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.AsyncCallback; 020 import org.apache.camel.AsyncProcessor; 021 import org.apache.camel.Endpoint; 022 import org.apache.camel.Exchange; 023 import org.apache.camel.ExchangePattern; 024 import org.apache.camel.Producer; 025 import org.apache.camel.Service; 026 import org.apache.camel.impl.ServiceSupport; 027 import org.apache.camel.impl.converter.AsyncProcessorTypeConverter; 028 import org.apache.camel.util.ObjectHelper; 029 import org.apache.commons.logging.Log; 030 import org.apache.commons.logging.LogFactory; 031 032 /** 033 * Processor for forwarding exchanges to an endpoint destination. 034 * 035 * @version $Revision: 751648 $ 036 */ 037 public class SendProcessor extends ServiceSupport implements AsyncProcessor, Service { 038 protected static final transient Log LOG = LogFactory.getLog(SendProcessor.class); 039 protected Endpoint destination; 040 protected Producer producer; 041 protected AsyncProcessor processor; 042 protected ExchangePattern pattern; 043 044 public SendProcessor(Endpoint destination) { 045 ObjectHelper.notNull(destination, "destination"); 046 this.destination = destination; 047 } 048 049 public SendProcessor(Endpoint destination, ExchangePattern pattern) { 050 this(destination); 051 this.pattern = pattern; 052 } 053 054 @Override 055 public String toString() { 056 return "sendTo(" + destination + (pattern != null ? " " + pattern : "") + ")"; 057 } 058 059 public void process(Exchange exchange) throws Exception { 060 if (producer == null) { 061 if (isStopped()) { 062 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange); 063 } else { 064 throw new IllegalStateException("No producer, this processor has not been started!"); 065 } 066 } else { 067 exchange = configureExchange(exchange); 068 producer.process(exchange); 069 } 070 } 071 072 public boolean process(Exchange exchange, AsyncCallback callback) { 073 if (producer == null) { 074 if (isStopped()) { 075 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange); 076 } else { 077 exchange.setException(new IllegalStateException("No producer, this processor has not been started!")); 078 } 079 callback.done(true); 080 return true; 081 } else { 082 exchange = configureExchange(exchange); 083 return processor.process(exchange, callback); 084 } 085 } 086 087 public Endpoint getDestination() { 088 return destination; 089 } 090 091 protected void doStart() throws Exception { 092 this.producer = destination.createProducer(); 093 this.producer.start(); 094 this.processor = AsyncProcessorTypeConverter.convert(producer); 095 } 096 097 protected void doStop() throws Exception { 098 if (producer != null) { 099 try { 100 producer.stop(); 101 } finally { 102 producer = null; 103 processor = null; 104 } 105 } 106 } 107 108 protected Exchange configureExchange(Exchange exchange) { 109 if (pattern != null) { 110 exchange.setPattern(pattern); 111 } 112 return exchange; 113 } 114 115 }