Mercurial > dive4elements > river
comparison flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FastCrossSectionLineFactory.java @ 2119:dc28ea60b53d
Added cached/chunked access to cross section lines. TODO: Use the FastCrossSectionLines.
flys-artifacts/trunk@3689 c6561f87-3c4e-4783-a992-168aeb5c3f6f
| author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
|---|---|
| date | Mon, 16 Jan 2012 15:51:46 +0000 |
| parents | |
| children | d626ae185305 |
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| 2118:4d57d456e261 | 2119:dc28ea60b53d |
|---|---|
| 1 package de.intevation.flys.artifacts.model; | |
| 2 | |
| 3 import de.intevation.flys.artifacts.cache.CacheFactory; | |
| 4 | |
| 5 import de.intevation.flys.model.CrossSection; | |
| 6 import de.intevation.flys.model.CrossSectionLine; | |
| 7 | |
| 8 import net.sf.ehcache.Cache; | |
| 9 import net.sf.ehcache.Element; | |
| 10 | |
| 11 import java.util.List; | |
| 12 | |
| 13 | |
| 14 public class FastCrossSectionLineFactory | |
| 15 { | |
| 16 public static final String CACHE_NAME = "fast-cross-section-lines"; | |
| 17 | |
| 18 private FastCrossSectionLineFactory() { | |
| 19 } | |
| 20 | |
| 21 public static FastCrossSectionLine getCrossSectionLine( | |
| 22 CrossSection cs, | |
| 23 double km | |
| 24 ) { | |
| 25 Cache cache = CacheFactory.getCache(CACHE_NAME); | |
| 26 | |
| 27 if (cache == null) { | |
| 28 List<CrossSectionLine> lines = cs.getLines(km, km); | |
| 29 return lines.isEmpty() | |
| 30 ? null | |
| 31 : new FastCrossSectionLine(lines.get(0)); | |
| 32 } | |
| 33 | |
| 34 String cacheKey = FastCrossSectionChunk.createHashKey(cs, km); | |
| 35 | |
| 36 Element element = cache.get(cacheKey); | |
| 37 | |
| 38 FastCrossSectionChunk fcsc; | |
| 39 | |
| 40 if (element != null) { | |
| 41 fcsc = (FastCrossSectionChunk)element.getValue(); | |
| 42 } | |
| 43 else { | |
| 44 fcsc = new FastCrossSectionChunk(cs, km); | |
| 45 element = new Element(cacheKey, fcsc); | |
| 46 cache.put(element); | |
| 47 } | |
| 48 | |
| 49 return fcsc.getCrossSectionLine(km); | |
| 50 } | |
| 51 } | |
| 52 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |