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albumenj pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/dubbo-samples.git


The following commit(s) were added to refs/heads/master by this push:
     new 2154592df Improve some code according to code specification (#1191)
2154592df is described below

commit 2154592df47d94cac6cb2c82503ea28cf2576bec
Author: po-168 <[email protected]>
AuthorDate: Thu Nov 14 15:02:06 2024 +0800

    Improve some code according to code specification (#1191)
---
 .../samples/tri/unary/DubboGreeterTriple.java      |  1 +
 .../dubbo/samples/tri/unary/GreeterReply.java      | 32 ++++++++++++++++------
 .../dubbo/samples/tri/unary/GreeterRequest.java    | 32 ++++++++++++++++------
 .../dubbo/samples/tri/unary/GreeterImpl.java       |  1 +
 .../springboot/demo/idl/DubboGreeterTriple.java    |  1 +
 .../dubbo/springboot/demo/idl/GreeterReply.java    | 32 ++++++++++++++++------
 .../dubbo/springboot/demo/idl/GreeterRequest.java  | 32 ++++++++++++++++------
 .../springboot/demo/idl/DubboGreeterTriple.java    |  1 +
 .../dubbo/springboot/demo/idl/GreeterReply.java    | 32 ++++++++++++++++------
 .../dubbo/springboot/demo/idl/GreeterRequest.java  | 32 ++++++++++++++++------
 .../dubbo/samples/frontend/ShopServiceImpl.java    |  1 +
 .../dubbo/samples/frontend/ShopServiceImpl.java    |  1 +
 .../impl/AnnotationGreetingServiceImpl.java        |  1 +
 .../impl/AnnotationHelloServiceImpl.java           |  1 +
 .../samples/attachment/impl/AttachmentImpl.java    |  1 +
 .../dubbo/samples/docker/DemoServiceImpl.java      |  1 +
 .../apisix.dubbo/provider/DemoServiceImpl.java     |  1 +
 .../samples/group/provider/GroupAServiceImpl.java  |  1 +
 .../samples/group/provider/GroupBServiceImpl.java  |  1 +
 .../dubbo/samples/local/impl/DemoServiceImpl.java  |  1 +
 .../dubbo/samples/mock/api/DemoServiceMock.java    |  1 +
 .../samples/mock/provider/DemoServiceImpl.java     |  1 +
 .../dubbo/registry/provider/DemoServiceImpl.java   |  1 +
 .../nativeimage/provider/DemoServiceImpl.java      |  1 +
 .../dubbo/samples/basic/impl/DemoServiceImpl.java  |  1 +
 .../samples/basic/spi/CompatibleProtocol.java      |  2 ++
 .../rest/api/extension/ClientTraceFilter.java      |  2 ++
 .../rest/api/extension/CustomExceptionMapper.java  |  1 +
 .../samples/rocketmq/impl/DemoServiceImpl.java     |  1 +
 .../dubbo/sample/tri/pojo/PojoGreeterImpl.java     |  1 +
 .../multi/registry/impl/DemoServiceImpl.java       |  1 +
 .../multi/registry/impl/HelloServiceImpl.java      |  1 +
 .../samples/impl/AnnotatedGreetingService.java     |  1 +
 .../samples/impl/AnnotatedGreetingService1.java    |  1 +
 .../samples/impl/AnnotatedGreetingService2.java    |  1 +
 .../samples/impl/AnnotatedGreetingService.java     |  1 +
 .../samples/impl/AnnotatedGreetingService.java     |  1 +
 37 files changed, 171 insertions(+), 54 deletions(-)

diff --git 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/DubboGreeterTriple.java
 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/DubboGreeterTriple.java
index 0bff5a049..1459d0add 100644
--- 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/DubboGreeterTriple.java
+++ 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/DubboGreeterTriple.java
@@ -101,6 +101,7 @@ public final class DubboGreeterTriple {
             return StubInvocationUtil.unaryCall(invoker, greetMethod, request);
         }
 
