updates codes to sync with the latest 2.4 spin code
[platform/core/uifw/stt.git] / client / stt_dbus.c
index f453a45..a7fc25d 100644 (file)
@@ -1,5 +1,5 @@
 /*
-*  Copyright (c) 2011-2014 Samsung Electronics Co., Ltd All Rights Reserved 
+*  Copyright (c) 2011-2014 Samsung Electronics Co., Ltd All Rights Reserved
 *  Licensed under the Apache License, Version 2.0 (the "License");
 *  you may not use this file except in compliance with the License.
 *  You may obtain a copy of the License at
@@ -23,7 +23,8 @@ static int g_waiting_short_time = 500;
 
 static Ecore_Fd_Handler* g_fd_handler = NULL;
 
-static DBusConnection* g_conn = NULL;
+static DBusConnection* g_conn_sender = NULL;
+static DBusConnection* g_conn_listener = NULL;
 
 
 extern int __stt_cb_error(int uid, int reason);
@@ -32,313 +33,294 @@ extern int __stt_cb_result(int uid, int event, char** data, int data_count, cons
 
 extern int __stt_cb_set_state(int uid, int state);
 
+extern int __stt_cb_set_volume(int uid, float volume);
+
 static Eina_Bool listener_event_callback(void* data, Ecore_Fd_Handler *fd_handler)
 {
-       DBusConnection* conn = (DBusConnection*)data;
-       DBusMessage* msg = NULL;
-       DBusMessage *reply = NULL;
+       if (NULL == g_conn_listener)    return ECORE_CALLBACK_RENEW;
 
-       if (NULL == conn)
-               return ECORE_CALLBACK_RENEW;
+       dbus_connection_read_write_dispatch(g_conn_listener, 50);
 
-       dbus_connection_read_write_dispatch(conn, 50);
+       while (1) {
+               DBusMessage* msg = NULL;
+               msg = dbus_connection_pop_message(g_conn_listener);
 
-       msg = dbus_connection_pop_message(conn);
+               if (true != dbus_connection_get_is_connected(g_conn_listener)) {
+                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is disconnected");
+                       break;
+               }
 
-       if (true != dbus_connection_get_is_connected(conn)) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Conn is disconnected");
-               return ECORE_CALLBACK_RENEW;
-       }
+               /* loop again if we haven't read a message */
+               if (NULL == msg) {
+                       break;
+               }
 
-       /* loop again if we haven't read a message */
-       if (NULL == msg) { 
-               return ECORE_CALLBACK_RENEW;
-       }
+               SLOG(LOG_DEBUG, TAG_STTC, "[DEBUG] Message is arrived");
 
-       DBusError err;
-       dbus_error_init(&err);
+               DBusError err;
+               dbus_error_init(&err);
 
-       char if_name[64];
-       snprintf(if_name, 64, "%s%d", STT_CLIENT_SERVICE_INTERFACE, getpid());
+               DBusMessage *reply = NULL;
 
-       if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_HELLO)) {
-               SLOG(LOG_DEBUG, TAG_STTC, "===== Get Hello");
-               int uid = 0;
-               int response = -1;
+               char if_name[64];
+               snprintf(if_name, 64, "%s%d", STT_CLIENT_SERVICE_INTERFACE, getpid());
 
-               dbus_message_get_args(msg, &err, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID);
-               if (dbus_error_is_set(&err)) {
-                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
-                       dbus_error_free(&err);
-               }
+               if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_HELLO)) {
+                       SLOG(LOG_DEBUG, TAG_STTC, "===== Get Hello");
+                       int uid = 0;
+                       int response = -1;
 
-               if (uid > 0) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get hello : uid(%d)", uid);
-                       
-                       /* check uid */
-                       stt_client_s* client = stt_client_get_by_uid(uid);
-                       if( NULL != client ) 
-                               response = 1;
-                       else 
-                               response = 0;
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get hello : invalid uid");
-               }
+                       dbus_message_get_args(msg, &err, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID);
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                       }
 
-               reply = dbus_message_new_method_return(msg);
-               
-               if (NULL != reply) {
-                       dbus_message_append_args(reply, DBUS_TYPE_INT32, &response, DBUS_TYPE_INVALID);
+                       if (uid > 0) {
+                               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get hello : uid(%d)", uid);
 
-                       if (!dbus_connection_send(conn, reply, NULL))
-                               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get hello : fail to send reply");
-                       else 
-                               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get hello : result(%d)", response);
+                               /* check uid */
+                               stt_client_s* client = stt_client_get_by_uid(uid);
+                               if (NULL != client)
+                                       response = 1;
+                               else
+                                       response = 0;
+                       }
+                       else {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get hello : invalid uid");
+                       }
 
-                       dbus_connection_flush(conn);
-                       dbus_message_unref(reply); 
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get hello : fail to create reply message");
-               }
-               
-               SLOG(LOG_DEBUG, TAG_STTC, "=====");
-               SLOG(LOG_DEBUG, TAG_STTC, " ");
-       } /* STTD_METHOD_HELLO */
-
-       else if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_SET_STATE)) {
-               SLOG(LOG_DEBUG, TAG_STTC, "===== Set State");
-               int uid = 0;
-               int response = -1;
-               int state = -1;
-
-               dbus_message_get_args(msg, &err, 
-                       DBUS_TYPE_INT32, &uid, 
-                       DBUS_TYPE_INT32, &state,
-                       DBUS_TYPE_INVALID);
+                       reply = dbus_message_new_method_return(msg);
 
-               if (dbus_error_is_set(&err)) {
-                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
-                       dbus_error_free(&err);
-               }
-
-               if (uid > 0 && state >= 0) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set state : uid(%d), state(%d)", uid, state);
+                       if (NULL != reply) {
+                               dbus_message_append_args(reply, DBUS_TYPE_INT32, &response, DBUS_TYPE_INVALID);
 
