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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.implementation.widget.provider;
import java.net.URI;
import javax.servlet.Servlet;
import org.apache.tuscany.sca.assembly.ComponentService;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.implementation.widget.WidgetImplementation;
import org.apache.tuscany.sca.interfacedef.Operation;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.provider.ImplementationProvider;
import org.apache.tuscany.sca.runtime.RuntimeComponent;
import org.apache.tuscany.sca.runtime.RuntimeComponentService;
import org.apache.tuscany.sca.web.javascript.ComponentJavaScriptGenerator;
/**
* The model representing a resource implementation in an SCA assembly model.
*
* @version $Rev$ $Date$
*/
class WidgetImplementationProvider implements ImplementationProvider {
private RuntimeComponent component;
private ComponentJavaScriptGenerator javaScriptGenerator;
private ServletHost servletHost;
private String widgetLocationURL;
private String widgetFolderURL;
private String widgetName;
private String scriptURI;
/**
* Constructs a new resource implementation provider.
*/
WidgetImplementationProvider(RuntimeComponent component,
WidgetImplementation implementation,
ComponentJavaScriptGenerator javaScriptGenerator,
ServletHost servletHost) {
this.component = component;
this.javaScriptGenerator = javaScriptGenerator;
this.servletHost = servletHost;
widgetLocationURL = implementation.getLocationURL().toString();
int s = widgetLocationURL.lastIndexOf('/');
widgetFolderURL = widgetLocationURL.substring(0, s);
widgetName = widgetLocationURL.substring(s +1);
widgetName = widgetName.substring(0, widgetName.lastIndexOf('.'));
}
public Invoker createInvoker(RuntimeComponentService service, Operation operation) {
WidgetImplementationInvoker invoker = new WidgetImplementationInvoker(component, javaScriptGenerator, widgetName, widgetFolderURL, widgetLocationURL);
return invoker;
}
public boolean supportsOneWayInvocation() {
return false;
}
public void start() {
String contextRoot = getContextRoot();
// get the ScaDomainScriptServlet, if it doesn't yet exist create one
// this uses removeServletMapping / addServletMapping as there is no getServletMapping facility
scriptURI = URI.create(contextRoot + "/" + this.widgetName + ".js").toString();
Servlet servlet = servletHost.getServletMapping(scriptURI);
if (servlet == null /*|| servlet instanceof HTTPGetListenerServlet*/) {
WidgetComponentScriptServlet widgetScriptServlet;
widgetScriptServlet = new WidgetComponentScriptServlet(this.component, javaScriptGenerator);
servletHost.addServletMapping(scriptURI, widgetScriptServlet);
}
}
public void stop() {
// Unregister the component client script Servlet
WidgetComponentScriptServlet widgetScriptServlet = (WidgetComponentScriptServlet) servletHost.getServletMapping(scriptURI);
if (widgetScriptServlet != null) {
// Remove the Servlet mapping
servletHost.removeServletMapping(scriptURI);
}
}
/**
* Get the contextRoot considering the HTTP Binding URI when in a embedded environment
* @return
*/
private String getContextRoot() {
String contextRoot = null;
for(ComponentService service : component.getServices()) {
if("Widget".equals(service.getName())) {
for(org.apache.tuscany.sca.assembly.Binding binding : service.getBindings()) {
if( binding.getClass().getName().contains("HTTPBinding")) {
contextRoot = binding.getURI();
}
}
}
}
return contextRoot == null ? "" : contextRoot;
}
}
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