root/vtcross/trunk/src/cognitive_engines/DSA_CE/DSA_CognitiveEngine.cpp @ 529

/*
 Copyright 2009 Virginia Polytechnic Institute and State University  

 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. 
*/

/*! This file provides an implemention of a CBR-based CE that works with the
 * provided test scripts and configuration filse.
 */

#include <cstdlib>
#include <cstring>
#include <stdint.h>
#include <cmath>
#include <string>

#include "vtcross/cbr.h"
#include "vtcross/cognitive_engine.h"
#include "vtcross/common.h"
#include "vtcross/components.h"
#include "vtcross/containers.h"
#include "vtcross/debug.h"
#include "vtcross/error.h"
#include "vtcross/socketcomm.h"


#define INTERFERENCE 0

#define CHANNEL 1

#define ENERGY 0
#define COMMUNICATION_TIME 1

#define UTILITY 4


static CBR *myCBR;


CognitiveEngine::CognitiveEngine()
{
    LOG("Creating Cognitive Engine.\n");
    SML_present = false;
    commandSocketFD = -1;
    srand(time(NULL));
}


CognitiveEngine::~CognitiveEngine()
{
    delete myCBR;

    delete [] pList;
    delete [] oList;
    delete [] uList;
    delete [] radioInfo;
}


CognitiveEngine::CognitiveEngine(const char *serverName, const char *serverPort, \
        const bool SML)
{
    LOG("Creating Cognitive Engine.\n");

    pList = new Parameter[10];
    oList = new Observable[10];
    uList = new Utility[10];
    radioInfo = new Radio_Info;

    ConnectToRemoteComponent(serverName, serverPort, SML);
}


void
CognitiveEngine::SendComponentType()
{
    SendMessage(commandSocketFD, "response_engine_cognitive");
    LOG("Cognitive Engine responded to GetRemoteComponentType query.\n");
}


void
CognitiveEngine::ConnectToRemoteComponent(const char *serverName, \
        const char *serverPort, const bool SML)
{
    commandSocketFD = ClientSocket(serverName, serverPort);

    SML_present = SML;

    if(SML) {
        
        RegisterComponent();
        LOG("Cognitive Engine connected to SML at %s.\n", serverName);
        ReceiveRadioConfiguration();
        ReceiveExperience();
        
        RegisterServices();
    }
    else {
        RegisterComponent();
        LOG("Cognitive Engine connected to shell at %s.\n", serverName);
        ReceiveRadioConfiguration();
        ReceiveExperience();
    }
}

void 
CognitiveEngine::ReceiveFeedback(Observable *observables, Parameter *parameters)
{ 
   LOG("Cognitive Engine:: Receiving feedback.\n");
    
    uint32_t numberColumns = 
        radioInfo->numParameters;

    uint32_t obsColumns = radioInfo->numObservables + 1;
    uint32_t numberTotalColumns = radioInfo->numUtilities +
                                radioInfo->numParameters +
                                radioInfo->numObservables + 1;

    float valList[numberColumns];
    float obsVals[numberColumns];
    string nameList[numberColumns];
    string obsList[obsColumns];
    string searchNames[1];
    float searchVals[1];
    int searchOps[1];
    float returnValues[numberTotalColumns];

    size_t columnObsIndex = 0;
    for (size_t i = 0; i < radioInfo->numObservables; i++){
        obsList[columnObsIndex] = observables[i].name;
        columnObsIndex++;
    }  
    obsList[columnObsIndex] = "utility";

    size_t columnIndex = 0;
    for (size_t i = 0; i < radioInfo->numParameters; i++){
        nameList[columnIndex] = parameters[i].name;
        columnIndex++;
    }   

    size_t obsValueIndex = 0;
    for(size_t i = 0; i < radioInfo->numObservables; i++) {
        obsVals[obsValueIndex] = observables[i].value;
        obsValueIndex++;
    }

    /* Make sure we do not return any entries for the current channel */
    std::string channel_name = "channel";
    searchNames[0] = channel_name;
    searchOps[0] = 0;
    searchVals[0] = parameters[0].value; 