-                       response = __stt_cb_set_state(uid, state);
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt set state : invalid uid or state");
-               }
+                               if (!dbus_connection_send(g_conn_listener, reply, NULL))
+                                       SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get hello : fail to send reply");
+                               else
+                                       SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get hello : result(%d)", response);
 
-               reply = dbus_message_new_method_return(msg);
+                               dbus_connection_flush(g_conn_listener);
+                               dbus_message_unref(reply);
+                       }
+                       else {
+                               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get hello : fail to create reply message");
+                       }
 
-               if (NULL != reply) {
-                       dbus_message_append_args(reply, DBUS_TYPE_INT32, &response, DBUS_TYPE_INVALID);
+                       SLOG(LOG_DEBUG, TAG_STTC, "=====");
+                       SLOG(LOG_DEBUG, TAG_STTC, " ");
+               } /* STTD_METHOD_HELLO */
 
-                       if (!dbus_connection_send(conn, reply, NULL)) {
-                               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set state : fail to send reply");
-                       }
+               else if (dbus_message_is_signal(msg, if_name, STTD_METHOD_SET_STATE)) {
+                       SLOG(LOG_DEBUG, TAG_STTC, "===== Set State");
+                       int uid = 0;
+                       int state = -1;
 
-                       dbus_connection_flush(conn);
-                       dbus_message_unref(reply); 
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set state : fail to create reply message");
-               }
+                       dbus_message_get_args(msg, &err,
+                               DBUS_TYPE_INT32, &uid,
+                               DBUS_TYPE_INT32, &state,
+                               DBUS_TYPE_INVALID);
 
-               SLOG(LOG_DEBUG, TAG_STTC, "=====");
-               SLOG(LOG_DEBUG, TAG_STTC, " ");
-       } /* STTD_METHOD_SET_STATE */
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                       }
 
-       else if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_GET_STATE)) {
-               SLOG(LOG_DEBUG, TAG_STTC, "===== Get state");
-               int uid = 0;
-               int response = -1;
+                       if (uid > 0 && state >= 0) {
+                               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set state : uid(%d), state(%d)", uid, state);
+                               __stt_cb_set_state(uid, state);
+                       }
+                       else {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< stt set state : invalid uid or state");
+                       }
 
-               dbus_message_get_args(msg, &err, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID);
+                       SLOG(LOG_DEBUG, TAG_STTC, "=====");
+                       SLOG(LOG_DEBUG, TAG_STTC, " ");
+               } /* STTD_METHOD_SET_STATE */
 
-               if (dbus_error_is_set(&err)) {
-                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
-                       dbus_error_free(&err);
-               }
+               else if (dbus_message_is_signal(msg, if_name, STTD_METHOD_SET_VOLUME)) {
+                       SLOG(LOG_DEBUG, TAG_STTC, "===== Set volume : signal");
+                       int uid = 0;
+                       float volume = 0;
 
-               if (uid > 0) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get state : uid(%d)", uid);
+                       dbus_message_get_args(msg, &err,
+                               DBUS_TYPE_INT32, &uid,
+                               DBUS_TYPE_INT32, &volume,
+                               DBUS_TYPE_INVALID);
 
-                       /* check state */
-                       stt_client_s* client = stt_client_get_by_uid(uid);
-                       if( NULL != client ) 
-                               response = client->current_state;
-                       else 
-                               SLOG(LOG_ERROR, TAG_STTC, "invalid uid");
-                       
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get state : invalid uid");
-               }
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                       }
 
-               reply = dbus_message_new_method_return(msg);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set volume : uid(%d), volume(%f)", uid, volume); 
+                       __stt_cb_set_volume(uid, volume);
 
-               if (NULL != reply) {
-                       dbus_message_append_args(reply, DBUS_TYPE_INT32, &response, DBUS_TYPE_INVALID);
+                       /* SLOG(LOG_DEBUG, TAG_STTC, "====="); */
+                       /* SLOG(LOG_DEBUG, TAG_STTC, " "); */
+               } /* STTD_METHOD_SET_VOLUME */
 
-                       if (!dbus_connection_send(conn, reply, NULL))
-                               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get state : fail to send reply");
-                       else 
-                               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get state : result(%d)", response);
+               else if (dbus_message_is_signal(msg, if_name, STTD_METHOD_RESULT)) {
+                       SLOG(LOG_DEBUG, TAG_STTC, "===== Get Result : signal");
+                       int uid = 0;
+                       DBusMessageIter args;
 
-                       dbus_connection_flush(conn);
-                       dbus_message_unref(reply); 
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get hello : fail to create reply message");
-               }
+                       dbus_message_iter_init(msg, &args);
 
-               SLOG(LOG_DEBUG, TAG_STTC, "=====");
-               SLOG(LOG_DEBUG, TAG_STTC, " ");
-       } /* STTD_METHOD_GET_STATE */
-
-       else if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_RESULT)) {
-               SLOG(LOG_DEBUG, TAG_STTC, "===== Get Result");
-               int uid = 0;
-               DBusMessageIter args;
-                       
-               dbus_message_iter_init(msg, &args);
-               
-               /* Get result */
-               if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
-                       dbus_message_iter_get_basic(&args, &uid);
-                       dbus_message_iter_next(&args);
-               }
-               
-               if (uid > 0) {
-                       char** temp_result = NULL;
-                       char* temp_msg = NULL;
-                       char* temp_char = NULL;
-                       int temp_event = 0;
-                       int temp_count = 0;
-
-                       /* Get recognition type */
+                       /* Get result */
                        if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
-                               dbus_message_iter_get_basic(&args, &temp_event);
+                               dbus_message_iter_get_basic(&args, &uid);
                                dbus_message_iter_next(&args);
                        }
 
