com.pureinfo.tgirls.servlet.GetPicArrServlet.java Source code

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Here is the source code for com.pureinfo.tgirls.servlet.GetPicArrServlet.java

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/**
 * PureInfo TGirls
 * @(#)GetPicArrServlet.java   1.0 2009-3-10
 * 
 * Copyright(c) 2004-2005, PureInfo Information Technology Corp. Ltd. 
 * All rights reserved, see the license file.
 * 
 * www.pureinfo.com.cn
 */

package com.pureinfo.tgirls.servlet;

import java.io.IOException;
import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.Random;

import javax.servlet.ServletException;
import javax.servlet.http.HttpServlet;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;

import org.apache.commons.collections.iterators.LoopingIterator;
import org.apache.commons.lang.StringUtils;
import org.apache.log4j.Logger;
import org.json.JSONException;
import org.json.JSONObject;

import com.pureinfo.ark.content.ArkContentHelper;
import com.pureinfo.force.exception.PureException;
import com.pureinfo.tfr.cache.core.CacheManager;
import com.pureinfo.tfr.cache.core.IReadCache;
import com.pureinfo.tgirls.domain.IPhotoMgr;
import com.pureinfo.tgirls.json.model.JsonBase;
import com.pureinfo.tgirls.json.model.JsonBase.ErrorCode;
import com.pureinfo.tgirls.model.Photo;

public class GetPicArrServlet extends HttpServlet {
    /**
     * Comment for <code>serialVersionUID</code>
     */
    private static final long serialVersionUID = 1L;

    private Logger logger = Logger.getLogger(this.getClass().getName());

    IReadCache cache = CacheManager.getReadFromDBCache("view.pics");

    @Override
    protected void doGet(HttpServletRequest _req, HttpServletResponse _resp) throws ServletException, IOException {
        String type = _req.getParameter("pictype");
        String s = _req.getParameter("size");
        String sstartIndex = _req.getParameter("startIndex");

        if (StringUtils.isEmpty(s)) {
            s = "50";
        }
        if (StringUtils.isEmpty(sstartIndex)) {
            sstartIndex = "0";
        }

        int startIndex = Integer.parseInt(sstartIndex);
        int resultsize = Integer.parseInt(s);

        logger.debug("to get pics with type:" + type + " and size:" + resultsize);

        _resp.setContentType("text/json; charset=utf-8");
        JsonBase json = new JsonBase();

        //List<Photo> result = new ArrayList<Photo>();
        List<Photo> cacheList = null;

        if ((cacheList = (List<Photo>) cache.get("pics." + type)) == null) {
            try {

                startIndex = 0;

                IPhotoMgr mgr = (IPhotoMgr) ArkContentHelper.getContentMgrOf(Photo.class);
                if (StringUtils.isEmpty(type)) {
                    cacheList = mgr.getRandomPics(500);
                } else {
                    cacheList = mgr.getRandomPics(Integer.parseInt(type), 500);
                }
                if (cacheList != null) {
                    cache.put("pics." + type, cacheList);
                }

            } catch (PureException e) {
                logger.error("error when get pics.", e);
            }
        }

        if (cacheList == null || cacheList.isEmpty()) {
            json.setErrorCode(ErrorCode.ERROR.getCode());
            json.setErrorMsg("");
            _resp.getWriter().write(json.toString());
            return;
        }

        //Collections.shuffle(cacheList);
        //result.addAll(cacheList);

        //if (resultsize < result.size()) {
        //    result.subList(0, resultsize);
        //}

        try {
            Photo photo;
            List<JSONObject> jsonList = new ArrayList<JSONObject>();

            int temp = 0;
            int i = 0;
            if (startIndex == 0) {
                startIndex = new Random().nextInt(cacheList.size());
            }
            Iterator<Photo> itor = new LoopingIterator(cacheList);
            while (itor.hasNext() && i < resultsize) {
                photo = itor.next();
                if (temp < startIndex) {
                    logger.debug("currentIndex[" + temp + "] and startIndex[" + startIndex + "]");
                    temp++;
                    continue;
                }

                logger.debug("to add photo[" + photo + "]");
                jsonList.add(new JSONObject(photo));
                i++;
            }
            Collections.shuffle(jsonList);
            json.put("pics", jsonList);
            json.put("nextIndex", startIndex + resultsize);
        } catch (JSONException e) {
            throw new RuntimeException();
        }

        // logger.debug("result:" + json.toString());

        _resp.getWriter().write(json.toString());
        return;

    }

}