/**
 *    Copyright 2012, Big Switch Networks, 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 net.floodlightcontroller.core.internal;

import java.util.concurrent.TimeUnit;

import net.floodlightcontroller.core.IOFSwitch;
import net.floodlightcontroller.threadpool.IThreadPoolService;

import org.openflow.protocol.OFFeaturesReply;
import org.openflow.protocol.OFMessage;
import org.openflow.protocol.OFType;

/**
 * A concrete implementation that handles asynchronously receiving
 * OFFeaturesReply
 * 
 * @author Shudong Zhou
 */
public class OFFeaturesReplyFuture extends
        OFMessageFuture<OFFeaturesReply> {

    protected volatile boolean finished;

    public OFFeaturesReplyFuture(IThreadPoolService tp,
            IOFSwitch sw, int transactionId) {
        super(tp, sw, OFType.FEATURES_REPLY, transactionId);
        init();
    }

    public OFFeaturesReplyFuture(IThreadPoolService tp,
            IOFSwitch sw, int transactionId, long timeout, TimeUnit unit) {
        super(tp, sw, OFType.FEATURES_REPLY, transactionId, timeout, unit);
        init();
    }

    private void init() {
        this.finished = false;
        this.result = null;
    }

    @Override
    protected void handleReply(IOFSwitch sw, OFMessage msg) {
        this.result = (OFFeaturesReply) msg;
        this.finished = true;
    }

    @Override
    protected boolean isFinished() {
        return finished;
    }

    @Override
    protected void unRegister() {
        super.unRegister();
        sw.cancelFeaturesReply(transactionId);
    }
}