-                       if (DBUS_TYPE_STRING == dbus_message_iter_get_arg_type(&args)) {
-                               dbus_message_iter_get_basic(&args, &(temp_msg) );
-                               dbus_message_iter_next(&args);
-                       }
+                       stt_client_s* client = NULL;
+                       client = stt_client_get_by_uid(uid);
+                       if (NULL != client) {
+                               char** temp_result = NULL;
+                               char* temp_msg = NULL;
+                               char* temp_char = NULL;
+                               int temp_event = 0;
+                               int temp_count = 0;
+                               int temp_result_id = 0;
+
+                               /* Get recognition type */
+                               if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
+                                       dbus_message_iter_get_basic(&args, &temp_event);
+                                       dbus_message_iter_next(&args);
+                               }
 
-                       /* Get voice size */
-                       if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
-                               dbus_message_iter_get_basic(&args, &temp_count);
-                               dbus_message_iter_next(&args);
-                       }
+                               if (DBUS_TYPE_STRING == dbus_message_iter_get_arg_type(&args)) {
+                                       dbus_message_iter_get_basic(&args, &(temp_msg));
+                                       dbus_message_iter_next(&args);
+                               }
+
+                               /* Get voice size */
+                               if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
+                                       dbus_message_iter_get_basic(&args, &temp_count);
+                                       dbus_message_iter_next(&args);
+                               }
 
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get result : uid(%d) event(%d) message(%s) count(%d)", 
-                               uid, temp_event, temp_msg, temp_count);
+                               /* Get result id */
+                               if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
+                                       dbus_message_iter_get_basic(&args, &temp_result_id);
+                                       dbus_message_iter_next(&args);
+                               }
 
-                       if (temp_count <= 0) {
-                               __stt_cb_result(uid, temp_event, NULL, 0, temp_msg);
-                       } else {
-                               temp_result = (char**)calloc(temp_count, sizeof(char*));
+                               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get result : uid(%d) event(%d) message(%s) count(%d) result id(%d)",
+                                       uid, temp_event, temp_msg, temp_count, temp_result_id);
 
-                               if (NULL == temp_result)        {
-                                       SLOG(LOG_ERROR, TAG_STTC, "Fail : memory allocation error");
+                               if (temp_count <= 0) {
+                                       __stt_cb_result(uid, temp_event, NULL, 0, temp_msg);
                                } else {
-                                       int i = 0;
-                                       for (i = 0;i < temp_count;i++) {
-                                               dbus_message_iter_get_basic(&args, &(temp_char) );
-                                               dbus_message_iter_next(&args);
-
-                                               if (NULL != temp_char) {
-                                                       temp_result[i] = strdup(temp_char);
-                                                       SLOG(LOG_DEBUG, TAG_STTC, "result[%d] : %s", i, temp_result[i]);
+                                       temp_result = (char**)calloc(temp_count, sizeof(char*));
+
+                                       if (NULL == temp_result)        {
+                                               SLOG(LOG_ERROR, TAG_STTC, "Fail : memory allocation error");
+                                       } else {
+                                               int i = 0;
+                                               for (i = 0; i < temp_count; i++) {
+                                                       dbus_message_iter_get_basic(&args, &(temp_char));
+                                                       dbus_message_iter_next(&args);
+
+                                                       if (NULL != temp_char) {
+                                                               temp_result[i] = strdup(temp_char);
+                                                               SLOG(LOG_DEBUG, TAG_STTC, "result[%d] : %s", i, temp_result[i]);
+                                                       }
                                                }
-                                       }
 
-                                       __stt_cb_result(uid, temp_event, temp_result, temp_count, temp_msg);
+                                               __stt_cb_result(uid, temp_event, temp_result, temp_count, temp_msg);
 
-                                       for (i = 0;i < temp_count;i++) {
-                                               if (NULL != temp_result[i])
-                                                       free(temp_result[i]);
-                                       }
+                                               for (i = 0; i < temp_count; i++) {
+                                                       if (NULL != temp_result[i])
+                                                               free(temp_result[i]);
+                                               }
 
-                                       free(temp_result);
+                                               free(temp_result);
+                                       }
                                }
+                       } else {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get result : invalid uid");
                        }
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get result : invalid uid");
-               }
 
-               SLOG(LOG_DEBUG, TAG_STTC, "=====");
-               SLOG(LOG_DEBUG, TAG_STTC, " ");
-       }/* STTD_METHOD_RESULT */
+                       SLOG(LOG_DEBUG, TAG_STTC, "=====");
+                       SLOG(LOG_DEBUG, TAG_STTC, " ");
+               }/* STTD_METHOD_RESULT */
 
-       else if (dbus_message_is_method_call(msg, if_name, STTD_METHOD_ERROR)) {
-               SLOG(LOG_DEBUG, TAG_STTC, "===== Get Error");
-               int uid;
-               int reason;
-               char* err_msg;
+               else if (dbus_message_is_signal(msg, if_name, STTD_METHOD_ERROR)) {
+                       SLOG(LOG_DEBUG, TAG_STTC, "===== Get Error");
+                       int uid;
+                       int reason;
+                       char* err_msg;
 
-               dbus_message_get_args(msg, &err,
-                       DBUS_TYPE_INT32, &uid,
-                       DBUS_TYPE_INT32, &reason,
-                       DBUS_TYPE_STRING, &err_msg,
-                       DBUS_TYPE_INVALID);
-
-               if (dbus_error_is_set(&err)) { 
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt Get Error message : Get arguments error (%s)\n", err.message);
-                       dbus_error_free(&err); 
-               } else {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt Get Error message : uid(%d), reason(%d), msg(%s)\n", uid, reason, err_msg);
-                       __stt_cb_error(uid, reason);
-               }
+                       dbus_message_get_args(msg, &err,
+                               DBUS_TYPE_INT32, &uid,
+                               DBUS_TYPE_INT32, &reason,
+                               DBUS_TYPE_STRING, &err_msg,
+                               DBUS_TYPE_INVALID);
 
-               reply = dbus_message_new_method_return(msg);
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< stt Get Error message : Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                       }
+                       else {
+                               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt Get Error message : uid(%d), reason(%d), msg(%s)", uid, reason, err_msg);
+                               __stt_cb_error(uid, reason);
+                       }
 
