Mercurial > dive4elements > river
view artifacts/src/main/java/org/dive4elements/river/artifacts/model/FastCrossSectionLineFactory.java @ 7471:fff862f4ef76
Experimental caching of datacage recommendations. The respective hook is called a lot and running the datacage over and over again when loading data can be expensive. So the generated recommendations are cached for some time.
Hopefully this improves the overall speed of loading data from the datacage.
author | Sascha L. Teichmann <teichmann@intevation.de> |
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date | Wed, 30 Oct 2013 15:26:21 +0100 |
parents | af13ceeba52a |
children | 0a5239a1e46e |
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/* Copyright (C) 2011, 2012, 2013 by Bundesanstalt für Gewässerkunde * Software engineering by Intevation GmbH * * This file is Free Software under the GNU AGPL (>=v3) * and comes with ABSOLUTELY NO WARRANTY! Check out the * documentation coming with Dive4Elements River for details. */ package org.dive4elements.river.artifacts.model; import org.dive4elements.river.artifacts.cache.CacheFactory; import org.dive4elements.river.model.CrossSection; import org.dive4elements.river.model.FastCrossSectionLine; import net.sf.ehcache.Cache; import net.sf.ehcache.Element; import java.util.List; import org.apache.log4j.Logger; public class FastCrossSectionLineFactory { private static Logger log = Logger.getLogger(FastCrossSectionLineFactory.class); public static final String CACHE_NAME = "fast-cross-section-lines"; private FastCrossSectionLineFactory() { } public static FastCrossSectionLine getCrossSectionLine( CrossSection cs, double km ) { Cache cache = CacheFactory.getCache(CACHE_NAME); boolean debug = log.isDebugEnabled(); if (cache == null) { if (debug) { log.debug("No cross section chunk cache configured."); } List<FastCrossSectionLine> lines = cs.getFastLines(km, km); return lines.isEmpty() ? null : lines.get(0); } String cacheKey = FastCrossSectionChunk.createHashKey(cs, km); Element element = cache.get(cacheKey); FastCrossSectionChunk fcsc; if (element != null) { if (debug) { log.debug("Found cross section chunk in cache id: " + cs.getId() + " km: " + km); } fcsc = (FastCrossSectionChunk)element.getValue(); } else { if (debug) { log.debug("Not found cross section chunk in cache id: " + cs.getId() + " km: " + km + " -> loading"); } fcsc = new FastCrossSectionChunk(cs, km); element = new Element(cacheKey, fcsc); cache.put(element); } return fcsc.getCrossSectionLine(km); } } // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :