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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java @ 57:cf9848c85755 0.2

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RELEASE 0.2: Summarized NEWS and Changes artifacts/trunk@338 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Hans Plum <hans.plum@intevation.de>
date Fri, 13 Nov 2009 18:37:51 +0000
parents 9a29899b31e5
children 39fec7d714dc
rev   line source
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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 import de.intevation.artifacts.CallMeta;
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14
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15 import de.intevation.artifactdatabase.Backend.PersistentArtifact;
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17 import org.apache.log4j.Logger;
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19 import org.w3c.dom.Document;
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21 import java.io.OutputStream;
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22 import java.io.IOException;
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23
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24 /**
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25 * @author Sascha L. Teichmann
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26 */
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27 public class ArtifactDatabaseImpl
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28 implements ArtifactDatabase, Id.Filter, Backend.FactoryLookup
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29 {
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30 private static Logger logger =
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31 Logger.getLogger(ArtifactDatabaseImpl.class);
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32
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33 public static final String NO_SUCH_FACTORY =
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34 "No such factory";
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35
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36 public static final String NO_SUCH_ARTIFACT =
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37 "No such artifact";
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38
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39 public static final String NOT_IN_BACKGROUND =
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40 "Not in background";
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41
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42 public static final String INVALID_CALL_STATE =
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43 "Invalid after call state";
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44
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45 public static final String CREATION_FAILED =
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46 "Creation of artifact failed";
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47
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48 public static final String INTERNAL_ERROR =
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49 "Creation of artifact failed";
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50
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51 public class CallContextImpl
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52 implements CallContext
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53 {
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54 protected PersistentArtifact artifact;
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55 protected int action;
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56 protected CallMeta callMeta;
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57
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58 public CallContextImpl(
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59 PersistentArtifact artifact,
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60 int action,
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61 CallMeta callMeta
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62 ) {
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63 this.artifact = artifact;
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64 this.action = action;
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65 this.callMeta = callMeta;
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66 }
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67
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68 public void afterCall(int action) {
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69 this.action = action;
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70 if (action == BACKGROUND) {
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71 addIdToBackground(artifact.getId());
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72 }
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73 }
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74
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75 public void afterBackground(int action) {
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76 if (this.action != BACKGROUND) {
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77 throw new IllegalStateException(NOT_IN_BACKGROUND);
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78 }
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79 fromBackground(artifact, action);
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80 }
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81
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82 public Object globalContext() {
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83 return context;
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84 }
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85
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86 public CallMeta getMeta() {
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87 return callMeta;
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88 }
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89
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90 public void postCall() {
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91 switch (action) {
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92 case NOTHING:
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93 break;
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94 case TOUCH:
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95 artifact.touch();
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96 break;
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97 case STORE:
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98 artifact.store();
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99 break;
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100 case BACKGROUND:
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101 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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102 artifact.store();
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103 break;
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104 default:
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105 logger.error(INVALID_CALL_STATE + ": " + action);
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106 throw new IllegalStateException(INVALID_CALL_STATE);
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107 }
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108 }
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109 } // class CallContextImpl
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110
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111 public class DeferredOutputImpl
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112 implements DeferredOutput
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113 {
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114 protected PersistentArtifact artifact;
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115 protected Document format;
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116 protected CallMeta callMeta;
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117
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118 public DeferredOutputImpl() {
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119 }
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120
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121 public DeferredOutputImpl(
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122 PersistentArtifact artifact,
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123 Document format,
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124 CallMeta callMeta
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125 ) {
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126 this.artifact = artifact;
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127 this.format = format;
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128 this.callMeta = callMeta;
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129 }
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130
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131 public void write(OutputStream output) throws IOException {
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132
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133 CallContextImpl cc = new CallContextImpl(
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134 artifact, CallContext.TOUCH, callMeta);
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135
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136 try {
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137 artifact.getArtifact().out(format, output, cc);
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138 }
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139 finally {
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140 cc.postCall();
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141 }
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142 }
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143 } // class DeferredOutputImpl
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144
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145 protected String [][] factoryNamesAndDescription;
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146 protected HashMap name2factory;
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147
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148 protected Backend backend;
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149 protected Object context;
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150
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151 protected HashSet backgroundIds;
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152
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153 public ArtifactDatabaseImpl() {
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154 }
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155
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156 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap) {
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157 this(bootstrap, null);
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158 }
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159
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160 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap, Backend backend) {
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161
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162 backgroundIds = new HashSet();
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163 name2factory = new HashMap();
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164
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165 ArtifactFactory [] factories = bootstrap.getArtifactFactories();
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166 factoryNamesAndDescription = new String[factories.length][];
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167
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168 for (int i = 0; i < factories.length; ++i) {
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169
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170 ArtifactFactory factory = factories[i];
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171
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172 String name = factory.getName();
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173 String description = factory.getDescription();
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174
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175 factoryNamesAndDescription[i] =
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176 new String [] { name, description };
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177
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178 name2factory.put(name, factory);
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179 }
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180
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181 context = bootstrap.getContext();
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182
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183 wireWithBackend(backend);
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184 }
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185
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186 public void wireWithBackend(Backend backend) {
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187 if (backend != null) {
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188 this.backend = backend;
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189 backend.setFactoryLookup(this);
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190 }
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191 }
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192
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193 protected void fromBackground(PersistentArtifact artifact, int action) {