-               if (NULL != reply) {
-                       if (!dbus_connection_send(conn, reply, NULL))
-                               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt Error message : fail to send reply");
-                       else 
-                               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt Error message");
+                       SLOG(LOG_DEBUG, TAG_STTC, "=====");
+                       SLOG(LOG_DEBUG, TAG_STTC, " ");
+               }/* STTD_METHOD_ERROR */
 
-                       dbus_connection_flush(conn);
-                       dbus_message_unref(reply); 
-               } else {
-                       SLOG(LOG_ERROR, TAG_STTC, ">>>> stt Error message : fail to create reply message");
+               else {
+                       SLOG(LOG_DEBUG, TAG_STTC, "Message is NOT valid");
+                       dbus_message_unref(msg);
+                       break;
                }
 
-               SLOG(LOG_DEBUG, TAG_STTC, "=====");
-               SLOG(LOG_DEBUG, TAG_STTC, " ");
-       }/* STTD_METHOD_ERROR */
-
-       /* free the message */
-       dbus_message_unref(msg);
+               /* free the message */
+               dbus_message_unref(msg);
+       }/* while */
 
-       return ECORE_CALLBACK_PASS_ON;
+       return ECORE_CALLBACK_RENEW;
 }
 
 int stt_dbus_open_connection()
 {
-       if (NULL != g_conn) {
+       if (NULL != g_conn_sender && NULL != g_conn_listener) {
                SLOG(LOG_WARN, TAG_STTC, "already existed connection ");
                return 0;
        }
 
        DBusError err;
-       int ret;
 
        /* initialise the error value */
        dbus_error_init(&err);
 
        /* connect to the DBUS system bus, and check for errors */
-       g_conn = dbus_bus_get_private(DBUS_BUS_SYSTEM, &err);
+       g_conn_sender = dbus_bus_get_private(DBUS_BUS_SESSION, &err);
+       if (dbus_error_is_set(&err)) {
+               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Dbus Connection Error (%s)", err.message);
+               dbus_error_free(&err);
+       }
+
+       if (NULL == g_conn_sender) {
+               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] fail to get dbus connection");
+               return STT_ERROR_OPERATION_FAILED;
+       }
+
+       dbus_connection_set_exit_on_disconnect(g_conn_sender, false);
+
+       /* connect to the DBUS system bus, and check for errors */
+       g_conn_listener = dbus_bus_get_private(DBUS_BUS_SESSION, &err);
 
        if (dbus_error_is_set(&err)) { 
-               SLOG(LOG_ERROR, TAG_STTC, "Dbus Connection Error (%s)\n", err.message); 
+               SLOG(LOG_ERROR, TAG_STTC, "Dbus Connection Error (%s)", err.message); 
                dbus_error_free(&err);
        }
 
-       if (NULL == g_conn) {
+       if (NULL == g_conn_listener) {
                SLOG(LOG_ERROR, TAG_STTC, "Fail to get dbus connection");
-               return STT_ERROR_OPERATION_FAILED; 
+               return STT_ERROR_OPERATION_FAILED;
        }
 
        int pid = getpid();
@@ -347,49 +329,38 @@ int stt_dbus_open_connection()
        memset(service_name, '\0', 64);
        snprintf(service_name, 64, "%s%d", STT_CLIENT_SERVICE_NAME, pid);
 
-       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "service name is %s\n", service_name);
+       SLOG(LOG_DEBUG, TAG_STTC, "service name is %s", service_name);
 
        /* register our name on the bus, and check for errors */
-       ret = dbus_bus_request_name(g_conn, service_name, DBUS_NAME_FLAG_REPLACE_EXISTING , &err);
+       dbus_bus_request_name(g_conn_listener, service_name, DBUS_NAME_FLAG_REPLACE_EXISTING , &err);
 
        if (dbus_error_is_set(&err)) {
-               SLOG(LOG_ERROR, TAG_STTC, "Name Error (%s)\n", err.message); 
+               SLOG(LOG_ERROR, TAG_STTC, "Name Error (%s)", err.message); 
                dbus_error_free(&err); 
        }
 
-       if (DBUS_REQUEST_NAME_REPLY_PRIMARY_OWNER != ret) {
-               SLOG(LOG_ERROR, TAG_STTC, "[Dbus ERROR] Fail to be primary owner");
-               return -2;
-       }
-
-       if( NULL != g_fd_handler ) {
-               SLOG(LOG_WARN, TAG_STTC, "The handler already exists.");
-               return 0;
-       }
-
-       char rule[128];
+       char rule[128] = {0, };
        snprintf(rule, 128, "type='signal',interface='%s%d'", STT_CLIENT_SERVICE_INTERFACE, pid);
 
        /* add a rule for which messages we want to see */
-       dbus_bus_add_match(g_conn, rule, &err); 
-       dbus_connection_flush(g_conn);
+       dbus_bus_add_match(g_conn_listener, rule, &err);
+       dbus_connection_flush(g_conn_listener);
 
-       if (dbus_error_is_set(&err)) { 
-               SLOG(LOG_ERROR, TAG_STTC, "Match Error (%s)\n", err.message);
+       if (dbus_error_is_set(&err)) {
+               SLOG(LOG_ERROR, TAG_STTC, "Match Error (%s)", err.message);
                dbus_error_free(&err);
-               return STT_ERROR_OPERATION_FAILED; 
+               return STT_ERROR_OPERATION_FAILED;
        }
 
        int fd = 0;
-       if (1 != dbus_connection_get_unix_fd(g_conn, &fd)) {
-               SLOG(LOG_ERROR, TAG_STTC, "fail to get fd from dbus");
+       if (true != dbus_connection_get_unix_fd(g_conn_listener, &fd)) {
+               SLOG(LOG_ERROR, TAG_STTC, "Fail to get fd from dbus");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, "Get fd from dbus : %d\n", fd);
+               SLOG(LOG_DEBUG, TAG_STTC, "Get fd from dbus : %d", fd);
        }
 