+        @Override
         public 
CompletableFuture<org.apache.dubbo.samples.tri.unary.GreeterReply> 
greetAsync(org.apache.dubbo.samples.tri.unary.GreeterRequest request){
             return StubInvocationUtil.unaryCall(invoker, greetAsyncMethod, 
request);
         }
diff --git 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterReply.java
 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterReply.java
index 58ac498d3..6a65dfa97 100644
--- 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterReply.java
+++ 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterReply.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       message_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getMessageBytes() {
     java.lang.Object ref = message_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       message_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(message_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.samples.tri.unary.GreeterReply other = 
(org.apache.dubbo.samples.tri.unary.GreeterReply) obj;
 
     if (!getMessage()
-        .equals(other.getMessage())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getMessage())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder mergeFrom(org.apache.dubbo.samples.tri.unary.GreeterReply 
other) {
-      if (other == 
org.apache.dubbo.samples.tri.unary.GreeterReply.getDefaultInstance()) return 
this;
+      if (other == 
org.apache.dubbo.samples.tri.unary.GreeterReply.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getMessage().isEmpty()) {
         message_ = other.message_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The message.
      */
+    @Override
     public java.lang.String getMessage() {
       java.lang.Object ref = message_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The bytes for message.
      */
+    @Override
     public com.google.protobuf.ByteString
         getMessageBytes() {
       java.lang.Object ref = message_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         message_ = b;
diff --git 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterRequest.java
 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterRequest.java
index 712cd868f..27b3279ff 100644
--- 
a/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterRequest.java
+++ 
b/1-basic/dubbo-samples-api-idl/build/generated/source/proto/main/java/org/apache/dubbo/samples/tri/unary/GreeterRequest.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       name_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       name_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.samples.tri.unary.GreeterRequest other = 
(org.apache.dubbo.samples.tri.unary.GreeterRequest) obj;
 
     if (!getName()
-        .equals(other.getName())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getName())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder mergeFrom(org.apache.dubbo.samples.tri.unary.GreeterRequest 
other) {
-      if (other == 
org.apache.dubbo.samples.tri.unary.GreeterRequest.getDefaultInstance()) return 
this;
+      if (other == 
org.apache.dubbo.samples.tri.unary.GreeterRequest.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getName().isEmpty()) {
         name_ = other.name_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The name.
      */
+    @Override
     public java.lang.String getName() {
       java.lang.Object ref = name_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The bytes for name.
      */
+    @Override
     public com.google.protobuf.ByteString
         getNameBytes() {
       java.lang.Object ref = name_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         name_ = b;
diff --git 
a/1-basic/dubbo-samples-api-idl/src/main/java/org/apache/dubbo/samples/tri/unary/GreeterImpl.java
 
b/1-basic/dubbo-samples-api-idl/src/main/java/org/apache/dubbo/samples/tri/unary/GreeterImpl.java
index 1c335b56f..50a6a5ad5 100644
--- 
a/1-basic/dubbo-samples-api-idl/src/main/java/org/apache/dubbo/samples/tri/unary/GreeterImpl.java
+++ 
b/1-basic/dubbo-samples-api-idl/src/main/java/org/apache/dubbo/samples/tri/unary/GreeterImpl.java
@@ -37,6 +37,7 @@ public class GreeterImpl extends 
DubboGreeterTriple.GreeterImplBase {
                 .setMessage("hello," + request.getName())
                 .build();
     }
+    @Override
     public CompletableFuture<GreeterReply> greetAsync(GreeterRequest request){
         return CompletableFuture.completedFuture(greet(request));
     }
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
index d515e1bc2..503f25496 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
@@ -101,6 +101,7 @@ public final class DubboGreeterTriple {
             return StubInvocationUtil.unaryCall(invoker, greetMethod, request);
         }
 
+        @Override
         public 
CompletableFuture<org.apache.dubbo.springboot.demo.idl.GreeterReply> 
greetAsync(org.apache.dubbo.springboot.demo.idl.GreeterRequest request){
             return StubInvocationUtil.unaryCall(invoker, greetAsyncMethod, 
request);
         }
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
index 0cbafe853..9db546a2f 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       message_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getMessageBytes() {
     java.lang.Object ref = message_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       message_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(message_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.springboot.demo.idl.GreeterReply other = 
(org.apache.dubbo.springboot.demo.idl.GreeterReply) obj;
 
     if (!getMessage()
-        .equals(other.getMessage())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getMessage())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder mergeFrom(org.apache.dubbo.springboot.demo.idl.GreeterReply 
other) {
-      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterReply.getDefaultInstance()) return 
this;
+      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterReply.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getMessage().isEmpty()) {
         message_ = other.message_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The message.
      */
+    @Override
     public java.lang.String getMessage() {
       java.lang.Object ref = message_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The bytes for message.
      */
+    @Override
     public com.google.protobuf.ByteString
         getMessageBytes() {
       java.lang.Object ref = message_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         message_ = b;
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
index d8c377751..656263d78 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-consumer/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       name_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       name_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.springboot.demo.idl.GreeterRequest other = 
(org.apache.dubbo.springboot.demo.idl.GreeterRequest) obj;
 
