Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/Backend.java @ 31:c4d85a8532d1
Artifact.out() is now called with an java.io.Outpustream
instead of producing bytes.
artifacts/trunk@77 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Sascha L. Teichmann <sascha.teichmann@intevation.de> |
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date | Sat, 12 Sep 2009 10:45:28 +0000 |
parents | 88972c6daa4f |
children | c2d53bd30ab8 |
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1 package de.intevation.artifactdatabase; |
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2 |
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3 import org.w3c.dom.Document; |
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4 |
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5 import java.util.UUID; |
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6 |
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7 import java.sql.Connection; |
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8 import java.sql.SQLException; |
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9 import java.sql.PreparedStatement; |
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10 import java.sql.Types; |
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11 import java.sql.ResultSet; |
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12 |
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13 import javax.sql.DataSource; |
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14 |
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15 import java.io.IOException; |
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16 import java.io.ByteArrayInputStream; |
14
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17 import java.io.ByteArrayOutputStream; |
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18 import java.io.ObjectOutputStream; |
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19 import java.io.ObjectInputStream; |
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20 import java.io.OutputStream; |
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21 |
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22 import java.util.zip.GZIPOutputStream; |
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23 import java.util.zip.GZIPInputStream; |
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24 |
13
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25 import de.intevation.artifacts.ArtifactFactory; |
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26 import de.intevation.artifacts.Artifact; |
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27 |
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28 import org.apache.log4j.Logger; |
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29 |
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30 /** |
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31 * @author Sascha L. Teichmann |
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32 */ |
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33 public class Backend |
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34 { |
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35 private static Logger logger = Logger.getLogger(Backend.class); |
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36 |
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37 public static final String SQL_NEXT_ID = |
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38 SQL.get("artifacts.id.nextval"); |
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39 |
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40 public static final String SQL_INSERT = |
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41 SQL.get("artifacts.insert"); |
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42 |
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43 public static final String SQL_UPDATE = |
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44 SQL.get("artifacts.update"); |
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45 |
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46 public static final String SQL_TOUCH = |
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47 SQL.get("artifacts.touch"); |
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48 |
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49 public static final String SQL_LOAD_BY_GID = |
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50 SQL.get("artifacts.select.gid"); |
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51 |
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52 protected DatabaseCleaner cleaner; |
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53 |
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54 /** |
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55 * Used to wrap the calls to invole database actions. |
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56 */ |
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57 public class ArtifactProxy |
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58 implements Artifact |
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59 { |
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60 protected Artifact original; |
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61 protected int id; |
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62 protected boolean unwritten; |
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63 |
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64 public ArtifactProxy() { |
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65 } |
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66 |
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67 public ArtifactProxy(Artifact original, int id, boolean unwritten) { |
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68 this.original = original; |
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69 this.id = id; |
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70 this.unwritten = unwritten; |
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71 } |
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72 |
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73 public Artifact getOriginal() { |
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74 return original; |
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75 } |
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76 |
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77 public int getId() { |
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78 return id; |
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79 } |
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80 |
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81 public boolean isUnwritten() { |
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82 return unwritten; |
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83 } |
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84 |
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85 public String identifier() { |
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86 return original.identifier(); |
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87 } |
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88 |
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89 public String hash() { |
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90 return original.hash(); |
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91 } |
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92 |
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93 public Document describe(Object context) { |
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94 try { |
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95 return original.describe(context); |
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96 } |
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97 finally { |
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98 touch(this); |
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99 } |
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100 } |
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101 |
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102 public Document advance(Document target, Object context) { |
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103 try { |
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104 return original.advance(target, context); |
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105 } |
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106 finally { |
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107 store(this); |
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108 } |
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109 } |
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110 |
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111 public Document feed(Document data, Object context) { |
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112 try { |
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113 return original.feed(data, context); |
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114 } |
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115 finally { |
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116 store(this); |
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117 } |
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118 } |
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119 |
31
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120 public void out( |
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121 Document format, |
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122 OutputStream output, |
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123 Object context |
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124 ) |
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125 throws IOException |
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126 { |
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127 try { |
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128 original.out(format, output, context); |
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129 } |
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130 finally { |
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131 touch(this); |
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132 } |
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133 } |
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134 |
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135 public void setup(String identifier, ArtifactFactory factory, Object context) { |
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136 original.setup(identifier, factory, context); |
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137 } |
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138 |
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139 public void endOfLife(Object context) { |
