Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/FixingsColumnFactory.java @ 2619:6ed24efc80de
Loaded columns of fixings from database and store them into the cache.
flys-artifacts/trunk@4204 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Thu, 05 Apr 2012 15:29:52 +0000 |
parents | b0597a63fe70 |
children | cc0fa1798a3c |
rev | line source |
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More code for the fixings km chart service.
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1 package de.intevation.flys.artifacts.model; |
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2 |
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3 import de.intevation.flys.artifacts.model.FixingsOverview.Fixing; |
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4 |
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5 import de.intevation.flys.artifacts.cache.CacheFactory; |
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6 |
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7 import de.intevation.flys.backend.SessionHolder; |
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8 |
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9 import java.util.List; |
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10 |
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11 import net.sf.ehcache.Cache; |
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12 import net.sf.ehcache.Element; |
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13 |
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14 import org.hibernate.Session; |
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15 import org.hibernate.SQLQuery; |
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16 |
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17 import org.hibernate.type.StandardBasicTypes; |
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18 |
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19 public class FixingsColumnFactory |
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20 { |
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21 public static final String CACHE_NAME = "fixing-columns"; |
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22 |
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23 public static final String SQL_COLUMN_WS = |
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24 "SELECT wcv.position AS km, wcv.w AS w " + |
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25 "FROM wst_column_values wcv " + |
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26 "WHERE wst_column_id = :column_id " + |
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27 "ORDER by wcv.position"; |
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28 |
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29 public static final String SQL_COLUMN_QS = |
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30 "SELECT wqr.q AS q, r.a AS a, r.b AS b " + |
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31 "FROM wst_column_q_ranges wcqr " + |
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32 "JOIN wst_q_ranges wqr ON wcqr.wst_q_range_id = wqr.id " + |
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33 "JOIN ranges r ON wqr.range_id = r.id " + |
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34 "WHERE wcqr.wst_column_id = :column_id ORDER by r.a"; |
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35 |
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36 public static final FixingsColumnFactory INSTANCE = |
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37 new FixingsColumnFactory(); |
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38 |
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39 private FixingsColumnFactory() { |
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40 } |
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41 |
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42 public FixingsColumn getColumnData(Fixing.Column column) { |
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43 |
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44 FixingsColumn result; |
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45 |
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46 Cache cache = CacheFactory.getCache(CACHE_NAME); |
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47 |
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48 if (cache != null) { |
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49 Integer cacheKey = Integer.valueOf(column.getId()); |
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50 Element element = cache.get(cacheKey); |
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51 |
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52 if (element != null) { |
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53 return (FixingsColumn)element.getValue(); |
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54 } |
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55 |
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56 result = getUncached(column); |
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57 cache.put(new Element(cacheKey, result)); |
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58 } |
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59 else { |
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60 result = getUncached(column); |
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61 } |
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62 |
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63 return result; |
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64 } |
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65 |
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66 protected FixingsColumn getUncached(Fixing.Column column) { |
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67 Session session = SessionHolder.HOLDER.get(); |
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68 |
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69 SQLQuery sqlQuery = session.createSQLQuery(SQL_COLUMN_WS) |
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70 .addScalar("km", StandardBasicTypes.DOUBLE) |
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71 .addScalar("w", StandardBasicTypes.DOUBLE); |
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72 |
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73 sqlQuery.setInteger("column_id", column.getId()); |
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74 |
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75 List<Object []> results = sqlQuery.list(); |
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76 |
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77 double [] kms = new double[results.size()]; |
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78 double [] ws = new double[kms.length]; |
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79 |
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80 for (int i = 0; i < kms.length; ++i) { |
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81 Object [] row = results.get(i); |
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82 kms[i] = ((Double)row[0]).doubleValue(); |
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83 ws [i] = ((Double)row[1]).doubleValue(); |
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84 } |
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85 |
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86 sqlQuery = session.createSQLQuery(SQL_COLUMN_QS) |
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87 .addScalar("q", StandardBasicTypes.DOUBLE) |
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88 .addScalar("a", StandardBasicTypes.DOUBLE) |
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89 .addScalar("b", StandardBasicTypes.DOUBLE); |
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90 |
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91 sqlQuery.setInteger("column_id", column.getId()); |
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92 |
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93 results = sqlQuery.list(); |
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94 |
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95 QRangeTree qs = new QRangeTree( |
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96 results, QRangeTree.WITHOUT_COLUMN, 0, results.size()); |
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97 |
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98 return new FixingsColumn(kms, ws, qs); |
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99 } |
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100 } |
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101 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |