diff --git a/src/main/java/org/b3log/symphony/processor/CommentProcessor.java b/src/main/java/org/b3log/symphony/processor/CommentProcessor.java
index b44d967c2..3df288f71 100644
--- a/src/main/java/org/b3log/symphony/processor/CommentProcessor.java
+++ b/src/main/java/org/b3log/symphony/processor/CommentProcessor.java
@@ -21,14 +21,12 @@
 import org.apache.logging.log4j.LogManager;
 import org.apache.logging.log4j.Logger;
 import org.b3log.latke.Keys;
-import org.b3log.latke.http.HttpMethod;
+import org.b3log.latke.http.Dispatcher;
 import org.b3log.latke.http.Request;
 import org.b3log.latke.http.RequestContext;
-import org.b3log.latke.http.annotation.After;
-import org.b3log.latke.http.annotation.Before;
-import org.b3log.latke.http.annotation.RequestProcessing;
-import org.b3log.latke.http.annotation.RequestProcessor;
+import org.b3log.latke.ioc.BeanManager;
 import org.b3log.latke.ioc.Inject;
+import org.b3log.latke.ioc.Singleton;
 import org.b3log.latke.model.User;
 import org.b3log.latke.service.LangPropsService;
 import org.b3log.latke.service.ServiceException;
@@ -37,10 +35,8 @@
 import org.b3log.symphony.processor.middleware.CSRFMidware;
 import org.b3log.symphony.processor.middleware.LoginCheckMidware;
 import org.b3log.symphony.processor.middleware.PermissionMidware;
-import org.b3log.symphony.processor.middleware.stopwatch.StopwatchEndAdvice;
-import org.b3log.symphony.processor.middleware.stopwatch.StopwatchStartAdvice;
-import org.b3log.symphony.processor.middleware.validate.CommentAddValidation;
-import org.b3log.symphony.processor.middleware.validate.CommentUpdateValidation;
+import org.b3log.symphony.processor.middleware.validate.CommentAddValidationMidware;
+import org.b3log.symphony.processor.middleware.validate.CommentUpdateValidationMidware;
 import org.b3log.symphony.service.*;
 import org.b3log.symphony.util.*;
 import org.json.JSONObject;
@@ -63,10 +59,10 @@
  * </ul>
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.8.0.5, Dec 16, 2018
+ * @version 2.0.0.0, Feb 11, 2020
  * @since 0.2.0
  */
-@RequestProcessor
+@Singleton
 public class CommentProcessor {
 
     /**
@@ -128,17 +124,37 @@ public class CommentProcessor {
     @Inject
     private FollowMgmtService followMgmtService;
 
+    /**
+     * Register request handlers.
+     */
+    public static void register() {
+        final BeanManager beanManager = BeanManager.getInstance();
+        final LoginCheckMidware loginCheck = beanManager.getReference(LoginCheckMidware.class);
+        final PermissionMidware permissionMidware = beanManager.getReference(PermissionMidware.class);
+        final CSRFMidware csrfMidware = beanManager.getReference(CSRFMidware.class);
+        final CommentUpdateValidationMidware commentUpdateValidationMidware = beanManager.getReference(CommentUpdateValidationMidware.class);
+        final CommentAddValidationMidware commentAddValidationMidware = beanManager.getReference(CommentAddValidationMidware.class);
+
+        final CommentProcessor commentProcessor = beanManager.getReference(CommentProcessor.class);
+        Dispatcher.post("/comment/accept", commentProcessor::acceptComment, loginCheck::handle, csrfMidware::check, permissionMidware::check);
+        Dispatcher.post("/comment/{id}/remove", commentProcessor::removeComment, loginCheck::handle, permissionMidware::check);
+        Dispatcher.get("/comment/{id}/revisions", commentProcessor::getCommentRevisions, loginCheck::handle, permissionMidware::check);
+        Dispatcher.get("/comment/{id}/content", commentProcessor::getCommentContent, loginCheck::handle);
+        Dispatcher.put("/comment/{id}", commentProcessor::updateComment, loginCheck::handle, csrfMidware::check, permissionMidware::check, commentUpdateValidationMidware::handle);
+        Dispatcher.post("/comment/original", commentProcessor::getOriginalComment);
+        Dispatcher.post("/comment/replies", commentProcessor::getReplies);
+        Dispatcher.post("/comment", commentProcessor::addComment, loginCheck::handle, csrfMidware::check, permissionMidware::check, commentAddValidationMidware::handle);
+        Dispatcher.post("/comment/thank", commentProcessor::thankComment, loginCheck::handle, csrfMidware::check, permissionMidware::check);
+    }
+
     /**
      * Accepts a comment.
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/accept", method = HttpMethod.POST)
-    @Before({LoginCheckMidware.class, CSRFMidware.class, PermissionMidware.class})
     public void acceptComment(final RequestContext context) {
         context.renderJSON();
 