    /* Execute CBR search and put output into returnValues */
    myCBR->Search(searchNames, searchOps, searchVals,
            1, returnValues);

    /* Calculate Utility */
    float oldUtilityValue = returnValues[UTILITY];
   

    //////////////////////////////////////////////
    //
    //  BEGIN CORE DSA ALGORITHM UTILITY FUNCTION
    //
    //////////////////////////////////////////////
 
    // Set DSA utility to take into account both the previously sensed
    //  energy and the average communication time.

    float newUtilityValue = oldUtilityValue + observables[COMMUNICATION_TIME].value;

    // If communication time value is set, we know we need to change channels because of PU.
    // So we should lower the utility for this channel.

    int reward = 20;
    int punishment = -100;
    int Detection_Threshold = 10000000;

    if((observables[COMMUNICATION_TIME].value != 0) || (observables[ENERGY].value > Detection_Threshold)) { 
        printf("Cognitive Engine:: Possible PU Detection - Decrementing Utility. %f %f",observables[COMMUNICATION_TIME].value,observables[ENERGY].value);
        newUtilityValue = newUtilityValue + punishment;
    } else {
        printf("Cognitive Engine:: Scan Mode:: No PU detected - Incrementing Utility.");
        newUtilityValue = newUtilityValue + reward;
    }

    if(newUtilityValue <= 100)
        newUtilityValue = 100;

    // Put limit on utility score to prevent a positive feedback loop 
    if(newUtilityValue >= 800)
        newUtilityValue = 800;

    obsVals[obsValueIndex] = newUtilityValue;

    //////////////////////////////////////////////
    //
    //  END CORE DSA ALGORITHM UTILITY FUNCTION
    //
    //////////////////////////////////////////////


    size_t returnValueIndex = 0;
    for(size_t i = 0; i < radioInfo->numParameters; i++) {
        valList[returnValueIndex] = parameters[i].value;
        returnValueIndex++;
    }

    myCBR->Update(nameList, obsList, valList, obsVals, 
            numberColumns, obsColumns);
}


void 
CognitiveEngine::WaitForSignal()
{
    char buffer[256];

    while(true) {
        memset(buffer, 0, 256);
       
        ReadMessage(commandSocketFD, buffer);

        // TODO this is ugly... is there a better way? Doesn't strcmp compare the
        // whole string?  We only need to compare until we find a single different
        // byte...
        //
        // If we send integer op codes rather than strings, this process will be
        // MUCH faster since instead of donig string compares we can simply
        // switch on the integer value...
        if(strcmp(buffer, "update_performance") == 0) {
            
            /* Receive Set of current Parameters */
            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            uint32_t numParameters = atoi(buffer);
   
            Parameter *p = new Parameter[numParameters];
 
            for(size_t i = 0; i < numParameters; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                p[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                p[i].value = atof(buffer);
            } 

            /* Receive Set of Observables */
            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            uint32_t numObservables = atoi(buffer);
   
            Observable *o = new Observable[numObservables];
 
            for(size_t i = 0; i < numObservables; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].value = atof(buffer);
            }  

            ReceiveFeedback(o,p);

            delete [] o;
            delete [] p;
        } 
        else if(strcmp(buffer, "request_optimization_service") == 0) {
            // THIS IS CURRENTLY IN DEMO MODE            


            /* Receive Set of Observables */
            LOG("\nCognitive Engine:: Receiving service name\n");

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD,buffer);
            LOG("\nCognitive Engine:: Got service name, %s\n", buffer);

            /* Receive Set of Observables */
            LOG("\nCognitive Engine:: Receiving Observable Parameters\n");

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD,buffer);
            uint32_t numObservables = atoi(buffer);
   
            Observable *o = new Observable[numObservables];
 
            for(size_t i = 0; i < numObservables; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].value = atof(buffer);
            }  

            /* Receive Set of current Parameters */
            LOG("Cognitive Engine:: Receiving Current Transmission Parameters\n");

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            uint32_t numCurrentParameters = atoi(buffer);
   
