From c6cc72986a17fb5729b984a3e0a8ec76e96b3934 Mon Sep 17 00:00:00 2001
From: 2881099 <2881099@users.noreply.github.com>
Date: Tue, 6 May 2025 14:59:22 +0800
Subject: [PATCH] =?UTF-8?q?Updated=20=E8=AF=BB=E5=86=99=E5=88=86=E7=A6=BB?=
 =?UTF-8?q?=20(markdown)?=
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---
 读写分离.md | 37 +++++++++++++++++++++++++++++++++++++
 1 file changed, 37 insertions(+)

diff --git a/读写分离.md b/读写分离.md
index 7ec4088..e38e24d 100644
--- a/读写分离.md
+++ b/读写分离.md
@@ -28,6 +28,43 @@ fsql.Select<T>().Master().WhereId(a => a.Id == 1).ToOne(); //强制读【主库
 fsql.Ado.Query<T>("/*master*/ select * from t where ..."); //强制读【主库】
 ```
 
+## 使用 FreeSqlCloud 另一种读写分离
+
+```csharp
+public enum DbEnum { db1, db2, db3 }
+
+var fsql = new FreeSqlCloud();
+
+fsql.Register(DbEnum.db3, () => new FreeSqlBuilder()
+    .UseConnectionString(DataType.Sqlite, @"Data Source=:memory:;max pool size=1")
+    .UseAutoSyncStructure(true).Build());
+fsql.Register(DbEnum.db2, () => new FreeSqlBuilder()
+    .UseConnectionString(DataType.Sqlite, @"Data Source=:memory:;max pool size=2")
+    .UseAutoSyncStructure(true).Build());
+fsql.Register(DbEnum.db1, () => new FreeSqlBuilder()
+    .UseConnectionString(DataType.Sqlite, @"Data Source=:memory:;max pool size=3")
+    .UseAutoSyncStructure(true).Build());
+
+fsql.EntitySteering = (_, e) =>
+{
+    switch (e.MethodName)
+    {
+        case "Select":
+            if (e.DBKey == DbEnum.db1) //判断主库时
+            {
+                var dbkeyIndex = new Random().Next(0, e.AvailableDBKeys.Length);
+                e.DBKey = e.AvailableDBKeys[dbkeyIndex]; //重新定向到其他 db
+            }
+            break;
+        case "Insert":
+        case "Update":
+        case "Delete":
+        case "InsertOrUpdate":
+            break;
+    }
+};
+```
+
 ## 参考资料
 
 - [《数据库事务》](%e4%ba%8b%e5%8a%a1)