diff --git a/server/wsproxy/jsondatamgr.cc b/server/wsproxy/jsondatamgr.cc
index d492587..6fafa4f 100644
--- a/server/wsproxy/jsondatamgr.cc
+++ b/server/wsproxy/jsondatamgr.cc
@@ -82,3 +82,14 @@ std::shared_ptr<a8::XObject> JsonDataMgr::GetMasterServerClusterConf()
 {
     return std::make_shared<a8::XObject>(masterserver_cluster_json_);
 }
+
+void JsonDataMgr::TraverseMaster(std::function<void (int, std::string, int)> cb)
+{
+    for (int i = 0; i < masterserver_cluster_json_.Size(); ++i) {
+        auto master_svr_conf = masterserver_cluster_json_.At(i);
+        int instance_id = master_svr_conf->At("instance_id")->AsXValue();
+        std::string remote_ip = master_svr_conf->At("ip")->AsXValue();
+        int remote_port = master_svr_conf->At("port")->AsXValue();
+        cb(instance_id, remote_ip, remote_port);
+    }
+}
diff --git a/server/wsproxy/jsondatamgr.h b/server/wsproxy/jsondatamgr.h
index ce0797e..f3ee7bd 100644
--- a/server/wsproxy/jsondatamgr.h
+++ b/server/wsproxy/jsondatamgr.h
@@ -14,6 +14,7 @@ class JsonDataMgr : public a8::Singleton<JsonDataMgr>
 
     std::shared_ptr<a8::XObject> GetConf();
     std::shared_ptr<a8::XObject> GetMasterServerClusterConf();
+    void TraverseMaster(std::function<void (int, std::string, int)> cb);
     std::string GetUdpHost() { return udp_host_; }
     int GetUdpPort() { return udp_port_; }