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

                    .getResourceRef());


            if (cr.getRiapAuthorityType() == LocalReference.RIAP_APPLICATION) {
                if ((getChildContext() != null)
                        && (getChildContext().getChild() instanceof Application)) {
                    Application application = (Application) getChildContext()
                            .getChild();
                    request.getResourceRef().setBaseRef(
                            request.getResourceRef().getHostIdentifier());
                    application.getRoot().handle(request, response);
                }
            } else if (cr.getRiapAuthorityType() == LocalReference.RIAP_COMPONENT) {
                parentHandle(request, response);
            } else if (cr.getRiapAuthorityType() == LocalReference.RIAP_HOST) {
                parentHandle(request, response);
            } else {
                getLogger()
                        .warning(
                                "Unknown RIAP authority. Only \"component\", \"host\" and \"application\" are supported.");
            }
        } else {
            if ((getChildContext() != null)
                    && (getChildContext().getChild() instanceof Application)) {
                Application application = (Application) getChildContext()
                        .getChild();


                if (!application.getConnectorService().getClientProtocols()
                        .contains(protocol)) {
                    getLogger()
                            .fine(
                                    "The protocol used by this request is not declared in the application's connector service. "
                                            + "Please update the list of client connectors used by your application and restart it.");

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


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

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


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


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


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


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


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


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


                        if (!serverFound) {
                            getHelped()
                                    .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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     *            The request to lookup.
     * @return The metadata service associated to a request.
     */
    public MetadataService getMetadataService(Request request) {
        MetadataService result = null;
        final Application application = Application.getCurrent();


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

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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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        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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    private void stopVirtualHostApplications(VirtualHost host) throws Exception {
        for (Route route : host.getRoutes()) {
            Restlet next = route.getNext();


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


                if (application.isStarted()) {
                    application.stop();
                }
            }
        }
    }

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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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