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.io.Externalizable; 020 import java.io.IOException; 021 import java.io.ObjectInput; 022 import java.io.ObjectOutput; 023 import java.lang.reflect.InvocationTargetException; 024 import java.lang.reflect.Method; 025 import java.util.Arrays; 026 027 import org.apache.camel.Exchange; 028 import org.apache.camel.util.IOHelper; 029 import org.apache.camel.util.ObjectHelper; 030 031 /** 032 * Invocation of beans that can handle being serialized. 033 */ 034 public class BeanInvocation implements Externalizable { 035 private Object[] args; 036 private MethodBean methodBean; 037 private transient Method method; 038 039 public BeanInvocation() { 040 } 041 042 public BeanInvocation(Method method, Object[] args) { 043 this.method = method; 044 this.args = args; 045 } 046 047 @Override 048 public String toString() { 049 Object list = null; 050 if (args != null) { 051 list = Arrays.asList(args); 052 } 053 return "BeanInvocation " + method + " with " + list + "]"; 054 } 055 056 public Object[] getArgs() { 057 return args; 058 } 059 060 public Method getMethod() { 061 return method; 062 } 063 064 public void setMethod(Method method) { 065 this.method = method; 066 } 067 068 public void setArgs(Object[] args) { 069 this.args = args; 070 } 071 072 /** 073 * This causes us to invoke the endpoint Pojo using reflection. 074 * 075 * @param pojo the bean on which to perform this invocation 076 * @param exchange the exchange carrying the method invocation 077 */ 078 public void invoke(Object pojo, Exchange exchange) { 079 try { 080 Object response = getMethod().invoke(pojo, getArgs()); 081 exchange.getOut().setBody(response); 082 } catch (InvocationTargetException e) { 083 exchange.setException(e.getCause()); 084 } catch (RuntimeException e) { 085 throw e; 086 } catch (Throwable e) { 087 throw new RuntimeException(e); 088 } 089 } 090 091 public void readExternal(ObjectInput objectInput) throws IOException, ClassNotFoundException { 092 methodBean = ObjectHelper.cast(MethodBean.class, objectInput.readObject()); 093 try { 094 method = methodBean.getMethod(); 095 } catch (NoSuchMethodException e) { 096 throw IOHelper.createIOException(e); 097 } 098 args = ObjectHelper.cast(Object[].class, objectInput.readObject()); 099 } 100 101 public void writeExternal(ObjectOutput objectOutput) throws IOException { 102 if (methodBean == null) { 103 methodBean = new MethodBean(method); 104 } 105 objectOutput.writeObject(methodBean); 106 objectOutput.writeObject(args); 107 } 108 }