[[usage-by-causeway-viewers]]
= Usage by Apache Causeway' Viewers

:Notice: Licensed to the Apache Software Foundation (ASF) under one or more contributor license agreements. See the NOTICE file distributed with this work for additional information regarding copyright ownership. The ASF licenses this file to you 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. http://www.apache.org/licenses/LICENSE-2.0 . Unless required by applicable law or agreed to in writing, software distributed under the License is distributed on an "AS IS" BASIS, WITHOUT WARRANTIES OR  CONDITIONS OF ANY KIND, either express or implied. See the License for the specific language governing permissions and limitations under the License.


By and large the security mechanisms within Causeway are transparent to the rest of the framework.
That said, it is the responsibility of the viewers to ensure that for each request there is a valid user session present.
The sections below explain how this works.

NOTE: the content below also appears in the respective user guides for the xref:vw:ROOT:about.adoc[Web UI (Wicket viewer)] and the xref:vro:ROOT:about.adoc[REST API (Restful Objects viewer)].

== Wicket Viewer

include::vw:ROOT:partial$security/pages.adoc[]

[[vw-user-registration]]
=== User-registration

include::vw:ROOT:partial$security/user-registration.adoc[]

== Restful Objects Viewer

include::vro:ROOT:partial$security/webmodule.adoc[]