     if (!getName()
-        .equals(other.getName())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getName())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder 
mergeFrom(org.apache.dubbo.springboot.demo.idl.GreeterRequest other) {
-      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterRequest.getDefaultInstance()) 
return this;
+      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterRequest.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getName().isEmpty()) {
         name_ = other.name_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The name.
      */
+    @Override
     public java.lang.String getName() {
       java.lang.Object ref = name_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The bytes for name.
      */
+    @Override
     public com.google.protobuf.ByteString
         getNameBytes() {
       java.lang.Object ref = name_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         name_ = b;
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
index d515e1bc2..503f25496 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/DubboGreeterTriple.java
@@ -101,6 +101,7 @@ public final class DubboGreeterTriple {
             return StubInvocationUtil.unaryCall(invoker, greetMethod, request);
         }
 
+        @Override
         public 
CompletableFuture<org.apache.dubbo.springboot.demo.idl.GreeterReply> 
greetAsync(org.apache.dubbo.springboot.demo.idl.GreeterRequest request){
             return StubInvocationUtil.unaryCall(invoker, greetAsyncMethod, 
request);
         }
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
index 0cbafe853..9db546a2f 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterReply.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       message_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getMessageBytes() {
     java.lang.Object ref = message_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       message_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(message_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.springboot.demo.idl.GreeterReply other = 
(org.apache.dubbo.springboot.demo.idl.GreeterReply) obj;
 
     if (!getMessage()
-        .equals(other.getMessage())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getMessage())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder mergeFrom(org.apache.dubbo.springboot.demo.idl.GreeterReply 
other) {
-      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterReply.getDefaultInstance()) return 
this;
+      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterReply.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getMessage().isEmpty()) {
         message_ = other.message_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The message.
      */
+    @Override
     public java.lang.String getMessage() {
       java.lang.Object ref = message_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string message = 1;</code>
      * @return The bytes for message.
      */
+    @Override
     public com.google.protobuf.ByteString
         getMessageBytes() {
       java.lang.Object ref = message_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         message_ = b;
diff --git 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
index d8c377751..656263d78 100644
--- 
a/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
+++ 
b/1-basic/dubbo-samples-spring-boot-idl/dubbo-samples-spring-boot-idl-provider/build/generated/source/proto/main/java/org/apache/dubbo/springboot/demo/idl/GreeterRequest.java
@@ -52,7 +52,7 @@ private static final long serialVersionUID = 0L;
     if (ref instanceof java.lang.String) {
       return (java.lang.String) ref;
     } else {
-      com.google.protobuf.ByteString bs = 
+      com.google.protobuf.ByteString bs =
           (com.google.protobuf.ByteString) ref;
       java.lang.String s = bs.toStringUtf8();
       name_ = s;
@@ -68,7 +68,7 @@ private static final long serialVersionUID = 0L;
       getNameBytes() {
     java.lang.Object ref = name_;
     if (ref instanceof java.lang.String) {
-      com.google.protobuf.ByteString b = 
+      com.google.protobuf.ByteString b =
           com.google.protobuf.ByteString.copyFromUtf8(
               (java.lang.String) ref);
       name_ = b;
@@ -82,8 +82,12 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public final boolean isInitialized() {
     byte isInitialized = memoizedIsInitialized;
-    if (isInitialized == 1) return true;
-    if (isInitialized == 0) return false;
+    if (isInitialized == 1) {
+        return true;
+    }
+    if (isInitialized == 0) {
+        return false;
+    }
 
     memoizedIsInitialized = 1;
     return true;
@@ -101,7 +105,9 @@ private static final long serialVersionUID = 0L;
   @java.lang.Override
   public int getSerializedSize() {
     int size = memoizedSize;
-    if (size != -1) return size;
+    if (size != -1) {
+        return size;
+    }
 
     size = 0;
     if (!com.google.protobuf.GeneratedMessageV3.isStringEmpty(name_)) {
@@ -123,8 +129,12 @@ private static final long serialVersionUID = 0L;
     org.apache.dubbo.springboot.demo.idl.GreeterRequest other = 
(org.apache.dubbo.springboot.demo.idl.GreeterRequest) obj;
 
     if (!getName()
-        .equals(other.getName())) return false;
-    if (!getUnknownFields().equals(other.getUnknownFields())) return false;
+        .equals(other.getName())) {
+        return false;
+    }
+    if (!getUnknownFields().equals(other.getUnknownFields())) {
+        return false;
+    }
     return true;
   }
 
