public bool PerformMigration()
{
bool migrationSuccess = false;
MySqlConnection = MySqlDbConnection.getInstance();
List <HockeyPlayer> hockeyPlayers = new List <HockeyPlayer>();
hockeyPlayers = MySqlConnection.Read();
Console.WriteLine($"Read {hockeyPlayers.Count} records out of the MySQL database.");
MySqlConnection.ResetConnection();
MongoConnection = MongoDbConnection.getInstance();
int counter = 0;
foreach (var player in hockeyPlayers)
{
bool insertSuccess = MongoConnection.Insert(player);
if (insertSuccess == false)
{
throw new MigrationMySql2MongoDbException("Failed to insert player into MongoDB.");
}
else
{
counter++;
}
}
Console.WriteLine($"Wrote {counter} records to the Monday database.");
return(migrationSuccess);
}
// =====================================================
public static MongoDbConnection getInstance()
// =====================================================
{
if (_dbConnection == null)
{
Console.WriteLine("Using the MongoDb database.");
_dbConnection = new MongoDbConnection();
}
return((MongoDbConnection)_dbConnection);
}
// =====================================================
public static DbConnection getInstance(string uid = null, string password = null)
// =====================================================
{
if (_dbConnection == null)
{
if (Server == DbConnection.Server.MySql)
{
_dbConnection = MySqlDbConnection.getInstance();
}
else if (Server == DbConnection.Server.MongoDb)
{
_dbConnection = MongoDbConnection.getInstance();
}
else
{
throw new HammerMainException("Error: DB Server unavailable.");
}
}
return(_dbConnection);
}