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    package org.apache.camel.spi;
018    
019    import org.apache.camel.Exchange;
020    
021    /**
022     * A Strategy pattern for handling exceptions; particularly in asynchronous processes such as consumers
023     * <p/>
024     * Its important to <b>not</b> throw any exceptions when handling exceptions as they handler
025     * is often invoked in a try .. catch logic already
026     *
027     * @version 
028     */
029    public interface ExceptionHandler {
030        
031        /**
032         * Handles the given exception
033         *
034         * @param exception the exception
035         */
036        void handleException(Throwable exception);
037    
038        /**
039         * Handles the given exception
040         *
041         * @param message additional message
042         * @param exception the exception
043         */
044        void handleException(String message, Throwable exception);
045    
046        /**
047         * Handles the given exception
048         *
049         * @param message additional message
050         * @param exchange exchange which cause the exception
051         * @param exception the exception
052         */
053        void handleException(String message, Exchange exchange, Throwable exception);
054    }