net.cellcloud.talk.HttpHeartbeatHandler.java Source code

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Here is the source code for net.cellcloud.talk.HttpHeartbeatHandler.java

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/*
-----------------------------------------------------------------------------
This source file is part of Cell Cloud.
    
Copyright (c) 2009-2013 Cell Cloud Team (www.cellcloud.net)
    
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
    
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
    
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.
-----------------------------------------------------------------------------
*/

package net.cellcloud.talk;

import java.io.ByteArrayInputStream;
import java.io.IOException;
import java.util.ArrayList;
import java.util.Queue;

import net.cellcloud.common.LogLevel;
import net.cellcloud.common.Logger;
import net.cellcloud.common.Message;
import net.cellcloud.common.Packet;
import net.cellcloud.core.Nucleus;
import net.cellcloud.http.AbstractJSONHandler;
import net.cellcloud.http.CapsuleHolder;
import net.cellcloud.http.HttpHandler;
import net.cellcloud.http.HttpRequest;
import net.cellcloud.http.HttpResponse;
import net.cellcloud.http.HttpSession;
import net.cellcloud.talk.stuff.PrimitiveSerializer;
import net.cellcloud.util.Utils;

import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;

/**
 * HTTP ?
 * 
 * @author Jiangwei Xu
 *
 */
public final class HttpHeartbeatHandler extends AbstractJSONHandler implements CapsuleHolder {

    protected static final String Identifier = "identifier";
    protected static final String Primitive = "primitive";
    protected static final String Primitives = "primitives";

    public HttpHeartbeatHandler() {
    }

    @Override
    public String getPathSpec() {
        return "/talk/hb";
    }

    @Override
    public HttpHandler getHttpHandler() {
        return this;
    }

    @Override
    protected void doGet(HttpRequest request, HttpResponse response) throws IOException {
        HttpSession session = request.getSession();
        if (null != session) {
            // 
            session.heartbeat();

            // ??
            Queue<Message> queue = session.getQueue();
            if (!queue.isEmpty()) {
                ArrayList<String> identifiers = new ArrayList<String>(queue.size());
                ArrayList<Primitive> primitives = new ArrayList<Primitive>(queue.size());
                for (int i = 0, size = queue.size(); i < size; ++i) {
                    // ?
                    Message message = queue.poll();
                    // 
                    Packet packet = Packet.unpack(message.get());
                    if (null != packet) {
                        // ?????
                        byte[] primData = packet.getSubsegment(0);
                        ByteArrayInputStream stream = new ByteArrayInputStream(primData);

                        // ???
                        Primitive prim = new Primitive(Nucleus.getInstance().getTagAsString());
                        prim.read(stream);

                        // 
                        identifiers.add(Utils.bytes2String(packet.getSubsegment(1)));
                        primitives.add(prim);
                    }
                }

                JSONArray jsonPrimitives = this.convert(identifiers, primitives);
                JSONObject json = new JSONObject();
                try {
                    json.put(Primitives, jsonPrimitives);
                } catch (JSONException e) {
                    Logger.log(getClass(), e, LogLevel.ERROR);
                }

                // ?
                this.respondWithOk(response, json);
            } else {
                this.respondWithOk(response);
            }
        } else {
            this.respond(response, HttpResponse.SC_INTERNAL_SERVER_ERROR);
        }
    }

    /**
     *  JSON 
     * @param queue
     * @return
     */
    private JSONArray convert(ArrayList<String> identifiers, ArrayList<Primitive> list) {
        JSONArray ret = new JSONArray();

        try {
            for (int i = 0, size = identifiers.size(); i < size; ++i) {
                String identifier = identifiers.get(i);
                Primitive prim = list.get(i);

                JSONObject primJson = new JSONObject();
                PrimitiveSerializer.write(primJson, prim);

                JSONObject json = new JSONObject();
                json.put(Identifier, identifier);
                json.put(Primitive, primJson);

                // 
                ret.put(json);
            }
        } catch (JSONException e) {
            // Nothing
        }

        return ret;
    }
}