Examples of io.undertow.server.HttpHandler

io.undertow.server.HttpHandler
A handler for an HTTP request. The request handler must eventually either call another handler or end the exchange. @author David M. Lloyd

        servletHandler = wrapHandlers(servletHandler, managedServlet.getServletInfo().getHandlerChainWrappers());
        return new ServletChain(servletHandler, managedServlet , servletPath);
    }


    private static HttpHandler wrapHandlers(final HttpHandler wrapee, final List<HandlerWrapper> wrappers) {
        HttpHandler current = wrapee;
        for (HandlerWrapper wrapper : wrappers) {
            current = wrapper.wrap(current);
        }
        return current;
    }

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            executor = servletContext.getDeployment().getExecutor();
        }


        if (exchange.isInIoThread() || executor != null) {
            //either the exchange has not been dispatched yet, or we need to use a special executor
            exchange.dispatch(executor, new HttpHandler() {
                @Override
                public void handleRequest(final HttpServerExchange exchange) throws Exception {
                    dispatchRequest(exchange, servletRequestContext, info, DispatcherType.REQUEST);
                }
            });

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    public static void main(final String[] args) {
        try {
            final Undertow server1 = Undertow.builder()
                    .addListener(8081, "localhost")
                    .setHandler(new HttpHandler() {
                        @Override
                        public void handleRequest(HttpServerExchange exchange) throws Exception {
                            exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
                            exchange.getResponseSender().send("Server1");
                        }
                    })
                    .build();


            server1.start();


            final Undertow server2 = Undertow.builder()
                    .addListener(8082, "localhost")
                    .setHandler(new HttpHandler() {
                        @Override
                        public void handleRequest(HttpServerExchange exchange) throws Exception {
                            exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
                            exchange.getResponseSender().send("Server2");
                        }
                    })
                    .build();
            server2.start();


            final Undertow server3 = Undertow.builder()
                    .addListener(8083, "localhost")
                    .setHandler(new HttpHandler() {
                        @Override
                        public void handleRequest(HttpServerExchange exchange) throws Exception {
                            exchange.getResponseHeaders().put(Headers.CONTENT_TYPE, "text/plain");
                            exchange.getResponseSender().send("Server3");
                        }

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            executor = servletContext.getDeployment().getExecutor();
        }


        if (exchange.isInIoThread() || executor != null) {
            //either the exchange has not been dispatched yet, or we need to use a special executor
            exchange.dispatch(executor, new HttpHandler() {
                @Override
                public void handleRequest(final HttpServerExchange exchange) throws Exception {
                    dispatchRequest(exchange, servletRequestContext, info, DispatcherType.REQUEST);
                }
            });

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            initializeMimeMappings(deployment, deploymentInfo);
            initializeTempDir(servletContext, deploymentInfo);
            listeners.contextInitialized();
            //run


            HttpHandler wrappedHandlers = ServletDispatchingHandler.INSTANCE;
            wrappedHandlers = wrapHandlers(wrappedHandlers, deploymentInfo.getInnerHandlerChainWrappers());
            HttpHandler securityHandler = setupSecurityHandlers(wrappedHandlers);
            wrappedHandlers = new PredicateHandler(DispatcherTypePredicate.REQUEST, securityHandler, wrappedHandlers);


            HttpHandler outerHandlers = wrapHandlers(wrappedHandlers, deploymentInfo.getOuterHandlerChainWrappers());
            wrappedHandlers = new PredicateHandler(DispatcherTypePredicate.REQUEST, outerHandlers, wrappedHandlers);


            final ServletInitialHandler servletInitialHandler = new ServletInitialHandler(deployment.getServletPaths(), wrappedHandlers, deployment.getThreadSetupAction(), servletContext);




            HttpHandler initialHandler = wrapHandlers(servletInitialHandler, deployment.getDeploymentInfo().getInitialHandlerChainWrappers());
            initialHandler = new HttpContinueReadHandler(initialHandler);
            initialHandler = handleDevelopmentModePersistentSessions(initialHandler, deploymentInfo, deployment.getSessionManager(), servletContext);
            if(deploymentInfo.getUrlEncoding() != null) {
                initialHandler = Handlers.urlDecodingHandler(deploymentInfo.getUrlEncoding(), initialHandler);
            }

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            factoryMap.put(DIGEST_AUTH, DigestAuthenticationMechanism.FACTORY);
        }
        if(!factoryMap.containsKey(CLIENT_CERT_AUTH)) {
            factoryMap.put(CLIENT_CERT_AUTH, ClientCertAuthenticationMechanism.FACTORY);
        }
        HttpHandler current = initialHandler;
        current = new SSLInformationAssociationHandler(current);


        final SecurityPathMatches securityPathMatches = buildSecurityConstraints();
        current = new AuthenticationCallHandler(current);
        if (!securityPathMatches.isEmpty()) {

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        return new ApplicationListeners(managedListeners, deployment.getServletContext());
    }




    private static HttpHandler wrapHandlers(final HttpHandler wrapee, final List<HandlerWrapper> wrappers) {
        HttpHandler current = wrapee;
        for (HandlerWrapper wrapper : wrappers) {
            current = wrapper.wrap(current);
        }
        return current;
    }

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            //because listeners can add other listeners
            ArrayList<Lifecycle> lifecycles = new ArrayList<Lifecycle>(deployment.getLifecycleObjects());
            for (Lifecycle object : lifecycles) {
                object.start();
            }
            HttpHandler root = deployment.getHandler();


            state = State.STARTED;
            return root;
        } finally {
            handle.tearDown();

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            executor = servletContext.getDeployment().getExecutor();
        }


        if (exchange.isInIoThread() || executor != null) {
            //either the exchange has not been dispatched yet, or we need to use a special executor
            exchange.dispatch(executor, new HttpHandler() {
                @Override
                public void handleRequest(final HttpServerExchange exchange) throws Exception {
                    if(System.getSecurityManager() == null) {
                        dispatchRequest(exchange, servletRequestContext, info.getServletChain(), DispatcherType.REQUEST);
                    } else {

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                                    .addMapping("/myservlet"));


            DeploymentManager manager = defaultContainer().addDeployment(servletBuilder);
            manager.deploy();


            HttpHandler servletHandler = manager.start();
            PathHandler path = Handlers.path(Handlers.redirect(MYAPP))
                    .addPrefixPath(MYAPP, servletHandler);
            Undertow server = Undertow.builder()
                    .addListener(8080, "localhost")
                    .setHandler(path)

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