/*
* Copyright (C) 2010 Google Inc.
*
* Licensed 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 com.google.greaze.server;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import com.google.greaze.definition.webservice.RequestSpec;
import com.google.greaze.definition.webservice.ResponseBodyGsonTypeAdapterFactory;
import com.google.greaze.definition.webservice.ResponseSpec;
import com.google.greaze.definition.webservice.WebServiceCallSpec;
import com.google.greaze.definition.webservice.WebServiceRequest;
import com.google.greaze.definition.webservice.WebServiceResponse;
import com.google.greaze.webservice.server.RequestReceiver;
import com.google.greaze.webservice.server.ResponseSender;
import com.google.gson.Gson;
import com.google.gson.GsonBuilder;
import com.google.inject.Injector;
/**
* A dispatcher for all the procedural calls
*
* @author Inderjeet Singh
*/
public abstract class WebServiceDispatcher {
private final Injector injector;
public WebServiceDispatcher(Injector injector) {
this.injector = injector;
}
public void service(HttpServletRequest req, HttpServletResponse res) {
WebServiceCallSpec spec = injector.getInstance(WebServiceCallSpec.class);
RequestSpec requestSpec = spec.getRequestSpec();
ResponseSpec responseSpec = spec.getResponseSpec();
GsonBuilder gsonBuilder = injector.getInstance(GsonBuilder.class);
RequestReceiver requestReceiver = new RequestReceiver(gsonBuilder, requestSpec);
WebServiceRequest webServiceRequest = requestReceiver.receive(req);
Gson gson = injector.getInstance(GsonBuilder.class)
.registerTypeAdapterFactory(new ResponseBodyGsonTypeAdapterFactory(responseSpec.getBodySpec()))
.create();
ResponseSender responseSender = new ResponseSender(gson);
WebServiceResponse response = buildResponse(responseSpec, webServiceRequest);
responseSender.send(res, response);
}
protected abstract WebServiceResponse buildResponse(ResponseSpec responseSpec,
WebServiceRequest webServiceRequest);
}