1 | package de.mpiwg.itgroup.annotations.restlet; |
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2 | |
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3 | import java.io.File; |
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4 | import java.io.FileInputStream; |
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5 | import java.io.FileNotFoundException; |
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6 | import java.io.IOException; |
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7 | import java.io.InputStream; |
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8 | import java.util.Hashtable; |
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9 | import java.util.Properties; |
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10 | |
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11 | import javax.naming.NamingEnumeration; |
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12 | import javax.naming.NamingException; |
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13 | import javax.naming.directory.Attribute; |
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14 | import javax.naming.directory.DirContext; |
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15 | import javax.naming.directory.InitialDirContext; |
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16 | import javax.naming.directory.SearchControls; |
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17 | import javax.naming.directory.SearchResult; |
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18 | import javax.servlet.ServletContext; |
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19 | |
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20 | import org.apache.log4j.BasicConfigurator; |
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21 | import org.apache.log4j.Logger; |
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22 | import org.neo4j.graphdb.GraphDatabaseService; |
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23 | import org.neo4j.graphdb.factory.GraphDatabaseBuilder; |
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24 | import org.neo4j.graphdb.factory.GraphDatabaseFactory; |
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25 | import org.neo4j.graphdb.factory.GraphDatabaseSettings; |
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26 | import org.neo4j.kernel.AbstractGraphDatabase; |
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27 | import org.neo4j.kernel.GraphDatabaseAPI; |
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28 | import org.neo4j.server.WrappingNeoServerBootstrapper; |
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29 | import org.restlet.Application; |
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30 | import org.restlet.Context; |
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31 | |
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32 | import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore; |
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33 | |
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34 | public abstract class BaseRestlet extends Application { |
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35 | |
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36 | public static Logger logger = Logger.getLogger(BaseRestlet.class); |
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37 | |
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38 | /** |
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39 | * Properties holding consumer keys and secrets. |
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40 | */ |
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41 | protected Properties consumerKeys; |
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42 | public String CONSUMER_KEYS_PATH = "WEB-INF/consumerkeys.property"; |
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43 | public static final String CONSUMERKEYS_KEY = "annotationmanager.consumerkeys"; |
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44 | |
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45 | /** |
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46 | * Properties holding server config. |
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47 | */ |
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48 | protected Properties serverConfig; |
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49 | public String CONFIG_PROPS_PATH = "WEB-INF/serverconfig.property"; |
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50 | public static final String SERVERCONFIG_KEY = "annotationmanager.serverconfig"; |
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51 | |
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52 | /** |
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53 | * database instance; |
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54 | */ |
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55 | protected GraphDatabaseService graphDb; |
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56 | public static final String GRAPHDB_KEY = "annotationmanager.graphdb"; |
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57 | public static final String GRAPHDB_PATH_KEY = "annotationmanager.graphdb.path"; |
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58 | public String graphdbPath = "WEB-INF/neo4j-annotation-db"; |
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59 | |
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60 | /** |
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61 | * database interface server instance. |
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62 | */ |
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63 | protected WrappingNeoServerBootstrapper srv; |
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64 | public static final String GRAPHDBSRV_KEY = "annotationmanager.graphdb.srv"; |
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65 | |
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66 | /** |
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67 | * annotation store instance. |
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68 | */ |
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69 | protected AnnotationStore store; |
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70 | public static final String ANNSTORE_KEY = "annotationmanager.store"; |
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71 | |
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72 | /** |
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73 | * LDAP server URI (for looking up full user names). |
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74 | */ |
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75 | protected String ldapServerUrl; |
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76 | public static final String LDAP_SERVER_KEY = "annotationmanager.ldapserver.url"; |
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77 | |
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78 | public static final String ADMIN_USER_KEY = "annotationmanager.admin.user"; |
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79 | public static final String ADMIN_PASSWORD_KEY = "annotationmanager.admin.password"; |
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80 | |
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81 | /** |
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82 | * run in authorization mode i.e. with tokens. |
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83 | */ |
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84 | protected boolean authorizationMode = false; |
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85 | public static final String AUTHORIZATION_MODE_KEY = "annotationmanager.authorization"; |
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86 | |
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87 | /** |
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88 | * prefix to create uris for tags in store. |
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89 | */ |
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90 | public static String TAGS_URI_PREFIX = ""; |
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91 | public static final String TAGS_URI_KEY = "annotationmanager.uris.tags"; |
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92 | |
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93 | /** |
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94 | * prefix to create uris for persons in store. |
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95 | */ |
