MySQLTempStatTableDropper.java

/**
* OLAT - Online Learning and Training<br>
* http://www.olat.org
* <p>
* Licensed under the Apache License, Version 2.0 (the "License"); <br>
* you may not use this file except in compliance with the License.<br>
* You may obtain a copy of the License at
* <p>
* http://www.apache.org/licenses/LICENSE-2.0
* <p>
* Unless required by applicable law or agreed to in writing,<br>
* software distributed under the License is distributed on an "AS IS" BASIS, <br>
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. <br>
* See the License for the specific language governing permissions and <br>
* limitations under the License.
* <p>
* Copyright (c) since 2004 at Multimedia- & E-Learning Services (MELS),<br>
* University of Zurich, Switzerland.
* <hr>
* <a href="http://www.openolat.org">
* OpenOLAT - Online Learning and Training</a><br>
* This file has been modified by the OpenOLAT community. Changes are licensed
* under the Apache 2.0 license as the original file.
*/
package org.olat.course.statistic;

import java.util.Date;

import org.olat.core.logging.OLog;
import org.olat.core.logging.Tracing;
import org.springframework.jdbc.core.JdbcTemplate;

/**
 * MySQL specific class which drops the temporary table with the
 * result of 'o_loggingtable where actionverb=launch and actionobject=node'.
 * <P>
 * Initial Date:  16.02.2010 <br>
 * @author Stefan
 */
public class MySQLTempStatTableDropper implements IStatisticUpdater {

	/** the logging object used in this class **/
	private static final OLog log = Tracing.createLoggerFor(MySQLTempStatTableDropper.class);

	/** the jdbcTemplate is used to allow access to other than the default database and 
	 * allow raw sql code
	 */
	private JdbcTemplate jdbcTemplate_;

	/** set via spring **/
	public void setJdbcTemplate(JdbcTemplate jdbcTemplate) {
		jdbcTemplate_ = jdbcTemplate;
	}
	
	@Override
	public void updateStatistic(boolean fullRecalculation, Date from, Date until, StatisticUpdateManager statisticUpdateManager) {
		// note: fullRecalculation has no affect to the dropper
		
		// create temp table
		final long startTime = System.currentTimeMillis();
		try{
			jdbcTemplate_.execute("drop table o_stat_temptable;");

		} catch(RuntimeException e) {
			log.error("", e);
		} catch(Error er) {
			log.error("", er);
		} finally {
			final long diff = System.currentTimeMillis() - startTime;
			log.info("updateStatistic: END. duration=" + diff);
		}
	}

}