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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/ArtifactDatabaseImpl.java @ 70:ce488c1d3fc4

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Serve services over artifact database. artifacts/trunk@597 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 22 Jan 2010 11:08:40 +0000
parents 541814404822
children d4c4c23847f5
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 de.intevation.artifactdatabase.Backend.PersistentArtifact;
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4
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5 import de.intevation.artifacts.Artifact;
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6 import de.intevation.artifacts.ArtifactDatabase;
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7 import de.intevation.artifacts.ArtifactDatabaseException;
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8 import de.intevation.artifacts.ArtifactFactory;
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9 import de.intevation.artifacts.CallContext;
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10 import de.intevation.artifacts.CallMeta;
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11 import de.intevation.artifacts.Service;
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12 import de.intevation.artifacts.ServiceFactory;
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13
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14 import java.io.IOException;
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15 import java.io.OutputStream;
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16
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17 import java.util.ArrayList;
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18 import java.util.HashMap;
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19 import java.util.HashSet;
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20 import java.util.List;
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22 import org.apache.log4j.Logger;
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23
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24 import org.w3c.dom.Document;
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25
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26 /**
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27 * @author Sascha L. Teichmann
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28 */
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29 public class ArtifactDatabaseImpl
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30 implements ArtifactDatabase, Id.Filter, Backend.FactoryLookup
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31 {
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32 private static Logger logger =
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33 Logger.getLogger(ArtifactDatabaseImpl.class);
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35 public static final String NO_SUCH_FACTORY =
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36 "No such factory";
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37
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38 public static final String NO_SUCH_ARTIFACT =
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39 "No such artifact";
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40
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41 public static final String NOT_IN_BACKGROUND =
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42 "Not in background";
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43
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44 public static final String INVALID_CALL_STATE =
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45 "Invalid after call state";
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46
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47 public static final String CREATION_FAILED =
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48 "Creation of artifact failed";
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49
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50 public static final String INTERNAL_ERROR =
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51 "Creation of artifact failed";
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52
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53 public static final String NO_SUCH_SERVICE =
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54 "No such service";
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55
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56 public class CallContextImpl
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57 implements CallContext
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58 {
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59 protected PersistentArtifact artifact;
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60 protected int action;
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61 protected CallMeta callMeta;
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62 protected HashMap customValues;
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63
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64 public CallContextImpl(
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65 PersistentArtifact artifact,
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66 int action,
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67 CallMeta callMeta
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68 ) {
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69 this.artifact = artifact;
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70 this.action = action;
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71 this.callMeta = callMeta;
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72 }
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73
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74 public void afterCall(int action) {
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75 this.action = action;
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76 if (action == BACKGROUND) {
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77 addIdToBackground(artifact.getId());
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78 }
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79 }
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80
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81 public void afterBackground(int action) {
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82 if (this.action != BACKGROUND) {
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83 throw new IllegalStateException(NOT_IN_BACKGROUND);
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84 }
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85 fromBackground(artifact, action);
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86 }
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87
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88 public Object globalContext() {
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89 return context;
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90 }
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91
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92 public ArtifactDatabase getDatabase() {
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93 return ArtifactDatabaseImpl.this;
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94 }
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95
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96 public CallMeta getMeta() {
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97 return callMeta;
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98 }
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99
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100 public void postCall() {
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101 switch (action) {
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102 case NOTHING:
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103 break;
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104 case TOUCH:
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105 artifact.touch();
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106 break;
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107 case STORE:
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108 artifact.store();
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109 break;
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110 case BACKGROUND:
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111 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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112 artifact.store();
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113 break;
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114 default:
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115 logger.error(INVALID_CALL_STATE + ": " + action);
