Examples of org.restlet.Application

org.restlet.Application
Restlet managing a coherent set of Resources and Services. Applications are guaranteed to receive calls with their base reference set relatively to the {@link VirtualHost} that served them. This class is both a descriptor able tocreate the root Restlet and the actual Restlet that can be attached to one or more VirtualHost instances.

Applications also have many useful services associated. They are all enabled by default and are available as properties that can be eventually overridden:
- "connectorService" to declare necessary client and server connectors.
- "converterService" to convert between regular objects and representations.
- "decoderService" to automatically decode or uncompress received entities.
- "encoderService" to automatically encode or compress sent entities.
- "metadataService" to provide access to metadata and their associated extension names.
- "rangeService" to automatically exposes ranges of response entities.
- "statusService" to provide common representations for exception status.
- "taskService" to run tasks asynchronously.
- "tunnelService" to tunnel method names or client preferences via query parameters.
Concurrency note: instances of this class or its subclasses can be invoked by several threads at the same time and therefore must be thread-safe. You should be especially careful when storing state in member variables. @author Jerome Louvel

               proxy.getTunnelService().setEnabled(false);
               router.attach(content.getMatch(),proxy);
            } else {
               // hope the directory resource can handle it
               getLogger().info("  Directory: "+content.getSource()+" at "+content.getMatch());
               Application app = new Application(context) {
                  public Restlet createRoot() {
                     Directory directory = new Directory(getContext(),uri);
                     directory.setIndexName("index.html");
                     return directory;
                  }

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            try {
               getLogger().info("  Application: "+appConf.getApplicationDef().getName()+" at "+appConf.getMatch());
               LinkSet set = new LinkSet();
               set.addLinkSet(hostConf.getLinks());
               set.addLinkSet(appConf.getLinks());
               Application app = appConf.getApplication(this.context,set);
               router.attach(appConf.getMatch(),app);
               if (internalName!=null) {
                  String route = "/"+internalName+appConf.getMatch();
                  getLogger().info("   adding internal route: "+route);
                  internalRouter.attach(route,app).getTemplate().setMatchingMode(Template.MODE_STARTS_WITH);

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                     }
                  } else {
                     appContext.getParameters().add(key,"true");
                  }
               }
               Application app = null;
               if (proxyTerm!=null) {
                  String value = proxyTerm.getFirstValue();
                  List<Link> links = entry.getLinks().get(value);
                  Link target = null;
                  if (links!=null && links.size()>0) {

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      //String path = packageName+request.getResourceRef().getRemainingPart();
      String path = request.getResourceRef().getRemainingPart();
      URL script = null;
      URI resource = (URI)request.getAttributes().get(RESOURCE_ATTR);
      int extPos = path.lastIndexOf('.');
      Application app = this.getApplication();
      Properties resourceProperties = resourceConfig.match(path);
      String stype = resourceProperties.getProperty("content-type");
      MediaType type = stype==null ? null : MediaType.valueOf(stype); 
      String defaultExtension = resourceProperties.getProperty("extension");
      if (defaultExtension==null) {
         defaultExtension = ".ats";
      }
      String agentsValue = resourceProperties.getProperty("agents");
      
      String resourceTemplate = resourceProperties.getProperty("resource");
      getLogger().info("resource template: "+resourceTemplate);
      if (resource==null && resourceTemplate!=null) {
         String href = null;
         String uri = null;
         try {
            Template t = new Template(resourceTemplate);
            href = t.format(request.getAttributes());
            String baseURISpec = resourceProperties.getProperty("base-uri");
            URI baseURI = null;
            if (baseURISpec!=null) {
               Template tbase = new Template(baseURISpec);
               uri = tbase.format(request.getAttributes());
               baseURI = new URI(uri);
            }


            resource = baseURI==null ? new URI(href) : baseURI.resolve(href);
         } catch (URISyntaxException ex) {
            getLogger().log(Level.SEVERE,"Cannot construct resource URI, href="+href+", base="+uri,ex);
            return null;
         }
      }
      
