Example usage for org.springframework.web.context.request.async DeferredResult DeferredResult

Introduction

In this page you can find the example usage for org.springframework.web.context.request.async DeferredResult DeferredResult.

Prototype

public DeferredResult(@Nullable Long timeoutValue, Supplier<?> timeoutResult) 

Source Link

Document

Variant of #DeferredResult(Long,Object) that accepts a dynamic fallback value based on a Supplier .

Usage

From source file:com.sishuok.chapter3.web.controller.chat.MsgPublisher.java

public DeferredResult<String> startAsync(final String username) {
    final DeferredResult<String> result = new DeferredResult<String>(30L * 1000, null);

    final Runnable removeDeferredResultRunnable = new Runnable() {
        @Override// w  ww  . j av  a2  s . co m
        public void run() {
            Queue<DeferredResult<String>> queue = usernameToDeferredResultMap.get(username);
            if (queue != null) {
                queue.remove(result);
            }
        }
    };
    result.onCompletion(removeDeferredResultRunnable);
    result.onTimeout(removeDeferredResultRunnable);

    //????
    Queue<DeferredResult<String>> queue = usernameToDeferredResultMap.get(username);
    if (queue == null) {
        queue = new ConcurrentLinkedDeque();
        usernameToDeferredResultMap.put(username, queue);
    }
    queue.add(result);

    return result;
}

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From source file:siddur.solidtrust.image.ImageController.java

@RequestMapping(value = "/api/images")
public @ResponseBody DeferredResult<Object> findCarImages(final @RequestParam("id") String id,
        HttpServletRequest request) {// w w w . ja  v a  2s. c  om
    final String ip = request.getRemoteHost();
    final String username = request.getAttribute(SolidtrustConstants.CLIENT_ID) + "";
    final int port = request.getLocalPort();
    final String address = request.getLocalAddr();

    final DeferredResult<Object> result = new DeferredResult<>(2000L, "no data");
    log4j.info("Id=" + id + " ,Remaining: " + suspendedImageRequests.remainingCapacity());
    try {
        suspendedImageRequests.add(result);
    } catch (Exception e1) {
        result.setResult("Image service is overload");
        return result;
    }
    result.onCompletion(new Runnable() {

        @Override
        public void run() {
            suspendedImageRequests.remove(result);
        }
    });

    new Thread(new Runnable() {

        @Override
        public void run() {
            AccessItem ai = new AccessItem();
            ai.setIp(ip);
            ai.setUsername(username);
            ai.setService(Product.IMAGES.getId());
            ai.setRequest(id);

            ImageProduct ip = null;
            try {
                ip = findImagesByLicensePlate(id);
            } catch (Exception e) {
                ai.setStatus(-1);
                log4j.error(e.getMessage(), e);
                ai.setResponse(e.getMessage());
                free.save(ai);
                return;
            }

            if (ip == null) {
                ai.setStatus(-1);
                ai.setResponse("Not found:" + id);
                free.save(ai);
                return;
            }

            ai.setResponse(ip.getId() + "");
            free.save(ai);

            ImageProduct resp = addPrefix(port, address, ip);
            result.setResult(resp);

        }
    }).start();

    return result;
}

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