需求場(chǎng)景

(Delay)代碼需要延時(shí)執(zhí)行,(Queue)需要不斷失敗重試

實(shí)例

當(dāng)前時(shí)間延時(shí)5s執(zhí)行Task,并在Task中添加一個(gè)指定時(shí)間執(zhí)行的延時(shí)隊(duì)列

try { 
     //第一個(gè)參數(shù): 延時(shí)任務(wù)中需要使用的參數(shù)對(duì)象,
     //第二個(gè)參數(shù): 傳入new Date()作為延時(shí)的基準(zhǔn)時(shí)間 
     DelayGetPrise delay = new DelayGetPrise(asset, new Date());
     GetOpenPriseTask.addtask(delay);
} catch (Exception e) {
     e.printStackTrace();
}

/**
 * @Auther: Young
 * @Date: 2019/4/13 10:28
 * @Description:
 */
@Data
public class DelayGetPrise  implements Delayed {

    public DelayGetPrise(Asset asset, Date endDate)
    {
        this.asset = asset;
        this.endDate = endDate.getTime();
    }

    private long endDate;

    private Asset asset;  //獲取的時(shí)間

    @Override
    //調(diào)用處傳入時(shí)間的基礎(chǔ)上延時(shí) 5s鐘后執(zhí)行task
    public long getDelay(TimeUnit unit) {
        return (endDate + 5000) - System.currentTimeMillis();
    }

    @Override
    public int compareTo(Delayed o) {
        DelayGetPrise jia = (DelayGetPrise) o;
        if (this.endDate - jia.getEndDate() > 0)
            //時(shí)間到達(dá)
            return 1;
        else
            return 0;
    }
}

/**
 * @Auther: Young
 * @Date: 2019/4/13 10:27
 * @Description:該方法繼承AfterSpringLoaded,項(xiàng)目啟動(dòng)后就加載Task,初始化隊(duì)列等
 */
@Component
public class GetOpenPriseTask implements AfterSpringLoaded {

    private static final Logger logger = LoggerFactory.getLogger(GetOpenPriseTask.class);

    @Autowired
    private AssetService assetService;

    @Autowired
    private MarketService marketService;

    private static final BlockingQueue<DelayGetPrise> getOpenPriseQueue = new DelayQueue<DelayGetPrise>();

    public static void addtask(DelayGetPrise dalay) {
        getOpenPriseQueue.add(dalay);
    }

    @Override
    public void load() {
        while (true) {
            try {
                logger.info("task任務(wù) 開(kāi)始");
                DelayGetPrise prise = getOpenPriseQueue.take();
                try {
                    Asset asset = prise.getAsset();
                    ...
                    //失敗重試
                    if (失敗) {
                        logger.error("Task任務(wù) 數(shù)據(jù)異常,重試");
                        //注意此處傳入的時(shí)間
                        DelayGetPrise newDelay = new DelayGetPrise(asset, new Date());
                        GetOpenPriseTask.addtask(newDelay);
                        //此處不能用break,否則會(huì)跳出while(true),關(guān)閉隊(duì)列
                        continue;
                    } else {
                        logger.info("Task任務(wù) 正常邏輯執(zhí)行");
                        ...
                        logger.info("Task任務(wù)完成");

                        LFExcuter.excute(() -> {
                             try {
                                  //指定時(shí)間延時(shí)Task
                                  int delay = asset.getPeriodValue().multiply(new BigDecimal(6)).intValue();
                                  Calendar calUp = Calendar.getInstance();
                                  int delaysecond = RandomUtil.randomInt(delay + 1);
                                  calUp.add(Calendar.SECOND, delaysecond);
                                  logger.info("指定時(shí)間：delay: " + delaysecond + "秒");
                                  //在計(jì)算好的時(shí)間基礎(chǔ)上延時(shí)
                                  DelayAutoBuy delayAutoUp = new DelayAutoBuy(asset, calUp.getTime(), ExchangeConstant.ORDER_TYPE.UP);
                                  AutoBuyTask.addtask(delayAutoUp);
                                } catch (Exception e) {
                                    logger.error("指定時(shí)間Task任務(wù)", e);
                                }
                            });
                        }
                } catch (Exception e) {
                    logger.error("獲取隊(duì)列錯(cuò)誤,重試Task任務(wù)", e);
                    GetOpenPriseTask.addtask(prise);
                }
            } catch (Exception e) {
                logger.error("指定時(shí)間Task任務(wù) 異常:", e);
            }
            logger.info("Task任務(wù) 結(jié)束");
        }
    }
}