      String [] agents = null;
      if (agentsValue!=null) {
         agents = agentsValue.split(",");
      }
      
      MediaType forceType = null;


      if (type==null && extPos>=0) {
         String ext = path.substring(extPos+1);
         Metadata mdata = this.getApplication().getMetadataService().getMetadata(ext);
         if (mdata!=null) {
            type = MediaType.valueOf(mdata.getName());
         }
      } else if (path.length()==0 || path.charAt(path.length()-1)=='/') {
         // no extension and is a directory path, default to index.xml template
         script = baseClass.getResource(packageName+path+"index.ats");
         if (script==null) {
            script = baseClass.getResource(packageName+path+"index.xsl");
         }
         if (resource==null) {
            try {
               URL url = baseClass.getResource(packageName+path + "index.xml");
               /*
               if (url==null) {
                  getLogger().warning("Canot find resource via class path: "+path+"index.xml");
                  return null;
               }
               resource = url.toURI();
                */
               if (url!=null) {
                  resource = url.toURI();
               }
            } catch (URISyntaxException ex) {
               getLogger().log(Level.SEVERE,"Cannot convert URL to URI: "+path,ex);
               return null;
            }
         }
         if (type==null && agents!=null) {
            String agent = request.getClientInfo().getAgent();
            for (int i=0; i<agents.length; i++) {
               String exp = resourceProperties.getProperty(agents[i]+".match");
               if (agent.matches(exp)) {
                  if (getLogger().isLoggable(Level.FINE)) {
                     getLogger().fine("Matched agent "+agent+" with "+agents[i]);
                  }
                  stype = resourceProperties.getProperty(agents[i]+".content-type");
                  forceType = stype==null ? null : MediaType.valueOf(stype); 
                  break;
               }
            }
         }
         if (type==null) {
            type = MediaType.APPLICATION_XHTML_XML;
         }
      } else {
         // no extension, so lookup based on xml file
         script = baseClass.getResource(packageName+path+defaultExtension);
         if (script==null) {
            script = baseClass.getResource(packageName+path+".xsl");
         }
         if (resource==null) {
            try {
               URL url = baseClass.getResource(packageName+path + ".xml");
               /*
               if (url==null) {
                  getLogger().warning("Canot find resource via class path: "+path+".xml");
                  return null;
               }
               resource = url.toURI();
                */
               if (url!=null) {
                  resource = url.toURI();
               }
            } catch (URISyntaxException ex) {
               getLogger().log(Level.SEVERE,"Cannot convert URL to URI: "+path);
               return null;
            }
         }
         if (type==null && agents!=null) {
            String agent = request.getClientInfo().getAgent();
            for (int i=0; i<agents.length; i++) {
               String exp = resourceProperties.getProperty(agents[i]+".match");
               if (agent.matches(exp)) {
                  stype = resourceProperties.getProperty(agents[i]+".content-type");
                  forceType = stype==null ? null : MediaType.valueOf(stype); 
                  break;
               }
            }
         }
         if (type==null) {
            type = MediaType.APPLICATION_XHTML_XML;
         }
      }
      if (type==null) {
         type = app.getMetadataService().getDefaultMediaType();
      }
      boolean isResource = (type.getMainType().equals("image") || (script==null && type.getMainType().equals("text")) || (type.getMainType().equals("application") && !type.getName().equals("application/xml") && !type.getName().endsWith("+xml")));
      String sflag = resourceProperties.getProperty("force-resource");
      if (sflag!=null && sflag.equals("true")) {
         isResource = true;

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   {
      setNegotiated(false);
      this.baseClass = baseClass;
      this.path = path;
      int extPos = path.lastIndexOf('.');
      Application app = this.getApplication();
      type = app.getMetadataService().getDefaultMediaType(); 
      if (extPos>=0) {
         String ext = path.substring(extPos+1);
         Metadata mdata = this.getApplication().getMetadataService().getMetadata(ext);
         if (mdata!=null) {
            type = MediaType.valueOf(mdata.getName());

