Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionLineFactory.java @ 4241:49cb65d5932d

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Improved the historical discharge calculation. The calculation now creates new HistoricalWQKms (new subclass of WQKms). Those WQKms are used to create new facets from (new) type 'HistoricalDischargeCurveFacet'. The chart generator is improved to support those facets.
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Wed, 24 Oct 2012 14:34:35 +0200
parents d626ae185305
children
rev   line source
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dc28ea60b53d Added cached/chunked access to cross section lines. TODO: Use the FastCrossSectionLines.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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1 package de.intevation.flys.artifacts.model;
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3 import de.intevation.flys.artifacts.cache.CacheFactory;
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5 import de.intevation.flys.model.CrossSection;
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6
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7 import de.intevation.flys.model.FastCrossSectionLine;
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9 import net.sf.ehcache.Cache;
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10 import net.sf.ehcache.Element;
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11
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12 import java.util.List;
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13
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14 import org.apache.log4j.Logger;
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16 public class FastCrossSectionLineFactory
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17 {
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18 private static Logger log =
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19 Logger.getLogger(FastCrossSectionLineFactory.class);
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20
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21 public static final String CACHE_NAME = "fast-cross-section-lines";
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23 private FastCrossSectionLineFactory() {
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24 }
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26 public static FastCrossSectionLine getCrossSectionLine(
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27 CrossSection cs,
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28 double km
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29 ) {
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30 Cache cache = CacheFactory.getCache(CACHE_NAME);
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31
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32 boolean debug = log.isDebugEnabled();
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34 if (cache == null) {
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35 if (debug) {
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36 log.debug("No cross section chunk cache configured.");
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37 }
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38 List<FastCrossSectionLine> lines = cs.getFastLines(km, km);
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39 return lines.isEmpty() ? null : lines.get(0);
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40 }
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42 String cacheKey = FastCrossSectionChunk.createHashKey(cs, km);
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44 Element element = cache.get(cacheKey);
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46 FastCrossSectionChunk fcsc;
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48 if (element != null) {
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49 if (debug) {
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50 log.debug("Found cross section chunk in cache id: " +
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51 cs.getId() + " km: " + km);
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52 }
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54 fcsc = (FastCrossSectionChunk)element.getValue();
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55 }
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56 else {
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57 if (debug) {
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58 log.debug("Not found cross section chunk in cache id: " +
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59 cs.getId() + " km: " + km + " -> loading");
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60 }
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61 fcsc = new FastCrossSectionChunk(cs, km);
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62 element = new Element(cacheKey, fcsc);
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63 cache.put(element);
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64 }
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65
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66 return fcsc.getCrossSectionLine(km);
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67 }
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68 }
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69 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org