Examples of javax.websocket.server.ServerContainer

javax.websocket.server.ServerContainer
The ServerContainer is the specialized view of the WebSocketContainer available in server-side deployments. There is one ServerContainer instance per websocket application. The ServerContainer holds the methods to be able to register server endpoints during the initialization phase of the application.
For websocket enabled web containers, developers may obtain a reference to the ServerContainer instance by retrieving it as an attribute named javax.websocket.server.ServerContainer on the ServletContext. This way, the registration methods held on this interface may be called to register server endpoints from a ServletContextListener during the deployment of the WAR file containing the endpoint.

WebSocket implementations that run outside the web container may have other means by which to provide a ServerContainer instance to the developer at application deployment time.

Once the application deployment phase is complete, and the websocket application has begun accepting incoming connections, the registration methods may no longer be called. @author dannycoward


            ServletContextHandler context = new ServletContextHandler(ServletContextHandler.SESSIONS);
            context.setContextPath("/");
            server.setHandler(context);


            ServerContainer wsContainer = WebSocketServerContainerInitializer.configureContext(context);
            String inputTransformClassName =
                    wsProps.getProperty("ws.inputTransformClass", "us.b3k.kafka.ws.transforms.Transform");
            String outputTransformClassName =
                    wsProps.getProperty("ws.outputTransformClass", "us.b3k.kafka.ws.transforms.Transform");
            KafkaConsumerFactory consumerFactory =
                    KafkaConsumerFactory.create(consumerProps, Class.forName(outputTransformClassName));
            KafkaProducerFactory producerFactory =
                    KafkaProducerFactory.create(producerProps, Class.forName(inputTransformClassName));


            KafkaWebsocketEndpoint.Configurator.CONSUMER_FACTORY = consumerFactory;
            KafkaWebsocketEndpoint.Configurator.PRODUCER = producerFactory.getProducer();


            wsContainer.addEndpoint(KafkaWebsocketEndpoint.class);


            server.start();
            server.join();
        } catch (Exception e) {
            LOG.error("Failed to start the server: {}", e.getMessage());

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        public static final String PATH = "/block";


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            Constants.SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                // Reset blocking state
                BlockingPojo.resetBlock();
                sc.addEndpoint(BlockingPojo.class);
            } catch (DeploymentException e) {
                throw new IllegalStateException(e);
            }
        }

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        private static final String PATH = "/test";


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            Constants.SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                sc.addEndpoint(ServerEndpointConfig.Builder.create(
                        ConstantTxEndpoint.class, PATH).build());
                if (TestWsWebSocketContainer.timeoutOnContainer) {
                    sc.setAsyncSendTimeout(TIMEOUT_MS);
                }
            } catch (DeploymentException e) {
                throw new IllegalStateException(e);
            }
        }

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    public static class Config extends WsContextListener {
        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc = (ServerContainer) sce.getServletContext()
                    .getAttribute(Constants.
                            SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                sc.addEndpoint(SubProtocolsEndpoint.class);
            } catch (DeploymentException e) {
                throw new IllegalStateException(e);
            }
        }

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    public static class ProgramaticServerEndpointConfig extends WsContextListener {


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            org.apache.tomcat.websocket.server.Constants.
                            SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                sc.addEndpoint(new ServerEndpointConfig() {
                    @Override
                    public Map<String, Object> getUserProperties() {
                        return Collections.emptyMap();
                    }
                    @Override

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        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);


            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            Constants.SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);


            ServerEndpointConfig sec = ServerEndpointConfig.Builder.create(
                    TesterEchoServer.Basic.class, "/{param}").build();


            try {
                sc.addEndpoint(sec);
            } catch (DeploymentException e) {
                throw new RuntimeException(e);
            }
        }

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        d.setAsyncSupported(true);
        d.addMapping(waAnn.httpUrlPatterns());
        d.addMapping(waAnn.value());


        // web socket
        final ServerContainer scon = (ServerContainer) sc.getAttribute("javax.websocket.server.ServerContainer");
        for (String wsPath : waAnn.webSocketUrlPatterns()) {
            try {
                scon.addEndpoint(ServerEndpointConfig.Builder.create(WebActorEndpoint.class, wsPath).configurator(new EmbedHttpSessionWsConfigurator()).build());
            } catch (DeploymentException ex) {
                sc.log("Unable to deploy endpoint", ex);
            }
        }
    }

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    public static class ProgramaticServerEndpointConfig extends WsContextListener {


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            org.apache.tomcat.websocket.server.Constants.
                            SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                sc.addEndpoint(new ServerEndpointConfig() {
                    @Override
                    public Map<String, Object> getUserProperties() {
                        return Collections.emptyMap();
                    }
                    @Override

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        public static final String PATH = "/block";


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            Constants.SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                // Reset blocking state
                BlockingPojo.resetBlock();
                sc.addEndpoint(BlockingPojo.class);
            } catch (DeploymentException e) {
                throw new IllegalStateException(e);
            }
        }

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        private static final String PATH = "/test";


        @Override
        public void contextInitialized(ServletContextEvent sce) {
            super.contextInitialized(sce);
            ServerContainer sc =
                    (ServerContainer) sce.getServletContext().getAttribute(
                            Constants.SERVER_CONTAINER_SERVLET_CONTEXT_ATTRIBUTE);
            try {
                sc.addEndpoint(ServerEndpointConfig.Builder.create(
                        ConstantTxEndpoint.class, PATH).build());
                if (TestWsWebSocketContainer.timoutOnContainer) {
                    sc.setAsyncSendTimeout(TIMEOUT_MS);
                }
            } catch (DeploymentException e) {
                throw new IllegalStateException(e);
            }
        }

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