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96 | public static String PERSONS_URI_PREFIX = ""; |
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97 | public static final String PERSONS_URI_KEY = "annotationmanager.uris.persons"; |
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98 | |
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99 | /** |
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100 | * prefix to create uris for groups in store. |
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101 | */ |
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102 | public static String GROUPS_URI_PREFIX = ""; |
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103 | public static final String GROUPS_URI_KEY = "annotationmanager.uris.groups"; |
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104 | |
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105 | public static final String ANNOTATIONS_URI_KEY = "annotationmanager.uris.annotations"; |
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106 | |
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107 | /** |
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108 | * constructor |
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109 | * |
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110 | * @param context |
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111 | */ |
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112 | public BaseRestlet(Context context) { |
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113 | super(context); |
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114 | configure(); |
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115 | } |
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116 | |
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117 | /** |
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118 | * Configures the restlet. |
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119 | * Reads serverConfig, consumerKeys and graphDb config from config files and starts graphDb. |
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120 | * Uses config from webapp context if already initialized. |
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121 | */ |
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122 | protected void configure() { |
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123 | ServletContext sc = (ServletContext) getContext().getServerDispatcher().getContext().getAttributes() |
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124 | .get("org.restlet.ext.servlet.ServletContext"); |
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125 | if (sc != null) { |
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126 | if (sc.getAttribute("annotationserver.log4j.configured") == null) { |
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127 | // TODO: is this the right place to run the log4j configurator? |
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128 | BasicConfigurator.configure(); |
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129 | sc.setAttribute("annotationserver.log4j.configured", "done"); |
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130 | } |
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131 | logger.info(getVersion() + " starting..."); |
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132 | |
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133 | /* |
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134 | * read config from webapp |
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135 | */ |
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136 | serverConfig = (Properties) sc.getAttribute(SERVERCONFIG_KEY); |
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137 | if (serverConfig == null) { |
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138 | serverConfig = new Properties(); |
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139 | InputStream ps = getResourceAsStream(sc, CONFIG_PROPS_PATH); |
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140 | if (ps != null) { |
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141 | logger.debug("loading config from " + CONFIG_PROPS_PATH); |
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142 | try { |
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143 | serverConfig.load(ps); |
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144 | /* |
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145 | * read serverconfig options |
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146 | */ |
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147 | graphdbPath = serverConfig.getProperty(GRAPHDB_PATH_KEY, graphdbPath); |
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148 | ldapServerUrl = serverConfig.getProperty(LDAP_SERVER_KEY, null); |
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149 | /* |
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150 | * uri prefixes |
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151 | */ |
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152 | if (serverConfig.containsKey(PERSONS_URI_KEY)) { |
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153 | BaseRestlet.PERSONS_URI_PREFIX = serverConfig.getProperty(PERSONS_URI_KEY); |
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154 | } |
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155 | if (serverConfig.containsKey(GROUPS_URI_KEY)) { |
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156 | BaseRestlet.GROUPS_URI_PREFIX = serverConfig.getProperty(GROUPS_URI_KEY); |
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157 | } |
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158 | if (serverConfig.containsKey(TAGS_URI_KEY)) { |
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159 | BaseRestlet.TAGS_URI_PREFIX = serverConfig.getProperty(TAGS_URI_KEY); |
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160 | } |
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161 | if (serverConfig.containsKey(ANNOTATIONS_URI_KEY)) { |
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162 | AnnotationStore.ANNOTATION_URI_PREFIX = serverConfig.getProperty(ANNOTATIONS_URI_KEY); |
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163 | } |
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164 | } catch (IOException e) { |
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165 | logger.warn("Error loading server config: ", e); |
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166 | } |
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167 | logger.debug("config: " + serverConfig); |
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168 | } else { |
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169 | logger.error("Unable to get resource " + CONFIG_PROPS_PATH); |
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170 | } |
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171 | // store config |
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172 | sc.setAttribute(SERVERCONFIG_KEY, serverConfig); |
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173 | } |
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174 | // look for database service in context |
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175 | graphDb = (GraphDatabaseService) sc.getAttribute(GRAPHDB_KEY); |
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176 | if (graphDb == null) { |
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177 | /* |
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178 | * open database |
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179 | */ |
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180 | String dbFn = getResourcePath(sc, graphdbPath); |
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181 | if (dbFn != null) { |
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182 | logger.debug("opening DB " + dbFn); |
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183 | GraphDatabaseBuilder graphDbBuilder = new GraphDatabaseFactory().newEmbeddedDatabaseBuilder(dbFn); |
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184 | graphDbBuilder.setConfig(GraphDatabaseSettings.allow_store_upgrade, "true"); |
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185 | graphDb = graphDbBuilder.newGraphDatabase(); |
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186 | registerShutdownHook(graphDb); |
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187 | // store in context |
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188 | sc.setAttribute(GRAPHDB_KEY, graphDb); |
