001    /**
002     *
003     * Licensed to the Apache Software Foundation (ASF) under one or more
004     * contributor license agreements.  See the NOTICE file distributed with
005     * this work for additional information regarding copyright ownership.
006     * The ASF licenses this file to You under the Apache License, Version 2.0
007     * (the "License"); you may not use this file except in compliance with
008     * the License.  You may obtain a copy of the License at
009     *
010     * http://www.apache.org/licenses/LICENSE-2.0
011     *
012     * Unless required by applicable law or agreed to in writing, software
013     * distributed under the License is distributed on an "AS IS" BASIS,
014     * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
015     * See the License for the specific language governing permissions and
016     * limitations under the License.
017     */
018    package org.apache.camel.impl;
019    
020    import org.apache.camel.Endpoint;
021    import org.apache.camel.Exchange;
022    import org.apache.camel.PollingConsumer;
023    import org.apache.camel.spi.ExceptionHandler;
024    
025    /**
026     * A useful base class for implementations of {@link PollingConsumer}
027     *
028     * @version $Revision: 1.1 $
029     */
030    public abstract class PollingConsumerSupport<E extends Exchange> extends ServiceSupport implements 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    }