Mercurial > dive4elements > gnv-client

annotate gnv-artifacts/src/main/java/de/intevation/gnv/state/cache/ThematicDataCacheCleaner.java @ 1060:cc4ec127d666

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Remove the elements of an outdated state from cache if its endOfLife method is called. gnv-artifacts/trunk@1143 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Ingo Weinzierl <ingo.weinzierl@intevation.de>
date Tue, 01 Jun 2010 16:54:21 +0000
parents dfd02f8d3602
children f953c9a559d8
rev   line source
845
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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1 /**
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2 *
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3 */
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4 package de.intevation.gnv.state.cache;
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5
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6 import java.util.ArrayList;
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7 import java.util.Collection;
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8 import java.util.Iterator;
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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
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13 import org.apache.log4j.Logger;
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14 import org.w3c.dom.Document;
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15 import org.w3c.dom.Element;
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16 import org.w3c.dom.NodeList;
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17
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18 import de.intevation.artifactdatabase.Config;
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19 import de.intevation.gnv.artifacts.cache.CacheFactory;
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20 import de.intevation.gnv.geobackend.base.query.cache.CacheCleaner;
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21 import de.intevation.gnv.geobackend.base.query.container.QueryContainerFactory;
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22 import de.intevation.gnv.geobackend.base.query.container.exception.QueryContainerException;
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23 import de.intevation.gnv.geobackend.base.query.exception.QueryException;
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24 import de.intevation.gnv.state.StateBase;
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25 import de.intevation.gnv.utils.ArtifactXMLUtilities;
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26
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27
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28 /**
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29 * Extended Class of the CacheCleaner.
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30 * This Cleaner has the job to cleanup the ThematicData-Cache if it
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31 * is necessary.
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32 * @author <a href="mailto:tim.englich@intevation.de">Tim Englich</a>
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33 *
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34 */
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35 public class ThematicDataCacheCleaner extends CacheCleaner {
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36
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37 /**
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38 * the logger, used to log exceptions and additonaly information
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39 */
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40 private static Logger log = Logger.getLogger(ThematicDataCacheCleaner.class);
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41
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42 private final static String XPATH_ARTIFACTS =
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43 "/artifact-database/artifacts/artifact";
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44 private final static String XPATH_STATES = "states/state";
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45 private final static String XPATH_STATEID = "id";
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46 private final static String XPATH_QUERYID = "queryID";
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47
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48 /**
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49 * The Queries that should be Cleaned with its links to the
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50 * StateIds.
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51 */
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52 private Collection<QueryObject> queryObjects = null;
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53
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54 /**
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55 * Constructor
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56 */
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57 public ThematicDataCacheCleaner() {
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58 this.setUp();
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59 }
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60
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61 /**
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62 * Constructor
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63 * @param arg0
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64 */
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65 public ThematicDataCacheCleaner(Runnable arg0) {
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66 this.setUp();
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67 }
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68
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69 /**
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70 * Constructor
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71 * @param arg0
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72 */
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73 public ThematicDataCacheCleaner(String arg0) {
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74 this.setUp();
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75 }
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76
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77 /**
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78 * Constructor
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79 * @param arg0
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80 * @param arg1
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81 */
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82 public ThematicDataCacheCleaner(ThreadGroup arg0, Runnable arg1) {
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83 this.setUp();
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84 }
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85
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86 /**
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87 * Constructor
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88 * @param arg0
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89 * @param arg1
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90 */
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91 public ThematicDataCacheCleaner(ThreadGroup arg0, String arg1) {
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92 this.setUp();
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93 }
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94
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95 /**
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96 * Constructor
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97 * @param arg0
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98 * @param arg1
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99 */
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100 public ThematicDataCacheCleaner(Runnable arg0, String arg1) {
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101 this.setUp();
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102 }
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103
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104 /**
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105 * Constructor
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106 * @param arg0
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107 * @param arg1
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108 * @param arg2
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109 */
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110 public ThematicDataCacheCleaner(ThreadGroup arg0, Runnable arg1, String arg2) {
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111 this.setUp();
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112 }
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113
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114 /**
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115 * Constructor
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116 * @param arg0
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117 * @param arg1
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118 * @param arg2
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119 * @param arg3
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120 */
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121 public ThematicDataCacheCleaner(ThreadGroup arg0, Runnable arg1,
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122 String arg2, long arg3) {
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123 this.setUp();
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124 }
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125
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126 /**
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127 * Initializes the QueryObjects.
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128 * The Queryobjects will be read from the Configuration.
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129 * Only Queries which are defined in <code>queryID</code>-Elements
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130 * are used.
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131 * The other Queries are currently not put into the Cache.
