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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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3
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22 import org.neo4j.graphdb.GraphDatabaseService;
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23 import org.neo4j.graphdb.factory.GraphDatabaseFactory;
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24 import org.neo4j.kernel.AbstractGraphDatabase;
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25 import org.neo4j.server.WrappingNeoServerBootstrapper;
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1
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26 import org.restlet.Application;
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27 import org.restlet.Context;
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28 import org.restlet.Restlet;
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29 import org.restlet.routing.Router;
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30
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4
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31 import de.mpiwg.itgroup.annotations.neo4j.AnnotationStore;
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32
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33 public class RestServer extends Application {
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34
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4
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35 public static Logger logger = Logger.getLogger(RestServer.class);
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36
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37 /**
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38 * Properties holding consumer keys and secrets
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39 */
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40 private Properties consumerKeys;
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3
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41 public String CONSUMER_KEYS_PATH = "WEB-INF/consumerkeys.property";
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42
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43 private Properties serverConfig;
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44 public String CONFIG_PROPS_PATH = "WEB-INF/serverconfig.property";
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45
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46 private GraphDatabaseService graphDb;
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47 public static final String GRAPHDB_KEY = "annotationmanager.graphdb";
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48 public static final String GRAPHDB_PATH_KEY = "annotationmanager.graphdb.path";
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49 public String graphdbPath = "WEB-INF/neo4j-annotation-db";
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50
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4
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51 private WrappingNeoServerBootstrapper srv;
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52 public static final String GRAPHDBSRV_KEY = "annotationmanager.graphdb.srv";
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53
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54 private AnnotationStore store;
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55 public static final String ANNSTORE_KEY = "annotationmanager.store";
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56
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57 /**
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58 * constructor
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59 *
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60 * @param parentContext
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61 */
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62 public RestServer(Context parentContext) {
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63 super(parentContext);
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64 // TODO: is this the right place to run the log4j configurator?
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65 BasicConfigurator.configure();
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66
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67 ServletContext sc = (ServletContext) getContext().getServerDispatcher().getContext().getAttributes()
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68 .get("org.restlet.ext.servlet.ServletContext");
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69 if (sc != null) {
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70 /*
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71 * read config from webapp
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72 */
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73 serverConfig = new Properties();
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74 InputStream ps1 = getResourceAsStream(sc, CONFIG_PROPS_PATH);
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75 if (ps1 != null) {
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76 logger.debug("loading config from " + CONFIG_PROPS_PATH);
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77 try {
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78 serverConfig.load(ps1);
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79 /*
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80 * read serverconfig options
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81 */
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82 graphdbPath = serverConfig.getProperty(GRAPHDB_PATH_KEY, graphdbPath);
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83 } catch (IOException e) {
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84 logger.warn("Error loading server config: ", e);
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85 }
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86 logger.debug("config: " + serverConfig);
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87 } else {
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88 logger.error("Unable to get resource " + CONFIG_PROPS_PATH);
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89 }
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90 // look for database service in context
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91 graphDb = (GraphDatabaseService) sc.getAttribute(GRAPHDB_KEY);
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92 if (graphDb == null) {
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93 /*
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94 * open database
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95 */
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96 String dbFn = getResourcePath(sc, graphdbPath);
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97 if (dbFn != null) {
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98 logger.debug("opening DB " + dbFn);
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99 graphDb = new GraphDatabaseFactory().newEmbeddedDatabase(dbFn);
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100 registerShutdownHook(graphDb);
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101 // store in context
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102 sc.setAttribute(GRAPHDB_KEY, graphDb);
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103 // AnnotationStore
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104 store = new AnnotationStore(graphDb);
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105 sc.setAttribute(ANNSTORE_KEY, store);
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106 // admin server
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107 srv = new WrappingNeoServerBootstrapper((AbstractGraphDatabase) graphDb);
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108 logger.debug("Starting DB admin server...");
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109 // store in context
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110 sc.setAttribute(GRAPHDBSRV_KEY, srv);
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111 srv.start();
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112 } else {
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113 logger.error("Unable to get resource " + dbFn);
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114 }
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115 }
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116 /*
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117 * read consumerKeys from webapp
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118 */
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119 consumerKeys = new Properties();
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120 InputStream ps2 = getResourceAsStream(sc, CONSUMER_KEYS_PATH);
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121 if (ps2 != null) {
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122 logger.debug("loading consumer keys from " + CONSUMER_KEYS_PATH);
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123 try {
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124 consumerKeys.load(ps2);
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125 } catch (IOException e) {
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126 // TODO Auto-generated catch block
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127 e.printStackTrace();
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128 }
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129 logger.debug("consumer keys: " + consumerKeys);
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130 } else {
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131 logger.error("Unable to get resource " + CONSUMER_KEYS_PATH);
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132 }
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133 } else {
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134 logger.error("Unable to get ServletContext!");
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135 }
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136
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137 }
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138
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139 /**
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140 * returns consumer secret for consumer key. returns null if consumer key
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141 * doesn't exist.
