RuleAlgorithm.java

/*
 * Copyright 2012-2015 org.opencloudb.
 *  
 * 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.
 */
/**
 * (created at 2012-6-13)
 */
package org.opencloudb.config.model.rule;

/**
 * @author mycat
 */
public interface RuleAlgorithm {

	/**
	 * init
	 * 
	 * @param
	 */
	void init();

	/**
	 * 
	 * return sharding nodes's id
	 * columnValue is column's value
	 * @return never null
	 */
	Integer calculate(String columnValue);
}