Mercurial > dive4elements > framework

annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/BaseResource.java @ 93:e27cf9c84eb8

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Unified imports. artifacts/trunk@849 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Sun, 28 Mar 2010 15:57:40 +0000
parents 69c84cf7c5d7
children 5332d956729c
rev   line source
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1 package de.intevation.artifactdatabase.rest;
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2
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3 import de.intevation.artifactdatabase.DefaultCallMeta;
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4 import de.intevation.artifactdatabase.DefaultPreferredLocale;
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5
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6 import de.intevation.artifacts.CallMeta;
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7 import de.intevation.artifacts.PreferredLocale;
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8
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9 import java.util.Iterator;
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10 import java.util.List;
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12 import org.apache.log4j.Logger;
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14 import org.restlet.data.ClientInfo;
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15 import org.restlet.data.Language;
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16 import org.restlet.data.Preference;
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18 import org.restlet.representation.Representation;
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20 import org.restlet.resource.ResourceException;
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21 import org.restlet.resource.ServerResource;
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23 /**
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24 * Base class for the resources of REST interface of the artifact database.
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25 * Primarily used to unify the logging.
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26 * @author <a href="mailto:sascha.teichmann@intevation">Sascha L. Teichmann</a>
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27 */
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28 public class BaseResource
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29 extends ServerResource
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30 {
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31 private static Logger logger = Logger.getLogger(BaseResource.class);
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33 /**
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34 * Default constructor.
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35 */
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36 public BaseResource() {
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37 }
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39 /**
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40 * Overrides the post method of ServerResource to handle some
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41 * exceptions and to the required logging.
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42 * The call bridges to #innerPost(Representation) which
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43 * should be overwitten by the subclasses to do the real
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44 * request processing.
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45 * @param requestRepr The incoming represention of the HTTP request.
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46 * @return The representation produced by #innerPost(Representation).
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47 * @throws ResourceException Thrown if something went wrong during
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48 * request processing.
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49 */
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50 @Override
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51 protected Representation post(Representation requestRepr)
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52 throws ResourceException
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53 {
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54 try {
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55 return innerPost(requestRepr);
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56 }
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57 catch (ResourceException re) {
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58 throw re;
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59 }
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60 catch (RuntimeException re) {
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61 logger.error(re.getLocalizedMessage(), re);
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62 throw re;
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63 }
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64 }
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66 /**
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67 * Trivial implementation of innerPost() which is called by
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68 * #post(Representation) which simply calls super.post(Representation).
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69 * This should be overwritten by subclasses which need POST support.
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70 * @param requestRepr The incoming representation of the request.
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71 * @return The representation produced by super.post(Representation).
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72 * @throws ResourceException Thrown if something went wrong during
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73 * request processing.
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74 */
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75 protected Representation innerPost(Representation requestRepr)
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76 throws ResourceException
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77 {
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78 return super.post(requestRepr);
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79 }
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81 /**
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82 * Wrapper around get() of the super class to handle some exceptions
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83 * and do the corresponing logging. The call is bridged to #innerGet()
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84 * which should be overwritten by subclasses.
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85 * @return The representation produced by #innerGet()
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86 * @throws ResourceException Thrown if something went wrong during
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87 * request processing.
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88 */
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89 @Override
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90 protected Representation get()
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91 throws ResourceException
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92 {
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93 try {
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94 return innerGet();
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95 }
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96 catch (ResourceException re) {
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97 throw re;
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98 }
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99 catch (RuntimeException re) {
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100 logger.error(re.getLocalizedMessage(), re);
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101 throw re;
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102 }
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103 }
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104
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105 /**
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106 * Trivial implementaion of innerGet() which simply calls
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107 * super.get() to produce some output representation. This method
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108 * should be overwritten by subclasses which need GET support.
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109 * @return The representation produced by super.get().
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110 * @throws ResourceException Thrown if something went wrong during
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111 * request processing.
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112 */
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113 protected Representation innerGet()
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114 throws ResourceException
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115 {
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116 return super.get();
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117 }
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118
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119 /**
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120 * Returns meta information (preferred languages et. al.)
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121 * of the current HTTP request.
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122 * @return the meta information
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123 */
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124 protected CallMeta getCallMeta() {
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125 ClientInfo clientInfo = getClientInfo();
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126
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127 List<Preference<Language>> pl = clientInfo.getAcceptedLanguages();
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128
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129 PreferredLocale [] languages = new PreferredLocale[pl.size()];
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130
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131 int index = 0;
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132
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133 for (Iterator<Preference<Language>> iter = pl.iterator(); iter.hasNext();) {
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134 Preference p = iter.next();
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135 String lang = p.getMetadata().getName();
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136 float quality = p.getQuality();
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137 languages[index++] = new DefaultPreferredLocale(lang, quality);
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138 }
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139
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140 return new DefaultCallMeta(languages);
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141 }
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142 }
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143 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org