Examples of io.undertow.server.HttpServerExchange$WrapperConduitFactory

io.undertow.server.HttpServerExchange
Channel implementation that is actually provided to clients of the exchange. We do not provide the underlying conduit channel, as this will become the next requests conduit channel, so if a thread is still hanging onto this exchange it can result in problems.
It also delays a readResume call until the current call stack has returned, thus ensuring that only 1 thread is active in the exchange at any one time.
It also handles buffered request data.

    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        final ByteBufferSlicePool bufferPool = new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024);
        MockServerConnection connection = new MockServerConnection(bufferPool);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if (request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if (info.getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info, DispatcherType.REQUEST);
        } catch (Exception e) {

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        } catch (IllegalStateException e) {


        }
        final boolean include = req.getDispatcherType() == DispatcherType.INCLUDE;
        if (!req.getMethod().equals(Methods.HEAD_STRING)) {
            HttpServerExchange exchange = SecurityActions.requireCurrentServletRequestContext().getOriginalRequest().getExchange();
            resource.serve(exchange.getResponseSender(), exchange, new IoCallback() {


                @Override
                public void onComplete(final HttpServerExchange exchange, final Sender sender) {
                    if (!include) {
                        sender.close();

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    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        HttpServerConnection connection = new HttpServerConnection(null,new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024), next, OptionMap.EMPTY, 1024);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if(request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if(info.getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info, DispatcherType.REQUEST);
        } catch (Exception e) {

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    @Override
    public void dispatchMockRequest(HttpServletRequest request, HttpServletResponse response) throws ServletException {


        final ByteBufferSlicePool bufferPool = new ByteBufferSlicePool(BufferAllocator.BYTE_BUFFER_ALLOCATOR, 1024, 1024);
        MockServerConnection connection = new MockServerConnection(bufferPool);
        HttpServerExchange exchange = new HttpServerExchange(connection);
        exchange.setRequestScheme(request.getScheme());
        exchange.setRequestMethod(new HttpString(request.getMethod()));
        exchange.setProtocol(Protocols.HTTP_1_0);
        exchange.setResolvedPath(request.getContextPath());
        String relative;
        if (request.getPathInfo() == null) {
            relative = request.getServletPath();
        } else {
            relative = request.getServletPath() + request.getPathInfo();
        }
        exchange.setRelativePath(relative);
        final ServletPathMatch info = paths.getServletHandlerByPath(request.getServletPath());
        final HttpServletResponseImpl oResponse = new HttpServletResponseImpl(exchange, servletContext);
        final HttpServletRequestImpl oRequest = new HttpServletRequestImpl(exchange, servletContext);
        final ServletRequestContext servletRequestContext = new ServletRequestContext(servletContext.getDeployment(), oRequest, oResponse, info);
        servletRequestContext.setServletRequest(request);
        servletRequestContext.setServletResponse(response);
        //set the max request size if applicable
        if (info.getServletChain().getManagedServlet().getMaxRequestSize() > 0) {
            exchange.setMaxEntitySize(info.getServletChain().getManagedServlet().getMaxRequestSize());
        }
        exchange.putAttachment(ServletRequestContext.ATTACHMENT_KEY, servletRequestContext);


        exchange.startBlocking(new ServletBlockingHttpExchange(exchange));
        servletRequestContext.setServletPathMatch(info);


        try {
            dispatchRequest(exchange, servletRequestContext, info.getServletChain(), DispatcherType.REQUEST);
        } catch (Exception e) {

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    }


    public void startRequest() {
        connection.resetChannel();
        state = new AjpRequestParseState();
        httpServerExchange = new HttpServerExchange(connection, maxEntitySize);
        read = 0;
    }

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            // we remove ourselves as the read listener from the channel;
            // if the http handler doesn't set any then reads will suspend, which is the right thing to do
            channel.getReadSetter().set(null);
            channel.suspendReads();


            final HttpServerExchange httpServerExchange = this.httpServerExchange;
            final AjpServerResponseConduit responseConduit = new AjpServerResponseConduit(connection.getChannel().getSinkChannel().getConduit(), connection.getBufferPool(), httpServerExchange, new ConduitListener<AjpServerResponseConduit>() {
                @Override
                public void handleEvent(AjpServerResponseConduit channel) {
                    Connectors.terminateResponse(httpServerExchange);
                }
            }, httpServerExchange.getRequestMethod().equals(Methods.HEAD));
            connection.getChannel().getSinkChannel().setConduit(responseConduit);
            connection.getChannel().getSourceChannel().setConduit(createSourceConduit(connection.getChannel().getSourceChannel().getConduit(), responseConduit, httpServerExchange));
            //we need to set the write ready handler. This allows the response conduit to wrap it
            responseConduit.setWriteReadyHandler(writeReadyHandler);


            try {
                connection.setSSLSessionInfo(state.createSslSessionInfo());
                httpServerExchange.setSourceAddress(state.createPeerAddress());
                httpServerExchange.setDestinationAddress(state.createDestinationAddress());
                if(scheme != null) {
                    httpServerExchange.setRequestScheme(scheme);
                }
                state = null;
                this.httpServerExchange = null;
                httpServerExchange.setPersistent(true);


                if(recordRequestStartTime) {
                    Connectors.setRequestStartTime(httpServerExchange);
                }
                Connectors.executeRootHandler(connection.getRootHandler(), httpServerExchange);

