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.component.bean; 018 019 import java.lang.reflect.InvocationHandler; 020 import java.lang.reflect.InvocationTargetException; 021 import java.lang.reflect.Method; 022 023 import org.apache.camel.Endpoint; 024 import org.apache.camel.ExchangePattern; 025 import org.apache.camel.Producer; 026 027 /** 028 * An {@link java.lang.reflect.InvocationHandler} which invokes a 029 * message exchange on a camel {@link Endpoint} 030 * 031 * @version $Revision: 1037 $ 032 */ 033 public class CamelInvocationHandler implements InvocationHandler { 034 private final Endpoint endpoint; 035 private final Producer producer; 036 private final MethodInfoCache methodInfoCache; 037 038 public CamelInvocationHandler(Endpoint endpoint, Producer producer, MethodInfoCache methodInfoCache) { 039 this.endpoint = endpoint; 040 this.producer = producer; 041 this.methodInfoCache = methodInfoCache; 042 } 043 044 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 045 BeanInvocation invocation = new BeanInvocation(method, args); 046 ExchangePattern pattern = ExchangePattern.InOut; 047 MethodInfo methodInfo = methodInfoCache.getMethodInfo(method); 048 if (methodInfo != null) { 049 pattern = methodInfo.getPattern(); 050 } 051 BeanExchange exchange = new BeanExchange(endpoint.getCamelContext(), pattern); 052 exchange.setInvocation(invocation); 053 054 producer.process(exchange); 055 Throwable fault = exchange.getException(); 056 if (fault != null) { 057 throw new InvocationTargetException(fault); 058 } 059 if (pattern.isOutCapable()) { 060 return exchange.getOut(true).getBody(); 061 } else { 062 return null; 063 } 064 } 065 } 066