            Parameter *cp = new Parameter[numCurrentParameters];
 
            for(size_t i = 0; i < numCurrentParameters; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                cp[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                cp[i].value = atof(buffer);
            }  
            LOG("Cognitive Engine:: Processing parameters....\n");

            // TODO need to actually do something with the observables here
           
            LOG("Cognitive Engine:: Sending Optimal Parameters to Application.\n");
            char numParametersChar[10];
            sprintf(numParametersChar, "%i", radioInfo->numParameters);
            SendMessage(commandSocketFD, numParametersChar);
            for(size_t i = 0; i < radioInfo->numParameters; i++) {
                SendMessage(commandSocketFD, "test");
                SendMessage(commandSocketFD, "00");
            }

            delete [] o;
            delete [] cp;
        }
        else if(strcmp(buffer, "request_optimization") == 0) {
            
            /* Receive Set of Observables */
            LOG("\nCognitive Engine:: Receiving Observable Parameters\n");

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD,buffer);
            uint32_t numObservables = atoi(buffer);
   
            Observable *o = new Observable[numObservables];
 
            for(size_t i = 0; i < numObservables; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                o[i].value = atof(buffer);
            }  

            /* Receive Set of current Parameters */
            LOG("Cognitive Engine:: Receiving Current Transmission Parameters\n");

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            uint32_t numCurrentParameters = atoi(buffer);
   
            Parameter *cp = new Parameter[numCurrentParameters];
 
            for(size_t i = 0; i < numCurrentParameters; i++) {
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                cp[i].name = std::string(buffer);
    
                memset(buffer, 0, 256);
                ReadMessage(commandSocketFD, buffer);
                cp[i].value = atof(buffer);
            }  
            LOG("Cognitive Engine:: Processing parameters....\n");

            Parameter *solutionSet;
            
            solutionSet = GetSolution(o,cp);

            // TODO need to actually do something with the observables here
           
            LOG("Cognitive Engine:: Sending Optimal Parameters to Application.\n");
            char numParametersChar[10];
            char solutionValue[50];
            sprintf(numParametersChar, "%i", radioInfo->numParameters);
            SendMessage(commandSocketFD, numParametersChar);
            for(size_t i = 0; i < radioInfo->numParameters; i++) {
                SendMessage(commandSocketFD, solutionSet[i].name.c_str());
                memset(solutionValue, 0, 50);
                sprintf(solutionValue, "%f", solutionSet[i].value);
                SendMessage(commandSocketFD, solutionValue);
            }

            delete [] o;
            delete [] cp;
        }
        else if(strcmp(buffer, "query_component_type") == 0) {
            SendComponentType();
        }
        else if(strcmp(buffer, "connect_sml") == 0) {
            /* This command implies that we are disconnecting from the shell and
             * connecting to a SML component. */
            char serverName[256];
            char serverPort[256];
            // TODO is this going to end up being too slow?
            memset(serverName, 0, 256);
            memset(serverPort, 0, 256);

            ReadMessage(commandSocketFD, serverName);
            ReadMessage(commandSocketFD, serverPort);

            /* Only continue if we are currently connected to a shell. */
            if(!SML_present) {
                DeregisterComponent();

                shutdown(commandSocketFD, 2);
                close(commandSocketFD);

                ConnectToRemoteComponent(serverName, serverPort, true);
            }
        }
        else if(strcmp(buffer, "disconnect_sml") == 0) {
            /* This command implies that we are disconnecting from the SML and
             * connecting to a shell component. */
            char serverName[256];
            char serverPort[256];
            // TODO is this going to end up being too slow?
            memset(serverName, 0, 256);
            memset(serverPort, 0, 256);

            ReadMessage(commandSocketFD, serverName);
            ReadMessage(commandSocketFD, serverPort);

            /* We only want to do this if we are actually connected to an SML
             * currently. */
            if(SML_present) {
                DeregisterServices();

                shutdown(commandSocketFD, 2);
                close(commandSocketFD);

