com.github.sdnwiselab.sdnwise.function.HelloWorld Maven / Gradle / Ivy

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/* 
 * Copyright (C) 2015 SDN-WISE
 *
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU 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 General Public License
 * along with this program.  If not, see .
 */
package com.github.sdnwiselab.sdnwise.function;

import com.github.sdnwiselab.sdnwise.flowtable.FlowTableEntry;
import com.github.sdnwiselab.sdnwise.packet.NetworkPacket;
import com.github.sdnwiselab.sdnwise.util.Neighbor;
import com.github.sdnwiselab.sdnwise.util.NodeAddress;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.Locale;
import java.util.concurrent.ArrayBlockingQueue;
import org.bouncycastle.util.Strings;

/**
 *
 * @author Sebastiano Milardo
 */
public class HelloWorld implements FunctionInterface {

     /**
     * Implements the function method of FunctionInterface. 
     * A node can learn new functions that will be executed by using an
     * action SDN_WISE_FORWARD_UP and the corresponding ID of the function.
     * A function can be installed in a node by using the sendFunction method
     * of a controller.
     * 
     * @param adcRegister an HashMap containing measurement info.
     * @param flowTable an ArrayList containing the FlowTable of the node.
     * @param neighborTable an ArrayList containing the Neighbors table of 
     * the node. 
     * @param statusRegister an int[] containing the status of the node.
     * @param acceptedId an ArrayList of NodeAddress containing the aliases 
     * for the address of the node.
     * @param messageQueue the incoming message queue. Add a message here in 
     * order to match it in the FlowTable.
     * @param np the NetworkPacket that triggered this function.
     */
    
    @Override
    public void function(
            HashMap adcRegister, 
            ArrayList flowTable, 
            ArrayList neighborTable, 
            int[] statusRegister, 
            ArrayList acceptedId, 
            ArrayBlockingQueue messageQueue,
            NetworkPacket np
    ) {
        
        System.out.println("Hello, World!");
        String payload = Strings.fromUTF8ByteArray(np.getPayload()); 
        
        NodeAddress tmp = np.getDst();
        np.setDst(np.getSrc());
        np.setSrc(tmp);
        np.setPayload(Strings.toUTF8ByteArray(payload.toUpperCase(Locale.ENGLISH)));
        
        messageQueue.add(np.toIntArray());
    }   
}