-       g_fd_handler = ecore_main_fd_handler_add(fd, ECORE_FD_READ, (Ecore_Fd_Cb)listener_event_callback, g_conn, NULL, NULL);
-
+       g_fd_handler = ecore_main_fd_handler_add(fd, ECORE_FD_READ, (Ecore_Fd_Cb)listener_event_callback, g_conn_listener, NULL, NULL);
        if (NULL == g_fd_handler) {
                SLOG(LOG_ERROR, TAG_STTC, "fail to get fd handler from ecore");
                return STT_ERROR_OPERATION_FAILED;
@@ -403,43 +374,50 @@ int stt_dbus_close_connection()
        DBusError err;
        dbus_error_init(&err);
 
+       if (NULL != g_fd_handler) {
+               ecore_main_fd_handler_del(g_fd_handler);
+               g_fd_handler = NULL;
+       }
+
        int pid = getpid();
 
        char service_name[64];
        memset(service_name, '\0', 64);
        snprintf(service_name, 64, "%s%d", STT_CLIENT_SERVICE_NAME, pid);
 
-       dbus_bus_release_name (g_conn, service_name, &err);
-
+       dbus_bus_release_name(g_conn_listener, service_name, &err);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Release name Error (%s)", err.message);
                dbus_error_free(&err);
        }
 
-       dbus_connection_close(g_conn);
+       dbus_connection_close(g_conn_sender);
+       dbus_connection_close(g_conn_listener);
 
-       g_fd_handler = NULL;
-       g_conn = NULL;
+       g_conn_sender = NULL;
+       g_conn_listener = NULL;
 
        return 0;
 }
 
 int stt_dbus_reconnect()
 {
-       bool connected = dbus_connection_get_is_connected(g_conn);
-       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "[DBUS] %s", connected ? "Connected" : "Not connected");
+       bool sender_connected = dbus_connection_get_is_connected(g_conn_sender);
+       bool listener_connected = dbus_connection_get_is_connected(g_conn_listener);
+       SLOG(LOG_DEBUG, TAG_STTC, "[DBUS] Sender(%s) Listener(%s)",
+               sender_connected ? "Connected" : "Not connected", listener_connected ? "Connected" : "Not connected");
 
-       if (false == connected) {
+       if (false == sender_connected || false == listener_connected) {
                stt_dbus_close_connection();
 
-               if(0 != stt_dbus_open_connection()) {
+               if (0 != stt_dbus_open_connection()) {
                        SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Fail to reconnect");
                        return -1;
-               } 
+               }
 
                SLOG(LOG_DEBUG, TAG_STTC, "[DBUS] Reconnect");
        }
-       
+
        return 0;
 }
 
@@ -453,46 +431,39 @@ int stt_dbus_request_hello()
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_HELLO);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> Request stt hello : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> Request stt hello : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
-       } 
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
        }
 
        DBusError err;
        dbus_error_init(&err);
 
        DBusMessage* result_msg = NULL;
-       int result = STT_DAEMON_NORMAL;
-
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_short_time, &err);
-       dbus_message_unref(msg);
-       if (dbus_error_is_set(&err)) {
-               dbus_error_free(&err);
-       }
-
-       int status = 0;
-       if (NULL != result_msg) {
-               dbus_message_get_args(result_msg, &err,
-                               DBUS_TYPE_INT32, &status,
-                               DBUS_TYPE_INVALID);
-
-               dbus_message_unref(result_msg);
+       int result = 0;
 
+       if(g_conn_sender) {
+               result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_short_time, &err);
+               dbus_message_unref(msg);
                if (dbus_error_is_set(&err)) {
-                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
                        dbus_error_free(&err);
                }
 
-               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt hello - %d", status);
-               result = status;
-       } else {
-               result = STT_ERROR_TIMED_OUT;
+               if (NULL != result_msg) {
+                       dbus_message_unref(result_msg);
+
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                       }
+
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt hello");
+               } else {
+                       result = STT_ERROR_TIMED_OUT;
+               }
+       }else {
+               SLOG(LOG_WARN, TAG_STTC, "[WARN] dbus connection handle is null (%p)", g_conn_sender);
+               result = STT_ERROR_OPERATION_FAILED;
        }
 
        return result;
@@ -509,21 +480,15 @@ int stt_dbus_request_initialize(int uid, bool* silence_supported)
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_INITIALIZE);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt initialize : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt initialize : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt initialize : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt initialize : uid(%d)", uid);
        }
 
        int pid = getpid();
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &pid,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_INVALID);
@@ -534,37 +499,42 @@ int stt_dbus_request_initialize(int uid, bool* silence_supported)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
-       dbus_message_unref(msg);
-       if (dbus_error_is_set(&err)) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
-               dbus_error_free(&err);
-       }
+       if(g_conn_sender) {
+               result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
+               dbus_message_unref(msg);
+               if (dbus_error_is_set(&err)) {
+                       SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
+                       dbus_error_free(&err);
+               }
 
-       if (NULL != result_msg) {
-               dbus_message_get_args(result_msg, &err, 
-                       DBUS_TYPE_INT32, &result, 
-                       DBUS_TYPE_INT32, silence_supported,
-                       DBUS_TYPE_INVALID);
+               if (NULL != result_msg) {
+                       dbus_message_get_args(result_msg, &err,
+                               DBUS_TYPE_INT32, &result,
+                               DBUS_TYPE_INT32, silence_supported,
+                               DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)\n", err.message);
-                       dbus_error_free(&err); 
-                       result = STT_ERROR_OPERATION_FAILED;
-               }
+                       if (dbus_error_is_set(&err)) {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
+                               dbus_error_free(&err);
+                               result = STT_ERROR_OPERATION_FAILED;
+                       }
 
