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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java @ 41:5e4bc24ea438

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Made serilization more flexible. DB update required!!! Fixed problem with touching artifacts in database. artifacts/trunk@119 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Wed, 23 Sep 2009 16:55:12 +0000
parents f7d2cd59a0d5
children 4ae4dc99127d
rev   line source
13
0d6badf6af42 Added not yet working backend to artifact database.
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1 package de.intevation.artifactdatabase;
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2
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3 import java.util.HashMap;
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4 import java.util.HashSet;
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5 import java.util.ArrayList;
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6 import java.util.List;
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7
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8 import de.intevation.artifacts.ArtifactDatabaseException;
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9 import de.intevation.artifacts.ArtifactDatabase;
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10 import de.intevation.artifacts.ArtifactFactory;
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11 import de.intevation.artifacts.Artifact;
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12 import de.intevation.artifacts.CallContext;
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13
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14 import de.intevation.artifactdatabase.Backend.PersistentArtifact;
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15
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16 import org.apache.log4j.Logger;
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17
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18 import org.w3c.dom.Document;
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19
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20 import java.io.OutputStream;
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21 import java.io.IOException;
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22
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23 /**
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24 * @author Sascha L. Teichmann
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25 */
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26 public class ArtifactDatabaseImpl
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27 implements ArtifactDatabase, Id.Filter, Backend.FactoryLookup
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28 {
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29 private static Logger logger =
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30 Logger.getLogger(ArtifactDatabaseImpl.class);
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31
32
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32 public static final String NO_SUCH_FACTORY =
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33 "No such factory";
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34
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35 public static final String NO_SUCH_ARTIFACT =
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36 "No such artifact";
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37
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38 public static final String NOT_IN_BACKGROUND =
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39 "Not in background";
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40
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41 public static final String INVALID_CALL_STATE =
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42 "Invalid after call state";
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43
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44 public static final String CREATION_FAILED =
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45 "Creation of artifact failed";
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46
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47 public static final String INTERNAL_ERROR =
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48 "Creation of artifact failed";
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49
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50 public class CallContextImpl
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51 implements CallContext
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52 {
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53 protected PersistentArtifact artifact;
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54 protected int action;
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55
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56 public CallContextImpl(PersistentArtifact artifact, int action) {
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57 this.artifact = artifact;
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58 this.action = action;
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59 }
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60
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61 public void afterCall(int action) {
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62 this.action = action;
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63 if (action == BACKGROUND) {
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64 addIdToBackground(artifact.getId());
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65 }
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66 }
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67
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68 public void afterBackground(int action) {
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69 if (this.action != BACKGROUND) {
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70 throw new IllegalStateException(NOT_IN_BACKGROUND);
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71 }
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72 fromBackground(artifact, action);
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73 }
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74
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75 public Object globalContext() {
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76 return context;
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77 }
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78
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79 public void postCall() {
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80 switch (action) {
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81 case NOTHING:
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82 break;
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83 case TOUCH:
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84 artifact.touch();
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85 break;
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86 case STORE:
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87 artifact.store();
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88 break;
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89 case BACKGROUND:
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90 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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91 artifact.store();
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92 break;
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93 default:
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94 logger.error(INVALID_CALL_STATE + ": " + action);
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95 throw new IllegalStateException(INVALID_CALL_STATE);
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96 }
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97 }
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98 } // class CallContextImpl
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99
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100 public class DeferredOutputImpl
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101 implements DeferredOutput
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102 {
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103 protected PersistentArtifact artifact;
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104 protected Document format;
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105
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106 public DeferredOutputImpl() {
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107 }
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108
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109 public DeferredOutputImpl(
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110 PersistentArtifact artifact,
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111 Document format
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112 ) {
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113 this.artifact = artifact;
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114 this.format = format;
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115 }
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116
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117 public void write(OutputStream output) throws IOException {
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118
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119 CallContextImpl cc = new CallContextImpl(
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120 artifact, CallContext.TOUCH);
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121
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122 try {
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123 artifact.getArtifact().out(format, output, cc);
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124 }
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125 finally {
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126 cc.postCall();
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127 }
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128 }
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129 } // class DeferredOutputImpl
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130
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131 protected String [][] factoryNamesAndDescription;
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132 protected HashMap name2factory;
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133
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134 protected Backend backend;
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135 protected Object context;
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136
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137 protected HashSet backgroundIds;
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138
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139 public ArtifactDatabaseImpl() {
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140 }
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141
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142 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap) {
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143 this(bootstrap, null);
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144 }
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145
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146 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap, Backend backend) {
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147
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148 backgroundIds = new HashSet();
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149 name2factory = new HashMap();
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150
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151 ArtifactFactory [] factories = bootstrap.getArtifactFactories();
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152 factoryNamesAndDescription = new String[factories.length][];
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153
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154 for (int i = 0; i < factories.length; ++i) {
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155
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156 ArtifactFactory factory = factories[i];
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157
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158 String name = factory.getName();
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159 String description = factory.getDescription();
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160
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161 factoryNamesAndDescription[i] =
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162 new String [] { name, description };
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163
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164 name2factory.put(name, factory);
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165 }
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166
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167 context = bootstrap.getContext();
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168
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169 wireWithBackend(backend);
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170 }
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171
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172 public void wireWithBackend(Backend backend) {
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173 if (backend != null) {
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174 this.backend = backend;