@@ -316,7 +326,9 @@ private static final long serialVersionUID = 0L;
     }
 
     public Builder 
mergeFrom(org.apache.dubbo.springboot.demo.idl.GreeterRequest other) {
-      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterRequest.getDefaultInstance()) 
return this;
+      if (other == 
org.apache.dubbo.springboot.demo.idl.GreeterRequest.getDefaultInstance()) {
+          return this;
+      }
       if (!other.getName().isEmpty()) {
         name_ = other.name_;
         bitField0_ |= 0x00000001;
@@ -375,6 +387,7 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The name.
      */
+    @Override
     public java.lang.String getName() {
       java.lang.Object ref = name_;
       if (!(ref instanceof java.lang.String)) {
@@ -391,11 +404,12 @@ private static final long serialVersionUID = 0L;
      * <code>string name = 1;</code>
      * @return The bytes for name.
      */
+    @Override
     public com.google.protobuf.ByteString
         getNameBytes() {
       java.lang.Object ref = name_;
       if (ref instanceof String) {
-        com.google.protobuf.ByteString b = 
+        com.google.protobuf.ByteString b =
             com.google.protobuf.ByteString.copyFromUtf8(
                 (java.lang.String) ref);
         name_ = b;
diff --git 
a/10-task/dubbo-samples-metrics-demo/dubbo-samples-metrics-demo-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
 
b/10-task/dubbo-samples-metrics-demo/dubbo-samples-metrics-demo-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
index 6eba91d1f..759a5f388 100644
--- 
a/10-task/dubbo-samples-metrics-demo/dubbo-samples-metrics-demo-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
+++ 
b/10-task/dubbo-samples-metrics-demo/dubbo-samples-metrics-demo-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
@@ -70,6 +70,7 @@ public class ShopServiceImpl implements ShopService {
         return detailService.getItem(sku, username);
     }
 
+    @Override
     public Item checkItemGray(long sku, String username) {
         return detailService.getItem(sku, username);
     }
diff --git 
a/10-task/dubbo-samples-shop/dubbo-samples-shop-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
 
b/10-task/dubbo-samples-shop/dubbo-samples-shop-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
index b5b0c3184..7056f7607 100644
--- 
a/10-task/dubbo-samples-shop/dubbo-samples-shop-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
+++ 
b/10-task/dubbo-samples-shop/dubbo-samples-shop-frontend/src/main/java/org/apache/dubbo/samples/frontend/ShopServiceImpl.java
@@ -72,6 +72,7 @@ public class ShopServiceImpl implements ShopService {
         return detailService.getItem(sku, username);
     }
 
+    @Override
     public Item checkItemGray(long sku, String username) {
         return detailService.getItem(sku, username);
     }
diff --git 
a/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationGreetingServiceImpl.java
 
b/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationGreetingServiceImpl.java
index a5cb300f4..635b86bfc 100644
--- 
a/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationGreetingServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationGreetingServiceImpl.java
@@ -30,6 +30,7 @@ public class AnnotationGreetingServiceImpl implements 
GreetingService {
         return "Annotation, greeting " + name;
     }
 
+    @Override
     public String replyGreeting(String name) {
         System.out.println("provider received invoke of replyGreeting: " + 
name);
         sleepWhile();
diff --git 
a/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationHelloServiceImpl.java
 
b/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationHelloServiceImpl.java
index a192486ad..8190ec97b 100644
--- 
a/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationHelloServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-annotation/src/main/java/org/apache/dubbo/samples/annotation/impl/AnnotationHelloServiceImpl.java
@@ -32,6 +32,7 @@ public class AnnotationHelloServiceImpl implements 
HelloService {
         return "Annotation, hello " + name;
     }
 
+    @Override
     public String sayGoodbye(String name) {
         System.out.println("provider received invoke of sayGoodbye: " + name);
         sleepWhile();
diff --git 
a/2-advanced/dubbo-samples-attachment/dubbo-samples-attachment-provider/src/main/java/org/apache/dubbo/samples/attachment/impl/AttachmentImpl.java
 
b/2-advanced/dubbo-samples-attachment/dubbo-samples-attachment-provider/src/main/java/org/apache/dubbo/samples/attachment/impl/AttachmentImpl.java
index bd058d0b0..6eaa9e0d7 100644
--- 
a/2-advanced/dubbo-samples-attachment/dubbo-samples-attachment-provider/src/main/java/org/apache/dubbo/samples/attachment/impl/AttachmentImpl.java
+++ 
b/2-advanced/dubbo-samples-attachment/dubbo-samples-attachment-provider/src/main/java/org/apache/dubbo/samples/attachment/impl/AttachmentImpl.java
@@ -30,6 +30,7 @@ import java.util.Date;
 @DubboService
 public class AttachmentImpl implements AttachmentService {
 
