/**
*
* 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.Consumer;
import org.apache.camel.Processor;
import org.apache.camel.component.pojo.PojoExchange;
import org.apache.camel.component.pojo.PojoInvocation;
import org.apache.camel.impl.DefaultConsumer;
/**
* A {@link Consumer} which uses RMI's {@see UnicastRemoteObject} to consume method invocations.
*
* @version $Revision: 533758 $
*/
public class RmiConsumer extends DefaultConsumer<PojoExchange> 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 e1) {
}
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());
}
PojoInvocation invocation = new PojoInvocation(proxy, method, args);
PojoExchange exchange = getEndpoint().createExchange();
exchange.setInvocation(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;
}
}