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132 */
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133 @Override
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134 protected void setUp(){
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135 super.setUp();
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136 this.queryObjects = new ArrayList<QueryObject>();
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137 Document configuration = Config.getConfig();
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138 NodeList artifactList = Config.getNodeSetXPath(configuration,
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139 XPATH_ARTIFACTS);
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140 log.debug("ThematicDataCacheCleaner.setUp()");
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141 if (artifactList != null && artifactList.getLength() > 0){
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142 for (int i = 0; i < artifactList.getLength(); i++){
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143 Element currentArtifactNode = (Element)artifactList.item(i);
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144
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145 String link = currentArtifactNode.getAttribute("xlink:href");
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146 if (link != null && link.length() > 0){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
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147 String absolutFileName = Config.replaceConfigDir(link);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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148 currentArtifactNode = (Element)new ArtifactXMLUtilities()
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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149 .readConfiguration(absolutFileName);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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150 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
151 NodeList stateList = Config.getNodeSetXPath(currentArtifactNode,
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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152 XPATH_STATES);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
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153 if (stateList != null && stateList.getLength() > 0){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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154 for (int j = 0; j < stateList.getLength() ; j++){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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155 Element currentStateNode = (Element)stateList.item(j);
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parents:
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156 String stateId = currentStateNode
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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157 .getAttribute(XPATH_STATEID);
870
dfd02f8d3602 Removed trailing whitespace.
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158 String queryID = Config.getStringXPath(currentStateNode,
845
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159 XPATH_QUERYID);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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160 try {
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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161 if (queryID != null){
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Tim Englich <tim.englich@intevation.de>
parents:
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162 String query = QueryContainerFactory
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Tim Englich <tim.englich@intevation.de>
parents:
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163 .getInstance()
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Tim Englich <tim.englich@intevation.de>
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164 .getQueryContainer()
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
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165 .getQuery(queryID);
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Tim Englich <tim.englich@intevation.de>
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166 QueryObject qo = new QueryObject(stateId, query);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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167 queryObjects.add(qo);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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168 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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169 } catch (QueryContainerException e) {
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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170 log.error(e,e);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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171 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
172 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
173 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
174 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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175 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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176 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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177
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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178 @Override
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
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parents:
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179 protected void cleanup() {
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180 log.debug("ThematicDataCacheCleaner.cleanup");
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
181 try {
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
182 if (queryObjects != null && queryObjects.size() > 0){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
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183 String[] tableNames = this.getUpdatedTableNames();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
184 if (tableNames != null && tableNames.length > 0){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
185 Iterator<QueryObject> it = queryObjects.iterator();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
186 while (it.hasNext()){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
187 QueryObject qo = it.next();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
188 for (int i = 0; i < tableNames.length; i++){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
189 if (qo.queryContainsTableName(tableNames[i])){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
190 String stateId = qo.getStateId();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
191 this.cleanUpCache(stateId);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
192 break;
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
193 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
194 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
195 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
196 }else{
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
197 log.debug("No Tables found to cleanup.");
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
198 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
199 }else{
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
200 log.warn("No Queries to clean");
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
201 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
202 } catch (QueryException e) {
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
203 log.error(e,e);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
204 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
205 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
206
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
207 /**
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
208 * Removes the Entries which Keys matches to the <code>stateId</code>
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
209 * from the Cache.
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
210 * @param stateId The Id of the State which Entries has to be removed.
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
211 */
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
212 private void cleanUpCache(String stateId){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
213 log.debug("ThematicDataCacheCleaner.cleanUpCache "+stateId);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
214 CacheFactory factory = CacheFactory.getInstance();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
215 Cache cache = factory.getCache();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
216 List<String> keys = cache.getKeys();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
217 String keySample = StateBase.HASH_ID_SEPARATOR +
870
dfd02f8d3602 Removed trailing whitespace.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 845
diff changeset
218 stateId +
845
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
219 StateBase.HASH_ID_SEPARATOR;
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
220 if (keys != null && keys.size() > 0){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
221 Iterator<String> it = keys.iterator();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
222 while (it.hasNext()){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
223 String key = it.next();
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
224 if (key != null && key.contains(keySample)){
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
225 boolean removed = cache.remove(key);
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
226 if (!removed){
870
dfd02f8d3602 Removed trailing whitespace.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 845
diff changeset
227 log.warn("Object with Key " +
845
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
228 key + "could not be removed from Cache");
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
229 }else{
870
dfd02f8d3602 Removed trailing whitespace.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 845
diff changeset
230 log.debug("Object with Key " +
845
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
231 key + "has been removed from Cache");
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
232 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
233 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
234 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
235 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
236 }
797a6264b89b Integrated the CacheCleaner for the ThematicDataCache
Tim Englich <tim.englich@intevation.de>
parents:
diff changeset
237 }
http://dive4elements.wald.intevation.org