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      xmldb.stop();
      getLogger().info("XMLDB "+dbName+" stopped.");
   }


   public Application getAdministration() {
      return new Application(context.createChildContext()) {
         public Restlet createRoot() {
            getContext().getAttributes().put(XMLDBResource.DBNAME_NAME, dbName);
            Router router = new Router(getContext());
            Restlet reindexer = new Restlet(getContext()) {
               public void handle(Request request,Response response) {

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    super.destroy();
  }


  public Application createApplication(Context context) {
    Application application = null;


    final String applicationRole = getInitParameter("role", Application.class.getName());


    final String applicationRoleHint = getInitParameter("roleHint", null);


    // Load the application class using the given class name
    try {
      if (applicationRoleHint != null) {
        application = (Application) lookup(applicationRole, applicationRoleHint);
      }
      else {
        application = (Application) lookup(applicationRole);
      }
    }
    catch (Exception e) {
      throw new IllegalStateException("The PlexusServerServlet couldn't lookup the target component (role='"
          + applicationRole + "', hint='" + applicationRoleHint + "')", e);
    }


    // mimic constructor
    application.setName(getServletConfig().getServletName());


    application.setContext(new ServletContextAdapter(this, context));


    // setting logger explicitly, to override the stupid logger put there by ServletContextAdapter
    application.getContext().setLogger(application.getClass().getName());


    // --- FROM SUPERCLASS (as is) -- BEGIN
    // Copy all the servlet parameters into the context
    final Context applicationContext = application.getContext();


    String initParam;


    // Copy all the Servlet component initialization parameters
    final javax.servlet.ServletConfig servletConfig = getServletConfig();

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     *            The request to lookup.
     * @return The metadata service associated to a request.
     */
    public MetadataService getMetadataService(Request request) {
        MetadataService result = null;
        Application application = (Application) request.getAttributes().get(
                Application.KEY);


        if (application != null) {
            result = application.getMetadataService();
        } else {
            result = new MetadataService();
        }


        return result;

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     *            The request to lookup.
     * @return The connector service associated to a request.
     */
    public ConnectorService getConnectorService(Request request) {
        ConnectorService result = null;
        Application application = (Application) request.getAttributes().get(
                Application.KEY);


        if (application != null) {
            result = application.getConnectorService();
        } else {
            result = new ConnectorService();
        }


        return result;

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        if (host != null) {
            for (Route route : host.getRoutes()) {
                Restlet next = route.getNext();


                if (next instanceof Application) {
                    Application application = (Application) next;


                    for (Protocol clientProtocol : application
                            .getConnectorService().getClientProtocols()) {
                        boolean clientFound = false;


                        // Try to find a client connector matching the client
                        // protocol
                        Client client;
                        for (Iterator<Client> iter = getComponent()
                                .getClients().iterator(); !clientFound
                                && iter.hasNext();) {
                            client = iter.next();
                            clientFound = client.getProtocols().contains(
                                    clientProtocol);
                        }


                        if (!clientFound) {
                            getComponent()
                                    .getLogger()
                                    .severe(
                                            "Unable to start the application \""
                                                    + application.getName()
                                                    + "\". Client connector for protocol "
                                                    + clientProtocol.getName()
                                                    + " is missing.");
                            result = false;
                        }
                    }


                    for (Protocol serverProtocol : application
                            .getConnectorService().getServerProtocols()) {
                        boolean serverFound = false;


                        // Try to find a server connector matching the server
                        // protocol
                        Server server;
                        for (Iterator<Server> iter = getComponent()
                                .getServers().iterator(); !serverFound
                                && iter.hasNext();) {
                            server = iter.next();
                            serverFound = server.getProtocols().contains(
                                    serverProtocol);
                        }


                        if (!serverFound) {
                            getComponent()
                                    .getLogger()
                                    .severe(
                                            "Unable to start the application \""
                                                    + application.getName()
                                                    + "\". Server connector for protocol "
                                                    + serverProtocol.getName()
                                                    + " is missing.");
                            result = false;
                        }
                    }


                    if (result && application.isStopped()) {
                        application.start();
                    }
                }
            }
        }

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