                ConnectToRemoteComponent(serverName, serverPort, false);
            }
        }
        else if(strcmp(buffer, "reset_engine_cognitive") == 0) {
            Reset();
        }
        else if(strcmp(buffer, "shutdown_engine_cognitive") == 0) {
            Shutdown();
        }
    }
}


void 
CognitiveEngine::Shutdown()
{
    if(SML_present) {
        //DeregisterServices();
        DeregisterComponent();
    } 
    else {
        DeregisterComponent();
    }
    // TODO should something else be happening here?
}


void
CognitiveEngine::Reset()
{
    LOG("Resetting Cognitive Engine.\n");

    if(SML_present) {
        DeregisterServices();
        DeregisterComponent();
    } 
    else {
        DeregisterComponent();
    }
}


void
CognitiveEngine::RegisterComponent()
{
    char buffer[256];
    SendMessage(commandSocketFD, "register_engine_cognitive");
    LOG("Cognitive Engine:: Registration message sent to shell.\n");

    memset(buffer, 0, 256);
    ReadMessage(commandSocketFD, buffer);
}

void 
CognitiveEngine::DeregisterComponent()
{
    SendMessage(commandSocketFD, "deregister_engine_cognitive");
    LOG("Cognitive Engine:: Deregistration message sent.\n");

    shutdown(commandSocketFD, 2);
    close(commandSocketFD);
    commandSocketFD = -1;
    LOG("Cognitive Engine:: Shell socket closed.\n");
}


void 
CognitiveEngine::RegisterServices()
{
    LOG("Cognitive Engine:: Registering services.\n");

    SendMessage(commandSocketFD, "register_service");
    SendMessage(commandSocketFD, "test_srv");

    SendMessage(commandSocketFD, "register_service");
    SendMessage(commandSocketFD, "test_srv1");

    SendMessage(commandSocketFD, "register_service");
    SendMessage(commandSocketFD, "test_srv2");

    SendMessage(commandSocketFD, "register_service");
    SendMessage(commandSocketFD, "test_srv3");

}

//Combined with deregister component since those two things must happen togeather
void 
CognitiveEngine::DeregisterServices()
{
    LOG("Cognitive Engine:: Deregistering services.\n");

    SendMessage(commandSocketFD, "deregister_service");
    SendMessage(commandSocketFD, "test_srv");

    SendMessage(commandSocketFD, "deregister_service");
    SendMessage(commandSocketFD, "test_srv1");

    SendMessage(commandSocketFD, "deregister_service");
    SendMessage(commandSocketFD, "test_srv2");

    SendMessage(commandSocketFD, "deregister_service");
    SendMessage(commandSocketFD, "test_srv3");

}

void 
CognitiveEngine::ReceiveRadioConfiguration()
{
    LOG("Cognitive Engine:: Receiving Radio Configuration.\n");
    
    char buffer[256];
 
    /* Receive Set of Utilities */
    memset(buffer, 0, 256);
    ReadMessage(commandSocketFD, buffer);
    radioInfo->numUtilities = atoi(buffer);

    for(size_t i = 0; i < radioInfo->numUtilities; i++) {
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        uList[i].name = std::string(buffer);
   
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        uList[i].units = std::string(buffer);

        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        uList[i].goal = std::string(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        uList[i].target = atof(buffer);
    }

    /* Receive Set of Parameters */
    memset(buffer, 0, 256);
    ReadMessage(commandSocketFD, buffer);
    radioInfo->numParameters = atoi(buffer);
    
    for(size_t i = 0; i < radioInfo->numParameters; i++) {
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        pList[i].name = std::string(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        pList[i].units = std::string(buffer);

        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        pList[i].min = atof(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        pList[i].max = atof(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        pList[i].step = atof(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD,buffer);
        pList[i].numAffects = atoi(buffer);
    
        for(size_t j = 0; j < pList[i].numAffects; j++) {
            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD,buffer);
            // TODO for + if{break} = while?
            for(size_t k = 0; k < radioInfo->numUtilities; k++) {
                if(uList[k].name == std::string(buffer)) {    
                    pList[i].affection_list[j].u = &uList[k];   
                    break;
                }
            }

