfo;
import org.pinus4j.cluster.beans.IShardingKey;
import org.pinus4j.exceptions.DBRouteException;
/**
* default simple hash algo router implements.
*
* @author duanbn
* @since 0.1.0
*/
public class SimpleHashClusterRouter extends AbstractClusterRouter {
@Override
public DBInfo doSelect(List<DBInfo> dbInfos, IShardingKey<?> value) throws DBRouteException {
long shardingValue = getShardingValue(value);
int dbNum = dbInfos.size();
int dbIndex = (int) shardingValue % dbNum;
return dbInfos.get(dbIndex);
}
}