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140 original.endOfLife(context); |
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141 } |
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142 |
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143 public byte [] toBytes() { |
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144 try { |
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145 ByteArrayOutputStream bos = new ByteArrayOutputStream(); |
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146 GZIPOutputStream gos = new GZIPOutputStream(bos); |
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147 ObjectOutputStream oos = new ObjectOutputStream(gos); |
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148 |
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149 oos.writeObject(original); |
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150 oos.flush(); |
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151 oos.close(); |
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152 |
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153 return bos.toByteArray(); |
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154 } |
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155 catch (IOException ioe) { |
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156 logger.error(ioe.getLocalizedMessage(), ioe); |
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157 throw new RuntimeException(ioe); |
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158 } |
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159 } |
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160 } // class ArtifactProxy |
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161 |
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162 public Backend() { |
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163 } |
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164 |
30
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165 public Backend(DatabaseCleaner cleaner) { |
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166 this.cleaner = cleaner; |
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167 } |
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168 |
13
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169 public Artifact getArtifact(String idenitfier) { |
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170 UUID uuid; |
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171 |
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172 try { |
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173 uuid = UUID.fromString(idenitfier); |
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174 } |
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175 catch (IllegalArgumentException iae) { |
17
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176 logger.warn(iae.getLocalizedMessage()); |
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177 return null; |
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178 } |
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179 |
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180 return getArtifactByUUID(uuid); |
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181 } |
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182 |
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183 public Artifact createArtifactWithFactory( |
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184 ArtifactFactory factory, Object context |
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185 ) { |
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186 UUID uuid = UUID.randomUUID(); |
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187 Artifact artifact = factory.createArtifact( |
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188 uuid.toString(), context); |
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189 |
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190 Long ttl = factory.timeToLiveUntouched( |
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191 artifact, context); |
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192 |
26
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193 try { |
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194 int id = insertDatabase(uuid, ttl); |
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195 return new ArtifactProxy(artifact, id, true); |
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196 } |
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197 catch (Exception e) { |
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198 logger.error(e.getLocalizedMessage(), e); |
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199 } |
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200 return null; |
13
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201 } |
14
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202 |
15
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203 protected Artifact getArtifactByUUID(UUID uuid) { |
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204 |
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205 Connection connection = null; |
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206 PreparedStatement stmnt_load = null; |
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207 ResultSet load_result = null; |
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208 |
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209 DataSource dataSource = DBConnection.getDataSource(); |
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210 try { |
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211 connection = dataSource.getConnection(); |
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212 stmnt_load = connection.prepareStatement(SQL_LOAD_BY_GID); |
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213 stmnt_load.setString(1, uuid.toString()); |
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214 |
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215 load_result = stmnt_load.executeQuery(); |
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|
216 |
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217 if (!load_result.next()) { |
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218 return null; |
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219 } |
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220 |
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221 int id = load_result.getInt(1); |
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222 long ttl = load_result.getLong(3); |
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223 |
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224 if (!load_result.wasNull()) { // real time to life |
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225 long last_access = load_result.getTimestamp(2).getTime(); |
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226 if (last_access + ttl > System.currentTimeMillis()) { |
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227 artifactOutdated(id); |
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228 return null; |
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229 } |
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230 } |
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231 |
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232 byte [] bytes = load_result.getBytes(4); |
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233 |
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234 if (bytes == null) { |
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235 return null; |
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236 } |
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237 |
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238 Artifact original = restoreArtifact(bytes); |
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239 if (original == null) { |
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240 return null; |
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241 } |
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242 |
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243 return new ArtifactProxy(original, id, false); |
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244 } |
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245 catch (SQLException sqle) { |
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246 logger.error(sqle.getLocalizedMessage(), sqle); |
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247 } |
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248 finally { |
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249 if (load_result != null) { |
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250 try { load_result.close(); } |
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251 catch (SQLException sqle) {} |
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252 } |
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253 if (stmnt_load != null) { |
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254 try { load_result.close(); } |
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255 catch (SQLException sqle) {} |
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256 } |
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257 if (connection != null) { |
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258 try { connection.close(); } |
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259 catch (SQLException sqle) {} |
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260 } |
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261 } |
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262 return null; |
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263 } |
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264 |
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265 public static Artifact restoreArtifact(byte [] bytes) { |
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266 |
30
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267 if (bytes == null) { |
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268 return null; |
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269 } |
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270 |
15
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271 ObjectInputStream ois = null; |
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272 |
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273 try { |
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274 ByteArrayInputStream bis = new ByteArrayInputStream(bytes); |
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275 GZIPInputStream gis = new GZIPInputStream(bis); |
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276 ois = new ObjectInputStream(gis); |
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277 |
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278 return (Artifact)ois.readObject(); |
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279 } |
