/* This program is free software: you can redistribute it and/or
modify it under the terms of the GNU Lesser 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
package org.opentripplanner.analyst.request;
import javax.annotation.PostConstruct;
import org.opentripplanner.analyst.core.TemplateTile;
import org.opentripplanner.analyst.core.Tile;
import org.opentripplanner.routing.services.GraphService;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import com.google.common.cache.CacheBuilder;
import com.google.common.cache.CacheLoader;
import com.google.common.cache.LoadingCache;
import com.google.common.cache.Weigher;
public class TileCache extends CacheLoader<TileRequest, Tile>
implements Weigher<TileRequest, Tile> {
private static final Logger LOG = LoggerFactory.getLogger(TileCache.class);
private GraphService graphService;
public TileCache(GraphService graphService) {
this.graphService = graphService;
this.tileCache = CacheBuilder.newBuilder()
.concurrencyLevel(concurrency)
.maximumSize(size)
.build(this);
}
private LoadingCache<TileRequest, Tile> tileCache;
public int size = 200;
public int concurrency = 16;
@Override
/** completes the abstract CacheLoader superclass */
public Tile load(TileRequest req) throws Exception {
LOG.debug("tile cache miss; cache size is {}", this.tileCache.size());
return new TemplateTile(req, graphService);
//return new TemplateTile(req, hashSampler);
//return new DynamicTile(req, hashSampler);
//return new DynamicTile(req, sampleFactory);
}
/** delegate to the tile LoadingCache */
public Tile get(TileRequest req) throws Exception {
return tileCache.get(req);
}
@Override
public int weigh(TileRequest req, Tile tile) {
return tile.getSamples().length;
}
}