core/testsuite/partition_io/main_write.cpp

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/*!
    @file
    @brief Test for PartitionIO class - cut and write

    @author Radu Popescu <radu.popescu@epfl.ch>
    @maintainer Radu Popescu <radu.popescu@epfl.ch>
    @date 10-05-2012

    Partition a mesh using a single (MPI) process and save mesh parts
    to an HDF5 file.
 */

#include <lifev/core/LifeV.hpp>

#ifdef LIFEV_HAS_HDF5


#include "Epetra_config.h"

#ifdef HAVE_MPI

#include <Epetra_MpiComm.h>


#include <lifev/core/mesh/MeshPartitioner.hpp>
#include <lifev/core/filter/PartitionIO.hpp>
#include <lifev/core/filter/ExporterHDF5Mesh3D.hpp>
#include <lifev/core/mesh/RegionMesh3DStructured.hpp>
#include <lifev/core/mesh/MeshData.hpp>

using namespace LifeV;

#endif /* HAVE_MPI */
#endif /* LIFEV_HAS_HDF5 */

int main (int argc, char** argv)
{
#ifdef LIFEV_HAS_HDF5
#ifdef HAVE_MPI

    typedef RegionMesh<LinearTetra> mesh_Type;
    typedef boost::shared_ptr<mesh_Type> meshPtr_Type;

    MPI_Init (&argc, &argv);
    boost::shared_ptr<Epetra_Comm> comm (new Epetra_MpiComm (MPI_COMM_WORLD) );

    if (comm->NumProc() != 1)
    {
        std::cout << "This test needs to be run "
                  << "with a single process. Aborting."
                  << std::endl;
        return (EXIT_FAILURE);
    }

    GetPot commandLine (argc, argv);
    std::string dataFileName = commandLine.follow ("data", 2, "-f", "--file");
    GetPot dataFile (dataFileName);

    const UInt numParts (dataFile ("test/num_parts", 4) );
    const std::string partsFileName (dataFile ("test/hdf5_file_name", "cube.h5") );
    const std::string ioClass (dataFile ("test/io_class", "new") );

    std::cout << "Number of parts: " << numParts << std::endl;
    std::cout << "Name of HDF5 container: " << partsFileName << std::endl;

    boost::shared_ptr<mesh_Type> fullMeshPtr (new mesh_Type );
    //regularMesh3D (*fullMeshPtr, 1, numElements, numElements, numElements,
    //               false, 2.0, 2.0, 2.0, -1.0, -1.0, -1.0);

    // New part to partition the new mesh
    MeshData meshData;
    meshData.setup(dataFile, "mesh");
    readMesh(*fullMeshPtr, meshData);

    MeshPartitioner<mesh_Type> meshPart;
    meshPart.setup (numParts, comm);

    meshPart.attachUnpartitionedMesh (fullMeshPtr);
    meshPart.doPartitionGraph();
    meshPart.doPartitionMesh();

    // Release the original mesh from the MeshPartitioner object and
    // delete the RegionMesh object
    meshPart.releaseUnpartitionedMesh();
    fullMeshPtr.reset();

    // Write mesh parts to HDF5 container
    if (! ioClass.compare ("old") )
    {
        ExporterHDF5Mesh3D<mesh_Type> HDF5Output (dataFile,
                                                  meshPart.meshPartition(),
                                                  partsFileName,
                                                  comm->MyPID() );
        HDF5Output.addPartitionGraph (meshPart.elementDomains(), comm);
        HDF5Output.addMeshPartitionAll (meshPart.meshPartitions(), comm);
        HDF5Output.postProcess (0);
        HDF5Output.closeFile();
    }
    else
    {
        boost::shared_ptr<Epetra_MpiComm> mpiComm =
            boost::dynamic_pointer_cast<Epetra_MpiComm> (comm);
        PartitionIO<mesh_Type> partitionIO (partsFileName, mpiComm);
        partitionIO.write (meshPart.meshPartitions() );
    }

    MPI_Finalize();

#else
    std::cout << "This test needs MPI to run. Aborting." << std::endl;
    return (EXIT_FAILURE);
#endif /* HAVE_MPI */
#else
    std::cout << "This test needs HDF5 to run. Aborting." << std::endl;
    return (EXIT_FAILURE);
#endif /* LIFEV_HAS_HDF5 */

    return (EXIT_SUCCESS);
}