新增租户初始化切面事件

yudao-framework/yudao-spring-boot-starter-biz-tenant/src/main/java/cn/iocoder/yudao/framework/tenant/core/context/TenantContextHolder.java

@@ -2,6 +2,8 @@ package cn.iocoder.yudao.framework.tenant.core.context;
 
 import com.alibaba.ttl.TransmittableThreadLocal;
 
+import java.util.function.Supplier;
+
 /**
  * 多租户上下文 Holder
  *
@@ -58,6 +60,16 @@ public class TenantContextHolder {
         return Boolean.TRUE.equals(IGNORE.get());
     }
 
+    public static <T> T apply(Long tenantId, Supplier<T> func){
+        Long oldTenant = TenantContextHolder.getTenantId();
+        try {
+            TenantContextHolder.setTenantId(tenantId);
+            return func.get();
+        }finally {
+            TenantContextHolder.setTenantId(oldTenant);
+        }
+    }
+
     public static void clear() {
         TENANT_ID.remove();
         IGNORE.remove();