-               if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt initialize : result = %d, silence(%d)",
-                               result, *silence_supported);
+                       if (0 == result) {
+                               SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt initialize : result = %d, silence(%d)",
+                                       result, *silence_supported);
+                       } else {
+                               SLOG(LOG_ERROR, TAG_STTC, "<<<< stt initialize : result = %d", result);
+                       }
+
+                       dbus_message_unref(result_msg);
                } else {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< stt initialize : result = %d", result);
+                       SLOG(LOG_ERROR, TAG_STTC, "<<<< Result message is NULL");
+                       stt_dbus_reconnect();
+                       result = STT_ERROR_TIMED_OUT;
                }
-
-               dbus_message_unref(result_msg);
        } else {
-               SLOG(LOG_ERROR, TAG_STTC, "<<<< Result message is NULL");
-               stt_dbus_reconnect();
-               result = STT_ERROR_TIMED_OUT;
+               SLOG(LOG_WARN, TAG_STTC, "[WARN] dbus connection handle is null (%p)", g_conn_sender);
+               result = STT_ERROR_OPERATION_FAILED;
        }
 
        return result;
@@ -580,17 +550,11 @@ int stt_dbus_request_finalize(int uid)
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_FINALIZE);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt finalize : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt finalize : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt finalize : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt finalize : uid(%d)", uid);
        }
 
        dbus_message_append_args(msg, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID);
@@ -601,7 +565,7 @@ int stt_dbus_request_finalize(int uid)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_short_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_short_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -613,9 +577,9 @@ int stt_dbus_request_finalize(int uid)
                                DBUS_TYPE_INT32, &result,
                                DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
 
@@ -645,20 +609,14 @@ int stt_dbus_request_set_current_engine(int uid, const char* engine_id, bool* si
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_SET_CURRENT_ENGINE);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set engine : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set engine : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set engine : uid(%d)", uid);
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set engine : uid(%d)", uid);
        }
 
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
-       }
-
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_STRING, &engine_id,
                DBUS_TYPE_INVALID);
@@ -669,7 +627,7 @@ int stt_dbus_request_set_current_engine(int uid, const char* engine_id, bool* si
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -683,7 +641,7 @@ int stt_dbus_request_set_current_engine(int uid, const char* engine_id, bool* si
                        DBUS_TYPE_INVALID);
 
                if (dbus_error_is_set(&err)) {
-                       SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)\n", err.message);
+                       SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
                        dbus_error_free(&err); 
                        result = STT_ERROR_OPERATION_FAILED;
                }
@@ -691,7 +649,7 @@ int stt_dbus_request_set_current_engine(int uid, const char* engine_id, bool* si
                dbus_message_unref(result_msg);
 
                if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set engine : result = %d , silence(%d)", 
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set engine : result = %d , silence(%d)", 
                                result, *silence_supported);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt set engine : result = %d", result);
@@ -724,13 +682,7 @@ int stt_dbus_request_check_app_agreed(int uid, const char* appid, bool* value)
                SLOG(LOG_ERROR, TAG_STTC, ">>>> stt check app agreed : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt check app agreed : uid(%d) appid(%s)", uid, appid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt check app agreed : uid(%d) appid(%s)", uid, appid);
        }
 
        dbus_message_append_args(msg,
@@ -745,7 +697,7 @@ int stt_dbus_request_check_app_agreed(int uid, const char* appid, bool* value)
        int result = STT_ERROR_OPERATION_FAILED;
        int available = -1;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -760,14 +712,14 @@ int stt_dbus_request_check_app_agreed(int uid, const char* appid, bool* value)
 
                if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
                        *value = (bool)available;
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt check app agreed : result = %d, available = %d", result, *value);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt check app agreed : result = %d, available = %d", result, *value);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt check app agreed : result = %d", result);
                }
@@ -795,17 +747,11 @@ int stt_dbus_request_get_support_langs(int uid, stt_h stt, stt_supported_languag
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_GET_SUPPORT_LANGS);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get supported languages : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get supported languages : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get supported languages : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get supported languages : uid(%d)", uid);
        }
 
        dbus_message_append_args(msg, DBUS_TYPE_INT32, &uid, DBUS_TYPE_INVALID);
@@ -817,7 +763,7 @@ int stt_dbus_request_get_support_langs(int uid, stt_h stt, stt_supported_languag
        DBusMessageIter args;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err );
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -836,7 +782,7 @@ int stt_dbus_request_get_support_langs(int uid, stt_h stt, stt_supported_languag
                                SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get support languages : result = %d", result);
 
                                /* Get voice size */
-                               int size = 0; 
+                               int size = 0;
                                if (DBUS_TYPE_INT32 == dbus_message_iter_get_arg_type(&args)) {
                                        dbus_message_iter_get_basic(&args, &size);
                                        dbus_message_iter_next(&args);
@@ -845,10 +791,10 @@ int stt_dbus_request_get_support_langs(int uid, stt_h stt, stt_supported_languag
                                if (0 >= size) {
                                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt size of language error : size = %d", size);
                                } else {
-                                       int i=0;
+                                       int i = 0;
                                        char* temp_lang;
 
-                                       for (i=0 ; i<size ; i++) {
+                                       for (i = 0; i < size; i++) {
                                                dbus_message_iter_get_basic(&args, &(temp_lang));
                                                dbus_message_iter_next(&args);
 
@@ -860,7 +806,7 @@ int stt_dbus_request_get_support_langs(int uid, stt_h stt, stt_supported_languag
                        } else {
                                SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get support languages : result = %d", result);
                        }
-               } 
+               }
                dbus_message_unref(result_msg);
        } else {
                SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get support languages : result message is NULL");
@@ -886,20 +832,14 @@ int stt_dbus_request_get_default_lang(int uid, char** language)
                STT_SERVER_SERVICE_INTERFACE, 
                STT_METHOD_GET_CURRENT_LANG);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get default language : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt get default language : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get default language  : uid(%d)", uid);
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt get default language  : uid(%d)", uid);
        }
 