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142 *
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143 * @param consumerKey
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144 * @return
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145 */
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146 public String getConsumerSecret(String consumerKey) {
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147 return consumerKeys.getProperty(consumerKey);
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148 }
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149
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150 /*
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151 * (non-Javadoc)
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152 *
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153 * @see org.restlet.Application#createInboundRoot()
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154 */
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155 @Override
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156 public Restlet createInboundRoot() {
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3
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157 // this.authenticator = createAuthenticator();
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158
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159 Router router = new Router(getContext());
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160
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161 router.attach("/annotator/annotations", AnnotatorAnnotations.class);
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162 router.attach("/annotator/annotations/{id}", AnnotatorAnnotations.class);
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163 router.attach("/annotator/search", AnnotatorSearch.class);
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164
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165 // router.attach("",redirector); router.attach("/annotator",
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166 // ExtendedAnnotationInput.class);
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167
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168 router.attach("/", AnnotatorInfo.class);
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169 // authenticator.setNext(router);
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170 // return authenticator;
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171
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172 return router;
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173 }
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174
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175 /**
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176 * Hole den vollen Benutzernamen aus dem LDAP
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177 *
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178 * @param creator
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179 * @return
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180 */
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181 public String getFullNameFromLdap(String creator) {
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182 String retString = creator; // falls nichts gefunden wird einfach den
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183 // creator zurueckgeben
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184 Hashtable<String, String> env = new Hashtable<String, String>();
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185 String sp = "com.sun.jndi.ldap.LdapCtxFactory";
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186 env.put(javax.naming.Context.INITIAL_CONTEXT_FACTORY, sp);
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187
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188 // TODO: should go into config file
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189 String ldapUrl = "ldap://ldap.mpiwg-berlin.mpg.de/dc=mpiwg-berlin,dc=mpg,dc=de";
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190 env.put(javax.naming.Context.PROVIDER_URL, ldapUrl);
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191
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192 DirContext dctx;
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193 try {
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194 dctx = new InitialDirContext(env);
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195 } catch (NamingException e1) {
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196 // TODO Auto-generated catch block
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197 e1.printStackTrace();
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198 return retString;
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199 }
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200
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201 String base = "ou=people";
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202
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203 SearchControls sc = new SearchControls();
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204 String[] attributeFilter = { "cn", "mail" };
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205 sc.setReturningAttributes(attributeFilter);
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206 sc.setSearchScope(SearchControls.SUBTREE_SCOPE);
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207
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208 String filter = "(uid=" + creator + ")";
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209
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210 try {
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211 NamingEnumeration<SearchResult> results = dctx.search(base, filter, sc);
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212 while (results.hasMore()) {
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213 SearchResult sr = (SearchResult) results.next();
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214 javax.naming.directory.Attributes attrs = sr.getAttributes();
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215
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216 Attribute attr = attrs.get("cn");
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217 retString = (String) attr.get();
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218 }
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219 } catch (NamingException e) {
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220 // TODO Auto-generated catch block
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221 e.printStackTrace();
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222 }
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223
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224 try {
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225 dctx.close();
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226 } catch (NamingException e) {
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227 // TODO Auto-generated catch block
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228 e.printStackTrace();
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229 }
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230 return retString;
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231 }
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232
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233 /**
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234 * returns resource from path (in webapp) as InputStream.
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235 *
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236 * @param sc
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237 * @param path
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238 * @return
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239 */
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240 protected InputStream getResourceAsStream(ServletContext sc, String path) {
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241 InputStream ps = sc.getResourceAsStream(path);
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242 if (ps == null) {
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243 // try as file
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244 File pf = new File(sc.getRealPath(path));
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245 if (pf != null) {
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246 logger.debug("trying file for: " + pf);
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247 try {
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248 ps = new FileInputStream(pf);
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249 } catch (FileNotFoundException e) {
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250 logger.error(e);
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251 }
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252 }
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253 }
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254 return ps;
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255 }
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256
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257 /**
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258 * get a real file name for a web app file pathname.
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259 *
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260 * If filename starts with "/" its treated as absolute else the path is
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261 * appended to the base directory of the web-app.
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262 *
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263 * @param filename
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264 * @param sc
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265 * @return
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266 */
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267 public static String getResourcePath(ServletContext sc, String filename) {
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268 File f = new File(filename);
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269 // is the filename absolute?
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270 if (!f.isAbsolute()) {
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271 // relative path -> use getRealPath to resolve in webapp
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272 filename = sc.getRealPath(filename);
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273 }
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274 return filename;
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275 }
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276
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277 /* (non-Javadoc)
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278 * @see org.restlet.Application#stop()
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279 */
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280 @Override
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281 public synchronized void stop() throws Exception {
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282 /*
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283 * trying to clean up databases, nur sure if this is the right way...
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284 */
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285 if (srv != null) {
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286 logger.debug("Stopping DB admin server...");
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287 srv.stop();
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288 srv = null;
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289 }
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290 if (graphDb != null) {
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291 logger.debug("Stopping DB...");
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292 graphDb.shutdown();
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293 graphDb = null;
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294 }
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295 super.stop();
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296 }
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297
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298 private static void registerShutdownHook(final GraphDatabaseService graphDb) {
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299 // Registers a shutdown hook for the Neo4j instance so that it
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300 // shuts down nicely when the VM exits (even if you "Ctrl-C" the
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301 // running example before it's completed)
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302 Runtime.getRuntime().addShutdownHook(new Thread() {
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303 @Override
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304 public void run() {
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305 graphDb.shutdown();
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306 }
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307 });
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308 }
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309
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310
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311 }
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