001    /**
002     *  Licensed to the Apache Software Foundation (ASF) under one or more
003     *  contributor license agreements.  See the NOTICE file distributed with
004     *  this work for additional information regarding copyright ownership.
005     *  The ASF licenses this file to You under the Apache License, Version 2.0
006     *  (the "License"); you may not use this file except in compliance with
007     *  the License.  You may obtain a copy of the License at
008     *
009     *     http://www.apache.org/licenses/LICENSE-2.0
010     *
011     *  Unless required by applicable law or agreed to in writing, software
012     *  distributed under the License is distributed on an "AS IS" BASIS,
013     *  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014     *  See the License for the specific language governing permissions and
015     *  limitations under the License.
016     */
017    
018    package org.apache.geronimo.interceptor;
019    
020    
021    /**
022     *
023     *
024     *
025     * @version $Rev: 706640 $ $Date: 2008-10-21 14:44:05 +0000 (Tue, 21 Oct 2008) $
026     */
027    public interface Interceptor {
028    
029        /**
030         * Interceptor does a little work for the invocation and then invokes the next interceptor
031         * in the chain.
032         *
033         * @param invocation the invocation for which work will be done
034         * @return the result of the invocation (includes return or application Exception)
035         * @throws java.lang.Throwable if a system exception occures while doing the work
036         */
037        InvocationResult invoke(Invocation invocation) throws Throwable;
038    }