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
-       }
-
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_INVALID);
 
@@ -910,7 +850,7 @@ int stt_dbus_request_get_default_lang(int uid, char** language)
        int result = STT_ERROR_OPERATION_FAILED;
        char* temp_lang = NULL;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -923,16 +863,16 @@ int stt_dbus_request_get_default_lang(int uid, char** language)
                        DBUS_TYPE_STRING, &temp_lang,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
                        *language = strdup(temp_lang);
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get default language : result = %d, language = %s", result, *language);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt get default language : result = %d, language = %s", result, *language);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt get default language : result = %d", result);
                }
@@ -960,20 +900,14 @@ int stt_dbus_request_is_recognition_type_supported(int uid, const char* type, bo
                   STT_SERVER_SERVICE_INTERFACE, 
                   STT_METHOD_IS_TYPE_SUPPORTED);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt is partial result supported : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt is partial result supported : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt is recognition type supported : uid(%d) type(%s)", uid, type);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt is recognition type supported : uid(%d) type(%s)", uid, type);
        }
 
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_STRING, &type,
                DBUS_TYPE_INVALID);
@@ -985,7 +919,7 @@ int stt_dbus_request_is_recognition_type_supported(int uid, const char* type, bo
        int result = STT_ERROR_OPERATION_FAILED;
        int result_support = -1;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -998,16 +932,16 @@ int stt_dbus_request_is_recognition_type_supported(int uid, const char* type, bo
                        DBUS_TYPE_INT32, &result_support,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
                        *support = (bool)result_support;
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt is recognition type supported : result = %d, support = %s", result, *support ? "true" : "false");
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt is recognition type supported : result = %d, support = %s", result, *support ? "true" : "false");
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt is recognition type supported : result = %d", result);
                }
@@ -1035,20 +969,14 @@ int stt_dbus_request_set_start_sound(int uid, const char* file)
                   STT_SERVER_SERVICE_INTERFACE, 
                   STT_METHOD_SET_START_SOUND);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set start sound : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set start sound : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set start sound : uid(%d) file(%s)", uid, file);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set start sound : uid(%d) file(%s)", uid, file);
        }
 
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_STRING, &file,
                DBUS_TYPE_INVALID);
@@ -1059,7 +987,7 @@ int stt_dbus_request_set_start_sound(int uid, const char* file)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1071,15 +999,15 @@ int stt_dbus_request_set_start_sound(int uid, const char* file)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set start sound : result = %d", result);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set start sound : result = %d", result);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt set start sound : result = %d", result);
                }
@@ -1102,20 +1030,14 @@ int stt_dbus_request_unset_start_sound(int uid)
                   STT_SERVER_SERVICE_INTERFACE, 
                   STT_METHOD_UNSET_START_SOUND);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt unset start sound : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt unset start sound : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt unset start sound : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt unset start sound : uid(%d)", uid);
        }
 
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_INVALID);
 
@@ -1125,7 +1047,7 @@ int stt_dbus_request_unset_start_sound(int uid)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1137,15 +1059,15 @@ int stt_dbus_request_unset_start_sound(int uid)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt unset start sound : result = %d", result);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt unset start sound : result = %d", result);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt unset start sound : result = %d", result);
                }
@@ -1173,20 +1095,14 @@ int stt_dbus_request_set_stop_sound(int uid, const char* file)
                   STT_SERVER_SERVICE_INTERFACE, 
                   STT_METHOD_SET_STOP_SOUND);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set stop sound : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt set stop sound : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set stop sound : uid(%d) file(%s)", uid, file);
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt set stop sound : uid(%d) file(%s)", uid, file);
        }
 
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
-       }
-
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_STRING, &file,
                DBUS_TYPE_INVALID);
@@ -1197,7 +1113,7 @@ int stt_dbus_request_set_stop_sound(int uid, const char* file)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1209,15 +1125,15 @@ int stt_dbus_request_set_stop_sound(int uid, const char* file)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set stop sound : result = %d", result);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt set stop sound : result = %d", result);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt set stop sound : result = %d", result);
                }
@@ -1240,20 +1156,14 @@ int stt_dbus_request_unset_stop_sound(int uid)
                   STT_SERVER_SERVICE_INTERFACE, 
                   STT_METHOD_UNSET_STOP_SOUND);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt unset stop sound : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt unset stop sound : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt unset stop sound : uid(%d)", uid);
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt unset stop sound : uid(%d)", uid);
        }
 
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
-       }
-
-       dbus_message_append_args( msg, 
+       dbus_message_append_args(msg,
                DBUS_TYPE_INT32, &uid,
                DBUS_TYPE_INVALID);
 
@@ -1263,7 +1173,7 @@ int stt_dbus_request_unset_stop_sound(int uid)
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1275,15 +1185,15 @@ int stt_dbus_request_unset_stop_sound(int uid)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
 
                if (0 == result) {
-                       SECURE_SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt unset stop sound : result = %d", result);
+                       SLOG(LOG_DEBUG, TAG_STTC, "<<<< stt unset stop sound : result = %d", result);
                } else {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< stt unset stop sound : result = %d", result);
                }
@@ -1312,34 +1222,47 @@ int stt_dbus_request_start(int uid, const char* lang, const char* type, int sile
                STT_SERVER_SERVICE_INTERFACE,   
                STT_METHOD_START);              
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt start : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt start : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt start : uid(%d), language(%s), type(%s)", uid, lang, type);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt start : uid(%d), language(%s), type(%s)", uid, lang, type);
        }
 
