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.impl;
018    
019    import org.apache.camel.Endpoint;
020    import org.apache.camel.Exchange;
021    import org.apache.camel.PollingConsumer;
022    import org.apache.camel.spi.ExceptionHandler;
023    
024    /**
025     * A useful base class for implementations of {@link PollingConsumer}
026     * 
027     * @version $Revision: 35332 $
028     */
029    public abstract class PollingConsumerSupport<E extends Exchange> extends ServiceSupport implements
030        PollingConsumer<E> {
031        private final Endpoint<E> endpoint;
032        private ExceptionHandler exceptionHandler;
033    
034        public PollingConsumerSupport(Endpoint<E> endpoint) {
035            this.endpoint = endpoint;
036        }
037    
038        @Override
039        public String toString() {
040            return "PullConsumer on " + endpoint;
041        }
042    
043        public Endpoint<E> getEndpoint() {
044            return endpoint;
045        }
046    
047        public ExceptionHandler getExceptionHandler() {
048            if (exceptionHandler == null) {
049                exceptionHandler = new LoggingExceptionHandler(getClass());
050            }
051            return exceptionHandler;
052        }
053    
054        public void setExceptionHandler(ExceptionHandler exceptionHandler) {
055            this.exceptionHandler = exceptionHandler;
056        }
057    
058        /**
059         * Handles the given exception using the {@link #getExceptionHandler()}
060         * 
061         * @param t the exception to handle
062         */
063        protected void handleException(Throwable t) {
064            getExceptionHandler().handleException(t);
065        }
066    }