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189 | // AnnotationStore |
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190 | store = new AnnotationStore(graphDb); |
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191 | sc.setAttribute(ANNSTORE_KEY, store); |
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192 | // admin server |
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193 | srv = new WrappingNeoServerBootstrapper((GraphDatabaseAPI) graphDb); |
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194 | logger.debug("Starting DB admin server..."); |
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195 | // store in context |
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196 | sc.setAttribute(GRAPHDBSRV_KEY, srv); |
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197 | srv.start(); |
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198 | } else { |
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199 | logger.error("Unable to get resource " + dbFn); |
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200 | } |
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201 | } else { |
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202 | // get existing AnnotationStore |
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203 | store = (AnnotationStore) sc.getAttribute(ANNSTORE_KEY); |
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204 | } |
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205 | /* |
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206 | * read consumerKeys from webapp |
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207 | */ |
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208 | consumerKeys = (Properties) sc.getAttribute(CONSUMERKEYS_KEY); |
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209 | if (consumerKeys == null) { |
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210 | consumerKeys = new Properties(); |
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211 | InputStream ps = getResourceAsStream(sc, CONSUMER_KEYS_PATH); |
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212 | if (ps != null) { |
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213 | logger.debug("loading consumer keys from " + CONSUMER_KEYS_PATH); |
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214 | try { |
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215 | consumerKeys.load(ps); |
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216 | } catch (IOException e) { |
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217 | // TODO Auto-generated catch block |
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218 | e.printStackTrace(); |
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219 | } |
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220 | logger.debug("consumer keys: " + consumerKeys); |
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221 | } else { |
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222 | logger.error("Unable to get resource " + CONSUMER_KEYS_PATH); |
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223 | } |
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224 | // store config |
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225 | sc.setAttribute(CONSUMERKEYS_KEY, consumerKeys); |
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226 | } |
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227 | } else { |
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228 | logger.error("Unable to get ServletContext!"); |
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229 | } |
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230 | } |
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231 | |
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232 | public abstract String getVersion(); |
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233 | |
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234 | /** |
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235 | * @return the authorizationMode |
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236 | */ |
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237 | public boolean isAuthorizationMode() { |
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238 | return authorizationMode; |
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239 | } |
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240 | |
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241 | /** |
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242 | * @return the store |
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243 | */ |
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244 | public AnnotationStore getAnnotationStore() { |
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245 | return store; |
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246 | } |
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247 | |
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248 | /** |
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249 | * returns consumer secret for consumer key. returns null if consumer key |
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250 | * doesn't exist. |
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251 | * |
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252 | * @param consumerKey |
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253 | * @return |
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254 | */ |
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255 | public String getConsumerSecret(String consumerKey) { |
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256 | return consumerKeys.getProperty(consumerKey); |
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257 | } |
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258 | |
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259 | /** |
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260 | * Hole den vollen Benutzernamen aus dem LDAP |
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261 | * |
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262 | * @param creator |
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263 | * @return |
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264 | */ |
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265 | public String getFullNameFromLdap(String creator) { |
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266 | String retString = creator; // falls nichts gefunden wird einfach den |
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267 | // creator zurueckgeben |
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268 | if (ldapServerUrl == null) { |
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269 | return retString; |
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270 | } |
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271 | Hashtable<String, String> env = new Hashtable<String, String>(); |
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272 | String sp = "com.sun.jndi.ldap.LdapCtxFactory"; |
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273 | env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, sp); |
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274 | env.put(javax.naming.Context.PROVIDER_URL, ldapServerUrl); |
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275 | |
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276 | DirContext dctx; |
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277 | try { |
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278 | dctx = new InitialDirContext(env); |
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279 | } catch (NamingException e) { |
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280 | logger.error("Error in getFullNameFromLDAP!", e); |
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281 | return retString; |
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282 | } |
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283 | |
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284 | String base = "ou=people"; |
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285 | |
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286 | SearchControls sc = new SearchControls(); |
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287 | String[] attributeFilter = { "cn", "mail" }; |
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288 | sc.setReturningAttributes(attributeFilter); |
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289 | sc.setSearchScope(SearchControls.SUBTREE_SCOPE); |
