From f28cedea4263e59b5f8b86f1b41927461fe68ddc Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=E9=82=AA=E5=BD=B1oO?= <213539@qq.com>
Date: Thu, 14 Jan 2021 09:38:10 +0800
Subject: [PATCH] fix #4686 (#4692)

---
 .../main/java/com/alibaba/nacos/api/config/ConfigType.java | 7 ++++++-
 .../nacos/api/config/annotation/NacosConfigListener.java   | 4 ++--
 .../config/annotation/NacosConfigurationProperties.java    | 4 ++--
 3 files changed, 10 insertions(+), 5 deletions(-)

diff --git a/api/src/main/java/com/alibaba/nacos/api/config/ConfigType.java b/api/src/main/java/com/alibaba/nacos/api/config/ConfigType.java
index d70e2a98d8f..cab303b3598 100644
--- a/api/src/main/java/com/alibaba/nacos/api/config/ConfigType.java
+++ b/api/src/main/java/com/alibaba/nacos/api/config/ConfigType.java
@@ -53,7 +53,12 @@ public enum ConfigType {
     /**
      * config type is "yaml".
      */
-    YAML("yaml");
+    YAML("yaml"),
+    
+    /**
+     * not a real type.
+     */
+    UNSET("unset");
     
     String type;
     
diff --git a/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigListener.java b/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigListener.java
index 0025557394a..810833d5928 100644
--- a/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigListener.java
+++ b/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigListener.java
@@ -57,9 +57,9 @@
     /**
      * Nacos Config type.
      *
-     * @return "properties"
+     * @return default value is {@link ConfigType#UNSET}
      */
-    ConfigType type() default ConfigType.PROPERTIES;
+    ConfigType type() default ConfigType.UNSET;
     
     /**
      * Specify {@link NacosConfigConverter Nacos configuraion convertor} class to convert target type instance.
diff --git a/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java b/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java
index 37b6507be89..0e6bc518daa 100644
--- a/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java
+++ b/api/src/main/java/com/alibaba/nacos/api/config/annotation/NacosConfigurationProperties.java
@@ -72,9 +72,9 @@
     /**
      * config style.
      *
-     * @return default value is {@link ConfigType#PROPERTIES}
+     * @return default value is {@link ConfigType#UNSET}
      */
-    ConfigType type() default ConfigType.PROPERTIES;
+    ConfigType type() default ConfigType.UNSET;
     
     /**
      * It indicates the properties of current doBind bean is auto-refreshed when Nacos configuration is changed.