root/vtcross/trunk/src/cognitive_engines/DSA_CE/DSA_CognitiveEngine.cpp @ 391

/* Virginia Tech Cognitive Radio Open Source Systems
 * Virginia Tech, 2009
 *
 * LICENSE INFORMATION GOES HERE
 */

/* DESCRIPTION OF FILE.
 */


#include <cstdlib>
#include <cstring>
#include <stdint.h>
#include <math.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"
#include "vtcross/cbr.h"

// TODO this is really bad; need to move to a proper cbr.h
#include "cbr.c"

#include "sqlite3.h"
#include "sqlite3ext.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()
{
    cbr_free(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];
    char *nameList[numberColumns];
    char *obsList[obsColumns];
    char *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] = (char*)observables[i].name.c_str();
        columnObsIndex++;
    }  
   
    std::string utility_name = "utility"; 
    obsList[columnObsIndex] = (char*) utility_name.c_str();

    size_t columnIndex = 0;
    for (size_t i = 0; i < radioInfo->numParameters; i++){
        nameList[columnIndex] = (char*)parameters[i].name.c_str();
        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] = (char *) channel_name.c_str();
    searchOps[0] = EQ;
    searchVals[0] = parameters[0].value; 

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

    /* Calculate Utility */
    float oldUtilityValue = returnValues[UTILITY];
    
    // Set DSA utility to take into account both the previously sensed
    //  energy and the average communication time.

    

    float newUtilityValue = oldUtilityValue + ( -observables[ENERGY].value + 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.

    if(observables[COMMUNICATION_TIME].value != 0) { 
        newUtilityValue = newUtilityValue - 100;
    } else {
        newUtilityValue = newUtilityValue + 20;
    }


    if(newUtilityValue <= 0)
        newUtilityValue = 0;

    obsVals[obsValueIndex] = newUtilityValue;

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

    cbr_update(myCBR, 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;
    char *searchNames[1];
    char *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]

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

    for( int i = 0 ; i < pList[0].max ; i++ ) {

        searchNames[0] = (char*) pList[0].name.c_str();
        searchOps[0] = EQ;
        searchVals[0] = i+1; 
    
        uint32_t rc = cbr_search(myCBR, searchNames, searchOps, searchVals,
            1, returnValues);

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

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

                cbr_add_row(myCBR, rowNames, returnValues, numberColumns);
        }

        utilArray[i] = returnValues[UTILITY]; 
    }

        printf("1: %f\t2: %f\t3: %f\t4: %f\n",utilArray[0],utilArray[1],utilArray[2],utilArray[3]);    
    // Get sum of all the channel utilities.
    sumSearchName = (char *) utility_name.c_str();
    uint32_t rc = cbr_search_sum(myCBR, 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] = (char*) pList[0].name.c_str();
    searchOps[0] = EQ;
    searchVals[0] = channel; 
  
    rc = cbr_search(myCBR, searchNames, searchOps, searchVals,
        1, returnValues);


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

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

    /* Add the new optimized set to the CBR database */
    cbr_add_row(myCBR, 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()
{
    char filename[] = {"ex1"};
    char tablename[] = {"data"};

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

    char *cols[numberColumns];

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

    char *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] = (char*)pList[i].name.c_str();
        paramCols[paramColumnIndex] = (char*)pList[i].name.c_str();
        columnIndex++;
        paramColumnIndex++;
    }  

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

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