Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/ArtifactResource.java @ 29:22b03d5c84c5

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Added REST out handler for artifacts reachable via HTTP GET '/artifact/{uuid}/{type}'. artifacts/trunk@69 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Thu, 10 Sep 2009 15:49:17 +0000
parents 019b9f02d523
children c2d53bd30ab8
rev   line source
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75bdaf900473 Added REST handler for 'describe'.
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1 package de.intevation.artifactdatabase.rest;
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2
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3 import org.restlet.resource.Get;
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4 import org.restlet.resource.Post;
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5 import org.restlet.resource.ServerResource;
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6
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7 import org.restlet.representation.Representation;
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8 import org.restlet.representation.EmptyRepresentation;
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9
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10 import org.restlet.ext.xml.DomRepresentation;
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11
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12 import de.intevation.artifacts.ArtifactDatabase;
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13 import de.intevation.artifacts.Artifact;
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14 import de.intevation.artifacts.ArtifactNamespaceContext;
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15
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16 import org.restlet.data.Request;
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17 import org.restlet.data.Response;
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18 import org.restlet.data.Status;
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19 import org.restlet.data.MediaType;
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20
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21 import org.apache.log4j.Logger;
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22
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23 import org.w3c.dom.Document;
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24
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25 import java.io.IOException;
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26
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27 import de.intevation.artifactdatabase.XMLUtils;
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28
27
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29 /**
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30 * @author Sascha L. Teichmann (sascha.teichmann@intevation)
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31 */
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32 public class ArtifactResource
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33 extends ServerResource
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34 {
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35 private static Logger logger = Logger.getLogger(ArtifactResource.class);
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37 public static final String XPATH_ACTION = "/action/type/@name";
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38
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39 public static final String PATH = "/artifact/{uuid}";
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41 public static final String NO_ACTION_MESSAGE = "no action given";
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42 public static final String NO_SUCH_ACTION_MESSAGE = "no such action";
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43
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44 public static final String NO_ARTIFACT_FOUND = "Artifact not found";
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45
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46 public static final String ADVANCE = "advance";
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47 public static final String FEED = "feed";
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48
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49 @Get
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50 public Representation represent() {
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51
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52 Request request = getRequest();
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53
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54 String identifier = (String)request.getAttributes().get("uuid");
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55
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56 if (logger.isDebugEnabled()) {
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57 logger.debug("looking for artifact id '" + identifier + "'");
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58 }
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59
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60 ArtifactDatabase db = (ArtifactDatabase)getContext()
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61 .getAttributes().get("database");
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62
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63 Artifact artifact = db.getArtifact(identifier);
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64
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65 if (artifact == null) {
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66 Response response = getResponse();
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67 response.setStatus(Status.CLIENT_ERROR_NOT_FOUND, NO_ARTIFACT_FOUND);
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68 return new EmptyRepresentation();
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69 }
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70
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71 Document description = artifact.describe(db.getArtifactContext());
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72
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73 if (logger.isDebugEnabled()) {
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74 logger.debug("out document: " + description);
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75 }
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76
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77 return new DomRepresentation(
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78 MediaType.APPLICATION_XML, description);
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79 }
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80
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81 @Post
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82 public Representation representPost() {
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83 Request request = getRequest();
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84
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85 Representation requestRepr = request.getEntity();
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86
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87 Document inputDocument = null;
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88 try {
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89 DomRepresentation input = new DomRepresentation(requestRepr);
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90 inputDocument = input.getDocument();
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91 }
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92 catch (IOException ioe) {
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93 logger.error(ioe.getMessage());
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94 Response response = getResponse();
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95 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe);
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96 return new EmptyRepresentation();
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97 }
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98
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99 String action = XMLUtils.xpathString(
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100 inputDocument,
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101 XPATH_ACTION,
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102 ArtifactNamespaceContext.INSTANCE);
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103
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104 if (action == null || action.length() == 0) {
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105 Response response = getResponse();
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106 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, NO_ACTION_MESSAGE);
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107 return new EmptyRepresentation();
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108 }
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109
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110 int actionType = -1;
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111
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112 if (FEED .equals(action)) actionType = 0;
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113 else if (ADVANCE.equals(action)) actionType = 1;
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114 else {
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115 Response response = getResponse();
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116 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, NO_SUCH_ACTION_MESSAGE);
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117 return new EmptyRepresentation();
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118 }
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119
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120 String identifier = (String)request.getAttributes().get("uuid");
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121
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122 if (logger.isDebugEnabled()) {
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123 logger.debug("looking for artifact id '" + identifier + "'");
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124 }
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125
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126 ArtifactDatabase db = (ArtifactDatabase)getContext()
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127 .getAttributes().get("database");
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128
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129 Artifact artifact = db.getArtifact(identifier);
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130
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131 if (artifact == null) {
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132 Response response = getResponse();
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133 response.setStatus(Status.CLIENT_ERROR_NOT_FOUND, NO_ARTIFACT_FOUND);
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134 return new EmptyRepresentation();
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135 }
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136
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137 Document document = null;
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138
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139 switch (actionType) {
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140 case 0:
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141 document = artifact.feed(inputDocument, db.getArtifactContext());
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142 break;
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143 case 1:
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144 document = artifact.advance(inputDocument, db.getArtifactContext());
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145 break;
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146 default:
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147 // should not happen
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148 return new EmptyRepresentation();
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149 }
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150
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151 return new DomRepresentation(MediaType.APPLICATION_XML, document);
27
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152 }
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153 }
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154 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org