1 files changed, 172 insertions, 0 deletions
diff --git a/sandbox/sebastien/java/sca-node/modules/binding-rmi/src/main/java/org/apache/tuscany/sca/binding/rmi/RMIService.java b/sandbox/sebastien/java/sca-node/modules/binding-rmi/src/main/java/org/apache/tuscany/sca/binding/rmi/RMIService.java
new file mode 100644
index 0000000000..479ee7c8b2
--- /dev/null
+++ b/sandbox/sebastien/java/sca-node/modules/binding-rmi/src/main/java/org/apache/tuscany/sca/binding/rmi/RMIService.java
@@ -0,0 +1,172 @@
+/*
+ * 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;
+
+import java.lang.reflect.InvocationTargetException;
+import java.lang.reflect.Method;
+import java.rmi.Remote;
+import java.rmi.server.UnicastRemoteObject;
+
+import net.sf.cglib.asm.ClassWriter;
+import net.sf.cglib.asm.Constants;
+import net.sf.cglib.asm.Type;
+import net.sf.cglib.proxy.Enhancer;
+import net.sf.cglib.proxy.MethodInterceptor;
+import net.sf.cglib.proxy.MethodProxy;
+
+import org.apache.tuscany.sca.extension.helper.ComponentLifecycle;
+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.Operation;
+import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
+import org.apache.tuscany.sca.interfacedef.java.impl.JavaInterfaceUtil;
+import org.apache.tuscany.sca.runtime.RuntimeComponent;
+import org.apache.tuscany.sca.runtime.RuntimeComponentService;
+import org.apache.tuscany.sca.runtime.RuntimeWire;
+import org.osoa.sca.ServiceRuntimeException;
+
+/**
+ * Implementation of a Service for the RMIBinding.
+ *
+ * @version $Rev$ $Date$
+ */
+public class RMIService implements ComponentLifecycle {
+
+    private RuntimeComponent component;
+    private RuntimeComponentService service;
+    private RMIBinding binding;
+    private RMIHost rmiHost;
+    private RuntimeWire wire;
+
+    public RMIService(RuntimeComponent rc, RuntimeComponentService rcs, RMIBinding binding, RMIHost rmiHost) {
+        this.component = rc;
+        this.service = rcs;
+        this.binding = binding;
+        this.rmiHost = rmiHost;
+    }
+
+    public void start() {
+        // URI uri = URI.create(component.getURI() + "/" + binding.getName());
+        // binding.setURI(uri.toString());
+
+        wire = service.getRuntimeWire(binding);
+        Interface serviceInterface = service.getInterfaceContract().getInterface();
+
+        Remote rmiProxy = createRmiService(serviceInterface);
+
+        try {
+
+            rmiHost.registerService(binding.getServiceName(), getPort(binding.getPort()), rmiProxy);
+
+        } catch (RMIHostException e) {
+            throw new ServiceRuntimeException(e);
+        }
+    }
+
+    public void stop() {
+    }
+
+    protected int getPort(String port) {
+        int portNumber = RMIHost.RMI_DEFAULT_PORT;
+        if (port != null && port.length() > 0) {
+            portNumber = Integer.decode(port);
+        }
+        return portNumber;
+    }
+
+    protected 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 {
+                return invokeTarget(JavaInterfaceUtil.findOperation(method, serviceInterface.getOperations()), args);
+            }
+        });
+        Class targetJavaInterface = getTargetJavaClass(serviceInterface);
+        if (!Remote.class.isAssignableFrom(targetJavaInterface)) {
+            RMIServiceClassLoader classloader = new RMIServiceClassLoader(getClass().getClassLoader());
+            final byte[] byteCode = generateRemoteInterface(targetJavaInterface);
+            targetJavaInterface = classloader.defineClass(byteCode);
+            enhancer.setClassLoader(classloader);
+        }
+        enhancer.setInterfaces(new Class[] {targetJavaInterface});
+        return (Remote)enhancer.create();
+    }
+
+    protected Object invokeTarget(Operation op, Object[] args) throws InvocationTargetException {
+        return wire.invoke(op, args);
+    }
+
+    /**
+     * if the interface of the component whose serviceBindings must be exposed as RMI Service, does not
+     * implement java.rmi.Remote, then generate such an interface. This method will stop with just 
+     * generating the bytecode. Defining the class from the byte code must be the responsibility of the 
+     * caller of this method, since it requires a ClassLoader to be created to define and load this interface.
+     */
+    protected byte[] generateRemoteInterface(Class serviceInterface) {
+        String interfazeName = serviceInterface.getCanonicalName();
+        ClassWriter cw = new ClassWriter(false);
+
+        String simpleName = serviceInterface.getSimpleName();
+        cw.visit(Constants.V1_5, Constants.ACC_PUBLIC + Constants.ACC_ABSTRACT + Constants.ACC_INTERFACE, interfazeName
+            .replace('.', '/'), "java/lang/Object", new String[] {"java/rmi/Remote"}, simpleName + ".java");
+
+        StringBuffer argsAndReturn = null;
+        Method[] methods = serviceInterface.getMethods();
+        for (Method method : methods) {
+            argsAndReturn = new StringBuffer("(");
+            Class[] paramTypes = method.getParameterTypes();
+            Class returnType = method.getReturnType();
+
+            for (Class paramType : paramTypes) {
+                argsAndReturn.append(Type.getType(paramType));
+            }
+            argsAndReturn.append(")");
+            argsAndReturn.append(Type.getType(returnType));
+
+            cw.visitMethod(Constants.ACC_PUBLIC + Constants.ACC_ABSTRACT,
+                           method.getName(),
+                           argsAndReturn.toString(),
+                           new String[] {"java/rmi/RemoteException"},
+                           null);
+        }
+        cw.visitEnd();
+        return cw.toByteArray();
+    }
+
+    protected 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();
+    }
+
+    protected class RMIServiceClassLoader extends ClassLoader {
+        public RMIServiceClassLoader(ClassLoader parent) {
+            super(parent);
+        }
+
+        public Class defineClass(byte[] byteArray) {
+            return defineClass(null, byteArray, 0, byteArray.length);
+        }
+    }
+}