diff --git a/src/main/scala/service/ActivityService.scala b/src/main/scala/service/ActivityService.scala
index 59bdf48..f225482 100644
--- a/src/main/scala/service/ActivityService.scala
+++ b/src/main/scala/service/ActivityService.scala
@@ -25,50 +25,76 @@
   def recordCreateRepositoryActivity(userName: String, repositoryName: String, activityUserName: String): Unit =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "create_repository",
-      "[[%s]] created [[%s/%s]]".format(activityUserName, userName, repositoryName),
+      s"[user:${activityUserName}] created [repo:${userName}/${repositoryName}]",
       None,
       currentDate)
 
   def recordCreateIssueActivity(userName: String, repositoryName: String, activityUserName: String, issueId: Int, title: String): Unit =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "open_issue",
-      "[[%s]] opened issue [[%s/%s#%d]]".format(activityUserName, userName, repositoryName, issueId),
+      s"[user:${activityUserName}] opened issue [issue:${userName}/${repositoryName}#${issueId}]",
       Some(title), 
       currentDate)
 
   def recordCloseIssueActivity(userName: String, repositoryName: String, activityUserName: String, issueId: Int, title: String): Unit =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "close_issue",
-      "[[%s]] closed issue [[%s/%s#%d]]".format(activityUserName, userName, repositoryName, issueId),
+      s"[user:${activityUserName}] closed issue [issue:${userName}/${repositoryName}#${issueId}]",
       Some(title),
       currentDate)
 
   def recordReopenIssueActivity(userName: String, repositoryName: String, activityUserName: String, issueId: Int, title: String): Unit =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "reopen_issue",
-      "[[%s]] closed reopened [[%s/%s#%d]]".format(activityUserName, userName, repositoryName, issueId),
+      s"[user:${activityUserName}] closed reopened [issue:${userName}/${repositoryName}#${issueId}]",
       Some(title),
       currentDate)
 
   def recordCommentIssueActivity(userName: String, repositoryName: String, activityUserName: String, issueId: Int, comment: String): Unit =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "comment_issue",
-      "[[%s]] commented on issue [[%s/%s#%d]]".format(activityUserName, userName, repositoryName, issueId),
-      Some(comment),
+      s"[user:${activityUserName}] commented on issue [issue:${userName}/${repositoryName}#${issueId}]",
+      Some(cut(comment, 200)),
       currentDate)
   
   def recordCreateWikiPageActivity(userName: String, repositoryName: String, activityUserName: String, pageName: String) =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "create_wiki",
-      "[[%s]] created the [[%s/%s]] wiki".format(activityUserName, userName, repositoryName),
+      s"[user:${activityUserName}] created the [repo:${userName}/${repositoryName}] wiki",
       Some(pageName),
       currentDate)
   
   def recordEditWikiPageActivity(userName: String, repositoryName: String, activityUserName: String, pageName: String) =
     Activities.autoInc insert(userName, repositoryName, activityUserName,
       "edit_wiki",
-      "[[%s]] edited the [[%s/%s]] wiki".format(activityUserName, userName, repositoryName),
+      s"[user:${activityUserName}] edited the [repo:${userName}/${repositoryName}] wiki",
       Some(pageName),
       currentDate)
   
+  def recordPushActivity(userName: String, repositoryName: String, activityUserName: String, 
+      branchName: String, commits: List[util.JGitUtil.CommitInfo]) =
+    Activities.autoInc insert(userName, repositoryName, activityUserName,
+      "push",
+      s"[user:${activityUserName}] pushed to [branch:${userName}/${repositoryName}#${branchName}] at [repo:${userName}/${repositoryName}]",
+      Some(commits.map { commit => commit.id + ":" + commit.shortMessage }.mkString("\n")),
+      currentDate)
+  
+  def recordCreateTagActivity(userName: String, repositoryName: String, activityUserName: String, 
+      tagName: String, commits: List[util.JGitUtil.CommitInfo]) =
+    Activities.autoInc insert(userName, repositoryName, activityUserName,
+      "create_tag",
+      s"[user:${activityUserName}] created tag [tag:${userName}/${repositoryName}#${tagName}] at [repo:${userName}/${repositoryName}]",
+      None,
+      currentDate)
+  
+  def recordCreateBranchActivity(userName: String, repositoryName: String, activityUserName: String, 
+      branchName: String, commits: List[util.JGitUtil.CommitInfo]) =
+    Activities.autoInc insert(userName, repositoryName, activityUserName,
+      "create_tag",
+      s"[user:${activityUserName}] created branch [tag:${userName}/${repositoryName}#${branchName}] at [repo:${userName}/${repositoryName}]",
+      None,
+      currentDate)
+  
+  private def cut(value: String, length: Int): String = 
+    if(value.length > length) value.substring(0, length) + "..." else value
 }
diff --git a/src/main/scala/servlet/GitRepositoryServlet.scala b/src/main/scala/servlet/GitRepositoryServlet.scala
index c9d0394..61e6106 100644
--- a/src/main/scala/servlet/GitRepositoryServlet.scala
+++ b/src/main/scala/servlet/GitRepositoryServlet.scala
@@ -49,7 +49,7 @@
   
   override def create(request: HttpServletRequest, db: Repository): ReceivePack = {
     val receivePack = new ReceivePack(db)
-    val userName = request.getAttribute("USER_NAME")
+    val userName = request.getAttribute("USER_NAME").asInstanceOf[String]
 
     logger.debug("requestURI: " + request.getRequestURI)
     logger.debug("userName:" + userName)
@@ -60,29 +60,54 @@
     
     logger.debug("repository:" + owner + "/" + repository)
 
