/*
* @(#)UserShardStrategy.java 2012-9-12 下午2:57:18
*
* Copyright (c) 2011-2012 Makersoft.org all rights reserved.
*
* Licensed under the Apache License, Version 2.0 (the "License");
*
*/
package org.makersoft.shards.strategy;
import java.util.List;
import java.util.Map;
import org.apache.ibatis.session.RowBounds;
import org.makersoft.shards.ShardId;
import org.makersoft.shards.annotation.ShardStrategy;
import org.makersoft.shards.domain.User;
import org.makersoft.shards.mapper.UserMapper;
import org.makersoft.shards.strategy.selection.SelectionStrategy;
/**
* Class description goes here.
*
* @version 2012-9-12 下午2:57:18
* @author Feng Kuok
* implements SelectionStrategy<User>, ResolutionStrategy<String>, ReduceStrategy
*/
@ShardStrategy(mapper = UserMapper.class)
public class UserShardStrategy implements SelectionStrategy<User>{
public ShardId selectShardIdForNewObject(User entity) {
if(User.SEX_MALE == entity.getGender()){
return new ShardId(1);
}else if(User.SEX_FEMALE == entity.getGender()){
return new ShardId(2);
}
// 或指向写库
return null;
}
public List<Object> reduce(String statement, Object parameter, RowBounds rowBounds,
List<Object> inputValues) {
return null;
}
public List<ShardId> selectShardIdsForResolution(String statement, Map<String, Object> parameter, String id) {
return null;
}
}