            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            pList[i].affection_list[j].relation = std::string(buffer);   
        }
    }   

    /* Receive Set of Observables */
    memset(buffer, 0, 256);
    ReadMessage(commandSocketFD, buffer);
    radioInfo->numObservables = atoi(buffer);
    
    for(size_t i = 0; i < radioInfo->numObservables; i++) {
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        oList[i].name = std::string(buffer);
    
        memset(buffer, 0, 256);
        ReadMessage(commandSocketFD, buffer);
        oList[i].numAffects = atoi(buffer);
    
        for(size_t j = 0; j < oList[i].numAffects; j++) {
            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            // TODO for + if{break} = while?
            for(size_t k = 0; k < radioInfo->numUtilities; k++) {
                if(uList[k].name == std::string(buffer)){    
                    oList[i].affection_list[j].u = &uList[k];   
                    break;
                }
            }
 
            memset(buffer, 0, 256);
            ReadMessage(commandSocketFD, buffer);
            oList[i].affection_list[j].relation = std::string(buffer);   
        }
    }

    SendMessage(commandSocketFD, "receive_config_ack");

    BuildCognitiveEngine();
}

void 
CognitiveEngine::ReceiveExperience()
{
    LOG("Cognitive Engine:: Receiving Experience Report.\n");
    char buffer[256];
    uint32_t numberExp;
    
    /* Receive number of experience entries */
    memset(buffer, 0, 256);
    ReadMessage(commandSocketFD, buffer);
    numberExp = atoi(buffer);

    LOG("Cognitive Engine:: Waiting for %i number of entries.\n", numberExp);
 
    SendMessage(commandSocketFD, "receive_exp_ack");
}


/* The core of the CE is this function */

Parameter* 
CognitiveEngine::GetSolution(Observable *observables, Parameter *currentParameters)
{
    LOG("Cognitive Engine:: Generating solution.\n");

    /* Put together the CBR search array */

    uint32_t channel = 0;
    string searchNames[1];
    string sumSearchName;
    float searchVals[1];
    float utilArray[(int)pList[0].max];
    int searchOps[1];
    uint32_t numberColumns = radioInfo->numUtilities + radioInfo->numParameters + \
                             radioInfo->numObservables + 1;

    float returnValues[numberColumns];
    float sumRetVals[numberColumns];
   
    // Total sum of utilities in sumRetVals[0]

    string channel_name = "channel";
    string utility_name = "utility";

    for(int32_t i = 0 ; i < pList[0].max ; i++ ) {
        searchNames[0] = pList[0].name;
        searchOps[0] = 0;
        searchVals[0] = i+1; 
    
        uint32_t rc = myCBR->Search(searchNames, searchOps, searchVals,
            1, returnValues);

        if(rc == 31337) {
                // No entry - must add
                
                string rowNames[numberColumns];
                size_t rowIndex = 0;
                for(size_t j = 0; j < radioInfo->numUtilities; j++) {
                        rowNames[rowIndex] = uList[j].name;
                        rowIndex++;
                }
                for(size_t j = 0; j < radioInfo->numParameters; j++) {
                        rowNames[rowIndex] = pList[j].name;
                        if(pList[j].name == "channel")
                                returnValues[rowIndex] = i+1;
                        rowIndex++;
                }
                for(size_t j = 0; j < radioInfo->numObservables; j++) {
                        rowNames[rowIndex] = oList[j].name;
                        rowIndex++;
                }
   
                rowNames[rowIndex] = utility_name;
                returnValues[rowIndex] = 500;

                /* Add the new optimized set to the CBR database */

                myCBR->AddRow(rowNames, returnValues, numberColumns);
        }

        utilArray[i] = returnValues[UTILITY]; 
    }

    printf("Current Channel Utility Scores\n");
    printf("1: %f\t7: %f\t8: %f\t14: %f\n",utilArray[0],utilArray[1],utilArray[2],utilArray[3]);    
    // Get sum of all the channel utilities.
    sumSearchName = utility_name;
    uint32_t rc = myCBR->SearchSum(sumSearchName, sumRetVals);

