/*

  * This software is licensed under the Apache License, Version 2.0

  * (the "License") agreement; 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.

  */

 package net.admin4j.ui.servlets;

 import java.io.IOException;

 import java.util.ArrayList;

 import java.util.Collections;

 import java.util.Comparator;

 import java.util.HashMap;

 import java.util.List;

 import java.util.Map;

 import java.util.Set;

 import java.util.TreeSet;

 import javax.servlet.ServletException;

 import javax.servlet.http.HttpServletRequest;

 import javax.servlet.http.HttpServletResponse;

 import net.admin4j.deps.commons.beanutils.BeanComparator;

 import net.admin4j.deps.commons.collections.comparators.ReverseComparator;

 import net.admin4j.deps.commons.lang3.StringUtils;

 import net.admin4j.timer.TaskTimerFactory;

 import net.admin4j.util.FreemarkerUtils;

 import net.admin4j.vo.DataMeasurementSummaryVO;

 import net.admin4j.vo.PerformanceSummaryVO;

 /**

  * Will display collected performance statistics.

  * @author D. Ashmore

  * @since 1.0

  */

 public class PerformanceDisplayServlet extends AdminDisplayServlet {

     private static final long serialVersionUID = 7019549673215008662L;

     public static final String PUBLIC_HANDLE="perf";

     /* (non-Javadoc)

      * @see javax.servlet.http.HttpServlet#service(javax.servlet.ServletRequest, javax.servlet.ServletResponse)

      */

     @Override

     public void service(HttpServletRequest request, HttpServletResponse response)

             throws ServletException, IOException {

         String actionStr = request.getParameter("action");

         if ( !StringUtils.isEmpty(actionStr)) {

             if ("delete".equalsIgnoreCase(actionStr)) {

                 TaskTimerFactory.delete(request.getParameter("perfLabel"));

             }

         }

         Map<String,Set<DataMeasurementSummaryVO>> summaryMap = TaskTimerFactory.getDataSummaryMap();

         TreeSet<String> labelSet = new TreeSet<String>(summaryMap.keySet());

         List<PerformanceSummaryVO> summaryList = new ArrayList<PerformanceSummaryVO>();

         PerformanceSummaryVO summary;

         Set<DataMeasurementSummaryVO> measureSet;

         for (String label: labelSet) {

             summary = new PerformanceSummaryVO();

             summaryList.add(summary);

             summary.setLabel(label);

             measureSet = summaryMap.get(label);

             for (DataMeasurementSummaryVO measure: measureSet) {

                 if (DataMeasurementSummaryVO.SummaryType.SUMMARY.equals(measure.getSummaryType())) {

                     summary.setSummaryMeasurement(measure);

                 }

                 else if (DataMeasurementSummaryVO.SummaryType.ROLLING_TIME.equals(measure.getSummaryType())) {

                     summary.setRollingTimeMeasurement(measure);

                 }

                 else if (DataMeasurementSummaryVO.SummaryType.ROLLING_NBR_OBS.equals(measure.getSummaryType())) {

                     summary.setRollingNbrObservationsMeasurement(measure);

                 }

             }

         }

         String sortField = request.getParameter("sortField"); 

         if ( StringUtils.isEmpty(sortField)) {

             sortField = "label";

         }

         if ("label".equals(sortField)) {

             Collections.sort(summaryList, new BeanComparator(sortField));

         }

         else {

             Collections.sort(summaryList, new ReverseComparator(new BeanComparator(sortField)));

         }

         Map<String,Object> variableMap = new HashMap<String,Object>();

         variableMap.put("performanceSummaryList", summaryList);

         FreemarkerUtils.addConfiguration(variableMap);

         this.displayFreeMarkerPage(request, response, "performanceDisplayServletDisplay.ftl", variableMap);

     }

     /* (non-Javadoc)

      * @see net.admin4j.ui.servlets.Admin4JServlet#getServletLabel()

      */

     @Override

     public String getServletLabel() {

         return "Performance Statistics";

     }

 }