/*
* This file is part of gwap, an open platform for games with a purpose
*
* Copyright (C) 2013
* Project play4science
* Lehr- und Forschungseinheit für Programmier- und Modellierungssprachen
* Ludwig-Maximilians-Universität München
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
package gwap.tools;
import gwap.model.resource.ArtResource;
import gwap.model.resource.ArtResourceCache;
import java.util.ArrayList;
import javax.persistence.EntityManager;
import javax.persistence.NoResultException;
import javax.persistence.Query;
import org.jboss.seam.annotations.In;
import org.jboss.seam.annotations.Logger;
import org.jboss.seam.annotations.Name;
import org.jboss.seam.international.LocaleSelector;
import org.jboss.seam.log.Log;
/**
* Service Bean for the ArtResourceLeastTagged entity
*
* @author Christoph Wieser
*/
@Name("artResourceDatabaseCacheBean")
public class ArtResourceDatabaseCacheBean implements ArtResourceCacheBean {
@In EntityManager entityManager;
@In CustomSourceBean customSourceBean;
@In private LocaleSelector localeSelector;
@Logger Log log;
private final int POOLSIZE = 100;
private final double RELOADTRIGGER = 0.1;
private final long MINTAGGINGS = 7;
@SuppressWarnings("unchecked")
private void updateCandidates(String name) {
// Check number of remaining candidate ArtResources having few tags.
Query pool = customSourceBean.query("artResourceCache.countByLanguageName");
pool.setParameter("name", name);
pool.setParameter("language", localeSelector.getLanguage());
Number poolSize = (Number) pool.getSingleResult();
// Reload Pool if needed
if(poolSize.intValue() < POOLSIZE * RELOADTRIGGER) {
ArrayList<Long> candidateArtResourceIdList = null;
if (name.equals("least")) {
log.info("Updating candidate pool of ArtResources with least taggings.");
// Check for resources with too few taggings to be played and display them first
Query leastTaggedMaxCountArtResources = customSourceBean.query("artResource.leastTaggedResourceIdMaxCount");
leastTaggedMaxCountArtResources.setParameter("language", localeSelector.getLanguage());
leastTaggedMaxCountArtResources.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
leastTaggedMaxCountArtResources.setParameter("maxCount", MINTAGGINGS-1);
candidateArtResourceIdList = (ArrayList<Long>) leastTaggedMaxCountArtResources.getResultList();
// Check for untagged resources
if (candidateArtResourceIdList.size()==0) {
Query notTaggedArtResources = customSourceBean.query("artResource.notTaggedResourceId");
notTaggedArtResources.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
candidateArtResourceIdList = (ArrayList<Long>) notTaggedArtResources.getResultList();
}
// Check for resources, if no untagged resources exist
if (candidateArtResourceIdList.size()==0) {
Query leastTaggedArtResources = customSourceBean.query("artResource.leastTaggedResourceId");
leastTaggedArtResources.setParameter("language", localeSelector.getLanguage());
leastTaggedArtResources.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
candidateArtResourceIdList = (ArrayList<Long>) leastTaggedArtResources.getResultList();
}
} else if (name.equals("atLeast")) {
log.info("Updating candidate pool of ArtResources with at least #0 taggings.", MINTAGGINGS);
// Check for resources
Query query = customSourceBean.query("artResource.atLeastTaggedResourceByLanguageId");
query.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
query.setParameter("minTaggings", MINTAGGINGS);
query.setParameter("language", localeSelector.getLanguage());
candidateArtResourceIdList = (ArrayList<Long>) query.getResultList();
} else if (name.equals("leastWithTeaser")) {
log.info("Updating candidate pool of ArtResources with least taggings with teaser.");
// Check for untagged resources
Query notTaggedArtResources = customSourceBean.query("artResource.notTaggedResourceIdWithTeaser");
notTaggedArtResources.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
candidateArtResourceIdList = (ArrayList<Long>) notTaggedArtResources.getResultList();
// Check for resources, if no untagged resources exist
if (candidateArtResourceIdList.size()==0) {
Query leastTaggedArtResources = customSourceBean.query("artResource.leastTaggedResourceIdWithTeaser");
leastTaggedArtResources.setParameter("language", localeSelector.getLanguage());
leastTaggedArtResources.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
candidateArtResourceIdList = (ArrayList<Long>) leastTaggedArtResources.getResultList();
}
} else if (name.equals("atLeastForCombino")) {
final long minTaggings = 220; // equal to circa 23 confirmed taggings
log.info("Updating candidate pool of ArtResources with at least #0 taggings for combination.", minTaggings);
// Check for resources
Query query = customSourceBean.query("artResource.atLeastTaggedResourceByLanguageId");
query.setMaxResults((int) (POOLSIZE * (1-RELOADTRIGGER)));
query.setParameter("minTaggings", minTaggings);
query.setParameter("language", localeSelector.getLanguage());
candidateArtResourceIdList = (ArrayList<Long>) query.getResultList();
}
// Persist new candidates
Query artResourceQuery = entityManager.createNamedQuery("artResource.byIdNotInCache");
int nrAddedResources = 0;
for (Long artResourceId : candidateArtResourceIdList) {
try {
artResourceQuery.setParameter("id", artResourceId);
artResourceQuery.setParameter("name", name);
artResourceQuery.setParameter("language", localeSelector.getLanguage());
ArtResource artResource = (ArtResource) artResourceQuery.getSingleResult();
ArtResourceCache artResourceCache = new ArtResourceCache();
artResourceCache.setArtResource(artResource);
artResourceCache.setName(name);
artResourceCache.setSource(artResource.getSource());
artResourceCache.setLanguage(localeSelector.getLanguage());
entityManager.persist(artResourceCache);
nrAddedResources++;
} catch (NoResultException e) { /* ArtResource is already in cache */ }
}
entityManager.flush();
log.info("Added #0 resources to candidate pool, #1 were skipped because they already were in candidate pool",
nrAddedResources, candidateArtResourceIdList.size()-nrAddedResources);
}
}
/* (non-Javadoc)
* @see gwap.tools.ArtResouceCacheBean#getArtResource(java.lang.String)
*/
@Override
public ArtResource getArtResource(String name) {
// still enough candidates?
updateCandidates(name);
// extract ArtResource
Query query = customSourceBean.query("artResourceCache.allByLanguageRandomName");
query.setParameter("name", name);
query.setParameter("language", localeSelector.getLanguage());
query.setMaxResults(1);
ArtResource artResource = null;
try {
ArtResourceCache artResourceCache = (ArtResourceCache) query.getSingleResult();
artResource = artResourceCache.getArtResource();
// delete ArtResource from pool
entityManager.remove(artResourceCache);
entityManager.flush();
} catch (Exception e) {
log.info("No #0 artresource available", name);
}
return artResource;
}
}