+    @Override
     public String sayHello(String name) {
         RpcContext context = RpcContext.getContext();
 
diff --git 
a/2-advanced/dubbo-samples-docker/src/main/java/org/apache/dubbo/samples/docker/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-docker/src/main/java/org/apache/dubbo/samples/docker/DemoServiceImpl.java
index d36fe7b5c..c9c8c938d 100644
--- 
a/2-advanced/dubbo-samples-docker/src/main/java/org/apache/dubbo/samples/docker/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-docker/src/main/java/org/apache/dubbo/samples/docker/DemoServiceImpl.java
@@ -20,6 +20,7 @@
 package org.apache.dubbo.samples.docker;
 
 public class DemoServiceImpl implements DemoService {
+    @Override
     public String hello(String str) {
         return "Hello " + str + " from docker";
     }
diff --git 
a/2-advanced/dubbo-samples-gateway/dubbo-samples-gateway-apisix/dubbo-samples-gateway-apisix-dubbo/dubbo-samples-gateway-apisix-dubbo-provider/src/main/java/org/apache/dubbo/samples/gateway/apisix.dubbo/provider/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-gateway/dubbo-samples-gateway-apisix/dubbo-samples-gateway-apisix-dubbo/dubbo-samples-gateway-apisix-dubbo-provider/src/main/java/org/apache/dubbo/samples/gateway/apisix.dubbo/provider/DemoServiceImpl.java
index 1a6eae892..eee43b6bb 100644
--- 
a/2-advanced/dubbo-samples-gateway/dubbo-samples-gateway-apisix/dubbo-samples-gateway-apisix-dubbo/dubbo-samples-gateway-apisix-dubbo-provider/src/main/java/org/apache/dubbo/samples/gateway/apisix.dubbo/provider/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-gateway/dubbo-samples-gateway-apisix/dubbo-samples-gateway-apisix-dubbo/dubbo-samples-gateway-apisix-dubbo-provider/src/main/java/org/apache/dubbo/samples/gateway/apisix.dubbo/provider/DemoServiceImpl.java
@@ -22,6 +22,7 @@ import 
org.apache.dubbo.samples.gateway.apisix.dubbo.api.DemoService;
 
 @DubboService
 public class DemoServiceImpl implements DemoService {
+    @Override
     public String sayHello(String name) {
         return "Hello " + name;
     }
diff --git 
a/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupAServiceImpl.java
 
b/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupAServiceImpl.java
index ab01d3ca2..dae198561 100644
--- 
a/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupAServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupAServiceImpl.java
@@ -29,6 +29,7 @@ import java.util.Date;
 @DubboService(group = "groupA")
 public class GroupAServiceImpl implements GroupService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new 
Date()) + "] Hello " + name +
                 ", request from consumer: " + 
RpcContext.getContext().getRemoteAddress() + "in groupA");
diff --git 
a/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupBServiceImpl.java
 
b/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupBServiceImpl.java
index 32983ae94..5587371ce 100644
--- 
a/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupBServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-group/dubbo-samples-group-provider/src/main/java/org/apache/dubbo/samples/group/provider/GroupBServiceImpl.java
@@ -29,6 +29,7 @@ import java.util.Date;
 @DubboService(group = "groupB")
 public class GroupBServiceImpl implements GroupService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new 
Date()) + "] Hello " + name +
                 ", request from consumer: " + 
RpcContext.getContext().getRemoteAddress() + "in groupB");
diff --git 
a/2-advanced/dubbo-samples-local/src/main/java/org/apache/dubbo/samples/local/impl/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-local/src/main/java/org/apache/dubbo/samples/local/impl/DemoServiceImpl.java
index da897ca7a..311c2874d 100644
--- 
a/2-advanced/dubbo-samples-local/src/main/java/org/apache/dubbo/samples/local/impl/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-local/src/main/java/org/apache/dubbo/samples/local/impl/DemoServiceImpl.java
@@ -29,6 +29,7 @@ import java.util.Date;
 
