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.Consumer; 020 import org.apache.camel.Endpoint; 021 import org.apache.camel.Processor; 022 import org.apache.camel.spi.ExceptionHandler; 023 import org.apache.camel.util.ServiceHelper; 024 025 /** 026 * A default consumer useful for implementation inheritance. 027 * 028 * @version $Revision: 772076 $ 029 */ 030 public class DefaultConsumer extends ServiceSupport implements Consumer { 031 private final Endpoint endpoint; 032 private final Processor processor; 033 private ExceptionHandler exceptionHandler; 034 035 public DefaultConsumer(Endpoint endpoint, Processor processor) { 036 this.endpoint = endpoint; 037 this.processor = processor; 038 } 039 040 @Override 041 public String toString() { 042 return "Consumer[" + endpoint.getEndpointUri() + "]"; 043 } 044 045 public Endpoint getEndpoint() { 046 return endpoint; 047 } 048 049 public Processor getProcessor() { 050 return processor; 051 } 052 053 public ExceptionHandler getExceptionHandler() { 054 if (exceptionHandler == null) { 055 exceptionHandler = new LoggingExceptionHandler(getClass()); 056 } 057 return exceptionHandler; 058 } 059 060 public void setExceptionHandler(ExceptionHandler exceptionHandler) { 061 this.exceptionHandler = exceptionHandler; 062 } 063 064 protected void doStop() throws Exception { 065 ServiceHelper.stopServices(processor); 066 } 067 068 protected void doStart() throws Exception { 069 ServiceHelper.startServices(processor); 070 } 071 072 /** 073 * Handles the given exception using the {@link #getExceptionHandler()} 074 * 075 * @param t the exception to handle 076 */ 077 protected void handleException(Throwable t) { 078 Throwable newt = (t == null) ? new IllegalArgumentException("Handling [null] exception") : t; 079 getExceptionHandler().handleException(newt); 080 } 081 }