Mercurial > dive4elements > river
annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/model/WKmsFactory.java @ 4498:04f144c42da5
Improve debugging in StaticFLYSArtifact
author | Björn Ricks <bjoern.ricks@intevation.de> |
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date | Wed, 14 Nov 2012 11:16:56 +0100 |
parents | 58bdf95df5e4 |
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1 package de.intevation.flys.artifacts.model; |
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2 |
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3 import java.util.List; |
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4 |
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5 import net.sf.ehcache.Cache; |
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6 import net.sf.ehcache.Element; |
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7 |
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8 import org.apache.log4j.Logger; |
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9 |
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10 import org.hibernate.Session; |
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11 |
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12 import org.hibernate.SQLQuery; |
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13 import org.hibernate.type.StandardBasicTypes; |
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14 |
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15 import de.intevation.flys.artifacts.cache.CacheFactory; |
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16 |
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17 import de.intevation.flys.backend.SessionHolder; |
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18 |
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19 |
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20 /** |
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21 * Factory to access ready-made WKms for other (than computed) 'kinds' of |
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22 * WST-data. |
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23 */ |
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24 public class WKmsFactory |
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25 { |
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26 /** Private logger to use here. */ |
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27 private static Logger log = Logger.getLogger(WKmsFactory.class); |
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28 |
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29 /** Query to get km and ws for wst_id and column_pos. */ |
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30 public static final String SQL_SELECT_WS = |
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31 "SELECT km, w FROM wst_w_values " + |
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32 "WHERE wst_id = :wst_id AND column_pos = :column_pos"; |
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33 |
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34 /** Query to get name for wst_id and column_pos. */ |
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35 public static final String SQL_SELECT_NAME = |
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36 "SELECT name " + |
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37 "FROM wst_columns "+ |
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38 "WHERE wst_id = :wst_id AND position = :column_pos"; |
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39 |
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40 /** Query to get name (description) for wst_id. */ |
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41 public static final String SQL_SELECT_WST_NAME = |
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42 "SELECT description from wsts "+ |
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43 "WHERE id = :wst_id"; |
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44 |
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45 |
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46 private WKmsFactory() { |
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47 } |
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48 |
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49 |
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50 /** |
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51 * Get WKms for given column and wst_id, caring about the cache. |
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52 */ |
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53 public static WKms getWKms(int column, int wst_id) { |
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54 log.debug("WKmsFactory.getWKms"); |
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55 Cache cache = CacheFactory.getCache(StaticWKmsCacheKey.CACHE_NAME); |
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56 |
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57 StaticWKmsCacheKey cacheKey; |
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58 |
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59 if (cache != null) { |
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60 cacheKey = new StaticWKmsCacheKey(wst_id, column); |
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61 Element element = cache.get(cacheKey); |
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62 if (element != null) { |
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63 log.debug("Got static wst values from cache"); |
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64 return (WKms)element.getValue(); |
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65 } |
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66 } |
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67 else { |
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68 cacheKey = null; |
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69 } |
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70 |
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71 WKms values = getWKmsUncached(column, wst_id); |
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72 |
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73 if (values != null && cacheKey != null) { |
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74 log.debug("Store static wst values in cache."); |
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75 Element element = new Element(cacheKey, values); |
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76 cache.put(element); |
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77 } |
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78 return values; |
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79 } |
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80 |
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81 /** Get name for a WKms. */ |
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82 public static String getWKmsName(int wst_id) { |
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83 log.debug("WKmsFactory.getWKmsName wst_id/" + wst_id); |
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84 |
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85 String name = null; |
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86 Session session = SessionHolder.HOLDER.get(); |
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87 |
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88 SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_WST_NAME) |
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89 .addScalar("description", StandardBasicTypes.STRING); |
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90 nameQuery.setInteger("wst_id", wst_id); |
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91 |
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92 List<String> names = nameQuery.list(); |
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93 if (names.size() >= 1) { |
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94 name = names.get(0); |
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95 } |
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96 |
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97 return name; |
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98 } |
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99 |
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100 /** Get name for a WKms. */ |
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101 public static String getWKmsName(int column, int wst_id) { |
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102 log.debug("WKmsFactory.getWKmsName c/" + column + ", wst_id/" + wst_id); |
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103 |
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104 String name = null; |
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105 Session session = SessionHolder.HOLDER.get(); |
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106 |
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107 SQLQuery nameQuery = session.createSQLQuery(SQL_SELECT_NAME) |
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108 .addScalar("name", StandardBasicTypes.STRING); |
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109 nameQuery.setInteger("wst_id", wst_id); |
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110 nameQuery.setInteger("column_pos", column); |
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111 |
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112 List<String> names = nameQuery.list(); |
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113 if (names.size() >= 1) { |
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114 name = names.get(0); |
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115 } |
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116 |
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117 return name; |
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118 } |
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119 |
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120 |
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121 /** |
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122 * Get WKms from db. |
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123 * @param column the position columns value |
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124 * @param wst_id database id of the wst |
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125 * @return according WKms. |
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126 */ |
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127 public static WKms getWKmsUncached(int column, int wst_id) { |
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128 |
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129 if (log.isDebugEnabled()) { |
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130 log.debug("WKmsFactory.getWKmsUncached c/" + column + ", wst_id/" + wst_id); |
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131 } |
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132 |
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133 WKmsImpl wkms = new WKmsImpl(getWKmsName(column, wst_id)); |
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134 |
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135 Session session = SessionHolder.HOLDER.get(); |
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136 SQLQuery sqlQuery = session.createSQLQuery(SQL_SELECT_WS) |
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137 .addScalar("km", StandardBasicTypes.DOUBLE) |
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138 .addScalar("w", StandardBasicTypes.DOUBLE); |
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139 sqlQuery.setInteger("wst_id", wst_id); |
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140 sqlQuery.setInteger("column_pos", column); |
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141 |
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142 List<Object []> results = sqlQuery.list(); |
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143 |
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144 for (int i = 0, N = results.size(); i < N; i++) { |
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145 Object[] row = results.get(i); |
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146 wkms.add((Double) row[0], (Double) row[1]); |
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147 } |
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148 |
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149 return wkms; |
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150 } |
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151 } |
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152 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |