    001    //$HeadURL: https://svn.wald.intevation.org/svn/deegree/base/branches/2.4_testing/src/org/deegree/framework/util/ProfilerInterceptor.java $
    002    // $Id: ProfilerInterceptor.java 18195 2009-06-18 15:55:39Z mschneider $
    003    /*----------------------------------------------------------------------------
    004     This file is part of deegree, http://deegree.org/
    005     Copyright (C) 2001-2009 by:
    006       Department of Geography, University of Bonn
    007     and
    008       lat/lon GmbH
    009
    010     This library is free software; you can redistribute it and/or modify it under
    011     the terms of the GNU Lesser General Public License as published by the Free
    012     Software Foundation; either version 2.1 of the License, or (at your option)
    013     any later version.
    014     This library is distributed in the hope that it will be useful, but WITHOUT
    015     ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
    016     FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for more
    017     details.
    018     You should have received a copy of the GNU Lesser General Public License
    019     along with this library; if not, write to the Free Software Foundation, Inc.,
    020     59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
    021
    022     Contact information:
    023
    024     lat/lon GmbH
    025     Aennchenstr. 19, 53177 Bonn
    026     Germany
    027     http://lat-lon.de/
    028
    029     Department of Geography, University of Bonn
    030     Prof. Dr. Klaus Greve
    031     Postfach 1147, 53001 Bonn
    032     Germany
    033     http://www.geographie.uni-bonn.de/deegree/
    034
    035     e-mail: info@deegree.org
    036    ----------------------------------------------------------------------------*/
    037
    038    package org.deegree.framework.util;
    039
    040    import java.lang.reflect.InvocationTargetException;
    041    import java.lang.reflect.Method;
    042    import java.text.DecimalFormat;
    043    import java.text.NumberFormat;
    044    import java.util.HashMap;
    045
    046    /**
    047     * Interceptor to profile the application.
    048     *
    049     * @author <a href="mailto:tfr@users.sourceforge.net">Torsten Friebe </A>
    050     *
    051     * @author last edited by: $Author: mschneider $
    052     *
    053     * @version 2.0, $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    054     *
    055     * @see <a href="http://www.dofactory.com/patterns/PatternChain.aspx">Chain of Responsibility Design Pattern </a>
    056     *
    057     * @since 2.0
    058     */
    059    public class ProfilerInterceptor extends Interceptor {
    060
    061        static {
    062            Runtime.getRuntime().addShutdownHook( new Thread( new Runnable() {
    063
    064                public void run() {
    065                    printStats();
    066                }
    067            } ) );
    068        }
    069
    070        /**
    071         * data to be used
    072         */
    073        protected static HashMap<String, ProfileEntry> data = new HashMap<String, ProfileEntry>();
    074
    075        /**
    076         *
    077         * @param nextInterceptor
    078         */
    079        public ProfilerInterceptor( Interceptor nextInterceptor ) {
    080            this.nextInterceptor = nextInterceptor;
    081        }
    082
    083        /**
    084         *
    085         *
    086         */
    087        protected static void printStats() {
    088            NumberFormat zweiDezimalen = new DecimalFormat( "### ###.##" );
    089
    090            for ( String m : data.keySet() ) {
    091                ProfileEntry entry = data.get( m );
    092                LOG.logInfo( entry.invocations + " calls " + entry.time + " ms " + " avg "
    093                             + zweiDezimalen.format( entry.getAverage() ) + m );
    094            }
    095        }
    096
    097        /**
    098         *
    099         * @param m
    100         * @return named ProfileEntry
    101         */
    102        protected static ProfileEntry getEntry( String m ) {
    103            if ( data.containsKey( m ) ) {
    104                return data.get( m );
    105            }
    106            ProfileEntry entry = new ProfileEntry();
    107            data.put( m, entry );
    108            return entry;
    109        }
    110
    111        /**
    112         * @param method
    113         * @param params
    114         * @return -
    115         */
    116        @Override
    117        protected Object handleInvocation( Method method, Object[] params )
    118                                throws IllegalAccessException, InvocationTargetException {
    119            long start = System.currentTimeMillis();
    120            Object result = nextInterceptor.handleInvocation( method, params );
    121            long duration = System.currentTimeMillis() - start;
    122            ProfileEntry entry = getEntry( getTarget().getClass().getName() + "." + method.getName() );
    123            entry.time += duration;
    124            entry.invocations++;
    125            return result;
    126        }
    127
    128        /**
    129         * <code>ProfileEntry</code> simple wrapper to be used ad a profile entry
    130         *
    131         * @author last edited by: $Author: mschneider $
    132         *
    133         * @version $Revision: 18195 $, $Date: 2009-06-18 17:55:39 +0200 (Do, 18. Jun 2009) $
    134         */
    135        static class ProfileEntry {
    136
    137            /**
    138             * of the profile entry
    139             */
    140            long time;
    141
    142            /**
    143             * how many invocations
    144             */
    145            long invocations;
    146
    147            /**
    148             * @return the average invocations during the last time
    149             */
    150            public double getAverage() {
    151                return (double) time / invocations;
    152            }
    153
    154        }
    155    }