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    public HttpServerExchange sendOutOfBandResponse(HttpServerExchange exchange) {
        if (exchange == null || !HttpContinue.requiresContinueResponse(exchange)) {
            throw UndertowMessages.MESSAGES.outOfBandResponseOnlyAllowedFor100Continue();
        }
        final ConduitState state = resetChannel();
        HttpServerExchange newExchange = new HttpServerExchange(this);
        for (HttpString header : exchange.getRequestHeaders().getHeaderNames()) {
            newExchange.getRequestHeaders().putAll(header, exchange.getRequestHeaders().get(header));
        }
        newExchange.setProtocol(exchange.getProtocol());
        newExchange.setRequestMethod(exchange.getRequestMethod());
        exchange.setRequestURI(exchange.getRequestURI(), exchange.isHostIncludedInRequestURI());
        exchange.setRequestPath(exchange.getRequestPath());
        exchange.setRelativePath(exchange.getRelativePath());
        newExchange.getRequestHeaders().put(Headers.CONNECTION, Headers.KEEP_ALIVE.toString());
        newExchange.getRequestHeaders().put(Headers.CONTENT_LENGTH, 0);
        newExchange.setPersistent(true);


        Connectors.terminateRequest(newExchange);
        newExchange.addResponseWrapper(new ConduitWrapper<StreamSinkConduit>() {
            @Override
            public StreamSinkConduit wrap(ConduitFactory<StreamSinkConduit> factory, HttpServerExchange exchange) {


                ServerFixedLengthStreamSinkConduit fixed = new ServerFixedLengthStreamSinkConduit(new HttpResponseConduit(getSinkChannel().getConduit(), getBufferPool(), exchange), false, false);
                fixed.reset(0, exchange);
                return fixed;
            }
        });


        //we restore the read channel immediately, as this out of band response has no read side
        channel.getSourceChannel().setConduit(source(state));
        newExchange.addExchangeCompleteListener(new ExchangeCompletionListener() {
            @Override
            public void exchangeEvent(HttpServerExchange exchange, NextListener nextListener) {
                restoreChannel(state);
            }
        });

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            this.exchange = exchange;
        }


        @Override
        public void completed(final ClientExchange result) {
            HttpServerExchange exchange = result.getAttachment(EXCHANGE);
            final ClientResponse response = result.getResponse();
            final HeaderMap inboundResponseHeaders = response.getResponseHeaders();
            final HeaderMap outboundResponseHeaders = exchange.getResponseHeaders();
            exchange.setResponseCode(response.getResponseCode());
            copyHeaders(outboundResponseHeaders, inboundResponseHeaders);
            if (exchange.isPersistent() && !result.getConnection().isOpen()) {
                //just because the client side is non-persistent it does not mean we want to close the connection to
                //the backend
                outboundResponseHeaders.put(Headers.CONNECTION, "keep-alive");
            }


            if (exchange.isUpgrade()) {
                exchange.upgradeChannel(new HttpUpgradeListener() {
                    @Override
                    public void handleUpgrade(StreamConnection streamConnection, HttpServerExchange exchange) {
                        StreamConnection clientChannel = null;
                        try {
                            clientChannel = result.getConnection().performUpgrade();


                            ChannelListeners.initiateTransfer(Long.MAX_VALUE, clientChannel.getSourceChannel(), streamConnection.getSinkChannel(), ChannelListeners.closingChannelListener(), ChannelListeners.<StreamSinkChannel>writeShutdownChannelListener(ChannelListeners.<StreamSinkChannel>flushingChannelListener(ChannelListeners.closingChannelListener(), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler(), ChannelListeners.closingChannelExceptionHandler(), result.getConnection().getBufferPool());
                            ChannelListeners.initiateTransfer(Long.MAX_VALUE, streamConnection.getSourceChannel(), clientChannel.getSinkChannel(), ChannelListeners.closingChannelListener(), ChannelListeners.<StreamSinkChannel>writeShutdownChannelListener(ChannelListeners.<StreamSinkChannel>flushingChannelListener(ChannelListeners.closingChannelListener(), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler()), ChannelListeners.closingChannelExceptionHandler(), ChannelListeners.closingChannelExceptionHandler(), result.getConnection().getBufferPool());


                        } catch (IOException e) {
                            IoUtils.safeClose(streamConnection, clientChannel);
                        }
                    }
                });
            }
            IoExceptionHandler handler = new IoExceptionHandler(exchange, result.getConnection());
            ChannelListeners.initiateTransfer(Long.MAX_VALUE, result.getResponseChannel(), exchange.getResponseChannel(), ChannelListeners.closingChannelListener(), new HTTPTrailerChannelListener(result, exchange), handler, handler, exchange.getConnection().getBufferPool());


        }

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    }


    public void newRequest() {
        state.reset();
        read = 0;
        httpServerExchange = new HttpServerExchange(connection, maxEntitySize);
    }

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                    IoUtils.safeClose(connection);
                    return;
                }
            } while (!state.isComplete());


            final HttpServerExchange httpServerExchange = this.httpServerExchange;
            httpServerExchange.setRequestScheme(connection.getSslSession() != null ? "https" : "http");
            this.httpServerExchange = null;
            requestStateUpdater.set(this, 1);
            HttpTransferEncoding.setupRequest(httpServerExchange);
            if (recordRequestStartTime) {
                Connectors.setRequestStartTime(httpServerExchange);

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