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     * Provides a hook for custom {@link org.apache.camel.Processor} or {@link org.apache.camel.Component}
023     * instances to respond to completed or failed processing of an {@link Exchange} rather like Spring's
024     * <a href="http://static.springframework.org/spring/docs/2.5.x/api/org/springframework/transaction/
025     * support/TransactionSynchronization.html">TransactionSynchronization</a>
026     *
027     * @version 
028     */
029    public interface Synchronization {
030    
031        /**
032         * Called when the processing of the message exchange is complete
033         *
034         * @param exchange the exchange being processed
035         */
036        void onComplete(Exchange exchange);
037    
038        /**
039         * Called when the processing of the message exchange has failed for some reason.
040         * The exception which caused the problem is in {@link Exchange#getException()} and
041         * there could be a fault message via {@link org.apache.camel.Message#isFault()}
042         *
043         * @param exchange the exchange being processed
044         */
045        void onFailure(Exchange exchange);
046    }