ssp_web/src/main/java/com/cloudcross/ssp/loader/AdvertiserLoader.java

package com.cloudcross.ssp.loader;

import java.util.ArrayList;
import java.util.HashMap;
import java.util.HashSet;
import java.util.Iterator;
import java.util.List;
import java.util.Map;
import java.util.Set;

import org.apache.log4j.Logger;

import com.cloudcross.ssp.model.Advertiser;

/**
 * 将广告主代理商信息存入内存
 *创建人：周俊
 *创建时间：2016.01.04
 *
 */
public class AdvertiserLoader {
	private static final Logger log = Logger.getLogger(AdvertiserLoader.class);
	
	public static List<Advertiser> ADVERTISER_LIST = new ArrayList<Advertiser>();//存放所有的广告主信息
	private static Map<Long,String> AGENTID_ADVERTISERID_MAP = new HashMap<Long,String>();//存放agentId,advertiserId键值对

	/**
	 * 获取所有的agentId放入set集合
	 * @return
	 */
	private static Set<Long> setAgentIdSet(){
		Set<Long> agentIdSet = new HashSet<Long>();
		if(ADVERTISER_LIST != null && ADVERTISER_LIST.size()>0){
			for(Advertiser adv:ADVERTISER_LIST){
				agentIdSet.add(adv.getAgentId());
			}
		}else{
			log.debug("ADVERTISER_LIST为空，广告主信息为空或没有加载到内存，请检查！");
		}
		return agentIdSet;
	}
	
	/**
	 * 处理加载内存中的广告主的数据,根据agentId把数据分成不同的组
	 * key:agentId
	 * value:List<Advertiser> list里面的数据有共同的agentId
	 * @return
	 */
	private static Map<Long,List<Advertiser>> setAgentIdKeyMap(){
		Map<Long,List<Advertiser>> agentKeyMap = new HashMap<Long, List<Advertiser>>();
		Set<Long> agentIdSet = setAgentIdSet();
		Iterator<Long> it = agentIdSet.iterator();
		while(it.hasNext()){
			Long agentId = it.next();
			List<Advertiser> advList = new ArrayList<Advertiser>();
			for(int i=0;i<ADVERTISER_LIST.size();i++){
				if(agentId.equals(ADVERTISER_LIST.get(i).getAgentId())){
					advList.add(ADVERTISER_LIST.remove(i));
					i--;
				}
			}
			agentKeyMap.put(agentId, advList);
		}
		return agentKeyMap;
	}
	
	/**
	 * 将通过agentId分类的数据广告主List集合中的广告主Id拼接成字符串，结果放到AGENTID_ADVERTISERID_MAP中
	 * key:agenyId
	 * value:{advertiserId1,advertiserId2,advertiserId3,...}
	 */
	public static void setAgentIdAdvertiserIdMap(){
		Map<Long,List<Advertiser>> map = setAgentIdKeyMap();
		List<Advertiser> list = null;
		for(Map.Entry<Long, List<Advertiser>> entry:map.entrySet()){
			Long l = entry.getKey();
			list = entry.getValue();
			Integer count = list.size();
			String str = "";
			for(int i=0;i<count-1;i++){
				str = str+list.get(i).getId()+",";
			}
			str = str + list.get(count-1).getId();
			AGENTID_ADVERTISERID_MAP.put(l, str);
		}
	}
	
	/**
	 * 提供外部访问内存数据的方法
	 * @param agentId
	 * @return
	 */
	public static String getAgentIdAdvertiserIdMap(Long agentId){
		if(AGENTID_ADVERTISERID_MAP != null && AGENTID_ADVERTISERID_MAP.size()>0){
			log.debug(AGENTID_ADVERTISERID_MAP.get(agentId));
			return AGENTID_ADVERTISERID_MAP.get(agentId);
		}else{
			log.debug("无法从内存获取数据");
			return "";
		}
	}
}