alpha.portal.webapp.controller.ReloadController.java Source code

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Here is the source code for alpha.portal.webapp.controller.ReloadController.java
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/**************************************************************************
 * alpha-Portal: A web portal, for managing knowledge-driven 
 * ad-hoc processes, in form of case files.
 * ==============================================
 * Copyright (C) 2011-2012 by 
 *   - Christoph P. Neumann (http://www.chr15t0ph.de)
 *   - and the SWAT 2011 team
 **************************************************************************
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with
 * the License. You may obtain a copy of the License at
 *     http://www.apache.org/licenses/LICENSE-2.0
 * Unless required by applicable law or agreed to in writing, software 
 * distributed under the License is distributed on an "AS IS" BASIS, 
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and 
 * limitations under the License.
 **************************************************************************
 * $Id$
 *************************************************************************/
package alpha.portal.webapp.controller;

import java.io.PrintWriter;
import java.util.ArrayList;
import java.util.List;

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

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.stereotype.Controller;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RequestMethod;
import org.springframework.web.servlet.ModelAndView;

import alpha.portal.webapp.listener.StartupListener;

/**
 * This class is used to reload the drop-downs initialized in the
 * StartupListener.
 * 
 * <p>
 * <a href="ReloadController.java.html"><i>View Source</i></a>
 * </p>
 * 
 * @author <a href="mailto:matt@raibledesigns.com">Matt Raible</a>
 */
@Controller
@RequestMapping("/admin/reload*")
public class ReloadController {

    /** The log. */
    private transient final Log log = LogFactory.getLog(ReloadController.class);

    /**
     * Handle request.
     * 
     * @param request
     *            the request
     * @param response
     *            the response
     * @return the model and view
     * @throws Exception
     *             the exception
     */
    @RequestMapping(method = RequestMethod.GET)
    @SuppressWarnings("unchecked")
    public ModelAndView handleRequest(final HttpServletRequest request, final HttpServletResponse response)
            throws Exception {
        if (this.log.isDebugEnabled()) {
            this.log.debug("Entering 'execute' method");
        }

        StartupListener.setupContext(request.getSession().getServletContext());

        final String referer = request.getHeader("Referer");

        if (referer != null) {
            this.log.info("reload complete, reloading user back to: " + referer);
            List<String> messages = (List) request.getSession().getAttribute(BaseFormController.MESSAGES_KEY);

            if (messages == null) {
                messages = new ArrayList();
            }

            messages.add("Reloading options completed successfully.");
            request.getSession().setAttribute(BaseFormController.MESSAGES_KEY, messages);

            response.sendRedirect(response.encodeRedirectURL(referer));
            return null;
        } else {
            response.setContentType("text/html");

            final PrintWriter out = response.getWriter();

            out.println("<html>");
            out.println("<head>");
            out.println("<title>Context Reloaded</title>");
            out.println("</head>");
            out.println("<body bgcolor=\"white\">");
            out.println("<script type=\"text/javascript\">");
            out.println("alert('Context Reload Succeeded! Click OK to continue.');");
            out.println("history.back();");
            out.println("</script>");
            out.println("</body>");
            out.println("</html>");
        }

        return null;
    }

}