Examples of javax.servlet.WriteListener

javax.servlet.WriteListener
Callback notification mechanism that signals to the developer it's possible to write content without blocking. @since Servlet 3.1

        {
            @Override
            protected void service(HttpServletRequest request, final HttpServletResponse response) throws ServletException, IOException
            {
                final AsyncContext asyncContext = request.startAsync(request, response);
                response.getOutputStream().setWriteListener(new WriteListener()
                {
                    @Override
                    public void onWritePossible() throws IOException
                    {
                        if (throwable instanceof RuntimeException)

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            {
                response.flushBuffer();
                
                final AsyncContext async = request.startAsync();
                final ServletOutputStream out = response.getOutputStream();
                out.setWriteListener(new WriteListener()
                {
                    @Override
                    public void onWritePossible() throws IOException
                    {
                        while (out.isReady())

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            {
                final AsyncContext asyncContext = request.startAsync();
                asyncContext.setTimeout(0);
                final int bufferSize = 4096;
                response.setBufferSize(bufferSize);
                response.getOutputStream().setWriteListener(new WriteListener()
                {
                    private int writes;
                    private int written;


                    @Override

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            // Asynchronous Write
            final String[] writes = request.getParameterValues("w");
            final ServletOutputStream out = response.getOutputStream();
            out.setWriteListener(new WriteListener()
            {
                int _w=0;
                
                @Override
                public void onWritePossible() throws IOException

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        @Override
        public void onAllDataRead() throws IOException {
            log.info("onAllDataRead");
            ServletOutputStream output = ctx.getResponse().getOutputStream();
            output.setWriteListener(new WriteListener() {
                @Override
                public void onWritePossible() throws IOException {
                    ServletOutputStream output = ctx.getResponse().getOutputStream();
                    if (output.isReady()) {
                        log.info("Writing [" + body.toString() + "]");

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                sos = connection.getOutputStream();
            } catch (IOException ioe) {
                throw new IllegalStateException(ioe);
            }
            sis.setReadListener(new NoOpReadListener());
            WriteListener wl = new NoOpWriteListener();
            sos.setWriteListener(wl);
            sos.setWriteListener(wl);
        }

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        @Override
        public void onAllDataRead() throws IOException {
            log.info("onAllDataRead");
            ServletOutputStream output = ctx.getResponse().getOutputStream();
            output.setWriteListener(new WriteListener() {
                @Override
                public void onWritePossible() throws IOException {
                    ServletOutputStream output = ctx.getResponse().getOutputStream();
                    if (output.isReady()) {
                        log.info("Writing [" + body.toString() + "]");

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                }
            }


            // Check to see if non-blocking writes or reads are being used
            if (!request.isAsyncDispatching() && request.isAsync()) {
                WriteListener writeListener = res.getWriteListener();
                ReadListener readListener = req.getReadListener();
                if (writeListener != null && status == SocketStatus.OPEN_WRITE) {
                    ClassLoader oldCL = null;
                    try {
                        oldCL = request.getContext().bind(false, null);
                        res.onWritePossible();
                        if (request.isFinished() && req.sendAllDataReadEvent() &&
                                readListener != null) {
                            readListener.onAllDataRead();
                        }
                    } catch (Throwable t) {
                        ExceptionUtils.handleThrowable(t);
                        writeListener.onError(t);
                        throw t;
                    } finally {
                        request.getContext().unbind(false, oldCL);
                    }
                    success = true;

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                }
            }


            // Check to see if non-blocking writes or reads are being used
            if (!request.isAsyncDispatching() && request.isAsync()) {
                WriteListener writeListener = res.getWriteListener();
                ReadListener readListener = req.getReadListener();
                if (writeListener != null && status == SocketStatus.OPEN_WRITE) {
                    ClassLoader oldCL = null;
                    try {
                        oldCL = request.getContext().bind(false, null);
                        res.onWritePossible();
                        if (request.isFinished() && req.sendAllDataReadEvent() &&
                                readListener != null) {
                            readListener.onAllDataRead();
                        }
                    } catch (Throwable t) {
                        ExceptionUtils.handleThrowable(t);
                        writeListener.onError(t);
                        throw t;
                    } finally {
                        request.getContext().unbind(false, oldCL);
                    }
                    success = true;

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                }


              });


              // start output write listener
              out.setWriteListener(new WriteListener() {


                @Override
                public void onWritePossible() throws IOException {


                  try {

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