-        final Request request = context.getRequest();
         final JSONObject requestJSONObject = context.requestJSON();
         final JSONObject currentUser = Sessions.getUser();
         final String userId = currentUser.optString(Keys.OBJECT_ID);
@@ -179,12 +195,8 @@ public void acceptComment(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/{id}/remove", method = HttpMethod.POST)
-    @Before({StopwatchStartAdvice.class, LoginCheckMidware.class, PermissionMidware.class})
-    @After({StopwatchEndAdvice.class})
     public void removeComment(final RequestContext context) {
         final String id = context.pathVar("id");
-        final Request request = context.getRequest();
         if (StringUtils.isBlank(id)) {
             context.sendError(404);
 
@@ -226,9 +238,6 @@ public void removeComment(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/{id}/revisions", method = HttpMethod.GET)
-    @Before({StopwatchStartAdvice.class, LoginCheckMidware.class, PermissionMidware.class})
-    @After({StopwatchEndAdvice.class})
     public void getCommentRevisions(final RequestContext context) {
         final String id = context.pathVar("id");
         final JSONObject viewer = Sessions.getUser();
@@ -245,8 +254,6 @@ public void getCommentRevisions(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/{id}/content", method = HttpMethod.GET)
-    @Before({LoginCheckMidware.class})
     public void getCommentContent(final RequestContext context) {
         final String id = context.pathVar("id");
         context.renderJSON().renderJSONValue(Keys.STATUS_CODE, StatusCodes.ERR);
@@ -284,8 +291,6 @@ public void getCommentContent(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/{id}", method = HttpMethod.PUT)
-    @Before({CSRFMidware.class, LoginCheckMidware.class, CommentUpdateValidation.class, PermissionMidware.class})
     public void updateComment(final RequestContext context) {
         final String id = context.pathVar("id");
         context.renderJSON().renderJSONValue(Keys.STATUS_CODE, StatusCodes.ERR);
@@ -349,9 +354,7 @@ public void updateComment(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/original", method = HttpMethod.POST)
     public void getOriginalComment(final RequestContext context) {
-        final Request request = context.getRequest();
         final JSONObject requestJSONObject = context.requestJSON();
         final String commentId = requestJSONObject.optString(Comment.COMMENT_T_ID);
         int commentViewMode = requestJSONObject.optInt(UserExt.USER_COMMENT_VIEW_MODE);
@@ -380,7 +383,6 @@ public void getOriginalComment(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/replies", method = HttpMethod.POST)
     public void getReplies(final RequestContext context) {
         final JSONObject requestJSONObject = context.requestJSON();
         final String commentId = requestJSONObject.optString(Comment.COMMENT_T_ID);
@@ -434,8 +436,6 @@ public void getReplies(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment", method = HttpMethod.POST)
-    @Before({CSRFMidware.class, LoginCheckMidware.class, CommentAddValidation.class, PermissionMidware.class})
     public void addComment(final RequestContext context) {
         context.renderJSON().renderJSONValue(Keys.STATUS_CODE, StatusCodes.ERR);
 