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280 catch (IOException ioe) { |
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281 logger.error(ioe.getLocalizedMessage(), ioe); |
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282 } |
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283 catch (ClassNotFoundException cnfe) { |
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284 logger.error(cnfe.getLocalizedMessage(), cnfe); |
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285 } |
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286 catch (ClassCastException cce) { |
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287 logger.error(cce.getLocalizedMessage(), cce); |
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288 } |
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289 finally { |
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290 if (ois != null) { |
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291 try { ois.close(); } |
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292 catch (IOException ioe) { } |
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293 } |
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294 } |
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295 |
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296 return null; |
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297 } |
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298 |
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299 protected void artifactOutdated(int id) { |
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300 logger.info("artifactOutdated: id = " + id); |
30
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301 if (cleaner != null) { |
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302 cleaner.wakeup(); |
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303 } |
15
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304 } |
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305 |
14
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306 protected int insertDatabase(UUID uuid, Long ttl) { |
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307 Connection connection = null; |
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308 PreparedStatement stmnt_next_id = null; |
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309 PreparedStatement stmnt_insert = null; |
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310 ResultSet res_id = null; |
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311 |
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312 DataSource dataSource = DBConnection.getDataSource(); |
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313 try { |
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314 connection = dataSource.getConnection(); |
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315 try { |
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316 connection.setAutoCommit(false); |
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317 |
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318 stmnt_next_id = connection.prepareStatement(SQL_NEXT_ID); |
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319 stmnt_insert = connection.prepareStatement(SQL_INSERT); |
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320 |
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321 res_id = stmnt_next_id.executeQuery(); |
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322 |
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323 if (!res_id.next()) { |
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324 throw new RuntimeException("No id generated"); |
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325 } |
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326 |
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327 int id = res_id.getInt(1); |
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328 |
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329 stmnt_insert.setInt(1, id); |
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330 stmnt_insert.setString(2, uuid.toString()); |
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331 if (ttl == null) { |
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332 stmnt_insert.setNull(3, Types.BIGINT); |
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333 } |
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334 else { |
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335 stmnt_insert.setLong(3, ttl.longValue()); |
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336 } |
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337 |
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338 stmnt_insert.execute(); |
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339 |
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340 connection.commit(); |
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341 |
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342 return id; |
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Initial checkin of artigact persistents back by database.
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343 } |
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344 catch (SQLException sqle) { |
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345 connection.rollback(); |
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346 throw sqle; |
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Initial checkin of artigact persistents back by database.
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347 } |
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348 } |
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349 catch (SQLException sqle) { |
17
5a6b6a3debc7
Integrated logging into artifact database.
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350 logger.error(sqle.getLocalizedMessage(), sqle); |
14
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351 } |
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352 finally { |
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353 if (res_id != null) { |
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354 try { res_id.close(); } |
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355 catch (SQLException sqle) {} |
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Initial checkin of artigact persistents back by database.
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356 } |
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357 if (stmnt_insert != null) { |
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358 try { stmnt_insert.close(); } |
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Initial checkin of artigact persistents back by database.
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359 catch (SQLException sqle) {} |
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Initial checkin of artigact persistents back by database.
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360 } |
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Initial checkin of artigact persistents back by database.
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361 if (stmnt_next_id != null) { |
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Initial checkin of artigact persistents back by database.
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362 try { stmnt_next_id.close(); } |
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Initial checkin of artigact persistents back by database.
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363 catch (SQLException sqle) {} |
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Initial checkin of artigact persistents back by database.
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|
364 } |
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Initial checkin of artigact persistents back by database.
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365 if (connection != null) { |
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Initial checkin of artigact persistents back by database.
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366 try { connection.close(); } |
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Initial checkin of artigact persistents back by database.
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367 catch (SQLException sqle) {} |
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Initial checkin of artigact persistents back by database.
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|
368 } |
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Initial checkin of artigact persistents back by database.
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|
369 } |
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Initial checkin of artigact persistents back by database.
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370 throw new RuntimeException("failed insert artifact into database"); |
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Initial checkin of artigact persistents back by database.
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371 } |
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Initial checkin of artigact persistents back by database.
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372 |
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Initial checkin of artigact persistents back by database.
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373 public void touch(ArtifactProxy proxy) { |
26
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Connected /create with artifact db.
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374 |
14
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Initial checkin of artigact persistents back by database.
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375 if (proxy.isUnwritten()) { |
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Initial checkin of artigact persistents back by database.
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376 store(proxy); |
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Initial checkin of artigact persistents back by database.
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377 return; |
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Initial checkin of artigact persistents back by database.
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378 } |
26
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Connected /create with artifact db.
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|
379 |
14
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Initial checkin of artigact persistents back by database.
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|
380 try { |
26
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Connected /create with artifact db.
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381 Connection connection = null; |
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Connected /create with artifact db.
