/**
* Copyright 2010 JBoss Inc
*
* 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.drools.benchmark.manners;
import java.io.BufferedReader;
import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.InputStreamReader;
import java.io.StringWriter;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Iterator;
import java.util.List;
import java.util.Random;
import java.util.StringTokenizer;
import org.drools.KnowledgeBase;
import org.drools.KnowledgeBaseFactory;
import org.drools.builder.KnowledgeBuilder;
import org.drools.builder.KnowledgeBuilderConfiguration;
import org.drools.builder.KnowledgeBuilderFactory;
import org.drools.builder.ResourceType;
import org.drools.definition.KnowledgePackage;
import org.drools.io.ResourceFactory;
import org.drools.runtime.StatefulKnowledgeSession;
public class MannersBenchmark {
/** Number of guests at the dinner (default: 16). */
private static int numGuests = 16;
/** Number of seats at the table (default: 16). */
private static int numSeats = 16;
/** Minimum number of hobbies each guest should have (default: 2). */
private static int minHobbies = 2;
/** Maximun number of hobbies each guest should have (default: 3). */
private static int maxHobbies = 3;
public static void main(final String[] args) throws Exception {
KnowledgeBuilderConfiguration kbuilderConfig = KnowledgeBuilderFactory.newKnowledgeBuilderConfiguration();
KnowledgeBuilder kbuilder = KnowledgeBuilderFactory.newKnowledgeBuilder( kbuilderConfig );
kbuilder.add( ResourceFactory.newClassPathResource( "manners.drl",
MannersBenchmark.class ),
ResourceType.DRL );
Collection<KnowledgePackage> pkgs = kbuilder.getKnowledgePackages();
// add the package to a rulebase
final KnowledgeBase kbase = KnowledgeBaseFactory.newKnowledgeBase();
kbase.addKnowledgePackages( pkgs );
long totalTime = 0;
for ( int i = 0; i < 5; i++ ) {
StatefulKnowledgeSession ksession = kbase.newStatefulKnowledgeSession();
String filename;
if ( args.length != 0 ) {
String arg = args[0];
filename = arg;
} else {
filename = "manners128.dat";
}
InputStream is = MannersBenchmark.class.getResourceAsStream( filename );
List list = getInputObjects( is );
for ( Iterator it = list.iterator(); it.hasNext(); ) {
Object object = it.next();
ksession.insert( object );
}
ksession.insert( new Count( 1 ) );
long start = System.currentTimeMillis();
ksession.fireAllRules();
long time = System.currentTimeMillis() - start;
System.err.println( time );
totalTime += time;
ksession.dispose();
}
System.out.println( "average : " + totalTime / 5 );
}
/**
* Convert the facts from the <code>InputStream</code> to a list of
* objects.
*/
protected static List<Object> getInputObjects(InputStream inputStream) throws IOException {
List<Object> list = new ArrayList<Object>();
BufferedReader br = new BufferedReader( new InputStreamReader( inputStream ) );
String line;
while ( (line = br.readLine()) != null ) {
if ( line.trim().length() == 0 || line.trim().startsWith( ";" ) ) {
continue;
}
StringTokenizer st = new StringTokenizer( line,
"() " );
String type = st.nextToken();
if ( "guest".equals( type ) ) {
if ( !"name".equals( st.nextToken() ) ) {
throw new IOException( "expected 'name' in: " + line );
}
String name = st.nextToken();
if ( !"sex".equals( st.nextToken() ) ) {
throw new IOException( "expected 'sex' in: " + line );
}
String sex = st.nextToken();
if ( !"hobby".equals( st.nextToken() ) ) {
throw new IOException( "expected 'hobby' in: " + line );
}
String hobby = st.nextToken();
Guest guest = new Guest( name,
Sex.resolve( sex ),
Hobby.resolve( hobby ) );
list.add( guest );
}
if ( "last_seat".equals( type ) ) {
if ( !"seat".equals( st.nextToken() ) ) {
throw new IOException( "expected 'seat' in: " + line );
}
list.add( new LastSeat( new Integer( st.nextToken() ).intValue() ) );
}
if ( "context".equals( type ) ) {
if ( !"state".equals( st.nextToken() ) ) {
throw new IOException( "expected 'state' in: " + line );
}
list.add( new Context( st.nextToken() ) );
}
}
inputStream.close();
return list;
}
public static InputStream generateData() {
final String LINE_SEPARATOR = System.getProperty( "line.separator" );
StringWriter writer = new StringWriter();
int maxMale = numGuests / 2;
int maxFemale = numGuests / 2;
int maleCount = 0;
int femaleCount = 0;
// init hobbies
List<String> hobbyList = new ArrayList<String>();
for ( int i = 1; i <= maxHobbies; i++ ) {
hobbyList.add( "h" + i );
}
Random rnd = new Random();
for ( int i = 1; i <= numGuests; i++ ) {
char sex = rnd.nextBoolean() ? 'm' : 'f';
if ( sex == 'm' && maleCount == maxMale ) {
sex = 'f';
}
if ( sex == 'f' && femaleCount == maxFemale ) {
sex = 'm';
}
if ( sex == 'm' ) {
maleCount++;
}
if ( sex == 'f' ) {
femaleCount++;
}
List<String> guestHobbies = new ArrayList<String>( hobbyList );
int numHobbies = minHobbies + rnd.nextInt( maxHobbies - minHobbies + 1 );
for ( int j = 0; j < numHobbies; j++ ) {
int hobbyIndex = rnd.nextInt( guestHobbies.size() );
String hobby = (String) guestHobbies.get( hobbyIndex );
writer.write( "(guest (name n" + i + ") (sex " + sex + ") (hobby " + hobby + "))" + LINE_SEPARATOR );
guestHobbies.remove( hobbyIndex );
}
}
writer.write( "(last_seat (seat " + numSeats + "))" + LINE_SEPARATOR );
writer.write( LINE_SEPARATOR );
writer.write( "(context (state start))" + LINE_SEPARATOR );
return new ByteArrayInputStream( writer.getBuffer().toString().getBytes() );
}
}