 public class DemoServiceImpl implements DemoService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new 
Date()) + "] Hello " + name +
                 ", request from consumer: " + 
RpcContext.getContext().getRemoteAddress());
diff --git 
a/2-advanced/dubbo-samples-mock/dubbo-samples-mock-consumer/src/main/java/org/apache/dubbo/samples/mock/api/DemoServiceMock.java
 
b/2-advanced/dubbo-samples-mock/dubbo-samples-mock-consumer/src/main/java/org/apache/dubbo/samples/mock/api/DemoServiceMock.java
index ad2bdd911..45f35842d 100644
--- 
a/2-advanced/dubbo-samples-mock/dubbo-samples-mock-consumer/src/main/java/org/apache/dubbo/samples/mock/api/DemoServiceMock.java
+++ 
b/2-advanced/dubbo-samples-mock/dubbo-samples-mock-consumer/src/main/java/org/apache/dubbo/samples/mock/api/DemoServiceMock.java
@@ -23,6 +23,7 @@ import org.apache.dubbo.common.logger.LoggerFactory;
 public class DemoServiceMock implements DemoService {
     private static Logger logger = 
LoggerFactory.getLogger(DemoServiceMock.class);
 
+    @Override
     public String sayHello(String name) {
         logger.warn("about to execute mock: " + 
DemoServiceMock.class.getSimpleName());
         return "mock " + name;
diff --git 
a/2-advanced/dubbo-samples-mock/dubbo-samples-mock-provider/src/main/java/org/apache/dubbo/samples/mock/provider/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-mock/dubbo-samples-mock-provider/src/main/java/org/apache/dubbo/samples/mock/provider/DemoServiceImpl.java
index b54bcd99f..8280387ab 100644
--- 
a/2-advanced/dubbo-samples-mock/dubbo-samples-mock-provider/src/main/java/org/apache/dubbo/samples/mock/provider/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-mock/dubbo-samples-mock-provider/src/main/java/org/apache/dubbo/samples/mock/provider/DemoServiceImpl.java
@@ -23,6 +23,7 @@ import org.apache.dubbo.samples.mock.api.DemoService;
 @DubboService
 public class DemoServiceImpl implements DemoService {
 
+    @Override
     public String sayHello(String name) {
         try {
             // sleeping 5 seconds leads to TimeoutException on client side, 
and mock impl will be invoked
diff --git 
a/2-advanced/dubbo-samples-native-image-registry/dubbo-samples-native-image-registry-provider/src/main/java/org/apache/dubbo/registry/provider/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-native-image-registry/dubbo-samples-native-image-registry-provider/src/main/java/org/apache/dubbo/registry/provider/DemoServiceImpl.java
index 2834b5112..9c743d678 100644
--- 
a/2-advanced/dubbo-samples-native-image-registry/dubbo-samples-native-image-registry-provider/src/main/java/org/apache/dubbo/registry/provider/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-native-image-registry/dubbo-samples-native-image-registry-provider/src/main/java/org/apache/dubbo/registry/provider/DemoServiceImpl.java
@@ -30,6 +30,7 @@ public class DemoServiceImpl implements DemoService {
 
     private static final Logger logger = 
LoggerFactory.getLogger(DemoServiceImpl.class);
 
+    @Override
     public HelloResponse sayHello(HelloRequest request) {
         logger.info("Hello " + request.getName() + ", request from consumer: " 
+ RpcContext.getContext().getRemoteAddress());
         return new HelloResponse(request.getName());
diff --git 
a/2-advanced/dubbo-samples-native-image/dubbo-samples-native-image-provider/src/main/java/org/apache/dubbo/nativeimage/provider/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-native-image/dubbo-samples-native-image-provider/src/main/java/org/apache/dubbo/nativeimage/provider/DemoServiceImpl.java
index 145acba88..7c6c206a8 100644
--- 
a/2-advanced/dubbo-samples-native-image/dubbo-samples-native-image-provider/src/main/java/org/apache/dubbo/nativeimage/provider/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-native-image/dubbo-samples-native-image-provider/src/main/java/org/apache/dubbo/nativeimage/provider/DemoServiceImpl.java
@@ -30,6 +30,7 @@ public class DemoServiceImpl implements DemoService {
 
     private static final Logger logger = 
LoggerFactory.getLogger(DemoServiceImpl.class);
 
