ConcurrentLinkedQueue数字货币钱包使用案例

 

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package cc.zeelan.resources.helper.queue;   import java.util.Iterator; import java.util.concurrent.ConcurrentLinkedQueue;   import org.springframework.scheduling.annotation.Scheduled; import org.springframework.stereotype.Component;   import cc.zeelan.resources.om.transaction.TranctionOrder; import cn.hutool.core.lang.Validator; import cn.hutool.core.thread.ThreadUtil; import cn.hutool.core.util.ObjectUtil; import cn.hutool.http.HttpRequest; import cn.hutool.http.HttpResponse; import cn.hutool.json.JSONUtil;   /**  * 队列推送订单通知  */ @Component public class QueueNotifyHelper {     /**      * 推送请求最大请求错误超过5次,则抛弃该推送      */     private static final int max_counter = 5;     /**      * 请求超时      */     private static final int time_out = 3000;     /**      * 该队列是一个基于链接节点的无界线程安全队列，它采用先进先出的规则对节点进行排序      */     private static ConcurrentLinkedQueue<TranctionOrder> queue = new ConcurrentLinkedQueue<TranctionOrder>();       /**      * 添加到队列      */     public static void offer(TranctionOrder order) {         queue.offer(order);     }       @Scheduled(cron = "0/5 * * * * ?")     public void push() {         Iterator<TranctionOrder> iterator = queue.iterator();         while (iterator.hasNext()) {             TranctionOrder queueOrder = iterator.next();             if (ObjectUtil.isNotNull(queueOrder) && Validator.isUrl(queueOrder.getNotifyUrl())) {// 当队列元素不为空                 ThreadUtil.execAsync(new Runnable() {// 防止远程推送请求,队列阻塞                     @Override                     public void run() {                         notifyService(queueOrder.getNotifyUrl(), queueOrder);                     }                 });             }         }     }       /**      * 推送服务      *      * @see 因为线程,可能会超出max_counter的数量,但不影响后续业务,所以不需要加锁      * @param notifyUrl 通知URL      * @param order     预支付订单      */     private void notifyService(String notifyUrl, TranctionOrder order) {         HttpResponse r = HttpRequest.post(notifyUrl).body(JSONUtil.toJsonStr(order)).timeout(time_out).execute().sync();         if (r.isOk()) {// 当请求成功之后,从队列当中移出该元素             queue.remove(order);         } else {// 请求失败,放回队列进行补偿操作             order.setCounter(Math.addExact(order.getCounter(), 1));             if (order.getCounter() > max_counter) {// 当错误超过五次,则放弃推送,                 queue.remove(order);             } else {// 添加到队列,继续推送                 offer(order);             }         }     } }