1

dd

2025-12-26 9652bbc4a506f46986e298735b27f281ebf06124

 src/main/java/com/nq/service/impl/StockServiceImpl.java

@@ -40,6 +40,7 @@
import java.text.SimpleDateFormat;
import java.util.*;
import java.util.concurrent.CompletableFuture;
import java.util.concurrent.ConcurrentHashMap;
import javax.annotation.Resource;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
@@ -432,29 +433,109 @@
    }


        /*股票日线-K线*/
    /*股票日线-K线*/
    // 只需要缓存一个最近返回的Object
    // 缓存键类，用于组合多个参数
    private static class CacheKey {
        private final String pid;
        private final String interval;
        private final String stockType;

        public CacheKey(String pid, String interval, String stockType) {
            this.pid = pid;
            this.interval = interval;
            this.stockType = stockType;
        }

        @Override
        public boolean equals(Object o) {
            if (this == o) return true;
            if (o == null || getClass() != o.getClass()) return false;
            CacheKey cacheKey = (CacheKey) o;
            return pid.equals(cacheKey.pid) &&
                    interval.equals(cacheKey.interval) &&
                    stockType.equals(cacheKey.stockType);
        }

        @Override
        public int hashCode() {
            return 31 * pid.hashCode() + 13 * interval.hashCode() + stockType.hashCode();
        }
    }

    private static class CacheEntry {
        Object result;
        long lastExecuteTime;
    }

    // 缓存映射：每个CacheKey对应一个CacheEntry
    private static final Map<CacheKey, CacheEntry> cacheMap = new ConcurrentHashMap<>();
    private static final long MIN_INTERVAL_MS = 3000;

    // 为每个缓存键提供独立的锁对象
    private static final Map<CacheKey, Object> keyLocks = new ConcurrentHashMap<>();

    @Override
    public Object getKData(String pid, String interval, String stockType) {
        try {
            Thread.sleep(3000);
        }catch (Exception e){
            e.printStackTrace();
        CacheKey cacheKey = new CacheKey(pid, interval, stockType);
        long currentTime = System.currentTimeMillis();

        // 1. 先快速检查缓存
        CacheEntry entry = cacheMap.get(cacheKey);
        if (entry != null && (currentTime - entry.lastExecuteTime) < MIN_INTERVAL_MS) {
            return entry.result;
        }

        // 2. 获取该缓存键对应的锁
        Object lock = keyLocks.computeIfAbsent(cacheKey, k -> new Object());

        // 3. 双重检查锁定
        synchronized (lock) {
            currentTime = System.currentTimeMillis();
            entry = cacheMap.get(cacheKey);

            if (entry != null && (currentTime - entry.lastExecuteTime) < MIN_INTERVAL_MS) {
                return entry.result;
            }

            // 4. 获取新数据
            Object newResult = doGetKData(pid, interval, stockType);

            // 5. 更新缓存
            CacheEntry newEntry = new CacheEntry();
            newEntry.result = newResult;
            newEntry.lastExecuteTime = System.currentTimeMillis();
            cacheMap.put(cacheKey, newEntry);

            return newResult;
        }
    }

    private Object doGetKData(String pid, String interval, String stockType) {
        EStockType eStockType = EStockType.getEStockTypeByCode(stockType);
        Object object = HttpUtil.get(eStockType.stockUrl + "kline?pid=" + pid + "&interval=" + interval + "&key=" + eStockType.stockKey);
        Object object = HttpUtil.get(eStockType.stockUrl + "kline?pid=" + pid +
                "&interval=" + interval + "&key=" + eStockType.stockKey);
        Gson gson = new Gson();
        List<kData> dataList = gson.fromJson(object.toString(), new TypeToken<List<kData>>(){}.getType());

        Stock stock = stockMapper.selectOne(new LambdaQueryWrapper<Stock>().eq(Stock::getStockCode, pid).eq(Stock::getStockType, "IN"));
        BigDecimal nowPrice = iPriceServices.getNowPrice(stock.getStockCode());
        Map singleStock = getSingleStock(stock.getStockCode());
        StockVO stockVO = (StockVO)singleStock.get("stock");
        // 修改 List 中的最后一条数据
        kData lastData = dataList.get(dataList.size() - 1);
        lastData.setC(nowPrice.toString());
        lastData.setO(stockVO.getOpen_px());
        lastData.setH(stockVO.getToday_max());
        lastData.setL(stockVO.getToday_min());
        Stock stock = stockMapper.selectOne(new LambdaQueryWrapper<Stock>()
                .eq(Stock::getStockCode, pid)
                .eq(Stock::getStockType, "IN"));

        if (stock != null) {
            BigDecimal nowPrice = iPriceServices.getNowPrice(stock.getStockCode());
            Map singleStock = getSingleStock(stock.getStockCode());
            StockVO stockVO = (StockVO)singleStock.get("stock");

            if (dataList != null && !dataList.isEmpty()) {
                kData lastData = dataList.get(dataList.size() - 1);
                lastData.setC(nowPrice.toString());
                lastData.setO(stockVO.getOpen_px());
                lastData.setH(stockVO.getToday_max());
                lastData.setL(stockVO.getToday_min());
            }
        }

        return gson.toJson(dataList);
    }