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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.net.URI;
import java.util.ArrayList;
import java.util.List;
import org.apache.tuscany.sca.binding.jsonrpc.JSONRPCBinding;
import org.apache.tuscany.sca.databinding.javabeans.SimpleJavaDataBinding;
import org.apache.tuscany.sca.databinding.json.JSONDataBinding;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.interfacedef.DataType;
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.invocation.MessageFactory;
import org.apache.tuscany.sca.provider.ServiceBindingProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
/**
* Implementation of the JSONRPC Binding Provider for Services
*
* @version $Rev$ $Date$
*/
public class JSONRPCServiceBindingProvider implements ServiceBindingProvider {
// Path to the scaDomain.js script
// Note: this is the same as the Ajax binding to keep the client code
// the same for clients using either the ajax or jsonrpc binding
private static final String SCA_DOMAIN_SCRIPT = "/SCADomain/scaDomain.js";
private MessageFactory messageFactory;
private RuntimeComponent component;
private RuntimeComponentService service;
private InterfaceContract serviceContract;
private JSONRPCBinding binding;
private ServletHost servletHost;
private List<String> servletMappings = new ArrayList<String>();
private String domainScriptMapping;
public JSONRPCServiceBindingProvider(RuntimeComponent component,
RuntimeComponentService service,
JSONRPCBinding binding,
MessageFactory messageFactory,
ServletHost servletHost) {
this.component = component;
this.service = service;
this.binding = binding;
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();
}
setDataBinding(serviceContract.getInterface());
}
public InterfaceContract getBindingInterfaceContract() {
return service.getInterfaceContract();
}
public boolean supportsOneWayInvocation() {
return false;
}
public void start() {
// Set default databinding to json
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().createSelfReference(serviceInterface, service).getService();
// Create and register a Servlet for this service
JSONRPCServiceServlet serviceServlet =
new JSONRPCServiceServlet(messageFactory, binding, service, serviceContract, serviceInterface, proxy);
String mapping = binding.getURI();
if (!mapping.endsWith("/")) {
mapping += "/";
}
if (!mapping.endsWith("*")) {
mapping += "*";
}
servletHost.addServletMapping(mapping, serviceServlet);
servletMappings.add(mapping);
servletHost.addServletMapping(binding.getURI(), serviceServlet);
servletMappings.add(binding.getURI());
// Register service to scaDomain.js
int port;
URI uri = URI.create(servletHost.getURLMapping(binding.getURI()).toString());
port = uri.getPort();
if (port == -1) {
port = servletHost.getDefaultPort();
}
// get the ScaDomainScriptServlet, if it doesn't yet exist create one
// this uses removeServletMapping / addServletMapping as there is no getServletMapping facility
domainScriptMapping = URI.create("http://localhost:" + port + SCA_DOMAIN_SCRIPT).toString();
ScaDomainScriptServlet scaDomainServlet =
(ScaDomainScriptServlet)servletHost.getServletMapping(domainScriptMapping);
if (scaDomainServlet == null) {
scaDomainServlet = new ScaDomainScriptServlet();
servletHost.addServletMapping(domainScriptMapping, scaDomainServlet);
}
// Add this service to the SCA Domain Script Servlet
scaDomainServlet.addService(binding.getName());
}
public void stop() {
// Remove the Servlet mappings we've added
for (String mapping: servletMappings) {
servletHost.removeServletMapping(mapping);
}
// Unregister the service from the SCA Domain Script Servlet
ScaDomainScriptServlet scaDomainServlet = (ScaDomainScriptServlet) servletHost.getServletMapping(domainScriptMapping);
if (scaDomainServlet != null) {
scaDomainServlet.removeService(binding.getName());
// Remove the Servlet if there's no more registered services
if (scaDomainServlet.getServiceNames().isEmpty()) {
servletHost.removeServletMapping(domainScriptMapping);
}
}
}
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();
}
private void setDataBinding(Interface interfaze) {
List<Operation> operations = interfaze.getOperations();
for (Operation operation : operations) {
operation.setDataBinding(JSONDataBinding.NAME);
DataType<List<DataType>> inputType = operation.getInputType();
if (inputType != null) {
List<DataType> logical = inputType.getLogical();
for (DataType inArg : logical) {
if (!SimpleJavaDataBinding.NAME.equals(inArg.getDataBinding())) {
inArg.setDataBinding(JSONDataBinding.NAME);
}
}
}
DataType outputType = operation.getOutputType();
if (outputType != null) {
if (!SimpleJavaDataBinding.NAME.equals(outputType.getDataBinding())) {
outputType.setDataBinding(JSONDataBinding.NAME);
}
}
}
}
}
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