From bcb620e2b9da85149c464c9909bcdeb5dc56fd3c Mon Sep 17 00:00:00 2001
From: zj <1772600164@qq.com>
Date: Wed, 04 Feb 2026 18:31:50 +0800
Subject: [PATCH] 1
---
src/main/java/com/nq/utils/redis/RedisKeyUtil.java | 109 ++++++++++++++++++++++++++++++++++++++++--------------
1 files changed, 80 insertions(+), 29 deletions(-)
diff --git a/src/main/java/com/nq/utils/redis/RedisKeyUtil.java b/src/main/java/com/nq/utils/redis/RedisKeyUtil.java
index 7e53315..731b0bb 100644
--- a/src/main/java/com/nq/utils/redis/RedisKeyUtil.java
+++ b/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);
- }
-
-
-
}
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