fix:主备切换测试

src/main/java/com/sunyard/util/IpLockUtils.java

@@ -0,0 +1,107 @@
+package com.sunyard.util;
+
+import java.util.concurrent.ConcurrentHashMap;
+import java.util.concurrent.ConcurrentMap;
+import java.util.concurrent.TimeUnit;
+import java.util.concurrent.locks.ReentrantLock;
+
+/**
+ * IP锁工具类 - 高并发安全实现
+ *
+ * 为每个IP地址提供唯一的可重入锁，确保同一IP的操作顺序执行
+ */
+public class IpLockUtils {
+
+    private static final ConcurrentMap<String, ReentrantLock> LOCK_MAP = new ConcurrentHashMap<>();
+
+    private static final Object CREATION_LOCK = new Object();
+
+    /**
+     * 获取IP对应的锁（保证唯一性）
+     * @param ip IP地址
+     * @return 可重入锁实例
+     */
+    public static ReentrantLock getLockForIp(String ip) {
+        ReentrantLock lock = LOCK_MAP.get(ip);
+        if (lock != null) {
+            return lock;
+        }
+
+        synchronized (CREATION_LOCK) {
+            // 双重检查
+            lock = LOCK_MAP.get(ip);
+            if (lock == null) {
+                lock = new ReentrantLock(true); // 公平锁
+                LOCK_MAP.put(ip, lock);
+            }
+            return lock;
+        }
+    }
+
+    /**
+     * 安全加锁（带超时机制）
+     * @param ip IP地址
+     * @param timeout 超时时间
+     * @param unit 时间单位
+     * @return 是否成功获取锁
+     * @throws InterruptedException
+     */
+    public static boolean lockWithTimeout(String ip, long timeout, TimeUnit unit)
+            throws InterruptedException {
+
+        ReentrantLock lock = getLockForIp(ip);
+        return lock.tryLock(timeout, unit);
+    }
+
+    /**
+     * 解锁指定IP的锁
+     * @param ip IP地址
+     */
+    public static void unlockForIp(String ip) {
+        ReentrantLock lock = LOCK_MAP.get(ip);
+        if (lock != null && lock.isHeldByCurrentThread()) {
+            lock.unlock();
+        }
+    }
+
+    /**
+     * 清理未使用的锁（可选）
+     */
+    public static void cleanupUnusedLocks() {
+        LOCK_MAP.entrySet().removeIf(entry ->
+                !entry.getValue().isLocked() &&
+                        entry.getValue().getQueueLength() == 0
+        );
+    }
+
+    /**
+     * 获取当前锁数量
+     */
+    public static int getLockCount() {
+        return LOCK_MAP.size();
+    }
+
+    /**
+     * 获取IP锁状态
+     * @param ip IP地址
+     * @return 锁状态字符串
+     */
+    public static String getLockStatus(String ip) {
+        ReentrantLock lock = LOCK_MAP.get(ip);
+        if (lock == null) {
+            return "No lock exists";
+        }
+
+        return String.format("Locked: %s, Queue: %d, HoldCount: %d",
+                lock.isLocked(), lock.getQueueLength(), lock.getHoldCount());
+    }
+
+    /**
+     * 重置所有锁
+     */
+    public static void reset() {
+        synchronized (CREATION_LOCK) {
+            LOCK_MAP.clear();
+        }
+    }
+}