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116 throw new IllegalStateException(INVALID_CALL_STATE);
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117 }
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118 }
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119
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120 public Object getContextValue(Object key) {
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121 return customValues != null
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122 ? customValues.get(key)
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123 : null;
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124 }
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125
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126 public Object putContextValue(Object key, Object value) {
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127 if (customValues == null) {
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128 customValues = new HashMap();
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129 }
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130 return customValues.put(key, value);
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131 }
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132 } // class CallContextImpl
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133
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134 public class DeferredOutputImpl
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135 implements DeferredOutput
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136 {
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137 protected PersistentArtifact artifact;
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138 protected Document format;
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139 protected CallMeta callMeta;
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140
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141 public DeferredOutputImpl() {
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142 }
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143
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144 public DeferredOutputImpl(
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145 PersistentArtifact artifact,
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146 Document format,
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147 CallMeta callMeta
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148 ) {
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149 this.artifact = artifact;
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150 this.format = format;
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151 this.callMeta = callMeta;
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152 }
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153
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154 public void write(OutputStream output) throws IOException {
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155
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156 CallContextImpl cc = new CallContextImpl(
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157 artifact, CallContext.TOUCH, callMeta);
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158
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159 try {
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160 artifact.getArtifact().out(format, output, cc);
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161 }
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162 finally {
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163 cc.postCall();
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164 }
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165 }
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166 } // class DeferredOutputImpl
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167
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168 protected String [][] factoryNamesAndDescription;
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169 protected HashMap name2factory;
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170
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171 protected String [][] serviceNamesAndDescription;
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172 protected HashMap name2service;
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173
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174 protected Backend backend;
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175 protected Object context;
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176
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177 protected HashSet backgroundIds;
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178
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179 public ArtifactDatabaseImpl() {
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180 }
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181
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182 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap) {
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183 this(bootstrap, null);
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184 }
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185
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186 public ArtifactDatabaseImpl(FactoryBootstrap bootstrap, Backend backend) {
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187
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188 backgroundIds = new HashSet();
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189
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190 setupArtifactFactories(bootstrap);
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191 setupServices(bootstrap);
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192
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193 context = bootstrap.getContext();
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194
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195 wireWithBackend(backend);
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196 }
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197
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198 protected void setupArtifactFactories(FactoryBootstrap bootstrap) {
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199 name2factory = new HashMap();
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200
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201 ArtifactFactory [] factories = bootstrap.getArtifactFactories();
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202 factoryNamesAndDescription = new String[factories.length][];
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203
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204 for (int i = 0; i < factories.length; ++i) {
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205
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206 ArtifactFactory factory = factories[i];
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207
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208 String name = factory.getName();
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209 String description = factory.getDescription();
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210
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211 factoryNamesAndDescription[i] =
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212 new String [] { name, description };
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213
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214 name2factory.put(name, factory);
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215 }
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216 }
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217
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218 protected void setupServices(FactoryBootstrap bootstrap) {
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219
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220 name2service = new HashMap();
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221
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222 ServiceFactory [] serviceFactories =
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223 bootstrap.getServiceFactories();
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224
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225 serviceNamesAndDescription =
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226 new String[serviceFactories.length][];
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227
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228 for (int i = 0; i < serviceFactories.length; ++i) {
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229 ServiceFactory factory = serviceFactories[i];
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230
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231 String name = factory.getName();
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232 String description = factory.getDescription();
