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.impl.converter.AsyncProcessorTypeConverter; 030 import org.apache.camel.util.ServiceHelper; 031 import org.apache.commons.logging.Log; 032 import org.apache.commons.logging.LogFactory; 033 034 import static org.apache.camel.util.ObjectHelper.wrapRuntimeCamelException; 035 036 037 /** 038 * Cache containing created {@link Producer}. 039 * 040 * @version $Revision: 1242 $ 041 */ 042 public class ProducerCache<E extends Exchange> extends ServiceSupport { 043 private static final transient Log LOG = LogFactory.getLog(ProducerCache.class); 044 045 private Map<String, Producer<E>> producers = new HashMap<String, Producer<E>>(); 046 047 public synchronized Producer<E> getProducer(Endpoint<E> endpoint) { 048 String key = endpoint.getEndpointUri(); 049 Producer<E> answer = producers.get(key); 050 if (answer == null) { 051 try { 052 answer = endpoint.createProducer(); 053 answer.start(); 054 } catch (Exception e) { 055 throw new FailedToCreateProducerException(endpoint, e); 056 } 057 producers.put(key, answer); 058 } 059 return answer; 060 } 061 062 /** 063 * Sends the exchange to the given endpoint 064 * 065 * @param endpoint the endpoint to send the exchange to 066 * @param exchange the exchange to send 067 */ 068 public void send(Endpoint<E> endpoint, E exchange) { 069 try { 070 Producer<E> producer = getProducer(endpoint); 071 producer.process(exchange); 072 } catch (Exception e) { 073 throw wrapRuntimeCamelException(e); 074 } 075 } 076 077 /** 078 * Sends an exchange to an endpoint using a supplied 079 * {@link Processor} to populate the exchange 080 * 081 * @param endpoint the endpoint to send the exchange to 082 * @param processor the transformer used to populate the new exchange 083 */ 084 public E send(Endpoint<E> endpoint, Processor processor) { 085 try { 086 Producer<E> producer = getProducer(endpoint); 087 E exchange = producer.createExchange(); 088 return sendExchange(endpoint, producer, processor, exchange); 089 } catch (Exception e) { 090 throw wrapRuntimeCamelException(e); 091 } 092 } 093 094 /** 095 * Sends an exchange to an endpoint using a supplied 096 * {@link Processor} to populate the exchange. The callback 097 * will be called when the exchange is completed. 098 * 099 * @param endpoint the endpoint to send the exchange to 100 * @param processor the transformer used to populate the new exchange 101 */ 102 public E send(Endpoint<E> endpoint, Processor processor, AsyncCallback callback) { 103 try { 104 Producer<E> producer = getProducer(endpoint); 105 E exchange = producer.createExchange(); 106 boolean sync = sendExchange(endpoint, producer, processor, exchange, callback); 107 setProcessedSync(exchange, sync); 108 return exchange; 109 } catch (Exception e) { 110 throw wrapRuntimeCamelException(e); 111 } 112 } 113 114 public static boolean isProcessedSync(Exchange exchange) { 115 Boolean rc = exchange.getProperty(ProducerCache.class.getName() + ".SYNC", Boolean.class); 116 return rc == null ? false : rc; 117 } 118 119 public static void setProcessedSync(Exchange exchange, boolean b) { 120 exchange.setProperty(ProducerCache.class.getName() + ".SYNC", b ? Boolean.TRUE : Boolean.FALSE); 121 } 122 123 /** 124 * Sends an exchange to an endpoint using a supplied 125 * {@link Processor} to populate the exchange 126 * 127 * @param endpoint the endpoint to send the exchange to 128 * @param pattern the message {@link ExchangePattern} such as 129 * {@link ExchangePattern#InOnly} or {@link ExchangePattern#InOut} 130 * @param processor the transformer used to populate the new exchange 131 */ 132 public E send(Endpoint<E> endpoint, ExchangePattern pattern, Processor processor) { 133 try { 134 Producer<E> producer = getProducer(endpoint); 135 E exchange = producer.createExchange(pattern); 136 return sendExchange(endpoint, producer, processor, exchange); 137 } catch (Exception e) { 138 throw wrapRuntimeCamelException(e); 139 } 140 } 141 142 143 protected E sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange) throws Exception { 144 // lets populate using the processor callback 145 processor.process(exchange); 146 147 // now lets dispatch 148 if (LOG.isDebugEnabled()) { 149 LOG.debug(">>>> " + endpoint + " " + exchange); 150 } 151 producer.process(exchange); 152 return exchange; 153 } 154 155 protected boolean sendExchange(Endpoint<E> endpoint, Producer<E> producer, Processor processor, E exchange, AsyncCallback callback) throws Exception { 156 // lets populate using the processor callback 157 processor.process(exchange); 158 159 // now lets dispatch 160 if (LOG.isDebugEnabled()) { 161 LOG.debug(">>>> " + endpoint + " " + exchange); 162 } 163 return AsyncProcessorTypeConverter.convert(producer).process(exchange, callback); 164 } 165 166 protected void doStop() throws Exception { 167 ServiceHelper.stopServices(producers.values()); 168 producers.clear(); 169 } 170 171 protected void doStart() throws Exception { 172 } 173 }