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175 backend.setFactoryLookup(this);
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176 }
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177 }
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178
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179 protected void fromBackground(PersistentArtifact artifact, int action) {
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180 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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181 switch (action) {
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182 case CallContext.NOTHING:
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183 break;
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184 case CallContext.TOUCH:
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185 artifact.touch();
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186 break;
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187 case CallContext.STORE:
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188 artifact.store();
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189 break;
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190 default:
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191 logger.warn("operation not allowed in fromBackground");
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192 }
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193 removeIdFromBackground(artifact.getId());
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194 }
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195
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196 protected void removeIdFromBackground(int id) {
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197 synchronized (backgroundIds) {
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198 backgroundIds.remove(Integer.valueOf(id));
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199 }
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200 }
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201
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202 protected void addIdToBackground(int id) {
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203 synchronized (backgroundIds) {
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204 backgroundIds.add(Integer.valueOf(id));
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205 }
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206 }
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207
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208 public List filterIds(List ids) {
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209 int N = ids.size();
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210 ArrayList out = new ArrayList(N);
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211 synchronized (backgroundIds) {
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212 for (int i = 0; i < N; ++i) {
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213 Id id = (Id)ids.get(i);
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214 if (!backgroundIds.contains(Integer.valueOf(id.getId()))) {
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215 out.add(id);
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216 }
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217 }
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218 }
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219 return out;
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220 }
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221
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222 public String [][] artifactFactoryNamesAndDescriptions() {
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223 return factoryNamesAndDescription;
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224 }
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225
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226 public ArtifactFactory getArtifactFactory(String factoryName) {
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227 return (ArtifactFactory)name2factory.get(factoryName);
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228 }
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229
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230 public Document createArtifactWithFactory(String factoryName)
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231 throws ArtifactDatabaseException
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232 {
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233 ArtifactFactory factory = getArtifactFactory(factoryName);
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234
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235 if (factory == null) {
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236 throw new ArtifactDatabaseException(NO_SUCH_FACTORY);
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237 }
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238
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239 Artifact artifact = factory.createArtifact(
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240 backend.newIdentifier(),
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241 context);
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242
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243 if (artifact == null) {
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244 throw new ArtifactDatabaseException(CREATION_FAILED);
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245 }
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246
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247 PersistentArtifact persistentArtifact;
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248
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249 try {
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250 persistentArtifact = backend.storeInitially(
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251 artifact,
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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252 factory,
32
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253 factory.timeToLiveUntouched(artifact, context));
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254 }
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255 catch (Exception e) {
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256 logger.error(e.getLocalizedMessage(), e);
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257 throw new ArtifactDatabaseException(CREATION_FAILED);
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258 }
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259
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260 CallContextImpl cc = new CallContextImpl(
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261 persistentArtifact, CallContext.NOTHING);
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262
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263 try {
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264 return artifact.describe(cc);
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265 }
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266 finally {
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267 cc.postCall();
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268 }
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269 }
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270
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271 public Document describe(String identifier)
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272 throws ArtifactDatabaseException
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273 {
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274 // TODO: Handle background tasks
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275 PersistentArtifact artifact = backend.getArtifact(identifier);
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276
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277 if (artifact == null) {
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278 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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279 }
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280
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281 CallContextImpl cc = new CallContextImpl(
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282 artifact, CallContext.TOUCH);
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283
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284 try {
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285 return artifact.getArtifact().describe(cc);
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286 }
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287 finally {
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288 cc.postCall();
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289 }
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290 }
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291
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292 public Document advance(String identifier, Document target)
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293 throws ArtifactDatabaseException
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294 {
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295 // TODO: Handle background tasks
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296 PersistentArtifact artifact = backend.getArtifact(identifier);
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297
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298 if (artifact == null) {
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299 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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300 }
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301
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302 CallContextImpl cc = new CallContextImpl(
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303 artifact, CallContext.STORE);
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304
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305 try {
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306 return artifact.getArtifact().advance(target, cc);
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307 }
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308 finally {
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309 cc.postCall();
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310 }
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311 }
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312
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313 public Document feed(String identifier, Document data)
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314 throws ArtifactDatabaseException
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315 {
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316 // TODO: Handle background tasks
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317 PersistentArtifact artifact = backend.getArtifact(identifier);
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318
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319 if (artifact == null) {
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320 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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321 }
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322
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323 CallContextImpl cc = new CallContextImpl(
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324 artifact, CallContext.STORE);
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325
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326 try {
36
f7d2cd59a0d5 Bugfix done. Now the feed Method works fine
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327 return artifact.getArtifact().feed(data, cc);
32
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328 }
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329 finally {
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330 cc.postCall();
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331 }
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332 }
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333
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334 public DeferredOutput out(String identifier, Document format)
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335 throws ArtifactDatabaseException
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336 {
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337 // TODO: Handle background tasks
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338 PersistentArtifact artifact = backend.getArtifact(identifier);
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339
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340 if (artifact == null) {
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diff changeset
341 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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diff changeset
342 }
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343
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344 return new DeferredOutputImpl(artifact, format);
13
0d6badf6af42 Added not yet working backend to artifact database.
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parents:
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345 }
0d6badf6af42 Added not yet working backend to artifact database.
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parents:
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346 }
0d6badf6af42 Added not yet working backend to artifact database.
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parents:
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347 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org