-    receivePack.setPostReceiveHook(new CommitLogHook(owner, repository))
+    receivePack.setPostReceiveHook(new CommitLogHook(owner, repository, userName))
     receivePack
   }
 }
 
 import scala.collection.JavaConverters._
 
-class CommitLogHook(owner: String, repository: String) extends PostReceiveHook
-  with RepositoryService with AccountService with IssuesService {
+class CommitLogHook(owner: String, repository: String, userName: String) extends PostReceiveHook
+  with RepositoryService with AccountService with IssuesService with ActivityService {
   
   private val logger = LoggerFactory.getLogger(classOf[CommitLogHook])
   
   def onPostReceive(receivePack: ReceivePack, commands: java.util.Collection[ReceiveCommand]): Unit = {
     JGitUtil.withGit(Directory.getRepositoryDir(owner, repository)) { git =>
       commands.asScala.foreach { command =>
-        JGitUtil.getCommitLog(git, command.getOldId.name, command.getNewId.name).foreach { commit =>
-          "(^|\\W)#(\\d+)(\\W|$)".r.findAllIn(commit.fullMessage).matchData.foreach { matchData =>
-            val issueId = matchData.group(2)
-            if(getAccountByUserName(commit.committer).isDefined && getIssue(owner, repository, issueId).isDefined){
-              createComment(owner, repository, commit.committer, issueId.toInt, commit.fullMessage, None)
+        val commits = JGitUtil.getCommitLog(git, command.getOldId.name, command.getNewId.name)
+          .filter(commit => JGitUtil.getBranchesOfCommit(git, commit.id).length == 1)
+        val refName = command.getRefName.split("/")
+        
+        println("****************************")
+        println(command.getRefName)
+        println(command.getMessage)
+        println(command.getResult)
+        println(command.getType)
+        println("****************************")
+        
+        // apply issue comment
+        if(refName(1) == "heads"){
+          commits.foreach { commit =>
+            "(^|\\W)#(\\d+)(\\W|$)".r.findAllIn(commit.fullMessage).matchData.foreach { matchData =>
+              val issueId = matchData.group(2)
+              if(getAccountByUserName(commit.committer).isDefined && getIssue(owner, repository, issueId).isDefined){
+                createComment(owner, repository, commit.committer, issueId.toInt, commit.fullMessage, None)
+              }
             }
           }
         }
+        
+        git.getRepository.getAllRefs.asScala.map { e =>
+          println(e._1)
+        }
+        
+        // record activity
+        if(refName(1) == "heads"){
+          recordPushActivity(owner, repository, userName, refName(2), commits)
+        } else if(refName(1) == "tags"){
+          recordCreateTagActivity(owner, repository, userName, refName(2), commits)
+        }
       }
     }
     // update repository last modified time.
diff --git a/src/main/scala/view/helpers.scala b/src/main/scala/view/helpers.scala
index 35086d3..db2d804 100644
--- a/src/main/scala/view/helpers.scala
+++ b/src/main/scala/view/helpers.scala
@@ -34,10 +34,14 @@
   }
 
   def activityMessage(message: String)(implicit context: app.Context): Html = {
+    val a = s"a $message aa $$1 a"
+    
     Html(message
-      .replaceAll("\\[\\[([^\\s]+?)/([^\\s]+?)#((\\d+))\\]\\]", "<a href=\"%s/$1/$2/issues/$3\">$1/$2#$3</a>".format(context.path))
-      .replaceAll("\\[\\[([^\\s]+?)/([^\\s]+?)\\]\\]", "<a href=\"%s/$1/$2\">$1/$2</a>".format(context.path))
-      .replaceAll("\\[\\[([^\\s]+?)\\]\\]", "<a href=\"%s/$1\">$1</a>".format(context.path))
+      .replaceAll("\\[issue:([^\\s]+?)/([^\\s]+?)#((\\d+))\\]"   , s"""<a href="${context.path}/$$1/$$2/issues/$$3">$$1/$$2#$$3</a>""")
+      .replaceAll("\\[repo:([^\\s]+?)/([^\\s]+?)\\]"             , s"""<a href="${context.path}/$$1/$$2\">$$1/$$2</a>""")
+      .replaceAll("\\[branch:([^\\s]+?)/([^\\s]+?)#([^\\s]+?)\\]", s"""<a href="${context.path}/$$1/$$2/tree/$$3">$$3</a>""")
+      .replaceAll("\\[tag:([^\\s]+?)/([^\\s]+?)#([^\\s]+?)\\]"   , s"""<a href="${context.path}/$$1/$$2/tree/$$3">$$3</a>""")
+      .replaceAll("\\[user:([^\\s]+?)\\]"                        , s"""<a href="${context.path}/$$1">$$1</a>""")
     )
   }
 
diff --git a/src/main/twirl/account/activity.scala.html b/src/main/twirl/account/activity.scala.html
index fedb46c..e5008c8 100644
--- a/src/main/twirl/account/activity.scala.html
+++ b/src/main/twirl/account/activity.scala.html
@@ -30,6 +30,16 @@
                   case "edit_wiki" => {
                     <div>Edited <a href={"%s/%s/%s/wiki/%s".format(path, activity.userName, activity.repositoryName, additionalInfo)}>{additionalInfo}</a>.</div>
                   }
+                  case "push" => {
+                    <div>
+                      {additionalInfo.split("\n").map{ commit => 
+                        <div>
+                          <a href={"%s/%s/%s/commit/%s".format(path, activity.userName, activity.repositoryName, commit.substring(0, 40))} class="monospace">{commit.substring(0, 7)}</a>
+                          <span>{commit.substring(41)}</span>
+                        </div>
+                      }}
+                    </div>
+                  }
                   case _ => {
                     <div>{additionalInfo}</div>
                   }