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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/ArtifactResource.java @ 32:c2d53bd30ab8

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Re-factored artifact API for better integration of background processing. artifacts/trunk@78 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 13 Sep 2009 14:50:53 +0000
parents 22b03d5c84c5
children 9935e1c928de
rev   line source
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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.ArtifactDatabaseException;
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14 import de.intevation.artifacts.Artifact;
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15 import de.intevation.artifacts.ArtifactNamespaceContext;
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16
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17 import org.restlet.data.Request;
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18 import org.restlet.data.Response;
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19 import org.restlet.data.Status;
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20 import org.restlet.data.MediaType;
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21
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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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26 import java.io.IOException;
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28 import de.intevation.artifactdatabase.XMLUtils;
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29
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30 /**
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31 * @author Sascha L. Teichmann (sascha.teichmann@intevation)
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32 */
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33 public class ArtifactResource
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34 extends ServerResource
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35 {
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36 private static Logger logger = Logger.getLogger(ArtifactResource.class);
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38 public static final String XPATH_ACTION = "/action/type/@name";
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39
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40 public static final String PATH = "/artifact/{uuid}";
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41
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42 public static final String NO_ACTION_MESSAGE = "no action given";
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43 public static final String NO_SUCH_ACTION_MESSAGE = "no such action";
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44
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45 public static final String NO_ARTIFACT_FOUND = "Artifact not found";
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47 public static final String ADVANCE = "advance";
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48 public static final String FEED = "feed";
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49
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50 @Get
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51 public Representation represent() {
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52
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53 Request request = getRequest();
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54
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55 String identifier = (String)request.getAttributes().get("uuid");
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56
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57 if (logger.isDebugEnabled()) {
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58 logger.debug("looking for artifact id '" + identifier + "'");
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59 }
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60
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61 ArtifactDatabase db = (ArtifactDatabase)getContext()
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62 .getAttributes().get("database");
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63
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64 try {
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65 return new DomRepresentation(
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66 MediaType.APPLICATION_XML,
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67 db.describe(identifier));
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68 }
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69 catch (ArtifactDatabaseException adbe) {
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70 Response response = getResponse();
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71 response.setStatus(
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72 Status.CLIENT_ERROR_NOT_FOUND, adbe.getMessage());
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73 return new EmptyRepresentation();
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74 }
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75 }
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76
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77 protected Representation dispatch(
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78 String identifier,
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79 String action,
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80 Document source,
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81 ArtifactDatabase db
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82 ) {
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83 Document out = null;
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84
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85 try {
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86 if (action.equals(FEED)) {
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87 out = db.feed(identifier, source);
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88 }
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89 else if (action.equals(ADVANCE)) {
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90 out = db.advance(identifier, source);
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91 }
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92 else {
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93 throw new ArtifactDatabaseException(NO_SUCH_ACTION_MESSAGE);
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94 }
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95 }
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96 catch (ArtifactDatabaseException adbe) {
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97 Response response = getResponse();
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98 response.setStatus(
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99 Status.CLIENT_ERROR_BAD_REQUEST, adbe.getMessage());
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100 return new EmptyRepresentation();
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101 }
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102
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103 return new DomRepresentation(MediaType.APPLICATION_XML, out);
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104 }
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105
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106 @Post
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107 public Representation representPost() {
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108 Request request = getRequest();
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109
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110 Representation requestRepr = request.getEntity();
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111
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112 Document inputDocument = null;
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113 try {
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114 DomRepresentation input = new DomRepresentation(requestRepr);
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115 inputDocument = input.getDocument();
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116 }
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117 catch (IOException ioe) {
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118 logger.error(ioe.getMessage());
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119 Response response = getResponse();
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120 response.setStatus(Status.CLIENT_ERROR_BAD_REQUEST, ioe);
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121 return new EmptyRepresentation();
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122 }
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123
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124 String action = XMLUtils.xpathString(
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125 inputDocument,
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126 XPATH_ACTION,
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127 ArtifactNamespaceContext.INSTANCE);
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128
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129 if (action == null || action.length() == 0) {
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130 Response response = getResponse();
32
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131 response.setStatus(
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132 Status.CLIENT_ERROR_BAD_REQUEST, NO_ACTION_MESSAGE);
28
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133 return new EmptyRepresentation();
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134 }
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135
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136 String identifier = (String)request.getAttributes().get("uuid");
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137
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138 ArtifactDatabase db = (ArtifactDatabase)getContext()
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139 .getAttributes().get("database");
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140
32
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141 return dispatch(identifier, action, inputDocument, db);
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142 }
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143 }
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144 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8:
http://dive4elements.wald.intevation.org