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.commons.logging.Log; 029 import org.apache.commons.logging.LogFactory; 030 031 /** 032 * Processor for forwarding exchanges to an endpoint destination. 033 * 034 * @version $Revision: 1995 $ 035 */ 036 public class SendProcessor extends ServiceSupport implements AsyncProcessor, Service { 037 private static final transient Log LOG = LogFactory.getLog(SendProcessor.class); 038 private Endpoint destination; 039 private Producer producer; 040 private AsyncProcessor processor; 041 private ExchangePattern pattern; 042 043 public SendProcessor(Endpoint destination) { 044 if (destination == null) { 045 throw new IllegalArgumentException("Endpoint cannot be null!"); 046 } 047 this.destination = destination; 048 } 049 050 public SendProcessor(Endpoint destination, ExchangePattern pattern) { 051 this(destination); 052 this.pattern = pattern; 053 } 054 055 @Override 056 public String toString() { 057 return "sendTo(" + destination + (pattern != null ? " " + pattern : "") + ")"; 058 } 059 060 public void process(Exchange exchange) throws Exception { 061 if (producer == null) { 062 if (isStopped()) { 063 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange); 064 } else { 065 throw new IllegalStateException("No producer, this processor has not been started!"); 066 } 067 } else { 068 configureExchange(exchange); 069 producer.process(exchange); 070 } 071 } 072 073 public boolean process(Exchange exchange, AsyncCallback callback) { 074 if (producer == null) { 075 if (isStopped()) { 076 LOG.warn("Ignoring exchange sent after processor is stopped: " + exchange); 077 } else { 078 exchange.setException(new IllegalStateException("No producer, this processor has not been started!")); 079 } 080 callback.done(true); 081 return true; 082 } else { 083 configureExchange(exchange); 084 return processor.process(exchange, callback); 085 } 086 } 087 088 public Endpoint getDestination() { 089 return destination; 090 } 091 092 protected void doStart() throws Exception { 093 this.producer = destination.createProducer(); 094 this.producer.start(); 095 this.processor = AsyncProcessorTypeConverter.convert(producer); 096 } 097 098 protected void doStop() throws Exception { 099 if (producer != null) { 100 try { 101 producer.stop(); 102 } finally { 103 producer = null; 104 processor = null; 105 } 106 } 107 } 108 109 protected void configureExchange(Exchange exchange) { 110 if (pattern != null) { 111 exchange.setPattern(pattern); 112 } 113 } 114 }