/*
* 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.http.provider;
import java.net.URL;
import org.apache.tuscany.sca.binding.http.HTTPResourceBinding;
import org.apache.tuscany.sca.host.http.DefaultResourceServlet;
import org.apache.tuscany.sca.host.http.ServletHost;
import org.apache.tuscany.sca.interfacedef.InterfaceContract;
import org.apache.tuscany.sca.invocation.InvocationChain;
import org.apache.tuscany.sca.invocation.Invoker;
import org.apache.tuscany.sca.invocation.Message;
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.RuntimeWire;
/**
* Implementation of the Echo binding provider.
*/
public class HTTPResourceServiceBindingProvider implements ServiceBindingProvider {
private RuntimeComponentService service;
private HTTPResourceBinding binding;
private MessageFactory messageFactory;
private ServletHost servletHost;
private String uri;
public HTTPResourceServiceBindingProvider(RuntimeComponent component,
RuntimeComponentService service,
HTTPResourceBinding binding,
MessageFactory messageFactory,
ServletHost servletHost) {
this.service = service;
this.binding = binding;
this.messageFactory = messageFactory;
this.servletHost = servletHost;
uri = binding.getURI();
if (!uri.endsWith("/")) {
uri += "/";
}
if (!uri.endsWith("*")) {
uri += "*";
}
}
public InterfaceContract getBindingInterfaceContract() {
return service.getInterfaceContract();
}
public void start() {
// Get the target component implementation, for now we are assuming
// that it's an implementation.resource
RuntimeComponentService componentService = (RuntimeComponentService) service;
RuntimeWire wire = componentService.getRuntimeWire(binding);
// Get the getLocationURL invoker
Invoker getLocationInvoker = null;
for (InvocationChain invocationChain : wire.getInvocationChains()) {
String operationName = invocationChain.getSourceOperation().getName();
if (operationName.equals("getLocationURL")) {
getLocationInvoker = invocationChain.getHeadInvoker();
}
}
if (getLocationInvoker == null) {
throw new IllegalStateException("No getLocationURL operation found on target component");
}
// Get the location URL
Message message = messageFactory.createMessage();
message = getLocationInvoker.invoke(message);
URL locationURL = message.getBody();
// Register the default resource servlet with the servlet host
DefaultResourceServlet resourceServlet = new DefaultResourceServlet(locationURL.toString());
servletHost.addServletMapping(uri, resourceServlet);
}
public void stop() {
// Unregister from the hosting server
servletHost.removeServletMapping(uri);
}
}