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annotate artifact-database/src/main/java/de/intevation/artifactdatabase/rest/Standalone.java @ 90:68285f7bc476

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More javadoc. artifacts/trunk@846 c6561f87-3c4e-4783-a992-168aeb5c3f6f
author Sascha L. Teichmann <sascha.teichmann@intevation.de>
date Fri, 26 Mar 2010 17:59:50 +0000
parents 69c84cf7c5d7
children e27cf9c84eb8
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.Component;
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4
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5 import org.restlet.data.Protocol;
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6
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7 import de.intevation.artifacts.ArtifactDatabase;
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8
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9 import de.intevation.artifactdatabase.Config;
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10
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11 import org.apache.log4j.Logger;
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12
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13 /**
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14 * Starts an HTTP server bound to a RestApp.
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15 * The server (binding interface and port) is configure via the
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16 * global configuration.
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17 *
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18 * @author <a href="mailto:sascha.teichmann@intevation">Sascha L. Teichmann</a>
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19 */
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20 public class Standalone
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21 {
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22 private static Logger logger = Logger.getLogger(Standalone.class);
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23
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24 /**
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25 * XPath to figure out the port where to listen from the
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26 * global configuration.
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27 */
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28 public static final String REST_PORT =
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29 "/artifact-database/rest-server/port/text()";
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30
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31 /**
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32 * XPath to figure out from global configuration
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33 * which network interface to use to bind the HTTP server.
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34 */
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35 public static final String LISTEN_INTERFACE =
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36 "/artifact-database/rest-server/listen/text()";
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37
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38 /**
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39 * The default port of the HTTP server: 8181
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40 */
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41 public static final int DEFAULT_PORT = 8181;
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42
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43 /**
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44 * Builds a RestApp wrapped around the given artifact database,
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45 * and bind this application to HTTP server. The HTTP server
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46 * is configured by the global configuration. If no port is
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47 * given by the configuration the default port is used. If
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48 * no interface is given the HTTP server is reachable from
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49 * all interfaces.
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50 * @param db The artifact database to be exposed via the
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51 * REST application.
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52 */
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53 public static void startAsServer(ArtifactDatabase db) {
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54 String portString = Config.getStringXPath(REST_PORT);
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55 String listenString = Config.getStringXPath(LISTEN_INTERFACE);
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56
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57 int port = DEFAULT_PORT;
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58
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59 if (portString != null) {
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60 try {
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61 port = Integer.parseInt(portString);
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62 if (port < 0) {
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63 throw new NumberFormatException();
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64 }
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65 }
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66 catch (NumberFormatException nfe) {
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67 logger.error("rest port is not a positive integer value.", nfe);
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68 return;
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69 }
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70 }
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71
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72 RestApp app = new RestApp(db);
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73
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74 Component component = new Component();
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75
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76 if (listenString != null) {
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77 component.getServers().add(Protocol.HTTP, listenString, port);
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78 }
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79 else {
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80 component.getServers().add(Protocol.HTTP, port);
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81 }
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82
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83 component.getDefaultHost().attach(app);
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84
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85 logger.info("Starting rest HTTP server on "
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86 + (listenString != null ? listenString : "*")
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87 + ":" + port);
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88
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89 try {
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90 component.start();
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91 }
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92 catch (Exception e) {
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93 logger.error(e.getLocalizedMessage(), e);
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94 }
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95 }
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96 }
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97 // vim:set ts=4 sw=4 si et sta sts=4 fenc=utf8 :
http://dive4elements.wald.intevation.org