com.conwet.silbops.connectors.comet.handlers.SubscribeResponse.java Source code

Introduction

Here is the source code for com.conwet.silbops.connectors.comet.handlers.SubscribeResponse.java

Source

package com.conwet.silbops.connectors.comet.handlers;

/*
 * #%L
 * SilboPS Service
 * %%
 * Copyright (C) 2011 - 2014 CoNWeT Lab., Universidad Politcnica de Madrid
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU Affero General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU Affero General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 * #L%
 */

import com.conwet.silbops.apibroker.EndPoint;
import com.conwet.silbops.broker.Broker;
import com.conwet.silbops.connectors.comet.ConnectionStatus;
import com.conwet.silbops.connectors.comet.HttpEndPoint;
import com.conwet.silbops.msg.SubscribeMsg;
import com.conwet.silbops.model.Subscription;
import java.io.IOException;
import java.io.PrintWriter;
import javax.servlet.http.HttpServletRequest;
import javax.servlet.http.HttpServletResponse;
import org.json.simple.JSONObject;
import org.json.simple.JSONValue;

/**
 * This class handles the response for a subscribe command
 * 
 * @author sergio
 */
public class SubscribeResponse extends AbstractResponse {

    public SubscribeResponse(Broker broker, String recvMsg, ConnectionStatus status) {

        super(broker, recvMsg, status);
    }

    @Override
    protected void reply(HttpServletRequest req, HttpServletResponse res, PrintWriter writer,
            HttpEndPoint httpEndPoint, EndPoint connection) {
        try {
            String subscription = retriveParameter(req, "subscription");
            JSONObject jsonSubscription = (JSONObject) JSONValue.parseWithException(subscription);

            if (jsonSubscription.isEmpty()) {

                writeOut(writer, httpEndPoint.getEndPoint(), "subscription is empty");

            } else {

                SubscribeMsg msg = new SubscribeMsg();
                msg.setSubscription(Subscription.fromJSON(jsonSubscription));

                logger.debug("Endpoint {}, Subscribe: {}", httpEndPoint, msg);
                broker.receiveMessage(msg, connection);
                writeOut(writer, httpEndPoint.getEndPoint(), "subscribe success");
            }
        } catch (Exception ex) {
            logger.warn("subscribe exception: {}", ex.getMessage());

            try {
                res.sendError(HttpServletResponse.SC_BAD_REQUEST);
            } catch (IOException ex1) {
                logger.warn("subscribe reply exception: {}", ex1.getMessage());
            }
        }
    }

    @Override
    protected boolean supportPublisherOperations() {

        return false;
    }

    @Override
    protected boolean supportSubscriberOperations() {

        return true;
    }
}