@@ -520,8 +520,6 @@ public void addComment(final RequestContext context) {
      *
      * @param context the specified context
      */
-    @RequestProcessing(value = "/comment/thank", method = HttpMethod.POST)
-    @Before({LoginCheckMidware.class, CSRFMidware.class, PermissionMidware.class})
     public void thankComment(final RequestContext context) {
         context.renderJSON();
 
diff --git a/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidation.java b/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidationMidware.java
similarity index 70%
rename from src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidation.java
rename to src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidationMidware.java
index 9c78b4e40..1481920ef 100644
--- a/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidation.java
+++ b/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentAddValidationMidware.java
@@ -21,8 +21,6 @@
 import org.b3log.latke.Keys;
 import org.b3log.latke.http.Request;
 import org.b3log.latke.http.RequestContext;
-import org.b3log.latke.http.advice.ProcessAdvice;
-import org.b3log.latke.http.advice.RequestProcessAdviceException;
 import org.b3log.latke.ioc.BeanManager;
 import org.b3log.latke.ioc.Singleton;
 import org.b3log.latke.service.LangPropsService;
@@ -38,27 +36,16 @@
  * Validates for comment adding locally.
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.3.0.4, Apr 7, 2019
+ * @version 2.0.0.0, Feb 11, 2020
  * @since 0.2.0
  */
 @Singleton
-public class CommentAddValidation extends ProcessAdvice {
+public class CommentAddValidationMidware {
 
-    @Override
-    public void doAdvice(final RequestContext context) throws RequestProcessAdviceException {
+    public void handle(final RequestContext context) {
         final Request request = context.getRequest();
         final JSONObject requestJSONObject = context.requestJSON();
         request.setAttribute(Keys.REQUEST, requestJSONObject);
-        validateCommentFields(requestJSONObject);
-    }
-
-    /**
-     * Validates comment fields.
-     *
-     * @param requestJSONObject the specified request object
-     * @throws RequestProcessAdviceException if validate failed
-     */
-    public static void validateCommentFields(final JSONObject requestJSONObject) throws RequestProcessAdviceException {
         final BeanManager beanManager = BeanManager.getInstance();
         final LangPropsService langPropsService = beanManager.getReference(LangPropsService.class);
         final OptionQueryService optionQueryService = beanManager.getReference(OptionQueryService.class);
@@ -70,33 +57,53 @@ public static void validateCommentFields(final JSONObject requestJSONObject) thr
 
         final String commentContent = StringUtils.trim(requestJSONObject.optString(Comment.COMMENT_CONTENT));
         if (StringUtils.isBlank(commentContent) || commentContent.length() > Comment.MAX_COMMENT_CONTENT_LENGTH) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("commentErrorLabel")));
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("commentErrorLabel")));
+            context.abort();
+
+            return;
         }
 
         if (optionQueryService.containReservedWord(commentContent)) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("contentContainReservedWordLabel")));
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("contentContainReservedWordLabel")));
+            context.abort();
+
+            return;
         }
 
         final String articleId = requestJSONObject.optString(Article.ARTICLE_T_ID);
         if (StringUtils.isBlank(articleId)) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+            context.abort();
+
+            return;
         }
 
         final JSONObject article = articleQueryService.getArticleById(articleId);
         if (null == article) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+            context.abort();
+
+            return;
         }
 
         if (!article.optBoolean(Article.ARTICLE_COMMENTABLE)) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("notAllowCmtLabel")));
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("notAllowCmtLabel")));
+            context.abort();
+
+            return;
         }
 
