Java Code Examples for javax.servlet.http.HttpServletRequest#startAsync()

@Override
protected void handleSuccess(HttpServletRequest request, HttpServletResponse response,
		UpgradeInfo upgradeInfo, TyrusUpgradeResponse upgradeResponse) throws IOException, ServletException {

	response.setStatus(upgradeResponse.getStatus());
	upgradeResponse.getHeaders().forEach((key, value) -> response.addHeader(key, Utils.getHeaderFromList(value)));

	AsyncContext asyncContext = request.startAsync();
	asyncContext.setTimeout(-1L);

	Object nativeRequest = getNativeRequest(request);
	BeanWrapper beanWrapper = new BeanWrapperImpl(nativeRequest);
	Object httpSocket = beanWrapper.getPropertyValue("connection.connectionHandler.rawConnection");
	Object webSocket = webSocketHelper.newInstance(request, httpSocket);
	webSocketHelper.upgrade(webSocket, httpSocket, request.getServletContext());

	response.flushBuffer();

	boolean isProtected = request.getUserPrincipal() != null;
	Writer servletWriter = servletWriterHelper.newInstance(webSocket, isProtected);
	Connection connection = upgradeInfo.createConnection(servletWriter, noOpCloseListener);
	new BeanWrapperImpl(webSocket).setPropertyValue("connection", connection);
	new BeanWrapperImpl(servletWriter).setPropertyValue("connection", connection);
	webSocketHelper.registerForReadEvent(webSocket);
}
 

@Override
protected void doGet(HttpServletRequest request,
        HttpServletResponse response)
        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() {
            try {
                Thread.sleep(THREAD_SLEEP_TIME);
                TestAsyncContextImpl.track("Runnable-");
                asyncContext.complete();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}
 

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {

    resp.setContentType("text/plain");
    resp.setCharacterEncoding("UTF-8");

    // Non-blocking IO requires async
    AsyncContext ac = req.startAsync();

    // Use a single listener for read and write. Listeners often need to
    // share state to coordinate reads and writes and this is much easier as
    // a single object.
    @SuppressWarnings("unused")
    CounterListener listener = new CounterListener(
            ac, req.getInputStream(), resp.getOutputStream());
}
 

@Override
protected void doPost(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {

    resp.setContentType("text/plain");
    resp.setCharacterEncoding("UTF-8");

    // Non-blocking IO requires async
    AsyncContext ac = req.startAsync();

    // Use a single listener for read and write. Listeners often need to
    // share state to coordinate reads and writes and this is much easier as
    // a single object.
    @SuppressWarnings("unused")
    CounterListener listener = new CounterListener(
            ac, req.getInputStream(), resp.getOutputStream());
}
 

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

    resp.setContentType("text/plain");
    resp.setCharacterEncoding("UTF-8");

    // Non-blocking IO requires async
    AsyncContext ac = req.startAsync();

    // Use a single listener for read and write. Listeners often need to
    // share state to coordinate reads and writes and this is much easier as
    // a single object.
    @SuppressWarnings("unused")
    NumberWriterListener listener = new NumberWriterListener(
            ac, req.getInputStream(), resp.getOutputStream());

}
 

public HttpRequestDispatch(JDiscContext jDiscContext,
                           AccessLogEntry accessLogEntry,
                           Context metricContext,
                           HttpServletRequest servletRequest,
                           HttpServletResponse servletResponse) throws IOException {
    this.jDiscContext = jDiscContext;

    requestHandler = newRequestHandler(jDiscContext, accessLogEntry, servletRequest);

    this.jettyRequest = (Request) servletRequest;
    this.metricReporter = new MetricReporter(jDiscContext.metric, metricContext, jettyRequest.getTimeStamp());
    this.servletResponseController = new ServletResponseController(
            servletRequest,
            servletResponse,
            jDiscContext.janitor,
            metricReporter,
            jDiscContext.developerMode());
    markConnectionAsNonPersistentIfThresholdReached(servletRequest);
    this.async = servletRequest.startAsync();
    async.setTimeout(0);
    metricReporter.uriLength(jettyRequest.getOriginalURI().length());
}
 

@Override
protected void doGet(HttpServletRequest req,
        final HttpServletResponse resp)
        throws ServletException, IOException {
    final AsyncContext ctx = req.startAsync();
    ctx.start(new Runnable() {
        @Override
        public void run() {
            try {
                Thread.sleep(THREAD_SLEEP_TIME);
                resp.setHeader("A", "xyz");
                resp.setContentType("text/plain");
                resp.setContentLength("OK".getBytes().length);
                resp.getWriter().print("OK");
                ctx.complete();
            } catch (Exception e) {
                e.printStackTrace();
            }
        }
    });
}
 

@Override
protected void service(final HttpServletRequest request, final HttpServletResponse response)
        throws ServletException, IOException {
    URI rewrittenURI = this.rewriteURI(request);

    if (this._isDebugEnabled) {
        StringBuffer uri = request.getRequestURL();
        if (request.getQueryString() != null)
            uri.append("?").append(request.getQueryString());
        this._log.debug("{} rewriting: {} -> {}", getRequestId(request), uri, rewrittenURI);
    }

    if (rewrittenURI == null) {
        response.sendError(HttpServletResponse.SC_FORBIDDEN);
        return;
    }

    AsyncContext asyncContext = request.startAsync();
    // We do not timeout the continuation, but the proxy request
    asyncContext.setTimeout(0);
    request.setAttribute(ASYNC_CONTEXT, asyncContext);

    ProxyRequestHandler proxyRequestHandler = new ProxyRequestHandler(request, response, rewrittenURI);
    proxyRequestHandler.send();
}
 