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233
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234 serviceNamesAndDescription[i] =
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235 new String [] { name, description };
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236
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237 name2service.put(
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238 name,
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239 factory.createService(bootstrap.getContext()));
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240 }
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241
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242 }
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243
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244 public void wireWithBackend(Backend backend) {
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245 if (backend != null) {
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246 this.backend = backend;
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247 backend.setFactoryLookup(this);
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248 }
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249 }
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250
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251 protected void fromBackground(PersistentArtifact artifact, int action) {
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252 logger.warn("BACKGROUND processing is not fully implemented, yet!");
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253 switch (action) {
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254 case CallContext.NOTHING:
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255 break;
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diff changeset
256 case CallContext.TOUCH:
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diff changeset
257 artifact.touch();
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diff changeset
258 break;
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259 case CallContext.STORE:
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diff changeset
260 artifact.store();
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diff changeset
261 break;
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diff changeset
262 default:
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263 logger.warn("operation not allowed in fromBackground");
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264 }
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diff changeset
265 removeIdFromBackground(artifact.getId());
13
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parents:
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266 }
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267
32
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268 protected void removeIdFromBackground(int id) {
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diff changeset
269 synchronized (backgroundIds) {
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270 backgroundIds.remove(Integer.valueOf(id));
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271 }
13
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parents:
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272 }
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273
32
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274 protected void addIdToBackground(int id) {
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275 synchronized (backgroundIds) {
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diff changeset
276 backgroundIds.add(Integer.valueOf(id));
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277 }
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278 }
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279
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280 public List filterIds(List ids) {
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281 int N = ids.size();
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282 ArrayList out = new ArrayList(N);
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283 synchronized (backgroundIds) {
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284 for (int i = 0; i < N; ++i) {
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diff changeset
285 Id id = (Id)ids.get(i);
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diff changeset
286 if (!backgroundIds.contains(Integer.valueOf(id.getId()))) {
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diff changeset
287 out.add(id);
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diff changeset
288 }
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diff changeset
289 }
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290 }
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diff changeset
291 return out;
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diff changeset
292 }
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diff changeset
293
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diff changeset
294 public String [][] artifactFactoryNamesAndDescriptions() {
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295 return factoryNamesAndDescription;
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diff changeset
296 }
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parents: 26
diff changeset
297
66
89e3de0ee05f Implemented some methods to get access to ArtifactFactories which are stored in the ArtifactDatabase.
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parents: 58
diff changeset
298 public ArtifactFactory getInternalArtifactFactory(String factoryName) {
89e3de0ee05f Implemented some methods to get access to ArtifactFactories which are stored in the ArtifactDatabase.
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parents: 58
diff changeset
299 return getArtifactFactory(factoryName);
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Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 58
diff changeset
300 }
89e3de0ee05f Implemented some methods to get access to ArtifactFactories which are stored in the ArtifactDatabase.
Ingo Weinzierl <ingo.weinzierl@intevation.de>
parents: 58
diff changeset
301
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
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diff changeset
302 public ArtifactFactory getArtifactFactory(String factoryName) {
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diff changeset
303 return (ArtifactFactory)name2factory.get(factoryName);
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diff changeset
304 }
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parents: 36
diff changeset
305
48
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diff changeset
306 public Document createArtifactWithFactory(
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diff changeset
307 String factoryName,
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parents: 47
diff changeset
308 CallMeta callMeta
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
309 )
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diff changeset
310 throws ArtifactDatabaseException
32
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parents: 26
diff changeset
311 {
41
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diff changeset
312 ArtifactFactory factory = getArtifactFactory(factoryName);
32
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diff changeset
313
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diff changeset
314 if (factory == null) {
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diff changeset
315 throw new ArtifactDatabaseException(NO_SUCH_FACTORY);
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parents: 26
diff changeset
316 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
317
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
318 Artifact artifact = factory.createArtifact(
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diff changeset
319 backend.newIdentifier(),
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diff changeset
320 context);
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diff changeset
321
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
322 if (artifact == null) {
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parents: 26
diff changeset
323 throw new ArtifactDatabaseException(CREATION_FAILED);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
324 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
325
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
326 PersistentArtifact persistentArtifact;
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
327
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
328 try {
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diff changeset
329 persistentArtifact = backend.storeInitially(
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
330 artifact,
41
5e4bc24ea438 Made serilization more flexible. DB update required!!!
