/// <summary>
/// See <see cref="PrevalenceActivator.CreateEngine(System.Type, string)"/>
/// </summary>
/// <param name="systemType"></param>
/// <param name="prevalenceBase"></param>
/// <param name="formatter"></param>
/// <param name="handler"></param>
internal PrevalenceEngine(System.Type systemType, string prevalenceBase, BinaryFormatter formatter, ExceptionDuringRecoveryHandler handler)
{
_clock = new AlarmClock();
CommandLogReader reader = new CommandLogReader(CheckPrevalenceBase(prevalenceBase), formatter);
RecoverSystem(systemType, reader, handler);
_commandLog = reader.ToWriter();
_lock = new ReaderWriterLock();
_decorators = GetCommandDecorators(systemType);
_paused = false;
}