+    @Override
     public HelloResponse sayHello(HelloRequest request) {
         logger.info("Hello " + request.getName() + ", request from consumer: " 
+ RpcContext.getContext().getRemoteAddress());
         return new HelloResponse(request.getName());
diff --git 
a/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/impl/DemoServiceImpl.java
 
b/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/impl/DemoServiceImpl.java
index 8c4ec04b0..6fd6ed697 100644
--- 
a/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/impl/DemoServiceImpl.java
+++ 
b/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/impl/DemoServiceImpl.java
@@ -28,6 +28,7 @@ import java.util.Date;
 
 public class DemoServiceImpl implements DemoService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new 
Date()) + "] Hello " + name +
                 ", request from consumer: " + 
RpcContext.getContext().getRemoteAddress());
diff --git 
a/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/spi/CompatibleProtocol.java
 
b/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/spi/CompatibleProtocol.java
index c432db5c9..af20b6517 100644
--- 
a/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/spi/CompatibleProtocol.java
+++ 
b/2-advanced/dubbo-samples-spi-compatible/src/main/java/org/apache/dubbo/samples/basic/spi/CompatibleProtocol.java
@@ -34,10 +34,12 @@ public class CompatibleProtocol implements Protocol {
         return 20880;
     }
 
+    @Override
     public <T> Exporter<T> export(Invoker<T> invoker) throws RpcException {
         return new MyExporter<>();
     }
 
+    @Override
     public <T> Invoker<T> refer(Class<T> aClass, URL url) throws RpcException {
         return new MyInvoker<>();
     }
diff --git 
a/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/ClientTraceFilter.java
 
b/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/ClientTraceFilter.java
index 709f2ab5b..e6eae9b89 100644
--- 
a/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/ClientTraceFilter.java
+++ 
b/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/ClientTraceFilter.java
@@ -26,10 +26,12 @@ import java.io.IOException;
 
 public class ClientTraceFilter implements ClientRequestFilter, 
ClientResponseFilter {
 
+    @Override
     public void filter(ClientRequestContext requestContext) throws IOException 
{
         System.out.println("Client request filter invoked");
     }
 
+    @Override
     public void filter(ClientRequestContext clientRequestContext, 
ClientResponseContext clientResponseContext) throws
         IOException {
         System.out.println("Client response filter invoked");
diff --git 
a/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/CustomExceptionMapper.java
 
b/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/CustomExceptionMapper.java
index 0fc61a53e..15a0f2db0 100644
--- 
a/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/CustomExceptionMapper.java
+++ 
b/3-extensions/protocol/dubbo-samples-rest/src/main/java/org/apache/dubbo/samples/rest/api/extension/CustomExceptionMapper.java
@@ -26,6 +26,7 @@ import javax.ws.rs.ext.ExceptionMapper;
 
 public class CustomExceptionMapper implements 
ExceptionMapper<NotFoundException> {
 
+    @Override
     public Response toResponse(NotFoundException e) {
         System.out.println("Exception mapper successfully got an exception: " 
+ e + ":" + e.getMessage());
         System.out.println("Client IP is " + 
RpcContext.getContext().getRemoteAddressString());
diff --git 
a/3-extensions/protocol/dubbo-samples-rocketmq/src/main/java/org/apache/dubbo/samples/rocketmq/impl/DemoServiceImpl.java
 
b/3-extensions/protocol/dubbo-samples-rocketmq/src/main/java/org/apache/dubbo/samples/rocketmq/impl/DemoServiceImpl.java
index 3c9c88d92..8f8ec2d85 100644
--- 
a/3-extensions/protocol/dubbo-samples-rocketmq/src/main/java/org/apache/dubbo/samples/rocketmq/impl/DemoServiceImpl.java
+++ 
b/3-extensions/protocol/dubbo-samples-rocketmq/src/main/java/org/apache/dubbo/samples/rocketmq/impl/DemoServiceImpl.java
@@ -27,6 +27,7 @@ import java.util.Date;
 
 public class DemoServiceImpl implements DemoService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("[" + new SimpleDateFormat("HH:mm:ss").format(new 
Date()) + "] Hello " + name +
             ", request from consumer: " + 
RpcContext.getContext().getRemoteAddress());
diff --git 
a/3-extensions/protocol/dubbo-samples-triple/src/main/java/org/apache/dubbo/sample/tri/pojo/PojoGreeterImpl.java
 
b/3-extensions/protocol/dubbo-samples-triple/src/main/java/org/apache/dubbo/sample/tri/pojo/PojoGreeterImpl.java
index a5985a44b..ef6e4ff59 100644
--- 
a/3-extensions/protocol/dubbo-samples-triple/src/main/java/org/apache/dubbo/sample/tri/pojo/PojoGreeterImpl.java
+++ 
b/3-extensions/protocol/dubbo-samples-triple/src/main/java/org/apache/dubbo/sample/tri/pojo/PojoGreeterImpl.java
@@ -38,6 +38,7 @@ public class PojoGreeterImpl implements PojoGreeter {
         this.delegate = new GreeterImpl("tri-wrap");
     }
 
