long GenModelCplex::SetDirectParam(int whichparam, genmodel_param value, string type, string message)
{
int status = 0;
if (type == "dbl")
status = CPXsetdblparam(static_cast<CplexData*>(solverdata)->env, whichparam, value.dblval);
else if (type == "long")
status = CPXsetintparam(static_cast<CplexData*>(solverdata)->env, whichparam, value.longval);
else if (type == "str")
status = CPXsetstrparam(static_cast<CplexData*>(solverdata)->env, whichparam, value.strval);
if (status)
return ThrowError(getcplexerror(static_cast<CplexData*>(solverdata)->env, status) + string(". ") + message);
return 0;
}
int CPLEXInitialize() {
int Status = 0;
//First I open the CPLEX environment if it is not already open
if (CPLEXenv == NULL) {
CPLEXenv = CPXopenCPLEX (&Status);
}
if (CPLEXenv == NULL || Status) {
FErrorFile() << "Failed to initialize CPLEX environment. Check license server on aterneus." << endl;
FlushErrorFile();
return FAIL;
}
//Now I set any environment variables
Status = CPXsetintparam(CPLEXenv, CPX_PARAM_SCRIND, CPX_ON);
Status = CPXsetdblparam(CPLEXenv, CPX_PARAM_WORKMEM, 50);
Status = CPXsetstrparam(CPLEXenv, CPX_PARAM_WORKDIR, FOutputFilepath().data());
Status = CPXsetintparam(CPLEXenv, CPX_PARAM_NODEFILEIND, 2);
Status = CPXsetdblparam(CPLEXenv, CPX_PARAM_TRELIM, 50);
if (Status) {
FErrorFile() << "Failed to set screen indicators to on." << endl;
FlushErrorFile();
return FAIL;
}
if (GetParameter("CPLEX solver time limit").length() > 0 && GetParameter("CPLEX solver time limit").compare("none") != 0) {
Status = CPXsetdblparam (CPLEXenv, CPX_PARAM_TILIM, atof(GetParameter("CPLEX solver time limit").data()));
if (Status) {
FErrorFile() << "Failed to set CPLEX time limit." << endl;
FlushErrorFile();
return FAIL;
}
}
//I set the number of processors to run on if allowed to
// SYSTEM_INFO sysinfo;
// GetSystemInfo( &sysinfo );
// int numCPU = sysinfo.dwNumberOfProcessors;
Status = CPXsetintparam(CPLEXenv, CPX_PARAM_THREADS, 1);
Status = CPXsetintparam(CPLEXenv, CPX_PARAM_PARALLELMODE, 0);
Status = CPXsetintparam (CPLEXenv, CPX_PARAM_MIPDISPLAY, 0);
//Next I clear out any models that currently exist
if (CPLEXClearSolver() != SUCCESS) {
return FAIL; //error message already printed
}
//Now I create a new CPLEX model
CPLEXModel = CPXcreateprob (CPLEXenv, &Status, "LPProb");
Status = CPXchgprobtype(CPLEXenv, CPLEXModel, CPXPROB_LP);
if (Status || CPLEXModel == NULL) {
FErrorFile() << "Failed to create new CPLEX model." << endl;
FlushErrorFile();
return FAIL;
}
return SUCCESS;
}
