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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java @ 58:39fec7d714dc

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Added a real artifact proxy class to be more flexible with artifact replacements in artifact databases. artifacts/trunk@359 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Mon, 23 Nov 2009 11:15:44 +0000
parents 9a29899b31e5
children 89e3de0ee05f
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 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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16
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17 import org.apache.log4j.Logger;
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18
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19 import org.w3c.dom.Document;
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20
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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
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 protected HashMap customValues;
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58
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59 public CallContextImpl(
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60 PersistentArtifact artifact,
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61 int action,
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62 CallMeta callMeta
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63 ) {
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64 this.artifact = artifact;
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65 this.action = action;
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66 this.callMeta = callMeta;
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67 }
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68
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69 public void afterCall(int action) {
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70 this.action = action;
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71 if (action == BACKGROUND) {
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72 addIdToBackground(artifact.getId());
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73 }
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74 }
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75
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76 public void afterBackground(int action) {
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77 if (this.action != BACKGROUND) {
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78 throw new IllegalStateException(NOT_IN_BACKGROUND);
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79 }
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80 fromBackground(artifact, action);
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81 }
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82
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83 public Object globalContext() {
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84 return context;
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85 }
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86
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87 public CallMeta getMeta() {
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88 return callMeta;
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89 }
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90
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91 public void postCall() {
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92 switch (action) {
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93 case NOTHING:
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94 break;
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95 case TOUCH:
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96 artifact.touch();
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97 break;
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98 case STORE:
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99 artifact.store();
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100 break;
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101 case BACKGROUND:
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102 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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103 artifact.store();
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104 break;
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105 default:
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106 logger.error(INVALID_CALL_STATE + ": " + action);
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107 throw new IllegalStateException(INVALID_CALL_STATE);
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108 }
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109 }
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110
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111 public Object getContextValue(Object key) {
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112 return customValues != null
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113 ? customValues.get(key)
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114 : null;
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115 }
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116
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117 public Object putContextValue(Object key, Object value) {
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118 if (customValues == null) {
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119 customValues = new HashMap();
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120 }
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121 return customValues.put(key, value);
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122 }
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123 } // class CallContextImpl
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124
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125 public class DeferredOutputImpl
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126 implements DeferredOutput
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127 {
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128 protected PersistentArtifact artifact;
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129 protected Document format;
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130 protected CallMeta callMeta;
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131
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132 public DeferredOutputImpl() {
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133 }
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134
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135 public DeferredOutputImpl(
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136 PersistentArtifact artifact,
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137 Document format,
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138 CallMeta callMeta
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139 ) {
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140 this.artifact = artifact;
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141 this.format = format;
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142 this.callMeta = callMeta;
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143 }
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144
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145 public void write(OutputStream output) throws IOException {
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146
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147 CallContextImpl cc = new CallContextImpl(
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148 artifact, CallContext.TOUCH, callMeta);
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149
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150 try {
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151 artifact.getArtifact().out(format, output, cc);
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152 }
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153 finally {
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154 cc.postCall();
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155 }
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156 }
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157 } // class DeferredOutputImpl
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158
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159 protected String [][] factoryNamesAndDescription;
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160 protected HashMap name2factory;
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161
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162 protected Backend backend;
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163 protected Object context;
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164
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165 protected HashSet backgroundIds;
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166
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167 public ArtifactDatabaseImpl() {
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168 }
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169
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170 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap) {
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171 this(bootstrap, null);
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172 }
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173
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174 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap, Backend backend) {
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175
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176 backgroundIds = new HashSet();
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177 name2factory = new HashMap();
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178
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179 ArtifactFactory [] factories = bootstrap.getArtifactFactories();
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180 factoryNamesAndDescription = new String[factories.length][];
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181
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182 for (int i = 0; i < factories.length; ++i) {
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183
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184 ArtifactFactory factory = factories[i];
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185
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186 String name = factory.getName();
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187 String description = factory.getDescription();
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188
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189 factoryNamesAndDescription[i] =
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190 new String [] { name, description };
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191
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192 name2factory.put(name, factory);
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193 }
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194
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195 context = bootstrap.getContext();
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196
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197 wireWithBackend(backend);
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198 }
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199
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200 public void wireWithBackend(Backend backend) {
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201 if (backend != null) {
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202 this.backend = backend;
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203 backend.setFactoryLookup(this);
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204 }
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205 }
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206
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207 protected void fromBackground(PersistentArtifact artifact, int action) {
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208 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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209 switch (action) {
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210 case CallContext.NOTHING:
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211 break;
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212 case CallContext.TOUCH:
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213 artifact.touch();
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214 break;
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215 case CallContext.STORE:
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216 artifact.store();