    // Psuedo random channel selection based upon utility.
    int k = rand() % (int)sumRetVals[0];
    int cdf_total(0);

    for ( int i = 0; i < pList[0].max; i++ ) {
        cdf_total += utilArray[i];
        if(k < cdf_total) {
                channel = i + 1;
                break;
        }
    }
        
    searchNames[0] = pList[0].name;
    searchOps[0] = 0;
    searchVals[0] = channel; 
  
    rc = myCBR->Search(searchNames, searchOps, searchVals,
        1, returnValues);


    //returnValues[CHANNEL] = rand() % (int)pList[0].max + (int)pList[0].min; 
    returnValues[CHANNEL] = channel;

    printf("Cognitive Engine:: ..---===***### Channel %i has been selected ###***===---..\n",channel); 
    /* Package up the new set of parameters in order to add
       the new entry into the CBR database.  */

    size_t returnValueIndex = 0;
    for(size_t i = 0; i < radioInfo->numUtilities; i++) {
        uList[i].value = returnValues[returnValueIndex];
        returnValueIndex++;
    }
    for(size_t i = 0; i < radioInfo->numParameters; i++) {
        pList[i].value = returnValues[returnValueIndex];
        returnValueIndex++;
    }
    for(size_t i = 0; i < radioInfo->numObservables; i++) {
        oList[i].value = returnValues[returnValueIndex];
        returnValueIndex++;
    }
    //returnValues[returnValueIndex] = 0;

    string allNames[numberColumns];
    size_t allNameIndex = 0;
    for(size_t i = 0; i < radioInfo->numUtilities; i++) {
        allNames[allNameIndex] = uList[i].name;
        returnValues[allNameIndex] = uList[i].target;
        allNameIndex++;
    }
    for(size_t i = 0; i < radioInfo->numParameters; i++) {
        allNames[allNameIndex] = pList[i].name;
        allNameIndex++;
    }
    for(size_t i = 0; i < radioInfo->numObservables; i++) {
        allNames[allNameIndex] = oList[i].name;
    //    returnValues[allNameIndex] = 0;
        allNameIndex++;
    }
   
    allNames[allNameIndex] = utility_name;

    /* Add the new optimized set to the CBR database */
    //myCBR->AddRow(allNames, returnValues, returnValueIndex+1);


    /* Return the set of new parameter values.  */
    return pList;
}


Parameter* 
CognitiveEngine::GetSolution(Observable *observables, \
        Parameter *currentParameters, std::string service)
{
    LOG("Cognitive Engine:: Generating solution for %s service.\n", service.c_str());

    return pList;
}


void 
CognitiveEngine::ReceiveFeedback(Observable *observables, Parameter *parameters, \
    std::string service)
{
    LOG("Cognitive Engine:: Receiving feedback.\n");
}


void
CognitiveEngine::BuildCognitiveEngine()
{
    string filename = "ex1";
    string tablename = "data";

    uint32_t numberColumns = radioInfo->numUtilities + radioInfo->numParameters + \
                             radioInfo->numObservables + 1;

    string cols[numberColumns];

    size_t columnIndex = 0;
    for (size_t i = 0; i < radioInfo->numUtilities; i++){
        cols[columnIndex] = uList[i].name;
        columnIndex++;
    }   

    string paramCols[radioInfo->numParameters];
    size_t paramColumnIndex = 0;
    // Also need to make parameters the unique key 
    for (size_t i = 0; i < radioInfo->numParameters; i++){
        cols[columnIndex] = pList[i].name;
        paramCols[paramColumnIndex] = pList[i].name;
        columnIndex++;
        paramColumnIndex++;
    }  

    for (size_t i = 0; i < radioInfo->numObservables; i++){
        cols[columnIndex] = oList[i].name;
        columnIndex++;
    }   
   
    std::string utility_name = "utility"; 
    cols[columnIndex] = utility_name;

    myCBR = new CBR(filename, tablename, cols, paramCols, numberColumns, radioInfo->numParameters);
}