internal DataAccessContext(string mutexName, string databaseFilename)
{
if (!string.IsNullOrEmpty(mutexName))
{
_mutex = ExclusiveLock.CreateFileSystemLock(SqlCeDatabaseHelper <DicomStoreDataContext> .GetDatabaseFilePath(mutexName + databaseFilename));
_mutex.Lock();
}
try
{
// initialize a connection and transaction
_databaseFilename = databaseFilename;
_connection = CreateConnection();
_transaction = _connection.BeginTransaction(IsolationLevel.ReadCommitted);
_context = new DicomStoreDataContext(_connection);
//_context.Log = Console.Out;
}
catch
{
_mutex.Unlock();
_mutex.Dispose();
_mutex = null;
throw;
}
lock (_syncLock)
{
if (_staticConnection == null)
{
// This is done for performance reasons. It forces a connection to remain open while the
// the app domain is running, so that the database is kept in memory.
try
{
_staticConnection = CreateConnection();
}
catch (Exception ex)
{
Platform.Log(LogLevel.Debug, ex, "Failed to initialize static connection to data store database");
}
}
}
}
