61、springmvc-异步请求-返回DeferredResult

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61.1 DeferredResult 官方文案

61.2 使用

/**

 * 创建订单加入 订单处理队列

 *

 * @return

 */

@ResponseBody

@RequestMapping("/createOrder")

public DeferredResult<Object> createOrder() {

    // 超时间  10秒钟

    DeferredResult<Object> deferredResult = new DeferredResult<Object>(10 * 1000L, "create order error");

    DeferredResultQueue.save(deferredResult);

    return deferredResult;

}

/**

 * 另外一个线程 从队列中读取 订单任务 开始创建 ，并返回结果

 *

 * @return

 */

@ResponseBody

@RequestMapping("/create")

public String create() {

    String uuid = UUID.randomUUID().toString();

    DeferredResult deferredResult = DeferredResultQueue.get();

    deferredResult.setResult(uuid);

    return "success===>>>> " + uuid;

}

创建一个 DeferredResultQueue 队列

public class DeferredResultQueue {

    private static Queue<DeferredResult<Object>> queue = new ConcurrentLinkedQueue<DeferredResult<Object>>();

    public static void save(DeferredResult<Object> object) {

        queue.add(object);

    }

    public static DeferredResult<Object> get() {

        return queue.poll();

    }

}