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|
382 PreparedStatement stmnt_touch = null; |
83a059c204f8
Connected /create with artifact db.
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|
383 DataSource dataSource = DBConnection.getDataSource(); |
14
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Initial checkin of artigact persistents back by database.
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|
384 try { |
26
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Connected /create with artifact db.
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|
385 connection = dataSource.getConnection(); |
83a059c204f8
Connected /create with artifact db.
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changeset
|
386 try { |
83a059c204f8
Connected /create with artifact db.
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changeset
|
387 connection.setAutoCommit(false); |
83a059c204f8
Connected /create with artifact db.
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|
388 stmnt_touch = connection.prepareStatement(SQL_UPDATE); |
83a059c204f8
Connected /create with artifact db.
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|
389 stmnt_touch.setInt(1, proxy.getId()); |
83a059c204f8
Connected /create with artifact db.
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|
390 stmnt_touch.execute(); |
83a059c204f8
Connected /create with artifact db.
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changeset
|
391 connection.commit(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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24
diff
changeset
|
392 } |
83a059c204f8
Connected /create with artifact db.
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parents:
24
diff
changeset
|
393 catch (SQLException sqle) { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
394 connection.rollback(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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24
diff
changeset
|
395 } |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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13
diff
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|
396 } |
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Initial checkin of artigact persistents back by database.
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13
diff
changeset
|
397 catch (SQLException sqle) { |
26
83a059c204f8
Connected /create with artifact db.
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parents:
24
diff
changeset
|
398 logger.error(sqle.getLocalizedMessage(), sqle); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
399 } |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
400 finally { |
83a059c204f8
Connected /create with artifact db.
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parents:
24
diff
changeset
|
401 if (stmnt_touch != null) { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
402 try { stmnt_touch.close(); } |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
403 catch (SQLException sqle) {} |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
404 } |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
405 if (connection != null) { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
406 try { connection.close(); } |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
407 catch (SQLException sqle) {} |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
408 } |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
409 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
410 } |
26
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
411 catch (Exception e) { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
412 logger.error(e.getLocalizedMessage(), e); |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
413 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
414 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
415 |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
13
diff
changeset
|
416 public void store(ArtifactProxy proxy) { |
26
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
417 |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
13
diff
changeset
|
418 try { |
26
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
419 Connection connection = null; |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
420 PreparedStatement stmnt_update = null; |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
421 DataSource dataSource = DBConnection.getDataSource(); |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
13
diff
changeset
|
422 try { |
26
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
423 connection = dataSource.getConnection(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
424 try { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
425 connection.setAutoCommit(false); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
426 stmnt_update = connection.prepareStatement(SQL_UPDATE); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
427 stmnt_update.setInt(2, proxy.getId()); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
428 |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
429 byte [] bytes = proxy.toBytes(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
430 |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
431 stmnt_update.setBytes(1, bytes); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
432 stmnt_update.execute(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
433 connection.commit(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
434 } |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
435 catch (SQLException sqle) { |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
436 connection.rollback(); |
83a059c204f8
Connected /create with artifact db.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
24
diff
changeset
|
437 } |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
438 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
13
diff
changeset
|
439 catch (SQLException sqle) { |
26
83a059c204f8
Connected /create with artifact db.
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parents:
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440 logger.error(sqle.getLocalizedMessage(), sqle); |
83a059c204f8
Connected /create with artifact db.
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parents:
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441 } |
83a059c204f8
Connected /create with artifact db.
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parents:
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442 finally { |
83a059c204f8
Connected /create with artifact db.
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parents:
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443 if (stmnt_update != null) { |
83a059c204f8
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parents:
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444 try { stmnt_update.close(); } |
83a059c204f8
Connected /create with artifact db.
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parents:
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445 catch (SQLException sqle) {} |
83a059c204f8
Connected /create with artifact db.
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parents:
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446 } |
83a059c204f8
Connected /create with artifact db.
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parents:
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447 if (connection != null) { |
83a059c204f8
Connected /create with artifact db.
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parents:
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448 try { connection.close(); } |
83a059c204f8
Connected /create with artifact db.
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parents:
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449 catch (SQLException sqle) {} |
83a059c204f8
Connected /create with artifact db.
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parents:
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450 } |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
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451 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
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452 } |
26
83a059c204f8
Connected /create with artifact db.
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parents:
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453 catch (Exception e) { |
83a059c204f8
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parents:
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454 logger.error(e.getLocalizedMessage(), e); |
14
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
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455 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
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456 } |
0d16d1bb2df0
Initial checkin of artigact persistents back by database.
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parents:
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457 |
13
0d6badf6af42
Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
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458 } |
0d6badf6af42
Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff
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459 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8: |