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tutorials/HelloWorldCPP/hello_worldCPPTutorial_main.cpp
/*
* HELLO WORLD CPP
* ---------------
*
* This document describes the process to create a simple database,
* insert a record containing a text field, read the text field from
* database and print it out.
*/
#include <iostream>
#include "cpp-tfs.h" // The RDM TFS class
#include "cpp-exception.h" // The RDM exception class
#include "cpp-transaction.h" // The RDM transaction class
#include "hello_world_gen_api.h" // The hello_world database API.
using namespace RDM_CPP; // RDM Class
using namespace RDM_CPP::HELLO_WORLD; // RDM hello_world Db Class
static void hello_worldCPP (void)
{
TFS tfs;
Db_hello_world db;
RDM_TABLE_ID tables[] = {TABLE_INFO};
try
{
// Allocate RDM_TFS handle
tfs = TFS::Alloc ("");
// Allocate RDM_DB handle
db = tfs.AllocDatabase ();
// Open database
db.Open ("hello_world");
} catch (rdm_exception)
{
std::cerr << "I can't open the hello_world database." << std::endl;
throw;
}
/* Start an update transaction and lock the table */
db.StartUpdate (tables, RDM_LEN (tables));
try
{
/* Remove all of the rows from the database */
db.DeleteAllRows ();
/* Commit the transaction */
db.End ();
} catch (rdm_exception)
{
/* Rollback the transaction */
db.EndRollback ();
throw;
}
/* Start an update transaction and lock the table */
db.StartUpdate (tables, RDM_LEN (tables));
try
{
INFO infoInserted;
/* Insert a row into the table */
strcpy (
infoInserted.mychar, "Hello World CPP! - using the embedded TFS");
db.Insert_info_Row (infoInserted);
/* Commit a transaction */
db.End ();
} catch (rdm_exception)
{
/* Rollback the transaction */
db.EndRollback ();
throw;
}
/* Start a read transaction and lock the table */
db.StartRead (tables, RDM_LEN (tables));
try
{
Cursor_info cursor;
INFO infoRead;
/* Fill a cursor with all the rows in a table */
cursor = db.Get_info_Rows ();
/* Move to the first row in the info table */
cursor.MoveToFirst ();
/* Read the full content of the current record */
cursor.ReadRow (infoRead);
std::cout << infoRead.mychar << std::endl;
/* Free the read lock on the table */
db.End ();
} catch (rdm_exception)
{
/* Rollback the transaction */
db.EndRollback ();
throw;
}
}
int32_t hello_worldCPPTutorial_main (int32_t argc, const char *const *argv)
{
RDM_UNREF (argc);
RDM_UNREF (argv);
try
{
hello_worldCPP ();
} catch (const rdm_exception &e)
{
std::cerr << "There was an error in this Tutorial (" << e.GetEnum ()
<< ", " << e.GetDescription () << ")" << std::endl;
return EXIT_FAILURE;
}
return EXIT_SUCCESS;
}
RDM_STARTUP_EXAMPLE (hello_worldCPPTutorial)