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.pojo; 018 019 import java.lang.reflect.InvocationHandler; 020 import java.lang.reflect.InvocationTargetException; 021 import java.lang.reflect.Method; 022 import java.lang.reflect.Proxy; 023 import java.util.HashMap; 024 import java.util.Map; 025 026 import org.apache.camel.Endpoint; 027 import org.apache.camel.Producer; 028 import org.apache.camel.spi.Provider; 029 import org.apache.camel.impl.DefaultComponent; 030 031 /** 032 * Represents the component that manages {@link PojoEndpoint}. It holds the 033 * list of named pojos that queue endpoints reference. 034 * 035 * @version $Revision: 519973 $ 036 */ 037 public class PojoComponent extends DefaultComponent<PojoExchange> { 038 protected final HashMap<String, Object> services = new HashMap<String, Object>(); 039 040 public void addService(String uri, Object pojo) { 041 services.put(uri, pojo); 042 } 043 044 public void removeService(String uri) { 045 services.remove(uri); 046 } 047 048 public Object getService(String uri) { 049 return services.get(uri); 050 } 051 052 @Override 053 protected Endpoint<PojoExchange> createEndpoint(String uri, final String remaining, Map parameters) throws Exception { 054 Object pojo = getService(remaining); 055 return new PojoEndpoint(uri, this, pojo); 056 } 057 058 /** 059 * Creates a Proxy which sends PojoExchange to the endpoint. 060 * @throws Exception 061 */ 062 static public Object createProxy(final Endpoint endpoint, ClassLoader cl, Class interfaces[]) throws Exception { 063 final Producer producer = endpoint.createProducer(); 064 return Proxy.newProxyInstance(cl, interfaces, new InvocationHandler() { 065 public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { 066 PojoInvocation invocation = new PojoInvocation(proxy, method, args); 067 PojoExchange exchange = new PojoExchange(endpoint.getContext()); 068 exchange.setInvocation(invocation); 069 producer.process(exchange); 070 Throwable fault = exchange.getException(); 071 if (fault != null) { 072 throw new InvocationTargetException(fault); 073 } 074 return exchange.getOut().getBody(); 075 } 076 }); 077 } 078 079 /** 080 * Creates a Proxy which sends PojoExchange to the endpoint. 081 * @throws Exception 082 */ 083 static public Object createProxy(Endpoint endpoint, Class interfaces[]) throws Exception { 084 if( interfaces.length < 1 ) { 085 throw new IllegalArgumentException("You must provide at least 1 interface class."); 086 } 087 return createProxy(endpoint, interfaces[0].getClassLoader(), interfaces); 088 } 089 /** 090 * Creates a Proxy which sends PojoExchange to the endpoint. 091 * @throws Exception 092 */ 093 @SuppressWarnings("unchecked") 094 static public <T> T createProxy(Endpoint endpoint, ClassLoader cl, Class<T> interfaceClass) throws Exception { 095 return (T) createProxy(endpoint, cl, new Class[]{interfaceClass}); 096 } 097 098 /** 099 * Creates a Proxy which sends PojoExchange to the endpoint. 100 * @throws Exception 101 */ 102 @SuppressWarnings("unchecked") 103 static public <T> T createProxy(Endpoint endpoint, Class<T> interfaceClass) throws Exception { 104 return (T) createProxy(endpoint, new Class[]{interfaceClass}); 105 } 106 107 108 109 }