1

zj

10 days ago 7d008bf58373926bbdcf67fa7bcf92510f427fb6

 src/main/java/com/nq/utils/redis/RedisKeyUtil.java

@@ -20,7 +20,10 @@
import java.math.BigDecimal;
import java.net.HttpURLConnection;
import java.net.URL;
import java.util.List;
import java.util.Map;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.locks.ReentrantLock;


public class RedisKeyUtil {
@@ -89,60 +92,108 @@
        }
    }

    // 缓存条目类
    private static class CacheEntry {
        String result;
        long lastExecuteTime;

        CacheEntry(String result, long lastExecuteTime) {
            this.result = result;
            this.lastExecuteTime = lastExecuteTime;
        }
    }

    // 按pid存储缓存
    private static final Map<String, CacheEntry> cacheMap = new ConcurrentHashMap<>();

    // 按pid存储锁对象，实现细粒度锁
    private static final Map<String, ReentrantLock> lockMap = new ConcurrentHashMap<>();

    private static final long MIN_INTERVAL_MS = 3000;

    public static String doPost(String pid) {
        // 从配置中获取 API URL，并拼接 key
        String apiUrl = PropertiesUtil.getProperty("JS_IN_HTTP_URL") + "stock?key=" + PropertiesUtil.getProperty("JS_IN_KEY");
        String result = null;
        // 1. 快速检查缓存
        long currentTime = System.currentTimeMillis();
        CacheEntry cached = cacheMap.get(pid);

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

        // 2. 获取该pid对应的锁
        ReentrantLock pidLock = lockMap.computeIfAbsent(pid, k -> new ReentrantLock());

        // 3. 加锁执行
        pidLock.lock();
        try {
            // 4. 双重检查
            currentTime = System.currentTimeMillis();
            cached = cacheMap.get(pid);

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

            // 5. 执行实际请求
            String result = executePostRequest(pid);

            // 6. 更新缓存
            if (result != null) {
                cacheMap.put(pid, new CacheEntry(result, System.currentTimeMillis()));
            } else if (cached != null) {
                // 请求失败，返回旧缓存
                return cached.result;
            }

            return result;

        } finally {
            pidLock.unlock();
        }
    }

    private static String executePostRequest(String pid) {
        String apiUrl = PropertiesUtil.getProperty("JS_IN_HTTP_URL") +
                "stock?key=" + PropertiesUtil.getProperty("JS_IN_KEY");

        try {
            URL url = new URL(apiUrl);
            HttpURLConnection connection = (HttpURLConnection) url.openConnection();

            // 设置请求方法为 POST
            connection.setRequestMethod("POST");
            // 设置请求头
            connection.setRequestProperty("Content-Type", "application/x-www-form-urlencoded");
            connection.setDoOutput(true); // 允许向连接输出
            connection.setDoOutput(true);
            connection.setConnectTimeout(5000);
            connection.setReadTimeout(10000);

            // 构建 POST 数据
            String postData = "pid=" + pid;

            // 发送 POST 请求
            try (OutputStream os = connection.getOutputStream()) {
                byte[] input = postData.getBytes("utf-8");
                os.write(input, 0, input.length);
            }

            // 读取响应
            BufferedReader in = new BufferedReader(new InputStreamReader(connection.getInputStream()));
            String inputLine;
            StringBuffer response = new StringBuffer();
            try (BufferedReader in = new BufferedReader(
                    new InputStreamReader(connection.getInputStream()))) {

            while ((inputLine = in.readLine()) != null) {
                response.append(inputLine);
                StringBuilder response = new StringBuilder();
                String inputLine;
                while ((inputLine = in.readLine()) != null) {
                    response.append(inputLine);
                }

                return response.toString();
            }
            in.close();
            result = response.toString();

        } catch (Exception e) {
            e.printStackTrace();
            return null; // 返回null表示请求失败
        }
        return result;
    }


    public  static  void setCacheCompanies(Stock stock,String companiesInfo){
        RedisShardedPoolUtils.set(RedisKeyConstant.RK_COMPANY_INFO+":"+stock.getStockType()+":"+stock.getStockCode(),
                new Gson().toJson(companiesInfo));
    }


    public static JSONObject getCacheCompanies(Stock stock){
       String  companiesInfo =  RedisShardedPoolUtils.get(RedisKeyConstant.RK_COMPANY_INFO+":"+stock.getStockType()+":"+stock.getStockCode());
       if(companiesInfo.isEmpty()){
           return  null;
       }
       return  JSONObject.parseObject(companiesInfo);
    }



}