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 36
diff changeset
331 factory,
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
332 factory.timeToLiveUntouched(artifact, context));
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
333 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
334 catch (Exception e) {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
335 logger.error(e.getLocalizedMessage(), e);
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
336 throw new ArtifactDatabaseException(CREATION_FAILED);
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
337 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
338
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
339 CallContextImpl cc = new CallContextImpl(
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
340 persistentArtifact, CallContext.NOTHING, callMeta);
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
341
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
342 try {
55
9a29899b31e5 describe() in REST interface is also handled as POST to pass
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 48
diff changeset
343 return artifact.describe(null, cc);
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
344 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
345 finally {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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parents: 26
diff changeset
346 cc.postCall();
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
347 }
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
348 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
349
55
9a29899b31e5 describe() in REST interface is also handled as POST to pass
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parents: 48
diff changeset
350 public Document describe(String identifier, Document data, CallMeta callMeta)
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
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diff changeset
351 throws ArtifactDatabaseException
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
352 {
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
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diff changeset
353 // TODO: Handle background tasks
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parents: 26
diff changeset
354 PersistentArtifact artifact = backend.getArtifact(identifier);
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Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
355
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
356 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
357 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
358 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
359
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
360 CallContextImpl cc = new CallContextImpl(
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 47
diff changeset
361 artifact, CallContext.TOUCH, callMeta);
32
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
362
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
363 try {
55
9a29899b31e5 describe() in REST interface is also handled as POST to pass
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 48
diff changeset
364 return artifact.getArtifact().describe(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
365 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
366 finally {
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
367 cc.postCall();
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
368 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
369 }
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
370
48
41c225c8bd41 Add i18n support via "Accept-Language" HTTP headers.
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parents: 47
diff changeset
371 public Document advance(String identifier, Document target, 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
372 throws ArtifactDatabaseException
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 // TODO: Handle background tasks
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
375 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
376
c2d53bd30ab8 Re-factored artifact API for better integration of background processing.
Sascha L. Teichmann <sascha.teichmann@intevation.de>
parents: 26
diff changeset
377 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
378 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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379 }
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380
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381 CallContextImpl cc = new CallContextImpl(
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382 artifact, CallContext.STORE, callMeta);
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383
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384 try {
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385 return artifact.getArtifact().advance(target, cc);
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386 }
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387 finally {
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388 cc.postCall();
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389 }
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390 }
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391
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392 public Document feed(String identifier, Document data, CallMeta callMeta)
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393 throws ArtifactDatabaseException
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394 {
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395 // TODO: Handle background tasks
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396 PersistentArtifact artifact = backend.getArtifact(identifier);
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397
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398 if (artifact == null) {
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399 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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400 }
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401
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402 CallContextImpl cc = new CallContextImpl(
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403 artifact, CallContext.STORE, callMeta);
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404
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405 try {
36
f7d2cd59a0d5 Bugfix done. Now the feed Method works fine
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406 return artifact.getArtifact().feed(data, cc);
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407 }
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408 finally {
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409 cc.postCall();
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410 }
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411 }
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412
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413 public DeferredOutput out(String identifier, Document format, CallMeta callMeta)
32
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414 throws ArtifactDatabaseException
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415 {
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416 // TODO: Handle background tasks
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417 PersistentArtifact artifact = backend.getArtifact(identifier);
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418
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419 if (artifact == null) {
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420 throw new ArtifactDatabaseException(NO_SUCH_ARTIFACT);
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421 }
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422
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423 return new DeferredOutputImpl(artifact, format, callMeta);
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424 }
68
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425
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426 public String [][] serviceNamesAndDescriptions() {
70
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427 return serviceNamesAndDescription;
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428 }
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429
70
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430 public Document process(
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431 String serviceName,
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432 Document input,
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433 CallMeta callMeta
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434 )
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435 throws ArtifactDatabaseException
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436 {
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437 Service service = (Service)name2service.get(serviceName);
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438
ce488c1d3fc4 Serve services over artifact database.
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439 if (service == null) {
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440 throw new ArtifactDatabaseException(NO_SUCH_SERVICE);
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441 }
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442
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443 return service.process(input, context, callMeta);
68
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444 }
13
0d6badf6af42 Added not yet working backend to artifact database.
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parents:
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445 }
0d6badf6af42 Added not yet working backend to artifact database.
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446 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org