add error handling (#394)

Author: oblomov-dev

src/z2ui5_cl_demo_app_135.clas.abap

@@ -130,23 +130,27 @@ CLASS z2ui5_cl_demo_app_135 IMPLEMENTATION.
 
 
   METHOD z2ui5_if_app~main.
+    TRY.
 
-    CLEAR error.
+        CLEAR error.
 
-    IF check_initialized = abap_false.
-      check_initialized = abap_true.
-      update_lock_counter( ).
-      initialize_view( client ).
-    ENDIF.
+        IF check_initialized = abap_false.
+          check_initialized = abap_true.
+          update_lock_counter( ).
+          initialize_view( client ).
+        ENDIF.
 
-    TRY.
-        on_event( client ).
-      CATCH z2ui5_cx_util_error INTO DATA(x_error).
-        error-text = x_error->get_text( ).
-        error-flag = abap_true.
-        client->view_model_update( ).
-    ENDTRY.
+        TRY.
+            on_event( client ).
+          CATCH z2ui5_cx_util_error INTO DATA(x_error).
+            error-text = x_error->get_text( ).
+            error-flag = abap_true.
+            client->view_model_update( ).
+        ENDTRY.
 
+      CATCH cx_root INTO DATA(lx).
+        client->message_box_display( lx->get_text( ) ).
+    ENDTRY.
   ENDMETHOD.
 
 

src/z2ui5_cl_demo_app_137.clas.abap

@@ -30,12 +30,18 @@ ENDCLASS.
 CLASS z2ui5_cl_demo_app_137 IMPLEMENTATION.
 
   METHOD z2ui5_if_app~main.
-    IF check_initialized = abap_false.
-      check_initialized = abap_true.
-      initialize_view( client ).
-    ENDIF.
+    TRY.
+
+        IF check_initialized = abap_false.
+          check_initialized = abap_true.
+          initialize_view( client ).
+        ENDIF.
+
+        on_event( client ).
 
-    on_event( client ).
+      CATCH cx_root INTO DATA(lx).
+        client->message_box_display( lx->get_text( ) ).
+    ENDTRY.
   ENDMETHOD.
 
   METHOD initialize_view.