com.anysoft.loadbalance.impl.Hash Maven / Gradle / Ivy
package com.anysoft.loadbalance.impl;
import java.util.List;
import java.util.Random;
import com.anysoft.loadbalance.AbstractLoadBalance;
import com.anysoft.loadbalance.Load;
import com.anysoft.util.Properties;
/**
* 基于主键Hash的LoadBalance
*
* @author duanyy
*
* @param
*
* @version 1.5.3 [20141020 duanyy]
* - 改造loadbalance模型
*/
public class Hash extends AbstractLoadBalance {
public Hash(Properties props){
super(props);
}
public load onSelect(String key,Properties props, List loads) {
load found = null;
int size = loads.size();
if (size > 0){
int hashcode = 0;
if (key == null || key.length() <= 0){
//当没有传入Key的时候，同Rand模式
hashcode = r.nextInt(size) % size;
}else{
hashcode = key.hashCode();
}
found = loads.get((hashcode & Integer.MAX_VALUE) % size);
}
return found;
}
public static Random r = new Random();
}