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 */
017package org.apache.camel.processor;
018
019import java.util.concurrent.ScheduledExecutorService;
020
021import org.apache.camel.CamelContext;
022import org.apache.camel.Exchange;
023import org.apache.camel.Predicate;
024import org.apache.camel.Processor;
025import org.apache.camel.processor.exceptionpolicy.ExceptionPolicyStrategy;
026import org.apache.camel.util.CamelLogger;
027
028/**
029 * Default error handler
030 *
031 * @version
032 */
033public class DefaultErrorHandler extends RedeliveryErrorHandler {
034
035    /**
036     * Creates the default error handler.
037     *
038     * @param camelContext                 the camel context
039     * @param output                       outer processor that should use this default error handler
040     * @param logger                       logger to use for logging failures and redelivery attempts
041     * @param redeliveryProcessor           an optional processor to run before redelivery attempt
042     * @param redeliveryPolicy              policy for redelivery
043     * @param exceptionPolicyStrategy       strategy for onException handling
044     * @param retryWhile                    retry while
045     * @param executorService               the {@link java.util.concurrent.ScheduledExecutorService} to be used for redelivery thread pool. Can be <tt>null</tt>.
046     * @param onPrepareProcessor            a custom {@link org.apache.camel.Processor} to prepare the {@link org.apache.camel.Exchange} before
047     *                                      handled by the failure processor / dead letter channel.
048     * @param onExceptionOccurredProcessor  a custom {@link org.apache.camel.Processor} to process the {@link org.apache.camel.Exchange} just after an exception was thrown.
049     */
050    public DefaultErrorHandler(CamelContext camelContext, Processor output, CamelLogger logger, Processor redeliveryProcessor,
051                               RedeliveryPolicy redeliveryPolicy, ExceptionPolicyStrategy exceptionPolicyStrategy, Predicate retryWhile,
052                               ScheduledExecutorService executorService, Processor onPrepareProcessor, Processor onExceptionOccurredProcessor) {
053
054        super(camelContext, output, logger, redeliveryProcessor, redeliveryPolicy, null, null, true, false, retryWhile, executorService, onPrepareProcessor, onExceptionOccurredProcessor);
055        setExceptionPolicy(exceptionPolicyStrategy);
056    }
057
058    public void process(Exchange exchange) throws Exception {
059        // just to let the stacktrace reveal that this is a dead letter channel
060        super.process(exchange);
061    }
062
063    @Override
064    public String toString() {
065        if (output == null) {
066            // if no output then dont do any description
067            return "";
068        }
069        return "DefaultErrorHandler[" + output + "]";
070    }
071
072}