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Set service so that it will always start, not exit early if there is no card reader attached.

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WIP #90
This commit is contained in:
Chris.Watts90@outlook.com 2018-03-06 14:31:31 +00:00
parent 5639724390
commit 7ec0db9ebb
1 changed files with 53 additions and 35 deletions
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70
CardReaderService/CardReaderService/Service1.cs
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@ -12,9 +12,8 @@ namespace CardReaderService
{ {
private Thread _mainWorkThread; private Thread _mainWorkThread;
private bool _stopMainWorkerThread; private bool _stopMainWorkerThread;
private AutoResetEvent _mainWorkerTerminationSignal;
private string _readerName = ""; private string _readerName = "";
//private SCardReader _reader;
private SCardMonitor _cardMonitor; private SCardMonitor _cardMonitor;
public Service1() public Service1()
@ -26,27 +25,25 @@ namespace CardReaderService
{ {
OnStart(new string[] { }); OnStart(new string[] { });
} }
//
protected override void OnStart(string[] args) protected override void OnStart(string[] args)
{ {
Console.WriteLine("Starting.. Getting available readers");
var ctxFactory = ContextFactory.Instance;
using(var context = ctxFactory.Establish(SCardScope.System))
{
var readerNames = context.GetReaders();
if (NoReaderAvailable(readerNames))
{
Console.WriteLine("No Card Reader is available, Exiting..");
return;
}
Console.WriteLine("Choosing first available reader: " + readerNames.First());
_readerName = readerNames.First();
_cardMonitor = new SCardMonitor(ctxFactory, SCardScope.System);
_cardMonitor.CardInserted += _cardMonitor_CardInserted;
_cardMonitor.Start(_readerName);
StartWorkerThread(); StartWorkerThread();
} }
private bool WeHaveValidCardReader()
{
if (_cardMonitor == null)
{
return false;
}
if (_cardMonitor.GetCurrentState(0) == SCRState.Unknown ||
_cardMonitor.GetCurrentState(0) == SCRState.Unavailable ||
_cardMonitor.GetCurrentState(0) == SCRState.Unaware)
{
return false;
}
return true;
} }
public void Stop() public void Stop()
@ -57,14 +54,11 @@ 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);
if (_mainWorkThread.IsAlive)
{ {
_mainWorkThread.Interrupt(); _mainWorkThread.Interrupt();
} }
}
if (_cardMonitor != null) if (_cardMonitor != null)
{ {
_cardMonitor.Cancel(); _cardMonitor.Cancel();
@ -81,6 +75,7 @@ namespace CardReaderService
Name = "CardServiceMainThread", Name = "CardServiceMainThread",
IsBackground = false IsBackground = false
}; };
_mainWorkerTerminationSignal = new AutoResetEvent(false);
_mainWorkThread.Start(); _mainWorkThread.Start();
} }
@ -130,14 +125,37 @@ namespace CardReaderService
{ {
while (!_stopMainWorkerThread) while (!_stopMainWorkerThread)
{ {
//dont actually need to do anything.. but cannot exit right away? if (!WeHaveValidCardReader())
Thread.Sleep(3000); { //only do this if we don't have a valid card reader
Console.WriteLine("Starting.. Getting available readers");
var ctxFactory = ContextFactory.Instance;
using (var context = ctxFactory.Establish(SCardScope.System))
{
var readerNames = context.GetReaders();
if (!NoReaderAvailable(readerNames))
{
//we have a reader available, so initialise!
Console.WriteLine("Choosing first available reader: " + readerNames.First());
_readerName = readerNames.First();
_cardMonitor = new SCardMonitor(ctxFactory, SCardScope.System);
_cardMonitor.CardInserted += _cardMonitor_CardInserted;
_cardMonitor.Start(_readerName);
StartWorkerThread();
}
else
{
Console.WriteLine("No Card Reader is available..");
}
}
}
_mainWorkerTerminationSignal.WaitOne(3000);
} }
} }
private string ConvertByteUIDToString(byte[] uid) private string ConvertByteUIDToString(byte[] uid)
{ {
StringBuilder sb = new StringBuilder(); var sb = new StringBuilder();
foreach (var b in uid) foreach (var b in uid)
{ {