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.processor;
018    
019    import org.apache.camel.Exchange;
020    import org.apache.camel.Predicate;
021    import org.apache.camel.Processor;
022    import org.apache.camel.processor.exceptionpolicy.ExceptionPolicyStrategy;
023    
024    /**
025     * Default error handler
026     *
027     * @version $Revision: 784803 $
028     */
029    public class DefaultErrorHandler extends RedeliveryErrorHandler {
030    
031        /**
032         * Creates the default error handler.
033         *
034         * @param output                    outer processor that should use this default error handler
035         * @param logger                    logger to use for logging failures and redelivery attempts
036         * @param redeliveryProcessor       an optional processor to run before redelivery attempt
037         * @param redeliveryPolicy          policy for redelivery
038         * @param handledPolicy             policy for handling failed exception that are moved to the dead letter queue
039         * @param exceptionPolicyStrategy   strategy for onException handling
040         */
041        public DefaultErrorHandler(Processor output, Logger logger, Processor redeliveryProcessor, RedeliveryPolicy redeliveryPolicy,
042                                   Predicate handledPolicy, ExceptionPolicyStrategy exceptionPolicyStrategy) {
043            super(output, logger, redeliveryProcessor, redeliveryPolicy, handledPolicy, null, null, false);
044            setExceptionPolicy(exceptionPolicyStrategy);
045        }
046    
047        public void process(Exchange exchange) throws Exception {
048            // just to let the stacktrace reveal that this is a dead letter channel
049            super.process(exchange);
050        }
051    
052        @Override
053        public String toString() {
054            if (output == null) {
055                // if no output then dont do any description
056                return "";
057            }
058            return "DefaultErrorHandler[" + output + "]";
059        }
060    
061    }