@Override
protected void doGet(HttpServletRequest request, HttpServletResponse response)
        throws ServletException, IOException {
    boolean notify = Boolean.parseBoolean(request.getParameter("notify"));
    AsyncContext ctx = request.startAsync();
    ctx.setTimeout(1000);
    if (!notify) {
        emitters.add(new Emitter(ctx));
        latch.countDown();
    } else {
        for (Emitter e : emitters) {
            e.emit();
        }
        response.getOutputStream().println("OK");
        response.getOutputStream().flush();
        ctx.complete();
    }
}
 

@Override
public void start(long timeout) {
	Assert.state(!isCompleted(), "Async processing has already completed");
	if (isStarted()) {
		return;
	}

	HttpServletRequest servletRequest = this.request.getServletRequest();
	HttpServletResponse servletResponse = this.response.getServletResponse();

	this.asyncContext = servletRequest.startAsync(servletRequest, servletResponse);
	this.asyncContext.addListener(this);

	if (timeout != NO_TIMEOUT_VALUE) {
		this.asyncContext.setTimeout(timeout);
	}
}
 

protected void doGetInternal(HttpServletRequest request, HttpServletResponse response) {
    logger.info("Async endpoint hit");
    AsyncContext asyncContext = request.startAsync(request, response);

    executor.execute(runnableWithTracing(() -> {
        try {
            logger.info("Async endpoint async logic");
            sleepThread(SLEEP_TIME_MILLIS);
            asyncContext.getResponse().getWriter().print(ASYNC_RESULT);
            asyncContext.complete();
        }
        catch (IOException e) {
            throw new RuntimeException(e);
        }
    }));
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    if (bug55772IsSecondRequest) {
        Cookie[] cookies = req.getCookies();
        if (cookies != null && cookies.length > 0) {
            for (Cookie cookie : req.getCookies()) {
                if (cookie.getName().equalsIgnoreCase("something.that.should.not.leak")) {
                    bug55772RequestStateLeaked = true;
                }
            }
        }
        bug55772Latch3.countDown();
    } 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();
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp)
        throws ServletException, IOException {
    TestAsyncContextImpl.track("DispatchingServletGet-");
    resp.flushBuffer();

    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() {
            if (first) {
                ctxt.dispatch("/stage1");
            } else {
                ctxt.dispatch("/stage2");
            }
        }
    };
    if ("y".equals(req.getParameter("useThread"))) {
        new Thread(run).start();
    } else {
        run.run();
    }
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    final AsyncContext ac = req.startAsync(req, new TestAsyncRespWrapper(resp));
    ac.start(new Runnable() {
        @Override
        public void run() {
            ac.dispatch("/message");
        }
    });
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException,
		IOException {
	final AsyncContext async = req.startAsync();
	final ServletOutputStream out = resp.getOutputStream();
	LOGGER.debug("plaintext async start");
	resp.setContentType(Helper.MEDIATYPE_TEXT_PLAIN);

	out.setWriteListener(new WriteListener() {
		@Override
		public void onWritePossible() throws IOException {
			byte[] buffer = new byte[32];
			ByteArrayInputStream is = new ByteArrayInputStream(Helper.CONTENT);

			while (out.isReady()) {
				int len = is.read(buffer);

				if (len < 0) {
					async.complete();
					LOGGER.debug("plaintext async end");
					return;
				}
				out.write(buffer, 0, len);
			}
		}

		@Override
		public void onError(Throwable t) {
			LOGGER.error("plaintext async error", t);
			async.complete();
		}
	});
}
 

@Override
protected void doGet(HttpServletRequest req, HttpServletResponse resp) throws ServletException, IOException {
    req.setAttribute("org.apache.catalina.ASYNC_SUPPORTED", true);
    AsyncContext aCtx = req.startAsync(req, resp);
    addLoggingListenerToCtx(aCtx);

    ServletInputStream inputStream = req.getInputStream();
    byte[] streamContent = IOUtils.toByteArray(inputStream);
    inputStream.close();

    String reqUrl = req.getRequestURL().toString();
    String baseUrl = reqUrl.replace(req.getContextPath() + "//", req.getContextPath() + "/");
    String url = baseUrl.replace(req.getContextPath(), "")
            .replace(String.valueOf(req.getLocalPort()),
                    String.valueOf(vertxConfig.getInteger("httpPort")));


    HttpClientRequest request = httpClient.request(HttpMethod.GET, url, httpClientResponse -> {
        httpClientResponse.exceptionHandler(exception -> {
            log("Error occurred", exception.getCause());
        });

        httpClientResponse.bodyHandler(body -> {
            try {
                final PrintWriter writer = aCtx.getResponse().getWriter();
                writer.write(body.toString());
                writer.flush();
                writer.close();
                aCtx.complete();
            } catch (IOException e) {
                log("Error occurred", e);
            }
        });
    });

    request.putHeader("Content-Type", req.getHeader("Content-Type"));
    request.setChunked(false);
    request.end(Buffer.buffer(streamContent));
}
 

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

    resp.setContentType("text/plain;UTF-8");

    asyncContext = req.startAsync();
    // This will commit the response
    asyncContext.complete();
}
 

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

    AsyncContext actxt = req.startAsync();
    resp.setStatus(status);
    actxt.complete();
}
 

@Override
protected void doPost(final HttpServletRequest req, final HttpServletResponse resp) throws ServletException, IOException {
    final AsyncContext asyncContext = req.startAsync();
    asyncContext.start(new Runnable() {
        @Override
        public void run() {
            final Log4jWebSupport webSupport =
                WebLoggerContextUtils.getWebLifeCycle(TestAsyncServlet.this.getServletContext());
            webSupport.setLoggerContext();
            // do stuff
            webSupport.clearLoggerContext();
        }
    });
}
 

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

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