EDIT

/**

* Copyright (C) 2007 EDIT

* European Distributed Institute of Taxonomy 

* http://www.e-taxonomy.eu

* 

* The contents of this file are subject to the Mozilla Public License Version 1.1

* See LICENSE.TXT at the top of this package for the full license terms.

*/

package eu.etaxonomy.cdm.remote.service;

import java.util.ArrayList;

import java.util.List;

import java.util.Map;

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.beans.factory.annotation.Autowired;

import org.springframework.jdbc.datasource.SimpleDriverDataSource;

import org.springframework.stereotype.Controller;

import org.springframework.web.servlet.ModelAndView;

import org.springframework.web.servlet.mvc.AbstractController;

import eu.etaxonomy.cdm.database.DataSourceReloader;

@Controller("managementController")

public class ManagementController extends AbstractController

{

	Log log = LogFactory.getLog(ManagementController.class);

	@Autowired

	private DataSourceReloader datasourceLoader;

	private static final int DEFAULT_PAGE_SIZE = 25;

	/* 

	 * return page not found http error (404) for unknown or incorrect UUIDs

	 * (non-Javadoc)

	 * @see org.springframework.web.servlet.mvc.AbstractController#handleRequestInternal(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)

	 */

	protected ModelAndView handleRequestInternal(HttpServletRequest req, HttpServletResponse resp) throws Exception

	{

			ModelAndView mv = new ModelAndView();

			String resource = getNonNullPara("resource",req);

			String op = getNonNullPara("operation",req);

			String q = getNonNullPara("q",req);

			log.info(String.format("Request received for manager: resource=%s op=%s ", resource, op));

			if(resource.equalsIgnoreCase("dataSources")){

				// get Object by UUID

				if(op.equalsIgnoreCase("reload")){

					mv.addObject("title", "CDM Community Server - Manager");

					Map<String,SimpleDriverDataSource> dataSources = datasourceLoader.reload();

					String bodyHtml = "<div><h4>Available Data Sources</h4><dl>";

					bodyHtml += "<p><i>The following data sources have been loaded:</i></p><table><th>BasePath</th><th>DataSource URI</th>";

					for(String key : dataSources.keySet()) {

						SimpleDriverDataSource ds = dataSources.get(key);

						bodyHtml += "<tr><td>"+key+"</td><td>"+ds.getUrl()+"</td></tr>";

					}

					bodyHtml += "</table><form name=\"input\" action=\"\" method=\"get\"><input type=\"submit\" value=\"Update\"></td></form></div>";

					mv.addObject("body", bodyHtml);

				}

			}

				else{

				// nothing matches

				mv.addObject("title", "CDM Community Server - Manager");

				mv.addObject("body", "<h4>Error</h4><p>Controller does not know this operation.</p>");

			}

			// set xml or json view

			mv.setViewName("htmlView");

			return mv;

	}

	/**

	 * return the value for the given parameter name as a string. 

	 * in case the parameters doesnt exist return an empty string "", not null.

	 * @param parameterName

	 * @param req

	 * @return

	 */

	private String getStringPara(String parameterName, HttpServletRequest req){

		// first try URL parameters set by org.springframework.web.servlet.handler.SimpleUrlHandlerMapping controller mapping

		Object map = req.getAttribute("ParameterizedUrlHandlerMapping.path-parameters");

		String result = null;

		if (map!=null){

			// first look into url parameters

			Map<String,String> urlParas = (Map<String, String>) map;

			result = urlParas.get(parameterName);

		}

		if (result == null){

			// alternatively try querystring parameters

			result = req.getParameter(parameterName);

		}

		return result;

	}

	private List<String> getListPara(String parameterName, HttpServletRequest req){

		ArrayList<String> list = new ArrayList<String>();

		String[] map = req.getParameterValues(parameterName);

		if(map != null){

			for(String param : map){

				list.add(param);

			}	

		}

		return list;

	}

	private String getNonNullPara(String parameterName, HttpServletRequest req){

		String val = getStringPara(parameterName, req);

		if (val==null){

			return "";

		}

		return val;

	}

	private Integer getIntPara(String parameterName, HttpServletRequest req){

		return getIntPara(parameterName, null, req);

	}

	private Integer getIntPara(String parameterName, Integer defaultValue, HttpServletRequest req){

		// first try URL parameters set by org.springframework.web.servlet.handler.SimpleUrlHandlerMapping controller mapping

		Integer result;

		String tmp = getStringPara(parameterName, req);

		try{

			result = Integer.valueOf(tmp);

		}catch (Exception e){

			result = defaultValue;

		}

		return result;

	}

	private Boolean getBoolPara(String parameterName, HttpServletRequest req){

		// first try URL parameters set by org.springframework.web.servlet.handler.SimpleUrlHandlerMapping controller mapping

		String tmp = getStringPara(parameterName, req);

		return Utils.isTrue(tmp);

	}

}