-       dbus_message_append_args( msg, 
-               DBUS_TYPE_INT32, &uid, 
-               DBUS_TYPE_STRING, &lang,   
+       dbus_message_append_args(msg,
+               DBUS_TYPE_INT32, &uid,
+               DBUS_TYPE_STRING, &lang,
                DBUS_TYPE_STRING, &type,
                DBUS_TYPE_INT32, &silence,
                DBUS_TYPE_STRING, &appid,
                DBUS_TYPE_INVALID);
-       
+#if 1
+       if(g_conn_sender) {
+               dbus_message_set_no_reply(msg, TRUE);
+
+               if (!dbus_connection_send(g_conn_sender, msg, NULL)) {
+                       SLOG(LOG_ERROR, TAG_STTC, "[Dbus ERROR] <<<< stt start message : Out Of Memory !");
+                       return STT_ERROR_OUT_OF_MEMORY;
+               } else {
+                       dbus_connection_flush(g_conn_sender);
+               }
+
+               dbus_message_unref(msg);
+
+       } else {
+               SLOG(LOG_WARN, TAG_STTC, "[WARN] dbus connection handle is null (%p)", g_conn_sender);
+               return STT_ERROR_OPERATION_FAILED;
+       }
+
+       return 0;
+#else
        DBusError err;
        dbus_error_init(&err);
 
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1351,9 +1274,9 @@ int stt_dbus_request_start(int uid, const char* lang, const char* type, int sile
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
@@ -1370,6 +1293,7 @@ int stt_dbus_request_start(int uid, const char* lang, const char* type, int sile
        }
 
        return result;
+#endif
 }
 
 int stt_dbus_request_stop(int uid)
@@ -1383,30 +1307,42 @@ int stt_dbus_request_stop(int uid)
                STT_SERVER_SERVICE_INTERFACE,   
                STT_METHOD_STOP);
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt stop : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt stop : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt stop : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt stop : uid(%d)", uid);
        }
 
        dbus_message_append_args(msg, 
                DBUS_TYPE_INT32, &uid, 
                DBUS_TYPE_INVALID);
+#if 1
+       if(g_conn_sender) {
+               dbus_message_set_no_reply(msg, TRUE);
+
+               if (!dbus_connection_send(g_conn_sender, msg, NULL)) {
+                       SLOG(LOG_ERROR, TAG_STTC, "[Dbus ERROR] <<<< stt stop message : Out Of Memory !");
+                       return STT_ERROR_OUT_OF_MEMORY;
+               } else {
+                       dbus_connection_flush(g_conn_sender);
+               }
 
+               dbus_message_unref(msg);
+       } else {
+               SLOG(LOG_WARN, TAG_STTC, "[WARN] dbus connection handle is null (%p)", g_conn_sender);
+               return STT_ERROR_OPERATION_FAILED;
+       }
+
+       return 0;
+#else
        DBusError err;
        dbus_error_init(&err);
 
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1418,9 +1354,9 @@ int stt_dbus_request_stop(int uid)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
@@ -1437,6 +1373,7 @@ int stt_dbus_request_stop(int uid)
        }
 
        return result;
+#endif
 }
 
 int stt_dbus_request_cancel(int uid)
@@ -1450,30 +1387,42 @@ int stt_dbus_request_cancel(int uid)
                STT_SERVER_SERVICE_INTERFACE,   /* interface name of the signal */
                STT_METHOD_CANCEL);     /* name of the signal */
 
-       if (NULL == msg) { 
-               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt cancel : Fail to make message"); 
+       if (NULL == msg) {
+               SLOG(LOG_ERROR, TAG_STTC, ">>>> stt cancel : Fail to make message");
                return STT_ERROR_OPERATION_FAILED;
        } else {
-               SECURE_SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt cancel : uid(%d)", uid);
-       }
-
-       if (NULL == g_conn) {
-               SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Connection is NOT valid");
-               dbus_message_unref(msg);
-               return STT_ERROR_INVALID_STATE;
+               SLOG(LOG_DEBUG, TAG_STTC, ">>>> stt cancel : uid(%d)", uid);
        }
 
        dbus_message_append_args(msg, 
                DBUS_TYPE_INT32, &uid, 
                DBUS_TYPE_INVALID);
+#if 1
+       if(g_conn_sender) {
+               dbus_message_set_no_reply(msg, TRUE);
+
+               if (!dbus_connection_send(g_conn_sender, msg, NULL)) {
+                       SLOG(LOG_ERROR, TAG_STTC, "[Dbus ERROR] <<<< stt stop message : Out Of Memory !");
+                       return STT_ERROR_OUT_OF_MEMORY;
+               } else {
+                       dbus_connection_flush(g_conn_sender);
+               }
 
+               dbus_message_unref(msg);
+       } else {
+               SLOG(LOG_WARN, TAG_STTC, "[WARN] dbus connection handle is null (%p)", g_conn_sender);
+               return STT_ERROR_OPERATION_FAILED;
+       }
+
+       return 0;
+#else
        DBusError err;
        dbus_error_init(&err);
 
        DBusMessage* result_msg;
        int result = STT_ERROR_OPERATION_FAILED;
 
-       result_msg = dbus_connection_send_with_reply_and_block(g_conn, msg, g_waiting_time, &err);
+       result_msg = dbus_connection_send_with_reply_and_block(g_conn_sender, msg, g_waiting_time, &err);
        dbus_message_unref(msg);
        if (dbus_error_is_set(&err)) {
                SLOG(LOG_ERROR, TAG_STTC, "[ERROR] Send Error (%s)", err.message);
@@ -1485,9 +1434,9 @@ int stt_dbus_request_cancel(int uid)
                        DBUS_TYPE_INT32, &result,
                        DBUS_TYPE_INVALID);
 
-               if (dbus_error_is_set(&err)) { 
+               if (dbus_error_is_set(&err)) {
                        SLOG(LOG_ERROR, TAG_STTC, "<<<< Get arguments error (%s)", err.message);
-                       dbus_error_free(&err); 
+                       dbus_error_free(&err);
                        result = STT_ERROR_OPERATION_FAILED;
                }
                dbus_message_unref(result_msg);
@@ -1504,4 +1453,5 @@ int stt_dbus_request_cancel(int uid)
        }
 
        return result;
+#endif
 }