org.jwebsocket.util.MongoDBConnectorsPacketQueue.java Source code

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Here is the source code for org.jwebsocket.util.MongoDBConnectorsPacketQueue.java

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//   ---------------------------------------------------------------------------
//   jWebSocket MongoDBConnectorsResponseBuffer (Community Edition, CE)
//   ---------------------------------------------------------------------------
//   Copyright 2010-2015 Innotrade GmbH (jWebSocket.org)
//   Alexander Schulze, Germany (NRW)
//
//   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 org.jwebsocket.util;

import com.mongodb.BasicDBObject;
import com.mongodb.DBCollection;
import com.mongodb.DBCursor;
import java.util.ArrayList;
import org.jwebsocket.api.IConnectorsPacketQueue;
import java.util.List;
import org.springframework.util.Assert;

/**
 *
 * @author Rolando Santamaria Maso
 */
public class MongoDBConnectorsPacketQueue implements IConnectorsPacketQueue {

    private final DBCollection mPackets;

    /**
     *
     * @param aPackets
     */
    public MongoDBConnectorsPacketQueue(DBCollection aPackets) {
        Assert.notNull(aPackets, "The packets collection argument is not valid!");

        mPackets = aPackets;
    }

    @Override
    public void enqueue(String aConnectorId, String aPacket) throws Exception {
        mPackets.save(new BasicDBObject().append("c", aConnectorId).append("p", aPacket));
    }

    @Override
    public List<String> dequeue(String aConnectorId) throws Exception {
        DBCursor lCursor = mPackets.find(new BasicDBObject().append("c", aConnectorId))
                .sort(new BasicDBObject().append("_id", 1));
        List<String> lList = new ArrayList<String>(lCursor.count());

        while (lCursor.hasNext()) {
            lList.add((String) lCursor.next().get("p"));
        }
        mPackets.remove(new BasicDBObject().append("c", aConnectorId));

        return lList;
    }

    @Override
    public void initialize() throws Exception {
        mPackets.createIndex(new BasicDBObject().append("c", 1));
    }

    @Override
    public void shutdown() throws Exception {
    }

    @Override
    public void clear(String aConnectorId) throws Exception {
        mPackets.remove(new BasicDBObject().append("c", aConnectorId));
    }

    @Override
    public void clearAll() throws Exception {
        mPackets.remove(new BasicDBObject());
    }

}