/*
* Copyright (c) 2011 Lockheed Martin Corporation
*
* 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.
*/
package org.eurekastreams.server.persistence.mappers.db.metrics;
import java.util.Calendar;
import java.util.Date;
import java.util.List;
import javax.persistence.Query;
import org.eurekastreams.commons.date.DateDayExtractor;
import org.eurekastreams.server.persistence.mappers.BaseArgDomainMapper;
/**
* DB Mapper to get the avgerage activity response time of a specific day.
*/
public class GetDailyMessageResponseTime extends BaseArgDomainMapper<Date, Long>
{
/**
* Thanks checkstyle.
*/
private final int millisInAMinute = 60000;
/**
* Get the number of stream viewers on a specific day.
*
* @param inDate
* the date to generate metrics for
* @return the number of stream viewers on the input day
*/
@SuppressWarnings("unchecked")
@Override
public Long execute(final Date inDate)
{
Date startOfDay, endOfDay;
Query q;
startOfDay = DateDayExtractor.getStartOfDay(inDate);
endOfDay = DateDayExtractor.getEndOfDay(inDate);
// all streams
q = getEntityManager().createQuery(
"SELECT MIN(c.timeSent), MIN(c.target.postedTime) FROM Comment c INNER JOIN c.target "
+ "WHERE c.timeSent >= :startDate AND c.timeSent <= :endDate AND "
+ "c.target.postedTime >= :startDate AND c.target.postedTime <= :endDate "
+ "GROUP BY c.target.id").setParameter("startDate", startOfDay).setParameter("endDate",
endOfDay);
List<Object[]> results = q.getResultList();
// short circuit if no results.
int numResults = results.size();
if (numResults == 0)
{
return 0L;
}
Calendar commentDate = Calendar.getInstance();
Calendar activityDate = Calendar.getInstance();
long commentTimeMillis, activityTimeMillis;
long timeDiffInMillis = 0;
for (Object[] row : results)
{
commentDate.setTime((Date) row[0]);
activityDate.setTime((Date) row[1]);
commentTimeMillis = commentDate.getTimeInMillis();
activityTimeMillis = activityDate.getTimeInMillis();
timeDiffInMillis += (commentTimeMillis - activityTimeMillis);
}
// return avg activity response time in min.
return (timeDiffInMillis / numResults) / millisInAMinute;
}
}