broadcastserviceimpl.java

来自「社区文章采用的是平板、树形自由选择的两种展示方式」· Java 代码 · 共 67 行

/* 
 * Created on 2007-11-22
 * Last modified on 2008-1-1
 * Powered by YeQiangWei.com
 */
package com.yeqiangwei.club.service.util.impl;

import java.util.LinkedList;
import java.util.List;

import com.yeqiangwei.cache.Cache;
import com.yeqiangwei.cache.singleton.CacheFactory;
import com.yeqiangwei.club.exception.ClubException;
import com.yeqiangwei.club.model.Broadcast;
import com.yeqiangwei.club.service.util.BroadcastService;
import com.yeqiangwei.club.util.MessageUtils;
import com.yeqiangwei.util.Validator;

public class BroadcastServiceImpl implements BroadcastService{
	
	private static int MAX = 3;
	
	private static final Cache<LinkedList<Broadcast>> CACHE = CacheFactory.<LinkedList<Broadcast>>creator("BROADCAST");

	public LinkedList<Broadcast> broadcastLinkedList;
	

	public LinkedList<Broadcast> getBroadcastLinkedList() {
		broadcastLinkedList = CACHE.get("BroadcastLinkedList");
		if(broadcastLinkedList==null){
			broadcastLinkedList = new LinkedList<Broadcast>();
			CACHE.put("linkedlist", broadcastLinkedList);
		}
		return broadcastLinkedList;
	}

	@Override
	public void create(Broadcast broadcast) throws ClubException {
		if(Validator.isEmpty(broadcast.getUser())){
			throw new ClubException(MessageUtils.getMessage("error_notlogin"));
		}
		else if(Validator.isEmpty(broadcast.getTitle())||Validator.isEmpty(broadcast.getContent())){
			throw new ClubException(MessageUtils.getMessage("error_empty"));
		}
		if(this.getBroadcastLinkedList().size()>=MAX){
			this.getBroadcastLinkedList().remove(0);
			this.getBroadcastLinkedList().add(broadcast);
		}
		this.getBroadcastLinkedList().add(broadcast);
	}

	@Override
	public List<Broadcast> findAll() {
		return this.getBroadcastLinkedList();
	}

	@Override
	public Broadcast findById(int id) {
		if(!Validator.isEmpty(this.getBroadcastLinkedList().get(id))){
			return this.getBroadcastLinkedList().get(id);	
		}
		return null;
	}


}