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290 | |
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291 | String filter = "(uid=" + creator + ")"; |
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292 | |
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293 | try { |
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294 | NamingEnumeration<SearchResult> results = dctx.search(base, filter, sc); |
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295 | while (results.hasMore()) { |
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296 | SearchResult sr = (SearchResult) results.next(); |
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297 | javax.naming.directory.Attributes attrs = sr.getAttributes(); |
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298 | |
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299 | Attribute attr = attrs.get("cn"); |
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300 | retString = (String) attr.get(); |
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301 | } |
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302 | } catch (NamingException e) { |
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303 | logger.error("Error in getFullNameFromLDAP!", e); |
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304 | } |
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305 | |
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306 | try { |
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307 | dctx.close(); |
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308 | } catch (NamingException e) { |
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309 | logger.error("Error in getFullNameFromLDAP!", e); |
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310 | } |
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311 | return retString; |
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312 | } |
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313 | |
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314 | /** |
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315 | * returns resource from path (in webapp) as InputStream. |
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316 | * |
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317 | * @param sc |
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318 | * @param path |
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319 | * @return |
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320 | */ |
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321 | protected InputStream getResourceAsStream(ServletContext sc, String path) { |
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322 | InputStream ps = sc.getResourceAsStream(path); |
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323 | if (ps == null) { |
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324 | // try as file |
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325 | File pf = new File(sc.getRealPath(path)); |
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326 | if (pf != null) { |
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327 | logger.debug("trying file for: " + pf); |
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328 | try { |
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329 | ps = new FileInputStream(pf); |
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330 | } catch (FileNotFoundException e) { |
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331 | logger.error(e); |
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332 | } |
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333 | } |
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334 | } |
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335 | return ps; |
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336 | } |
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337 | |
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338 | /** |
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339 | * get a real file name for a web app file pathname. |
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340 | * |
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341 | * If filename starts with "/" its treated as absolute else the path is |
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342 | * appended to the base directory of the web-app. |
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343 | * |
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344 | * @param filename |
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345 | * @param sc |
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346 | * @return |
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347 | */ |
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348 | public static String getResourcePath(ServletContext sc, String filename) { |
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349 | File f = new File(filename); |
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350 | // is the filename absolute? |
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351 | if (!f.isAbsolute()) { |
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352 | // relative path -> use getRealPath to resolve in webapp |
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353 | filename = sc.getRealPath(filename); |
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354 | } |
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355 | return filename; |
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356 | } |
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357 | |
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358 | /* |
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359 | * (non-Javadoc) |
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360 | * |
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361 | * @see org.restlet.Application#stop() |
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362 | */ |
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363 | @Override |
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364 | public synchronized void stop() throws Exception { |
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365 | /* |
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366 | * trying to clean up databases, not sure if this is the right way... |
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367 | */ |
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368 | if (srv != null) { |
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369 | logger.debug("Stopping DB admin server..."); |
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370 | srv.stop(); |
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371 | srv = null; |
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372 | } |
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373 | if (graphDb != null) { |
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374 | logger.debug("Stopping DB..."); |
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375 | graphDb.shutdown(); |
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376 | graphDb = null; |
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377 | } |
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378 | super.stop(); |
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379 | } |
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380 | |
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381 | private static void registerShutdownHook(final GraphDatabaseService graphDb) { |
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382 | // Registers a shutdown hook for the Neo4j instance so that it |
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383 | // shuts down nicely when the VM exits (even if you "Ctrl-C" the |
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384 | // running example before it's completed) |
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385 | Runtime.getRuntime().addShutdownHook(new Thread() { |
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386 | @Override |
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387 | public void run() { |
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388 | graphDb.shutdown(); |
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389 | } |
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390 | }); |
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391 | } |
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392 | |
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393 | } |
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