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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.dwr;
import java.lang.reflect.InvocationHandler;
import java.lang.reflect.Method;
import java.lang.reflect.Proxy;
import org.apache.tuscany.sca.assembly.Binding;
import org.apache.tuscany.sca.extension.helper.ComponentLifecycle;
import org.apache.tuscany.sca.host.http.ServletHost;
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;
/**
* DWR Service.
*
* @version $Rev$ $Date$
*/
public class DWRService implements ComponentLifecycle {
private RuntimeComponent rc;
private RuntimeComponentService rcs;
private Binding binding;
private ServletHost servletHost;
static final String SERVLET_PATH = "/SCADomain/*";
public DWRService(RuntimeComponent rc, RuntimeComponentService rcs, Binding binding, DWRBinding ab, ServletHost servletHost) {
this.rc = rc;
this.rcs = rcs;
this.binding = binding;
this.servletHost = servletHost;
}
public void start() {
DWRServlet servlet = (DWRServlet) servletHost.getServletMapping(SERVLET_PATH);
if (servlet == null) {
servlet = new DWRServlet();
servletHost.addServletMapping(SERVLET_PATH, servlet);
}
// Create a Java proxy to the target service
Class<?> type = ((JavaInterface)rcs.getInterfaceContract().getInterface()).getJavaClass();
Object proxy = Proxy.newProxyInstance(type.getClassLoader(), new Class[]{type}, new InvocationHandler() {
public Object invoke(Object proxy, Method method, Object[] args) throws Throwable {
RuntimeWire wire = rcs.getRuntimeWire(binding);
Operation op = JavaInterfaceUtil.findOperation(method, rcs.getInterfaceContract().getInterface().getOperations());
return wire.invoke(op, args);
}});
servlet.addService(binding.getName(), type, proxy);
}
public void stop() {
servletHost.removeServletMapping(SERVLET_PATH);
}
}
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