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update card reader service to meet changes made to wrong code base for issue #90

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Chris.Watts90@outlook.com 2018-03-08 09:17:43 +00:00
parent 552abaac49
commit fb068cbdf2
1 changed files with 69 additions and 36 deletions
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105
DataCenter_Windows/WindowsDataCenter/CardReaderService/CardReaderService.cs
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@ -18,6 +18,9 @@ namespace CardReaderService
private string _readerName = ""; private string _readerName = "";
private SCardMonitor _cardMonitor; private SCardMonitor _cardMonitor;
private bool _initialised = false;
private AutoResetEvent _mainWorkerTerminationSignal;
private ILogger _logger; private ILogger _logger;
public CardReaderService() public CardReaderService()
@ -32,43 +35,9 @@ namespace CardReaderService
protected override void OnStart(string[] args) protected override void OnStart(string[] args)
{ {
var configPath = string.Concat(System.Reflection.Assembly.GetEntryAssembly().Location, ".config");
_logger = NinjectHelper.GetInstance().Get<ILogger>(); _logger = NinjectHelper.GetInstance().Get<ILogger>();
_logger.Trace("Starting Service.. Getting available readers");
var ctxFactory = ContextFactory.Instance; StartWorkerThread();
using(var context = ctxFactory.Establish(SCardScope.System))
{
var readerNames = context.GetReaders();
if (NoReaderAvailable(readerNames))
{
_logger.Trace("No Card Reader is available, Exiting..");
throw new ApplicationException("A card reader must be provided in order to operate.");
}
foreach (var reader in readerNames)
{
_logger.Trace("Found reader: {0}", reader);
}
var readerNameConfig = ConfigurationHandler.ConfigurationHandler.GetConfiguration("ReaderName");
if (string.IsNullOrEmpty(readerNameConfig) || (!readerNames.Contains(readerNameConfig)))
{
_logger.Warn("No reader found with the name: {0}, defaulting to first available reader {1}",
readerNameConfig, readerNames.First());
readerNameConfig = readerNames.First();
}
_logger.Trace("Choosing reader: {0}", readerNameConfig);
_readerName = readerNameConfig;
_cardMonitor = new SCardMonitor(ctxFactory, SCardScope.System);
_cardMonitor.CardInserted += _cardMonitor_CardInserted;
_cardMonitor.Start(_readerName);
StartWorkerThread();
}
} }
public void StopService() public void StopService()
@ -79,6 +48,7 @@ namespace CardReaderService
protected override void OnStop() protected override void OnStop()
{ {
_stopMainWorkerThread = true; _stopMainWorkerThread = true;
_mainWorkerTerminationSignal.Set();
if (_mainWorkThread!= null && _mainWorkThread.IsAlive) if (_mainWorkThread!= null && _mainWorkThread.IsAlive)
{ {
_mainWorkThread.Join(3000); _mainWorkThread.Join(3000);
@ -102,6 +72,7 @@ namespace CardReaderService
Name = "CardServiceMainThread", Name = "CardServiceMainThread",
IsBackground = false IsBackground = false
}; };
_mainWorkerTerminationSignal = new AutoResetEvent(false);
_mainWorkThread.Start(); _mainWorkThread.Start();
} }
@ -151,7 +122,51 @@ namespace CardReaderService
while (!_stopMainWorkerThread) while (!_stopMainWorkerThread)
{ {
//dont actually need to do anything.. but cannot exit right away? //dont actually need to do anything.. but cannot exit right away?
Thread.Sleep(3000); if (!WeHaveValidCardReader())
{
if (_initialised)
{
//card reader no longer available, tidy up.
_cardMonitor.Cancel();
_cardMonitor.CardInserted -= _cardMonitor_CardInserted;
_cardMonitor.Dispose();
_cardMonitor = null;
_initialised = false;
}
var ctxFactory = ContextFactory.Instance;
using (var context = ctxFactory.Establish(SCardScope.System))
{
var readerNames = context.GetReaders();
if (NoReaderAvailable(readerNames))
{
_logger.Trace("No Card Reader is available..");
}
else
{
foreach (var reader in readerNames)
{
_logger.Trace("Found reader: {0}", reader);
}
var readerNameConfig = ConfigurationHandler.ConfigurationHandler.GetConfiguration("ReaderName");
if (string.IsNullOrEmpty(readerNameConfig) || (!readerNames.Contains(readerNameConfig)))
{
_logger.Warn("No reader found with the name: {0}, defaulting to first available reader {1}",
readerNameConfig, readerNames.First());
readerNameConfig = readerNames.First();
}
_logger.Trace("Choosing reader: {0}", readerNameConfig);
_readerName = readerNameConfig;
_cardMonitor = new SCardMonitor(ctxFactory, SCardScope.System);
_cardMonitor.CardInserted += _cardMonitor_CardInserted;
_cardMonitor.Start(_readerName);
_initialised = true;
}
}
}
_mainWorkerTerminationSignal.WaitOne(3000);
} }
} }
@ -169,5 +184,23 @@ namespace CardReaderService
{ {
return readerNames == null || readerNames.Count < 1; return readerNames == null || readerNames.Count < 1;
} }
private bool WeHaveValidCardReader()
{
if (_cardMonitor == null)
{
return false;
}
Console.WriteLine(_cardMonitor.GetCurrentState(0));
if (_cardMonitor.GetCurrentState(0) == SCRState.Unknown
|| _cardMonitor.GetCurrentState(0) == SCRState.Unavailable
|| _cardMonitor.GetCurrentState(0) == (SCRState.Ignore | SCRState.Unavailable)
//|| _cardMonitor.GetCurrentState(0) == SCRState.Unaware //if we say this is an invalid state, we cause a memory leak where we create a duplicate card monitor, subscribe and overwrite.
)
{
return false;
}
return true;
}
} }
} }