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 java.util.HashMap; 020 import java.util.Map; 021 022 import org.apache.camel.AsyncCallback; 023 import org.apache.camel.Endpoint; 024 import org.apache.camel.Exchange; 025 import org.apache.camel.ExchangePattern; 026 import org.apache.camel.FailedToCreateProducerException; 027 import org.apache.camel.Processor; 028 import org.apache.camel.Producer; 029 import org.apache.camel.RuntimeCamelException; 030 import org.apache.camel.impl.converter.AsyncProcessorTypeConverter; 031 import org.apache.camel.util.ServiceHelper; 032 import org.apache.commons.logging.Log; 033 import org.apache.commons.logging.LogFactory; 034 035 /** 036 * Cache containing created {@link Producer}. 037 * 038 * @version $Revision: 41910 $ 039 */ 040 public class ProducerCache<E extends Exchange> extends ServiceSupport { 041 private static final transient Log LOG = LogFactory.getLog(ProducerCache.class); 042 043 private Map<String, Producer<E>> producers = new HashMap<String, Producer<E>>(); 044 045 public synchronized Producer<E> getProducer(Endpoint<E> endpoint) { 046 String key = endpoint.getEndpointUri(); 047 Producer<E> answer = producers.get(key); 048 if (answer == null) { 049 try { 050 answer = endpoint.createProducer(); 051 answer.start(); 052 } catch (Exception e) { 053 throw new FailedToCreateProducerException(endpoint, e); 054 } 055 producers.put(key, answer); 056 } 057 return answer; 058 } 059 060 /** 061 * Sends the exchange to the given endpoint 062 * 063 * @param endpoint the endpoint to send the exchange to 064 * @param exchange the exchange to send 065 */ 066 public void send(Endpoint<E> endpoint, E exchange) { 067 try { 068 Producer<E> producer = getProducer(endpoint); 069 producer.process(exchange); 070 } catch (Exception e) { 071 throw new RuntimeCamelException(e); 072 } 073 } 074 075 /** 076 * Sends an exchange to an endpoint using a supplied 077 * {@link Processor} to populate the exchange 078 * 079 * @param endpoint the endpoint to send the exchange to 080 * @param processor the transformer used to populate the new exchange 081 */ 082 public E send(Endpoint<E> endpoint, Processor processor) { 083 try { 084 Producer<E> producer = getProducer(endpoint); 085 E exchange = producer.createExchange(); 086 return sendExchange(endpoint, producer, processor, exchange); 087 } catch (Exception e) { 088 throw new RuntimeCamelException(e); 089 } 090 } 091 092 /** 093 * Sends an exchange to an endpoint using a supplied 094 * {@link Processor} to populate the exchange. The callback 095 * will be called when the exchange is completed. 096 * 097 * @param endpoint the endpoint to send the exchange to 098 * @param processor the transformer used to populate the new exchange 099 */ 100 public E send(Endpoint<E> endpoint, Processor processor, AsyncCallback callback) { 101 try { 102 Producer<E> producer = getProducer(endpoint); 103 E exchange = producer.createExchange(); 104 boolean sync = sendExchange(endpoint, producer, processor, exchange, callback); 105 setProcessedSync(exchange, sync); 106 return exchange; 107 } catch (Exception e) { 108 throw new RuntimeCamelException(e); 109 } 110 } 111 112 public static boolean isProcessedSync(Exchange exchange) { 113 Boolean rc = exchange.getProperty(ProducerCache.class.getName() + ".SYNC", Boolean.class); 114 return rc == null ? false : rc; 115 } 116 117 public static void setProcessedSync(Exchange exchange, boolean b) { 118 exchange.setProperty(ProducerCache.class.getName() + ".SYNC", b ? Boolean.TRUE : Boolean.FALSE); 119 } 120 121 /** 122 * Sends an exchange to an endpoint using a supplied 123 * {@link Processor} to populate the exchange 124 * 125 * @param endpoint the endpoint to send the exchange to 126 * @param pattern the message {@link ExchangePattern} such as 127 * {@link ExchangePattern#InOnly} or {@link ExchangePattern#InOut} 128 * @param processor the transformer used to populate the new exchange 129 */ 130 public E send(Endpoint<E> endpoint, ExchangePattern pattern, Processor processor) { 131 try { 132 Producer<E> producer = getProducer(endpoint); 133 E exchange = producer.createExchange(pattern); 134 return sendExchange(endpoint, producer, processor, exchange); 135 } catch (Exception e) { 136 throw new RuntimeCamelException(e); 137 } 138 } 139 140 141 protected E sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange) throws Exception { 142 // lets populate using the processor callback 143 processor.process(exchange); 144 145 // now lets dispatch 146 if (LOG.isDebugEnabled()) { 147 LOG.debug(">>>> " + endpoint + " " + exchange); 148 } 149 producer.process(exchange); 150 return exchange; 151 } 152 153 protected boolean sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange, AsyncCallback callback) throws Exception { 154 // lets populate using the processor callback 155 processor.process(exchange); 156 157 // now lets dispatch 158 if (LOG.isDebugEnabled()) { 159 LOG.debug(">>>> " + endpoint + " " + exchange); 160 } 161 return AsyncProcessorTypeConverter.convert(producer).process(exchange, callback); 162 } 163 164 protected void doStop() throws Exception { 165 ServiceHelper.stopServices(producers.values()); 166 producers.clear(); 167 } 168 169 protected void doStart() throws Exception { 170 } 171 }