+    @Override
     public CompletableFuture<String> unaryFuture(String request) {
         return CompletableFuture.completedFuture(request);
     }
diff --git 
a/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/DemoServiceImpl.java
 
b/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/DemoServiceImpl.java
index 061f44f31..3ee87d299 100644
--- 
a/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/DemoServiceImpl.java
+++ 
b/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/DemoServiceImpl.java
@@ -24,6 +24,7 @@ import 
org.apache.dubbo.samples.multi.registry.api.DemoService;
 
 public class DemoServiceImpl implements DemoService {
 
+    @Override
     public String get(String name) {
         return "get: " + name;
     }
diff --git 
a/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/HelloServiceImpl.java
 
b/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/HelloServiceImpl.java
index c039a4152..bceb75c1e 100644
--- 
a/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/HelloServiceImpl.java
+++ 
b/3-extensions/registry/dubbo-samples-default-config/src/main/java/org/apache/dubbo/samples/multi/registry/impl/HelloServiceImpl.java
@@ -24,6 +24,7 @@ import 
org.apache.dubbo.samples.multi.registry.api.HelloService;
 
 public class HelloServiceImpl implements HelloService {
 
+    @Override
     public String sayHello(String name) {
         return "sayHello: " + name;
     }
diff --git 
a/3-extensions/registry/dubbo-samples-kubernetes/dubbo-samples-apiserver-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
 
b/3-extensions/registry/dubbo-samples-kubernetes/dubbo-samples-apiserver-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
index ae18b1d0f..91628dcf9 100644
--- 
a/3-extensions/registry/dubbo-samples-kubernetes/dubbo-samples-apiserver-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
+++ 
b/3-extensions/registry/dubbo-samples-kubernetes/dubbo-samples-apiserver-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
@@ -25,6 +25,7 @@ import org.apache.dubbo.samples.api.GreetingService;
 @DubboService(version = "1.0.0")
 public class AnnotatedGreetingService implements GreetingService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("greeting service received: " + name);
         return "hello, " + name;
diff --git 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService1.java
 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService1.java
index af8a1600d..187f9191b 100644
--- 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService1.java
+++ 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService1.java
@@ -28,6 +28,7 @@ import java.util.List;
 @DubboService(version = "1.0.0", group = "1")
 public class AnnotatedGreetingService1 implements GreetingService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("greeting service received: " + name);
         return "hello, " + name + " from group 1";
diff --git 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService2.java
 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService2.java
index a30c55c73..005bd16ee 100644
--- 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService2.java
+++ 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-group/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService2.java
@@ -28,6 +28,7 @@ import java.util.List;
 @DubboService(version = "1.0.0", group = "2")
 public class AnnotatedGreetingService2 implements GreetingService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("greeting service received: " + name);
         return "hello, " + name + " from group 2";
diff --git 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-registry/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-registry/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
index ae18b1d0f..91628dcf9 100644
--- 
a/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-registry/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
+++ 
b/3-extensions/registry/dubbo-samples-nacos/dubbo-samples-nacos-registry/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
@@ -25,6 +25,7 @@ import org.apache.dubbo.samples.api.GreetingService;
 @DubboService(version = "1.0.0")
 public class AnnotatedGreetingService implements GreetingService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("greeting service received: " + name);
         return "hello, " + name;
diff --git 
a/3-extensions/registry/dubbo-samples-zookeeper/dubbo-samples-zookeeper-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
 
b/3-extensions/registry/dubbo-samples-zookeeper/dubbo-samples-zookeeper-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
index f3a0f6dd1..e36e8c3e1 100644
--- 
a/3-extensions/registry/dubbo-samples-zookeeper/dubbo-samples-zookeeper-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
+++ 
b/3-extensions/registry/dubbo-samples-zookeeper/dubbo-samples-zookeeper-provider/src/main/java/org/apache/dubbo/samples/impl/AnnotatedGreetingService.java
@@ -25,6 +25,7 @@ import org.apache.dubbo.config.annotation.DubboService;
 @DubboService(version = "1.0.0")
 public class AnnotatedGreetingService implements GreetingService {
 
+    @Override
     public String sayHello(String name) {
         System.out.println("greeting service received: " + name);
         return "hello, " + name;


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