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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.jsonrpc.provider;
import java.util.ArrayList;
import java.util.List;
import javax.servlet.Servlet;
import org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.interfacedef.Interface;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.interfacedef.java.JavaInterface;
import org.apache.tuscany.sca.invocation.MessageFactory;
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;
/**
* Implementation of the JSONRPC Binding Provider for Services
*
* @version $Rev$ $Date$
*/
public class JSONRPCServiceBindingProvider implements ServiceBindingProvider {
private MessageFactory messageFactory;
private RuntimeEndpoint endpoint;
private RuntimeComponent component;
private RuntimeComponentService service;
private InterfaceContract serviceContract;
private JSONRPCBinding binding;
private ServletHost servletHost;
private List<String> servletMappings = new ArrayList<String>();
public JSONRPCServiceBindingProvider(RuntimeEndpoint endpoint,
MessageFactory messageFactory,
ServletHost servletHost) {
this.endpoint = endpoint;
this.component = (RuntimeComponent)endpoint.getComponent();
this.service = (RuntimeComponentService)endpoint.getService();
this.binding = (JSONRPCBinding) endpoint.getBinding();
this.messageFactory = messageFactory;
this.servletHost = servletHost;
//clone the service contract to avoid databinding issues
try {
this.serviceContract = (InterfaceContract)service.getInterfaceContract().clone();
} catch(CloneNotSupportedException e) {
this.serviceContract = service.getInterfaceContract();
}
JSONRPCDatabindingHelper.setDataBinding(serviceContract.getInterface());
}
public InterfaceContract getBindingInterfaceContract() {
return serviceContract;
}
public boolean supportsOneWayInvocation() {
return false;
}
public void start() {
// Set default databinding to json
// replaced by JSONRPCDatabindingHelper.setDataBinding(serviceContract.getInterface()); above
//serviceContract.getInterface().resetDataBinding(JSONDataBinding.NAME);
// Determine the service business interface
Class<?> serviceInterface = getTargetJavaClass(serviceContract.getInterface());
// Create a Java proxy to the target service
Object proxy = component.getComponentContext().getServiceReference(serviceInterface, endpoint).getService();
// Create and register a Servlet for this service
JsonRpcServlet serviceServlet =
new JsonRpcServlet(messageFactory, endpoint, serviceInterface, proxy);
String mapping = registerServlet(serviceServlet);
servletMappings.add(mapping);
}
public String registerServlet(Servlet servlet) {
// Create our HTTP service listener Servlet and register it with the
// Servlet host
String servletMapping = binding.getURI();
if (!servletMapping.endsWith("/")) {
servletMapping += "/";
}
if (!servletMapping.endsWith("*")) {
servletMapping += "*";
}
String mappedURI = servletHost.addServletMapping(servletMapping, servlet);
String deployedURI = mappedURI;
if (deployedURI.endsWith("*")) {
deployedURI = deployedURI.substring(0, deployedURI.length() - 1);
}
binding.setURI(deployedURI);
endpoint.setDeployedURI(deployedURI);
return mappedURI;
}
public void stop() {
// Remove the Servlet mappings we've added
for (String mapping: servletMappings) {
servletHost.removeServletMapping(mapping);
}
}
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();
}
}
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