Mercurial > dive4elements > river

annotate flys-artifacts/src/main/java/de/intevation/flys/artifacts/datacage/Datacage.java @ 984:2b05c4a0c6fd

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Datacage: clear database before initial scan flys-artifacts/trunk@2416 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 28 Jul 2011 14:26:01 +0000
parents 4ea5f5a2284e
children 70545233f8ee
rev   line source
982
66b3f2f064de Added the datacage as lifetime listener to the artifact database to create the initial index.
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1 package de.intevation.flys.artifacts.datacage;
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2
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3 import java.sql.SQLException;
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4
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5 import de.intevation.artifacts.GlobalContext;
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6
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7 import de.intevation.artifactdatabase.db.SQL;
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8 import de.intevation.artifactdatabase.db.SQLExecutor;
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9
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10 import de.intevation.artifactdatabase.LifetimeListener;
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12 import de.intevation.artifacts.Artifact;
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13 import de.intevation.artifacts.ArtifactDatabase;
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14 import de.intevation.artifacts.ArtifactDatabaseException;
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15
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16 import de.intevation.flys.artifacts.FLYSArtifact;
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17
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18 import de.intevation.artifacts.common.utils.LRUCache;
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20 import org.apache.log4j.Logger;
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21
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22 import org.w3c.dom.Document;
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23
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24 public class Datacage
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25 implements LifetimeListener
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26 {
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27 private static Logger log = Logger.getLogger(Datacage.class);
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28
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29 public static final String ARTEFACT_DATABASE_KEY =
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30 "global.artifact.database";
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31
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32 private String SQL_DELETE_ALL_USERS = "delete.all.users";
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33 private String SQL_INSERT_USER = "insert.user";
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34
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35 protected SQLExecutor sqlExecutor;
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37 public class InitialScan
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38 implements ArtifactDatabase.ArtifactLoadedCallback
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39 {
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40 protected LRUCache<String, Integer> users;
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41
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42 public InitialScan() {
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43 }
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44
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45 @Override
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46 public void artifactLoaded(
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47 String userId,
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48 String collectionId,
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49 String artifactId,
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50 Artifact artifact
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51 ) {
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52 if (!(artifact instanceof FLYSArtifact)) {
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53 log.warn("ignoring none FLYS artifacts");
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54 return;
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55 }
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56
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57 FLYSArtifact flysArtifact = (FLYSArtifact)artifact;
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58 // TODO: implement me!
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59 }
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60
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61 public boolean scan(ArtifactDatabase adb) {
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62 try {
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63 adb.loadAllArtifacts(this);
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64 }
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65 catch (ArtifactDatabaseException ade) {
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66 log.error(ade);
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67 return false;
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68 }
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69 return true;
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70 }
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71 } // class InitialScan
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72
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73
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74 public Datacage() {
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75 }
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76
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77 @Override
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78 public void setup(Document document) {
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79 log.debug("setup");
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80 DBConfig config = DBConfig.getInstance();
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81 setupSQL(config.getSQL());
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82 sqlExecutor = new SQLExecutor(config.getDBConnection());
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83 }
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85 protected void setupSQL(SQL sql) {
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86 SQL_DELETE_ALL_USERS = sql.get(SQL_DELETE_ALL_USERS);
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87 SQL_INSERT_USER = sql.get(SQL_INSERT_USER);
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88 }
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89
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90 @Override
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91 public void systemUp(GlobalContext context) {
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92 log.debug("systemUp");
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93 initialScan(context);
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94 }
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95
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96 protected void initialScan(GlobalContext context) {
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97 log.debug("initialScan");
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98
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99 Object adbObject = context.get(ARTEFACT_DATABASE_KEY);
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100
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101 if (!(adbObject instanceof ArtifactDatabase)) {
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102 log.error("missing artefact database. Cannot scan");
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103 return;
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104 }
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105
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106 ArtifactDatabase adb = (ArtifactDatabase)adbObject;
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107
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108 if (!cleanDatabase()) {
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109 log.error("cleaning database failed");
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110 return;
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111 }
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112
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113 InitialScan is = new InitialScan();
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114
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115 if (!is.scan(adb)) {
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116 log.error("initial scan failed");
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117 return;
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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 protected boolean cleanDatabase() {
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123
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124 return sqlExecutor.new Instance() {
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125 @Override
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126 public boolean doIt() throws SQLException {
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127 prepareStatement(SQL_DELETE_ALL_USERS);
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128 stmnt.execute();
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129 return true;
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130 }
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131 }.runWrite();
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132 }
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133
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134
982
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135 @Override
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136 public void systemDown(GlobalContext context) {
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137 log.debug("systemDown");
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138 }
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139 }
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140 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org