Examples of javax.servlet.AsyncContext

javax.servlet.AsyncContext
Class representing the execution context for an asynchronous operation that was initiated on a ServletRequest.
An AsyncContext is created and initialized by a call to {@link ServletRequest#startAsync()} or{@link ServletRequest#startAsync(ServletRequest,ServletResponse)}. Repeated invocations of these methods will return the same AsyncContext instance, reinitialized as appropriate.
In the event that an asynchronous operation has timed out, the container must run through these steps:
1. Invoke, at their {@link AsyncListener#onTimeout onTimeout} method, all{@link AsyncListener} instances registered with the ServletRequeston which the asynchronous operation was initiated.
2. If none of the listeners called {@link #complete} or any of the{@link #dispatch} methods, perform an error dispatch with a status codeequal to HttpServletResponse.SC_INTERNAL_SERVER_ERROR.
3. If no matching error page was found, or the error page did not call {@link #complete} or any of the {@link #dispatch} methods, call{@link #complete}.
@since Servlet 3.0

      /*
      if (_request == null)
        return;
        */
      
      AsyncContext oldContext = _context;
      
      if (_request.isConnectionClosed() || _request.isClosed())
        return;
      
      _context = _request.startAsync();

View Full Code Here

    
    @Override
    public boolean wake()
    {
      if (! _isWake.getAndSet(true)) {
        AsyncContext context = _context;
        
        if (context != null) {
          try {
            context.dispatch();
          } catch (Exception e) {
            log.log(Level.FINER, e.toString(), e);
            
            return false;
          }

View Full Code Here

    }


    @Override
    public void close()
    {
      AsyncContext context = _context;
      _context = null;
      
      if (context != null) {
        context.complete();
      }
    }

View Full Code Here

            context.addListener(this);
        }


        void startAsyncAgain() {
            
            AsyncContext old = context;
            try {
                context = req.startAsync();
                context.addListener(this);
                isComplete = false;
            } catch (IllegalStateException ex) {

View Full Code Here

            } else {
                req.getCookies(); // We have to do this so Tomcat will actually parse the cookies from the request
            }


            req.setAttribute("org.apache.catalina.ASYNC_SUPPORTED", Boolean.TRUE);
            AsyncContext asyncContext = req.startAsync();
            asyncContext.setTimeout(5000);


            bug55772Latch1.countDown();


            PrintWriter writer = asyncContext.getResponse().getWriter();
            writer.print('\n');
            writer.flush();


            bug55772Latch2.countDown();
        }

View Full Code Here

  private static final Logger LOGGER = LoggerFactory.getLogger(DatabaseQueryServlet.class);


  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    resp.setContentType(MEDIATYPE_APPLICATION_JSON);
    AsyncContext asyncContext = req.startAsync();
    int randId = ThreadLocalRandom.current().nextInt(WORLD_LEAST_VALUE, WORLD_BOUND_VALUE+1);
    ListenableFuture<?> future = dao.read(randId);
    addResponseCallback(asyncContext, future, executorService);
  }

View Full Code Here

  private static final Logger LOGGER = LoggerFactory.getLogger(DatabaseQueriesServlet.class);


  @Override
  protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    resp.setContentType(MEDIATYPE_APPLICATION_JSON);
    final AsyncContext asyncContext = req.startAsync();
    ListenableFuture<?> future = dao.read(generateRandomNumbers(getQueries(req.getParameter("queries")),
      WORLD_LEAST_VALUE, WORLD_BOUND_VALUE+1));
    addResponseCallback(asyncContext, future, executorService);
  }

View Full Code Here

            private static final long serialVersionUID = 1L;


            @Override
            protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
            {
                final AsyncContext asyncContext = req.startAsync(req, resp);
                asyncContext.setTimeout(2000);
                asyncContext.start(new Runnable()
                {
                    public void run()
                    {
                        try
                        {
                            // Simulate a long running process...
                            Thread.sleep(1000);


                            HttpServletResponse response = (HttpServletResponse) asyncContext.getResponse();
                            response.setStatus(SC_OK);
                            response.getWriter().printf("Hello Async world!");


                            asyncContext.complete();
                        }
                        catch (InterruptedException e)
                        {
                            Thread.currentThread().interrupt();
                        }

View Full Code Here

            protected void doGet(final HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException
            {
                DispatcherType dispatcherType = req.getDispatcherType();
                if (DispatcherType.REQUEST == dispatcherType)
                {
                    final AsyncContext asyncContext = req.startAsync(req, resp);
                    asyncContext.start(new Runnable()
                    {
                        public void run()
                        {
                            try
                            {
                                // Simulate a long running process...
                                Thread.sleep(1000);


                                asyncContext.getRequest().setAttribute("msg", "Hello Async world!");
                                asyncContext.dispatch();
                            }
                            catch (InterruptedException e)
                            {
                                Thread.currentThread().interrupt();
                            }

View Full Code Here

    private LongRunningService longRunningService;


    @Override
    protected void doGet(HttpServletRequest req, HttpServletResponse resp) {
        // Here the request is put in asynchronous mode
        AsyncContext asyncContext = req.startAsync();


        // This method will return immediately when invoked,
        // the actual execution will run in a separate thread.
        longRunningService.readData(asyncContext);
    }

View Full Code Here

0 1 2 3 4 5 6 7 8 9

TOP

Related Classes of javax.servlet.AsyncContext

async.AsyncStockServlet

co.paralleluniverse.comsat.webactors.servlet.WebActorServlet$HttpChannel

co.paralleluniverse.fibers.servlet.FiberGenericServlet

com.acme.ChatServlet

com.caucho.server.dispatch.CometServletFilterChain$ServletCometController

All source code are property of their respective owners. Java is a trademark of Sun Microsystems, Inc and owned by ORACLE Inc. Contact coftware#gmail.com.