001// Copyright 2030 The Apache Software Foundation
002//
003// Licensed under the Apache License, Version 2.0 (the "License");
004// you may not use this file except in compliance with the License.
005// You may obtain a copy of the License at
006//
007// http://www.apache.org/licenses/LICENSE-2.0
008//
009// Unless required by applicable law or agreed to in writing, software
010// distributed under the License is distributed on an "AS IS" BASIS,
011// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
012// See the License for the specific language governing permissions and
013// limitations under the License.
014
015package org.apache.tapestry5.internal.services;
016
017import org.apache.tapestry5.ComponentResources;
018import org.apache.tapestry5.EventContext;
019
020import java.io.IOException;
021
022/**
023 * Responsible for handling the response for a page called with an unknown activation context when the check itself is
024 * enabled.
025 * The default implementation is to respond with a 404 NOT FOUND.
026 *
027 * @see http://issues.apache.org/jira/browse/TAP5-2070
028 * @see org.apache.tapestry5.annotations.UnknownActivationContextCheck
029 * @see org.apache.tapestry5.services.HttpError
030 *
031 * @since 5.4
032 */
033public interface UnknownActivationContextHandler
034{
035    /**
036     * Answer the client in the case of a request coming in with an unknown activation context.
037     */
038    @SuppressWarnings("unchecked")
039    void handleUnknownContext(ComponentResources pageResources, EventContext activationContext)
040                            throws IOException;
041}