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217 break;
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218 default:
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219 logger.warn("operation not allowed in fromBackground");
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220 }
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221 removeIdFromBackground(artifact.getId());
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222 }
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223
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224 protected void removeIdFromBackground(int id) {
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225 synchronized (backgroundIds) {
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226 backgroundIds.remove(Integer.valueOf(id));
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227 }
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228 }
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229
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230 protected void addIdToBackground(int id) {
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231 synchronized (backgroundIds) {
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232 backgroundIds.add(Integer.valueOf(id));
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233 }
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234 }
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235
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236 public List filterIds(List ids) {
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237 int N = ids.size();
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238 ArrayList out = new ArrayList(N);
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239 synchronized (backgroundIds) {
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240 for (int i = 0; i < N; ++i) {
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241 Id id = (Id)ids.get(i);
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242 if (!backgroundIds.contains(Integer.valueOf(id.getId()))) {
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243 out.add(id);
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244 }
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245 }
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246 }
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247 return out;
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248 }
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249
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250 public String [][] artifactFactoryNamesAndDescriptions() {
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251 return factoryNamesAndDescription;
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252 }
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253
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254 public ArtifactFactory getArtifactFactory(String factoryName) {
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255 return (ArtifactFactory)name2factory.get(factoryName);
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256 }
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257
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258 public Document createArtifactWithFactory(
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259 String factoryName,
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260 CallMeta callMeta
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261 )
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262 throws ArtifactDatabaseException
32
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263 {
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264 ArtifactFactory factory = getArtifactFactory(factoryName);
32
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265
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266 if (factory == null) {
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267 throw new ArtifactDatabaseException(NO_SUCH_FACTORY);
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268 }
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269
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270 Artifact artifact = factory.createArtifact(
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271 backend.newIdentifier(),
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272 context);
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273
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274 if (artifact == null) {
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275 throw new ArtifactDatabaseException(CREATION_FAILED);
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276 }
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277
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278 PersistentArtifact persistentArtifact;
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279
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280 try {
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281 persistentArtifact = backend.storeInitially(
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282 artifact,
41
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283 factory,
32
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284 factory.timeToLiveUntouched(artifact, context));
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285 }
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286 catch (Exception e) {
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287 logger.error(e.getLocalizedMessage(), e);
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288 throw new ArtifactDatabaseException(CREATION_FAILED);
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289 }
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290
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291 CallContextImpl cc = new CallContextImpl(
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292 persistentArtifact, CallContext.NOTHING, callMeta);
32
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293
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294 try {
55
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295 return artifact.describe(null, cc);
32
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296 }
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297 finally {
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298 cc.postCall();
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299 }
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300 }
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301
55
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302 public Document describe(String identifier, Document data, CallMeta callMeta)
32
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303 throws ArtifactDatabaseException
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304 {
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305 // TODO: Handle background tasks
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306 PersistentArtifact artifact = backend.getArtifact(identifier);
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307
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308 if (artifact == null) {
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309 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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310 }
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diff changeset
311
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312 CallContextImpl cc = new CallContextImpl(
48
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diff changeset
313 artifact, CallContext.TOUCH, callMeta);
32
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314
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315 try {
55
9a29899b31e5 describe() in REST interface is also handled as POST to pass
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316 return artifact.getArtifact().describe(data, cc);
32
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317 }
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318 finally {
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319 cc.postCall();
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320 }
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diff changeset
321 }
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diff changeset
322
48
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323 public Document advance(String identifier, Document target, CallMeta callMeta)
32
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324 throws ArtifactDatabaseException
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diff changeset
325 {
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326 // TODO: Handle background tasks
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diff changeset
327 PersistentArtifact artifact = backend.getArtifact(identifier);
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diff changeset
328
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diff changeset
329 if (artifact == null) {
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diff changeset
330 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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diff changeset
331 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
332
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
333 CallContextImpl cc = new CallContextImpl(
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
334 artifact, CallContext.STORE, callMeta);
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
335
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
336 try {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
337 return artifact.getArtifact().advance(target, cc);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
338 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
339 finally {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
340 cc.postCall();
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
341 }
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
342 }
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
343
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
344 public Document feed(String identifier, Document data, CallMeta callMeta)
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diff changeset
345 throws ArtifactDatabaseException
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
346 {
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diff changeset
347 // TODO: Handle background tasks
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
348 PersistentArtifact artifact = backend.getArtifact(identifier);
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diff changeset
349
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
350 if (artifact == null) {
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
351 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
352 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
353
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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diff changeset
354 CallContextImpl cc = new CallContextImpl(
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
355 artifact, CallContext.STORE, callMeta);
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
356
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
357 try {
36
f7d2cd59a0d5 Bugfix done. Now the feed Method works fine
Tim Englich <tim.englich@intevation.de>
parents: 32
diff changeset
358 return artifact.getArtifact().feed(data, cc);
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
359 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
360 finally {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
361 cc.postCall();
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
362 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
363 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
364
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
365 public DeferredOutput out(String identifier, Document format, CallMeta callMeta)
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
366 throws ArtifactDatabaseException
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
367 {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
368 // TODO: Handle background tasks
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
369 PersistentArtifact artifact = backend.getArtifact(identifier);
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
370
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
371 if (artifact == null) {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
372 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
373 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
374
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
375 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
376 }
0d6badf6af42 Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
377 }
0d6badf6af42 Added not yet working backend to artifact database.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents:
diff changeset
378 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org