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194 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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195 switch (action) {
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196 case CallContext.NOTHING:
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197 break;
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198 case CallContext.TOUCH:
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199 artifact.touch();
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200 break;
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201 case CallContext.STORE:
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202 artifact.store();
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203 break;
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204 default:
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205 logger.warn("operation not allowed in fromBackground");
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206 }
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207 removeIdFromBackground(artifact.getId());
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208 }
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209
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210 protected void removeIdFromBackground(int id) {
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211 synchronized (backgroundIds) {
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212 backgroundIds.remove(Integer.valueOf(id));
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213 }
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214 }
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215
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216 protected void addIdToBackground(int id) {
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217 synchronized (backgroundIds) {
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218 backgroundIds.add(Integer.valueOf(id));
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219 }
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220 }
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221
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222 public List filterIds(List ids) {
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223 int N = ids.size();
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224 ArrayList out = new ArrayList(N);
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225 synchronized (backgroundIds) {
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226 for (int i = 0; i < N; ++i) {
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227 Id id = (Id)ids.get(i);
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228 if (!backgroundIds.contains(Integer.valueOf(id.getId()))) {
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229 out.add(id);
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230 }
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231 }
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232 }
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233 return out;
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234 }
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235
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236 public String [][] artifactFactoryNamesAndDescriptions() {
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237 return factoryNamesAndDescription;
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238 }
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239
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240 public ArtifactFactory getArtifactFactory(String factoryName) {
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241 return (ArtifactFactory)name2factory.get(factoryName);
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242 }
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243
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244 public Document createArtifactWithFactory(
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245 String factoryName,
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246 CallMeta callMeta
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247 )
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248 throws ArtifactDatabaseException
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249 {
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250 ArtifactFactory factory = getArtifactFactory(factoryName);
32
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251
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252 if (factory == null) {
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253 throw new ArtifactDatabaseException(NO_SUCH_FACTORY);
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254 }
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255
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256 Artifact artifact = factory.createArtifact(
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257 backend.newIdentifier(),
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258 context);
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259
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diff changeset
260 if (artifact == null) {
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261 throw new ArtifactDatabaseException(CREATION_FAILED);
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262 }
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263
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264 PersistentArtifact persistentArtifact;
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265
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266 try {
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267 persistentArtifact = backend.storeInitially(
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268 artifact,
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269 factory,
32
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270 factory.timeToLiveUntouched(artifact, context));
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271 }
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272 catch (Exception e) {
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273 logger.error(e.getLocalizedMessage(), e);
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274 throw new ArtifactDatabaseException(CREATION_FAILED);
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275 }
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276
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277 CallContextImpl cc = new CallContextImpl(
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278 persistentArtifact, CallContext.NOTHING, callMeta);
32
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279
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280 try {
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9a29899b31e5 describe() in REST interface is also handled as POST to pass
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281 return artifact.describe(null, cc);
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282 }
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283 finally {
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284 cc.postCall();
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285 }
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286 }
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287
55
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288 public Document describe(String identifier, Document data, CallMeta callMeta)
32
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289 throws ArtifactDatabaseException
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290 {
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291 // TODO: Handle background tasks
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292 PersistentArtifact artifact = backend.getArtifact(identifier);
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293
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294 if (artifact == null) {
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295 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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296 }
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297
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298 CallContextImpl cc = new CallContextImpl(
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299 artifact, CallContext.TOUCH, callMeta);
32
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300
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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301 try {
55
9a29899b31e5 describe() in REST interface is also handled as POST to pass
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302 return artifact.getArtifact().describe(data, cc);
32
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303 }
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304 finally {
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305 cc.postCall();
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306 }
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307 }
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308
48
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309 public Document advance(String identifier, Document target, CallMeta callMeta)
32
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310 throws ArtifactDatabaseException
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311 {
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312 // TODO: Handle background tasks
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313 PersistentArtifact artifact = backend.getArtifact(identifier);
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314
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315 if (artifact == null) {
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316 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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317 }
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diff changeset
318
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
319 CallContextImpl cc = new CallContextImpl(
48
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diff changeset
320 artifact, CallContext.STORE, callMeta);
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diff changeset
321
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
322 try {
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323 return artifact.getArtifact().advance(target, cc);
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diff changeset
324 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
325 finally {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
326 cc.postCall();
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diff changeset
327 }
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
328 }
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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329
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
330 public Document feed(String identifier, Document data, CallMeta callMeta)
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diff changeset
331 throws ArtifactDatabaseException
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
332 {
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diff changeset
333 // TODO: Handle background tasks
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diff changeset
334 PersistentArtifact artifact = backend.getArtifact(identifier);
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diff changeset
335
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
336 if (artifact == null) {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
337 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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diff changeset
338 }
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diff changeset
339
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
340 CallContextImpl cc = new CallContextImpl(
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
341 artifact, CallContext.STORE, callMeta);
32
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diff changeset
342
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
343 try {
36
f7d2cd59a0d5 Bugfix done. Now the feed Method works fine
Tim Englich <tim.englich@intevation.de>
parents: 32
diff changeset
344 return artifact.getArtifact().feed(data, cc);
32
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diff changeset
345 }
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diff changeset
346 finally {
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diff changeset
347 cc.postCall();
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diff changeset
348 }
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diff changeset
349 }
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diff changeset
350
48
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351 public DeferredOutput out(String identifier, Document format, CallMeta callMeta)
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
352 throws ArtifactDatabaseException
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diff changeset
353 {
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diff changeset
354 // TODO: Handle background tasks
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diff changeset
355 PersistentArtifact artifact = backend.getArtifact(identifier);
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parents: 26
diff changeset
356
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diff changeset
357 if (artifact == null) {
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diff changeset
358 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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parents: 26
diff changeset
359 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
360
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
361 return new DeferredOutputImpl(artifact, format, callMeta);
13
0d6badf6af42 Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
362 }
0d6badf6af42 Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
363 }
0d6badf6af42 Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
364 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org