/*
 * 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.binding.jsonrpc;

import java.io.IOException;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import javax.servlet.http.HttpSession;

import com.metaparadigm.jsonrpc.JSONRPCBridge;
import com.metaparadigm.jsonrpc.JSONRPCServlet;

/**
 * 
 * 
 */
public class JSONRPCEntryPointServlet extends JSONRPCServlet {
    private static final long serialVersionUID = 1L;

    String serviceName;

    Object serviceInstance;

    public JSONRPCEntryPointServlet(String serviceName, Object serviceInstance) {
        this.serviceName = serviceName;
        this.serviceInstance = serviceInstance;

    }

    /*
     * (non-Javadoc)
     * 
     * @see com.metaparadigm.jsonrpc.JSONRPCServlet#service(javax.servlet.http.HttpServletRequest, javax.servlet.http.HttpServletResponse)
     */
    @Override
    public void service(HttpServletRequest request, HttpServletResponse response) throws IOException, ClassCastException {

        /*
         * Create a new bridge for every request to aviod all the problems with JSON-RPC-Java storing the bridge in the session
         */
        HttpSession session = request.getSession();
        try {

            JSONRPCBridge jsonrpcBridge = new JSONRPCBridge();
            jsonrpcBridge.registerObject(serviceName, serviceInstance);
            session.setAttribute("JSONRPCBridge", jsonrpcBridge);

            super.service(request, response);

        } finally {
            session.removeAttribute("JSONRPCBridge");
        }
    }
}