Mercurial > dive4elements > framework
annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/BaseResource.java @ 402:b4ed641f01db
Tagged artifacts as '2.8.1'.
artifacts/trunk@5141 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author | Ingo Weinzierl <ingo.weinzierl@intevation.de> |
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date | Fri, 27 Jul 2012 06:21:40 +0000 |
parents | 320a81983c8d |
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1 /* |
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2 * Copyright (c) 2010 by Intevation GmbH |
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3 * |
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4 * This program is free software under the LGPL (>=v2.1) |
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5 * Read the file LGPL.txt coming with the software for details |
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6 * or visit http://www.gnu.org/licenses/ if it does not exist. |
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7 */ |
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8 |
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9 package de.intevation.artifactdatabase.rest; |
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10 |
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11 import de.intevation.artifactdatabase.DefaultCallMeta; |
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12 import de.intevation.artifactdatabase.DefaultPreferredLocale; |
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13 |
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14 import de.intevation.artifacts.ArtifactDatabase; |
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15 import de.intevation.artifacts.CallMeta; |
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16 import de.intevation.artifacts.PreferredLocale; |
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17 |
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18 import java.util.List; |
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19 |
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20 import org.apache.log4j.Logger; |
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21 |
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22 import org.restlet.data.ClientInfo; |
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23 import org.restlet.data.Language; |
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24 import org.restlet.data.Preference; |
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25 |
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26 import org.restlet.representation.Representation; |
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27 |
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28 import org.restlet.resource.ResourceException; |
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29 import org.restlet.resource.ServerResource; |
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30 |
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31 /** |
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32 * Base class for the resources of REST interface of the artifact database. |
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33 * Primarily used to unify the logging. |
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34 * @author <a href="mailto:sascha.teichmann@intevation">Sascha L. Teichmann</a> |
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35 */ |
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36 public class BaseResource |
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37 extends ServerResource |
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38 { |
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39 private static Logger logger = Logger.getLogger(BaseResource.class); |
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40 |
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41 /** |
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42 * Default constructor. |
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43 */ |
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44 public BaseResource() { |
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45 } |
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46 |
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47 /** |
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48 * Overrides the post method of ServerResource to handle some |
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49 * exceptions and to the required logging. |
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50 * The call bridges to #innerPost(Representation) which |
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51 * should be overwitten by the subclasses to do the real |
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52 * request processing. |
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53 * @param requestRepr The incoming represention of the HTTP request. |
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54 * @return The representation produced by #innerPost(Representation). |
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55 * @throws ResourceException Thrown if something went wrong during |
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56 * request processing. |
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57 */ |
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58 @Override |
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59 protected Representation post(Representation requestRepr) |
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60 throws ResourceException |
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61 { |
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62 try { |
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63 return innerPost(requestRepr); |
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64 } |
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65 catch (ResourceException re) { |
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66 throw re; |
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67 } |
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68 catch (RuntimeException re) { |
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69 logger.error(re.getLocalizedMessage(), re); |
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70 throw re; |
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71 } |
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72 } |
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73 |
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74 /** |
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75 * Trivial implementation of innerPost() which is called by |
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76 * #post(Representation) which simply calls super.post(Representation). |
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77 * This should be overwritten by subclasses which need POST support. |
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78 * @param requestRepr The incoming representation of the request. |
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79 * @return The representation produced by super.post(Representation). |
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80 * @throws ResourceException Thrown if something went wrong during |
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81 * request processing. |
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82 */ |
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83 protected Representation innerPost(Representation requestRepr) |
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84 throws ResourceException |
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85 { |
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86 return super.post(requestRepr); |
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87 } |
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88 |
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89 /** |
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90 * Wrapper around get() of the super class to handle some exceptions |
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91 * and do the corresponing logging. The call is bridged to #innerGet() |
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92 * which should be overwritten by subclasses. |
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93 * @return The representation produced by #innerGet() |
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94 * @throws ResourceException Thrown if something went wrong during |
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95 * request processing. |
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96 */ |
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97 @Override |
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98 protected Representation get() |
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99 throws ResourceException |
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100 { |
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101 try { |
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102 return innerGet(); |
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103 } |
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104 catch (ResourceException re) { |
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105 throw re; |
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106 } |
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107 catch (RuntimeException re) { |
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108 logger.error(re.getLocalizedMessage(), re); |
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109 throw re; |
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110 } |
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111 } |
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112 |
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113 /** |
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114 * Trivial implementaion of innerGet() which simply calls |
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115 * super.get() to produce some output representation. This method |
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116 * should be overwritten by subclasses which need GET support. |
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117 * @return The representation produced by super.get(). |
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118 * @throws ResourceException Thrown if something went wrong during |
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119 * request processing. |
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120 */ |
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121 protected Representation innerGet() |
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122 throws ResourceException |
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123 { |
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124 return super.get(); |
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125 } |
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126 |
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127 /** |
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128 * Returns meta information (preferred languages et. al.) |
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129 * of the current HTTP request. |
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130 * @return the meta information |
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131 */ |
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132 protected CallMeta getCallMeta() { |
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133 ClientInfo clientInfo = getClientInfo(); |
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134 |
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135 List<Preference<Language>> pl = clientInfo.getAcceptedLanguages(); |
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136 |
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137 PreferredLocale [] languages = new PreferredLocale[pl.size()]; |
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138 |
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139 int index = 0; |
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140 |
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141 for (Preference<Language> p: pl) { |
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142 String lang = p.getMetadata().getName(); |
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143 float quality = p.getQuality(); |
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144 languages[index++] = new DefaultPreferredLocale(lang, quality); |
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145 } |
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146 |
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147 return new DefaultCallMeta(languages); |
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148 } |
131
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149 |
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150 |
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151 /** |
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152 * Returns the artifact database stored in the context of the REST |
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153 * application. |
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154 * |
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155 * @return the artifact database. |
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156 */ |
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157 protected ArtifactDatabase getArtifactDatabase() { |
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158 return (ArtifactDatabase) getContext().getAttributes().get("database"); |
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159 } |
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160 } |
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161 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 : |