org.mzd.shap.spring.web.WorkBenchController.java Source code

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Here is the source code for org.mzd.shap.spring.web.WorkBenchController.java

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/**
 *
 * Copyright 2010 Matthew Z DeMaere.
 * 
 * This file is part of SHAP.
 *
 * SHAP is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * SHAP is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public License
 * along with SHAP.  If not, see <http://www.gnu.org/licenses/>.
 * 
 */
package org.mzd.shap.spring.web;

import java.util.Collection;
import java.util.List;
import java.util.TreeSet;

import javax.servlet.http.HttpSession;

import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestParam;
import org.springframework.web.bind.annotation.ResponseBody;
import org.springframework.web.util.WebUtils;

@Controller
@RequestMapping("/bench")
public class WorkBenchController extends AbstractControllerSupport {
    private static final String SESSION_ATTR_ITEMID = "workbenchItems";

    @SuppressWarnings("unchecked")
    protected Collection<Integer> getSessionItemIds(HttpSession session) {
        Object mutex = WebUtils.getSessionMutex(session);
        synchronized (mutex) {
            Object obj = session.getAttribute(SESSION_ATTR_ITEMID);
            if (obj == null) {
                obj = new TreeSet<Integer>();
                session.setAttribute(SESSION_ATTR_ITEMID, obj);
            }
            return (Collection<Integer>) obj;
        }
    }

    @RequestMapping("/clear_ajax")
    @ResponseBody
    public Integer clearIds(HttpSession session) {
        Object mutex = WebUtils.getSessionMutex(session);
        synchronized (mutex) {
            getSessionItemIds(session).clear();
        }
        return countActive(session);
    }

    @RequestMapping("/del_ajax")
    @ResponseBody
    public Integer deleteIds(@RequestParam List<Integer> itemIds, HttpSession session) {
        Object mutex = WebUtils.getSessionMutex(session);
        synchronized (mutex) {
            getSessionItemIds(session).removeAll(itemIds);
        }
        return countActive(session);
    }

    @RequestMapping("/add_ajax")
    @ResponseBody
    public Integer addIds(@RequestParam List<Integer> itemIds, HttpSession session) {
        Object mutex = WebUtils.getSessionMutex(session);
        synchronized (mutex) {
            getSessionItemIds(session).addAll(itemIds);
        }
        return countActive(session);
    }

    //   public Integer addIds(@RequestParam List<Integer> itemIds, HttpSession session) {
    //      Object mutex = WebUtils.getSessionMutex(session);
    //      synchronized (mutex) {
    //         if (itemIds.size() > 0) {
    //            getSessionItemIds(session).addAll(itemIds);
    //         }
    //      }
    //      return countActive(session);
    //   }

    @RequestMapping("/count_ajax")
    @ResponseBody
    public Integer countActive(HttpSession session) {
        return getSessionItemIds(session).size();
    }
}