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.util; 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.ServiceSupport; 031 import org.apache.camel.impl.converter.AsyncProcessorTypeConverter; 032 import org.apache.commons.logging.Log; 033 import org.apache.commons.logging.LogFactory; 034 035 /** 036 * @version $Revision: 36635 $ 037 */ 038 public class ProducerCache<E extends Exchange> extends ServiceSupport { 039 private static final Log LOG = LogFactory.getLog(ProducerCache.class); 040 041 private Map<String, Producer<E>> producers = new HashMap<String, Producer<E>>(); 042 043 public synchronized Producer<E> getProducer(Endpoint<E> endpoint) { 044 String key = endpoint.getEndpointUri(); 045 Producer<E> answer = producers.get(key); 046 if (answer == null) { 047 try { 048 answer = endpoint.createProducer(); 049 answer.start(); 050 } catch (Exception e) { 051 throw new FailedToCreateProducerException(endpoint, e); 052 } 053 producers.put(key, answer); 054 } 055 return answer; 056 } 057 058 /** 059 * Sends the exchange to the given endpoint 060 * 061 * @param endpoint the endpoint to send the exchange to 062 * @param exchange the exchange to send 063 */ 064 public void send(Endpoint<E> endpoint, E exchange) { 065 try { 066 Producer<E> producer = getProducer(endpoint); 067 producer.process(exchange); 068 } catch (Exception e) { 069 throw new RuntimeCamelException(e); 070 } 071 } 072 073 /** 074 * Sends an exchange to an endpoint using a supplied 075 * {@link Processor} to populate the exchange 076 * 077 * @param endpoint the endpoint to send the exchange to 078 * @param processor the transformer used to populate the new exchange 079 */ 080 public E send(Endpoint<E> endpoint, Processor processor) { 081 try { 082 Producer<E> producer = getProducer(endpoint); 083 E exchange = producer.createExchange(); 084 return sendExchange(endpoint, producer, processor, exchange); 085 } catch (Exception e) { 086 throw new RuntimeCamelException(e); 087 } 088 } 089 090 /** 091 * Sends an exchange to an endpoint using a supplied 092 * {@link Processor} to populate the exchange. The callback 093 * will be called when the exchange is completed. 094 * 095 * @param endpoint the endpoint to send the exchange to 096 * @param processor the transformer used to populate the new exchange 097 */ 098 public E send(Endpoint<E> endpoint, Processor processor, AsyncCallback callback) { 099 try { 100 Producer<E> producer = getProducer(endpoint); 101 E exchange = producer.createExchange(); 102 boolean sync = sendExchange(endpoint, producer, processor, exchange, callback); 103 setProcessedSync(exchange, sync); 104 return exchange; 105 } catch (Exception e) { 106 throw new RuntimeCamelException(e); 107 } 108 } 109 110 public static boolean isProcessedSync(Exchange exchange) { 111 Boolean rc = exchange.getProperty(ProducerCache.class.getName() + ".SYNC", Boolean.class); 112 return rc == null ? false : rc; 113 } 114 115 public static void setProcessedSync(Exchange exchange, boolean b) { 116 exchange.setProperty(ProducerCache.class.getName() + ".SYNC", b ? Boolean.TRUE : Boolean.FALSE); 117 } 118 119 /** 120 * Sends an exchange to an endpoint using a supplied 121 * {@link Processor} to populate the exchange 122 * 123 * @param endpoint the endpoint to send the exchange to 124 * @param pattern the message {@link ExchangePattern} such as 125 * {@link ExchangePattern#InOnly} or {@link ExchangePattern#InOut} 126 * @param processor the transformer used to populate the new exchange 127 */ 128 public E send(Endpoint<E> endpoint, ExchangePattern pattern, Processor processor) { 129 try { 130 Producer<E> producer = getProducer(endpoint); 131 E exchange = producer.createExchange(pattern); 132 return sendExchange(endpoint, producer, processor, exchange); 133 } catch (Exception e) { 134 throw new RuntimeCamelException(e); 135 } 136 } 137 138 139 protected E sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange) throws Exception { 140 // lets populate using the processor callback 141 processor.process(exchange); 142 143 // now lets dispatch 144 if (LOG.isDebugEnabled()) { 145 LOG.debug(">>>> " + endpoint + " " + exchange); 146 } 147 producer.process(exchange); 148 return exchange; 149 } 150 151 protected boolean sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange, AsyncCallback callback) throws Exception { 152 // lets populate using the processor callback 153 processor.process(exchange); 154 155 // now lets dispatch 156 if (LOG.isDebugEnabled()) { 157 LOG.debug(">>>> " + endpoint + " " + exchange); 158 } 159 return AsyncProcessorTypeConverter.convert(producer).process(exchange, callback); 160 } 161 162 protected void doStop() throws Exception { 163 ServiceHelper.stopServices(producers.values()); 164 } 165 166 protected void doStart() throws Exception { 167 } 168 }