         final String originalCommentId = requestJSONObject.optString(Comment.COMMENT_ORIGINAL_COMMENT_ID);
         if (StringUtils.isNotBlank(originalCommentId)) {
             final JSONObject originalCmt = commentQueryService.getComment(originalCommentId);
             if (null == originalCmt) {
-                throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+                context.renderJSON(exception.put(Keys.MSG, langPropsService.get("commentArticleErrorLabel")));
+                context.abort();
+
+                return;
             }
         }
+
+        context.handle();
     }
 }
diff --git a/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidation.java b/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidationMidware.java
similarity index 68%
rename from src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidation.java
rename to src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidationMidware.java
index de2f7ea4a..b16c8b0c1 100644
--- a/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidation.java
+++ b/src/main/java/org/b3log/symphony/processor/middleware/validate/CommentUpdateValidationMidware.java
@@ -21,8 +21,6 @@
 import org.b3log.latke.Keys;
 import org.b3log.latke.http.Request;
 import org.b3log.latke.http.RequestContext;
-import org.b3log.latke.http.advice.ProcessAdvice;
-import org.b3log.latke.http.advice.RequestProcessAdviceException;
 import org.b3log.latke.ioc.BeanManager;
 import org.b3log.latke.ioc.Inject;
 import org.b3log.latke.ioc.Singleton;
@@ -38,11 +36,11 @@
  * Validates for comment updating locally.
  *
  * @author <a href="http://88250.b3log.org">Liang Ding</a>
- * @version 1.0.0.0, J, 2019
+ * @version 2.0.0.0, Feb 11, 2020
  * @since 2.1.0
  */
 @Singleton
-public class CommentUpdateValidation extends ProcessAdvice {
+public class CommentUpdateValidationMidware {
 
     /**
      * Language service.
@@ -68,13 +66,10 @@ public class CommentUpdateValidation extends ProcessAdvice {
     @Inject
     private OptionQueryService optionQueryService;
 
-    /**
-     * Validates comment fields.
-     *
-     * @param requestJSONObject the specified request object
-     * @throws RequestProcessAdviceException if validate failed
-     */
-    private static void validateCommentFields(final JSONObject requestJSONObject) throws RequestProcessAdviceException {
+    public void handle(final RequestContext context) {
+        final Request request = context.getRequest();
+        final JSONObject requestJSONObject = context.requestJSON();
+        request.setAttribute(Keys.REQUEST, requestJSONObject);
         final BeanManager beanManager = BeanManager.getInstance();
         final LangPropsService langPropsService = beanManager.getReference(LangPropsService.class);
         final OptionQueryService optionQueryService = beanManager.getReference(OptionQueryService.class);
@@ -84,27 +79,19 @@ private static void validateCommentFields(final JSONObject requestJSONObject) th
 
         final String commentContent = StringUtils.trim(requestJSONObject.optString(Comment.COMMENT_CONTENT));
         if (StringUtils.isBlank(commentContent) || commentContent.length() > Comment.MAX_COMMENT_CONTENT_LENGTH) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("commentErrorLabel")));
-        }
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("commentErrorLabel")));
+            context.abort();
 
-        if (optionQueryService.containReservedWord(commentContent)) {
-            throw new RequestProcessAdviceException(exception.put(Keys.MSG, langPropsService.get("contentContainReservedWordLabel")));
+            return;
         }
-    }
 
-    @Override
-    public void doAdvice(final RequestContext context) throws RequestProcessAdviceException {
-        final Request request = context.getRequest();
+        if (optionQueryService.containReservedWord(commentContent)) {
+            context.renderJSON(exception.put(Keys.MSG, langPropsService.get("contentContainReservedWordLabel")));
+            context.abort();
 
-        JSONObject requestJSONObject;
-        try {
-            requestJSONObject = context.requestJSON();
-            request.setAttribute(Keys.REQUEST, requestJSONObject);
-        } catch (final Exception e) {
-            throw new RequestProcessAdviceException(new JSONObject().put(Keys.MSG, e.getMessage()).
-                    put(Keys.STATUS_CODE, StatusCodes.ERR));
+            return;
         }
 
-        validateCommentFields(requestJSONObject);
+        context.handle();
     }
 }