001    // Copyright 2006, 2007, 2008, 2009 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    
015    package org.apache.tapestry5.services;
016    
017    import java.io.IOException;
018    
019    /**
020     * Filter interface for {@link org.apache.tapestry5.services.RequestHandler}. Implementations of this interface may be
021     * contributed into the RequestHandler service configuration.
022     */
023    public interface RequestFilter
024    {
025        /**
026         * Returns true if the request has been handled, false otherwise.
027         */
028        boolean service(Request request, Response response, RequestHandler handler) throws IOException;
029    
030    }