Examples of javax.servlet.AsyncContext.addListener()

javax.servlet.AsyncContext.addListener()
Registers the given {@link AsyncListener} with the most recentasynchronous cycle that was started by a call to one of the {@link ServletRequest#startAsync} methods.
The given AsyncListener will receive an {@link AsyncEvent} whenthe asynchronous cycle completes successfully, times out, or results in an error.
AsyncListener instances will be notified in the order in which they were added. @param listener the AsyncListener to be registered @throws IllegalStateException if this method is called afterthe container-initiated dispatch, during which one of the {@link ServletRequest#startAsync} methods was called, hasreturned to the container

                TestAsyncContextImpl.track("TimeoutServletGet-");
                final AsyncContext ac = req.startAsync();
                ac.setTimeout(ASYNC_TIMEOUT);


                if (completeOnTimeout != null) {
                    ac.addListener(new TrackingListener(false,
                            completeOnTimeout.booleanValue(), dispatchUrl));
                }
            } else {
                resp.getWriter().print("FAIL: Async unsupported");
            }

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            final int iter = Integer.parseInt(req.getParameter(ITER_PARAM)) - 1;
            final AsyncContext ctxt = req.startAsync();
            if (addTrackingListener) {
                TrackingListener listener =
                    new TrackingListener(completeOnError, true, null);
                ctxt.addListener(listener);
            }
            Runnable run = new Runnable() {
                @Override
                public void run() {
                    if (iter > 0) {

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            final boolean first = TrackingServlet.first;
            TrackingServlet.first = false;


            final AsyncContext ctxt = req.startAsync();
            TrackingListener listener = new TrackingListener(false, true, null);
            ctxt.addListener(listener);
            ctxt.setTimeout(3000);


            Runnable run = new Runnable() {
                @Override
                public void run() {

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                throws ServletException, IOException {


            final AsyncContext asyncContext =
                request.startAsync(request, response);


            asyncContext.addListener(new TrackingListener(false, false, null));


            asyncContext.start(new Runnable() {


                @Override
                public void run() {

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        protected void doGet(HttpServletRequest req, HttpServletResponse resp)
                throws ServletException, IOException {


            req.getParameter(PARAM_NAME);
            AsyncContext actxt = req.startAsync();
            actxt.addListener(new Bug54178AsyncListener());
            actxt.complete();
        }
    }


    private static class Bug54178ServletB extends HttpServlet {

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        System.out.println("====filter servlet 1  before");


        final AsyncContext asyncContext = req.startAsync();
        asyncContext.setTimeout(10L * 1000);
        asyncContext.addListener(new AsyncListener() {
            @Override
            public void onComplete(final AsyncEvent event) throws IOException {
                System.out.println("=====async complete");
            }

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        System.out.println("====filter servlet 2  before");


        final AsyncContext asyncContext = req.startAsync();
        asyncContext.setTimeout(10L * 1000);
        asyncContext.addListener(new AsyncListener() {
            @Override
            public void onComplete(final AsyncEvent event) throws IOException {
                System.out.println("=====async complete");
            }

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    @Override
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
        final AsyncContext asyncContext = req.startAsync();
        asyncContext.setTimeout(10 * 1000);
        asyncContext.addListener(new AsyncListener() {
            @Override
            public void onComplete(final AsyncEvent event) throws IOException {
                System.out.println("=====async complete");
            }

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            usernameToAsyncContextMap.put(username, queue);
        }


        queue.add(asyncContext);


        asyncContext.addListener(new AsyncListener() {
            @Override
            public void onComplete(final AsyncEvent event) throws IOException {
                Queue<AsyncContext> queue = usernameToAsyncContextMap.get(username);
                if(queue != null) {
                    queue.remove(event.getAsyncContext());

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    @Override
    protected void doGet(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
        final AsyncContext asyncContext = req.startAsync();
        asyncContext.setTimeout(2 * 1000);
        asyncContext.addListener(new AsyncListener() {
            @Override
            public void onComplete(final AsyncEvent event) throws IOException {
                System.out.println("=====async complete");
            }

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