| /** |
| * Licensed to the Apache Software Foundation (ASF) under one or more |
| * contributor license agreements. See the NOTICE file distributed with |
| * this work for additional information regarding copyright ownership. |
| * The ASF licenses this file to You under the Apache License, Version 2.0 |
| * (the "License"); you may not use this file except in compliance with |
| * the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package org.apache.camel.component.rmi; |
| |
| import java.lang.reflect.InvocationHandler; |
| import java.lang.reflect.InvocationTargetException; |
| import java.lang.reflect.Method; |
| import java.lang.reflect.Proxy; |
| import java.rmi.Remote; |
| import java.rmi.registry.Registry; |
| import java.rmi.server.UnicastRemoteObject; |
| |
| import org.apache.camel.Exchange; |
| import org.apache.camel.Processor; |
| import org.apache.camel.component.bean.BeanInvocation; |
| import org.apache.camel.impl.DefaultConsumer; |
| |
| /** |
| * A {@link org.apache.camel.Consumer Consumer} which uses RMI's {@link UnicastRemoteObject} to consume |
| * method invocations. |
| * |
| * @version |
| */ |
| public class RmiConsumer extends DefaultConsumer implements InvocationHandler { |
| |
| private final RmiEndpoint endpoint; |
| private Remote stub; |
| private Remote proxy; |
| |
| public RmiConsumer(RmiEndpoint endpoint, Processor processor) { |
| super(endpoint, processor); |
| this.endpoint = endpoint; |
| } |
| |
| @Override |
| protected void doStart() throws Exception { |
| Class[] interfaces = new Class[endpoint.getRemoteInterfaces().size()]; |
| endpoint.getRemoteInterfaces().toArray(interfaces); |
| proxy = (Remote)Proxy.newProxyInstance(endpoint.getClassLoader(), interfaces, this); |
| stub = UnicastRemoteObject.exportObject(proxy, endpoint.getPort()); |
| |
| try { |
| Registry registry = endpoint.getRegistry(); |
| String name = endpoint.getName(); |
| registry.bind(name, stub); |
| |
| } catch (Exception e) { |
| // Registration might fail.. clean up.. |
| try { |
| UnicastRemoteObject.unexportObject(stub, true); |
| } catch (Throwable ignore) { |
| } |
| stub = null; |
| throw e; |
| } |
| super.doStart(); |
| } |
| |
| @Override |
| protected void doStop() throws Exception { |
| super.doStop(); |
| try { |
| Registry registry = endpoint.getRegistry(); |
| registry.unbind(endpoint.getName()); |
| } catch (Throwable e) { |
| // do our best to unregister |
| } |
| UnicastRemoteObject.unexportObject(proxy, true); |
| } |
| |
| public Object invoke(Object proxy, Method method, Object[] args) throws Throwable { |
| if (!isStarted()) { |
| throw new IllegalStateException("The endpoint is not active: " + getEndpoint().getEndpointUri()); |
| } |
| BeanInvocation invocation = new BeanInvocation(method, args); |
| Exchange exchange = getEndpoint().createExchange(); |
| exchange.getIn().setBody(invocation); |
| getProcessor().process(exchange); |
| Throwable fault = exchange.getException(); |
| if (fault != null) { |
| throw new InvocationTargetException(fault); |
| } |
| return exchange.getOut().getBody(); |
| } |
| |
| public Remote getProxy() { |
| return proxy; |
| } |
| |
| public Remote getStub() { |
| return stub; |
| } |
| } |