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/*
*
* Copyright 2006 The Apache Software Foundation or its licensors as applicable
*
* Licensed 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.osgi.binding;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import java.util.Properties;
import javax.xml.namespace.QName;
import org.apache.tuscany.spi.component.CompositeComponent;
import org.apache.tuscany.spi.component.SCAObjectStartException;
import org.apache.tuscany.spi.extension.ServiceBindingExtension;
import org.apache.tuscany.spi.wire.WireService;
import org.apache.tuscany.osgi.OSGiHost;
import org.osgi.framework.ServiceFactory;
/**
* @version $Rev$ $Date$
*/
public class OSGiServiceBinding extends ServiceBindingExtension {
private static final QName BINDING_OSGI = new QName("http://tuscany.apache.org/xmlns/osgi/1.0", "binding.osgi");
private final String osgiServiceName;
//private final Class<? extends Object> service;
private OSGiHost host;
private WireService wireService;
/**
* Creates a new service instance
*
* @param name the name of the SCA service
* @param parent the containing composite
* @param wireService the wire service to use for creating proxies
* @param osgiServiceName the name to publish the service as to the OSGi hose
* @param host the OSGi host
*/
public OSGiServiceBinding(String name,
CompositeComponent parent,
WireService wireService,
String osgiServiceName,
OSGiHost host) {
super(name, parent);
this.osgiServiceName = osgiServiceName;
//this.service = service;
this.wireService = wireService;
this.host = host;
}
public void start() throws SCAObjectStartException {
super.start();
Properties properties = new Properties();
Object instance;
Class<?> clazz = inboundWire.getServiceContract().getInterfaceClass();
instance = wireService.createProxy(clazz, inboundWire);
if (instance instanceof ServiceFactory) {
host.registerService(osgiServiceName, instance, properties);
} else {
ServiceFactoryProxyHandler factoryProxy = new ServiceFactoryProxyHandler(instance);
Class<?> interfaces[] = instance.getClass().getInterfaces();
Class<?> proxyInterfaces[] = new Class<?>[interfaces.length + 1];
int i;
for (i = 0; i < interfaces.length; i++) {
proxyInterfaces[i] = interfaces[i];
}
proxyInterfaces[i] = ServiceFactory.class;
ClassLoader classLoader = instance.getClass().getClassLoader();
// TODO It seems we need a mixin capability for the service. We could add that to WireService
Object targetProxy = Proxy.newProxyInstance(classLoader, proxyInterfaces, factoryProxy);
host.registerService(osgiServiceName, targetProxy, properties);
}
//Register the service with OSGi
}
public void stop() {
super.stop();
//Unregister the service with OSGi
}
public QName getBindingType() {
return BINDING_OSGI;
}
private class ServiceFactoryProxyHandler implements InvocationHandler {
private Object instance;
public ServiceFactoryProxyHandler(Object instance) {
this.instance = instance;
}
public Object invoke(Object object, Method method, Object[] parms) throws Throwable {
if (method.getName().equals("getService")) {
return instance;
} else if (method.getName().equals("ungetService")) {
return null;
}
return method.invoke(instance, parms);
}
}
}
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