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.Endpoint; 023 import org.apache.camel.Exchange; 024 import org.apache.camel.FailedToCreateProducerException; 025 import org.apache.camel.Processor; 026 import org.apache.camel.Producer; 027 import org.apache.camel.RuntimeCamelException; 028 import org.apache.camel.impl.ServiceSupport; 029 import org.apache.commons.logging.Log; 030 import org.apache.commons.logging.LogFactory; 031 032 /** 033 * @version $Revision: 563607 $ 034 */ 035 public class ProducerCache<E extends Exchange> extends ServiceSupport { 036 private static final Log LOG = LogFactory.getLog(ProducerCache.class); 037 038 private Map<String, Producer<E>> producers = new HashMap<String, Producer<E>>(); 039 040 public synchronized Producer<E> getProducer(Endpoint<E> endpoint) { 041 String key = endpoint.getEndpointUri(); 042 Producer<E> answer = producers.get(key); 043 if (answer == null) { 044 try { 045 answer = endpoint.createProducer(); 046 answer.start(); 047 } catch (Exception e) { 048 throw new FailedToCreateProducerException(endpoint, e); 049 } 050 producers.put(key, answer); 051 } 052 return answer; 053 } 054 055 /** 056 * Sends the exchange to the given endpoint 057 * 058 * @param endpoint the endpoint to send the exchange to 059 * @param exchange the exchange to send 060 */ 061 public void send(Endpoint<E> endpoint, E exchange) { 062 try { 063 Producer<E> producer = getProducer(endpoint); 064 producer.process(exchange); 065 } catch (Exception e) { 066 throw new RuntimeCamelException(e); 067 } 068 } 069 070 /** 071 * Sends an exchange to an endpoint using a supplied 072 * 073 * @{link Processor} to populate the exchange 074 * 075 * @param endpoint the endpoint to send the exchange to 076 * @param processor the transformer used to populate the new exchange 077 */ 078 public E send(Endpoint<E> endpoint, Processor processor) { 079 try { 080 Producer<E> producer = getProducer(endpoint); 081 E exchange = producer.createExchange(); 082 083 // lets populate using the processor callback 084 processor.process(exchange); 085 086 // now lets dispatch 087 if (LOG.isDebugEnabled()) { 088 LOG.debug(">>>> " + endpoint + " " + exchange); 089 } 090 producer.process(exchange); 091 return exchange; 092 } catch (Exception e) { 093 throw new RuntimeCamelException(e); 094 } 095 } 096 097 protected void doStop() throws Exception { 098 ServiceHelper.stopServices(producers.values()); 099 } 100 101 protected void doStart() throws Exception { 102 } 103 }