/*
* Seldon -- open source prediction engine
* =======================================
* Copyright 2011-2015 Seldon Technologies Ltd and Rummble Ltd (http://www.seldon.io/)
*
**********************************************************************************************
*
* 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 io.seldon.stream.itemsim;
import java.util.List;
import java.util.Random;
import java.util.Timer;
import java.util.TimerTask;
import org.junit.Test;
public class JaccardSimilarityTest {
@Test
public void concurrencyTest()
{
final StreamingJaccardSimilarity j = new StreamingJaccardSimilarity(6, 100, 0);
Timer reloadTimer = new Timer(true);
reloadTimer.scheduleAtFixedRate(new TimerTask() {
public void run()
{
List<JaccardSimilarity> res = j.getSimilarity(System.currentTimeMillis()/1000);
System.out.println("Results size "+res.size());
for(int i=0;i<3;i++)
System.out.println(res.get(i));
}
}, 2000, 2000);
long t1 = System.currentTimeMillis()/1000;
long endTime = t1+20;
Random r = new Random();
do
{
long t = System.currentTimeMillis()/1000;
int itemId = r.nextInt(200);
int userId = r.nextInt(9999);
j.add(itemId, userId, t);
}while((System.currentTimeMillis()/1000)<= endTime);
reloadTimer.cancel();
}
}