diff --git a/graal/pom.xml b/graal/pom.xml
index 4b2f9bfe..4545a77b 100644
--- a/graal/pom.xml
+++ b/graal/pom.xml
@@ -18,7 +18,7 @@
     <parent>
         <groupId>org.springframework.boot</groupId>
         <artifactId>spring-boot-starter-parent</artifactId>
-        <version>3.2.1</version>
+        <version>3.2.3</version>
         <relativePath/> <!-- lookup parent from repository -->
     </parent>
     <groupId>io.sixwaaaay</groupId>
diff --git a/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContext.java b/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContext.java
index 9d0f8199..3b58c030 100644
--- a/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContext.java
+++ b/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContext.java
@@ -13,14 +13,32 @@
 
 package io.sixwaaaay.sharingcomment.util;
 
+/**
+ * DbContext is a thread local variable which is used to determine
+ * whether the current operation is a read or write operation.
+ */
 public class DbContext {
+    /**
+     * Thread local variable to store the current context.
+     * default value is WRITE.
+     */
     private static final ThreadLocal<DbContextEnum> CONTEXT = ThreadLocal.withInitial(() -> DbContextEnum.WRITE);
 
 
+    /**
+     * Set the current context.
+     *
+     * @param context the context to set.
+     */
     public static void set(DbContextEnum context) {
         CONTEXT.set(context);
     }
 
+    /**
+     * Get the current context.
+     *
+     * @return the current context.
+     */
     public static DbContextEnum get() {
         return CONTEXT.get();
     }
diff --git a/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContextEnum.java b/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContextEnum.java
index 3d27cd2d..5432c2a6 100644
--- a/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContextEnum.java
+++ b/graal/src/main/java/io/sixwaaaay/sharingcomment/util/DbContextEnum.java
@@ -13,6 +13,16 @@
 
 package io.sixwaaaay.sharingcomment.util;
 
+/**
+ * Enum for database context
+ */
 public enum DbContextEnum {
-    READ, WRITE
+    /**
+     * indicate replica-datasource
+     */
+    READ,
+    /**
+     * indicate default-datasource
+     */
+    WRITE,
 }