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/*
* 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.tuscany.sca.binding.rmi.provider;
import java.lang.reflect.Field;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.rmi.NoSuchObjectException;
import java.rmi.Remote;
import java.rmi.server.UnicastRemoteObject;
import java.security.AccessController;
import java.security.PrivilegedExceptionAction;
import net.sf.cglib.proxy.Enhancer;
import net.sf.cglib.proxy.MethodInterceptor;
import net.sf.cglib.proxy.MethodProxy;
import org.apache.tuscany.sca.binding.rmi.RMIBinding;
import org.apache.tuscany.sca.common.java.classloader.ClassLoaderDelegate;
import org.apache.tuscany.sca.host.rmi.RMIHost;
import org.apache.tuscany.sca.host.rmi.RMIHostException;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.apache.tuscany.sca.runtime.RuntimeEndpoint;
import org.oasisopen.sca.ServiceRuntimeException;
/**
* Implementation of a Service for the RMIBinding.
*
* @version $Rev$ $Date$
*/
public class RMIServiceBindingProvider implements ServiceBindingProvider {
private RuntimeComponent component;
private RuntimeComponentService service;
private RMIBinding binding;
private RMIHost rmiHost;
private RuntimeEndpoint endpoint;
private Remote rmiProxy;
public RMIServiceBindingProvider(RuntimeEndpoint endpoint, RMIHost rmiHost) {
this.endpoint = endpoint;
this.component = (RuntimeComponent)endpoint.getComponent();
this.service = (RuntimeComponentService)endpoint.getService();
this.binding = (RMIBinding)endpoint.getBinding();
this.rmiHost = rmiHost;
}
public void start() {
Interface serviceInterface = service.getInterfaceContract().getInterface();
rmiProxy = createRmiService(serviceInterface);
try {
String uri = rmiHost.registerService(binding.getURI(), rmiProxy);
// Update the binding with the physical URI
binding.setURI(uri);
endpoint.setDeployedURI(uri);
} catch (RMIHostException e) {
throw new ServiceRuntimeException(e);
}
}
public void stop() {
rmiHost.unregisterService(binding.getURI());
try {
UnicastRemoteObject.unexportObject(rmiProxy, false);
} catch (NoSuchObjectException e) {
throw new ServiceRuntimeException(e);
}
}
private int getPort(String port) {
int portNumber = RMIHost.RMI_DEFAULT_PORT;
if (port != null && port.length() > 0) {
portNumber = Integer.decode(port);
}
return portNumber;
}
private Remote createRmiService(final Interface serviceInterface) {
Enhancer enhancer = new Enhancer();
enhancer.setSuperclass(UnicastRemoteObject.class);
enhancer.setCallback(new MethodInterceptor() {
public Object intercept(Object arg0, Method method, Object[] args, MethodProxy arg3) throws Throwable {
try {
return invokeTarget(JavaInterfaceUtil.findOperation(method, serviceInterface.getOperations()), args);
} catch (InvocationTargetException e) {
final Throwable cause = e.getCause();
for (Class<?> declaredType : method.getExceptionTypes()) {
if (declaredType.isInstance(cause)) {
throw e;
}
}
if (cause.getCause() != null) {
// TUSCANY-2545: don't inlcude nested cause object
AccessController.doPrivileged(new PrivilegedExceptionAction<Object>() {
public Object run() throws Exception {
Field field = Throwable.class.getDeclaredField("cause");
field.setAccessible(true);
field.set(cause, null);
field.setAccessible(false);
return null;
}
});
}
throw cause;
}
}
});
Class<?> targetJavaInterface = getTargetJavaClass(serviceInterface);
targetJavaInterface = RemoteInterfaceGenerator.generate(targetJavaInterface);
/*
* In OSGi, the classloader for the interface cannot access the classes for the CGLIB
*/
enhancer.setClassLoader(new ClassLoaderDelegate(targetJavaInterface.getClassLoader(), getClass().getClassLoader()));
enhancer.setInterfaces(new Class[] {targetJavaInterface});
return (Remote)enhancer.create();
}
private Object invokeTarget(Operation op, Object[] args) throws InvocationTargetException {
return endpoint.invoke(op, args);
}
private Class<?> getTargetJavaClass(Interface targetInterface) {
// TODO: right now assume that the target is always a Java
// Implementation. Need to figure out
// how to generate Java Interface in cases where the target is not a
// Java Implementation
return ((JavaInterface)targetInterface).getJavaClass();
}
public InterfaceContract getBindingInterfaceContract() {
return service.getInterfaceContract();
}
public boolean supportsOneWayInvocation() {
return false;
}
}
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