public RemoteScannerInterface(
ILogger logger,
CallPropertiesConfig commonCallProperties,
CallPropertiesConfig synchronizationCallProperties,
CallPropertiesConfig printingCallProperties)
{
CodeContract.Requires(logger != null);
CodeContract.Requires(commonCallProperties != null);
CodeContract.Requires(synchronizationCallProperties != null);
CodeContract.Requires(printingCallProperties != null);
_logger = logger;
_commonCallProperties = commonCallProperties;
_synchronizationCallProperties = synchronizationCallProperties;
_printingCallProperties = printingCallProperties;
}
private T SafeCall <T>(Func <T> method, CallPropertiesConfig callProps, T returnOnError)
{
if (!_alive)
{
return(returnOnError);
}
var tryCount = 0;
var methodComplete = new AutoResetEvent(false);
while (!_disposed && _alive)
{
try
{
var result = default(T);
Exception methodEx = null;
methodComplete.Reset();
var thread = ThreadUtils.StartBackgroundThread(
() =>
{
try
{
result = method();
}
catch (Exception ex)
{
methodEx = ex;
}
finally
{
methodComplete.Set();
}
});
if (!methodComplete.WaitOne(callProps.Timeout))
{
thread.SafeAbort();
throw new TimeoutException("Не дождались завершение выполнения метода");
}
if (methodEx != null)
{
throw methodEx;
}
return(result);
}
catch (Exception ex)
{
_logger.LogVerbose(
Message.SyncCallRemoteMethodFailed,
() =>
{
var methodInfo = (new StackTrace()).GetFrame(3).GetMethod();
return(new object[] { methodInfo.Name, ex.ToString() });
});
if ( // ошибка не из-за сети
((!(ex is SocketException) && !(ex is RemotingException)) && !(ex is TimeoutException)) ||
++tryCount >= callProps.MaxTryCount ||
!_alive ||
_disposed)
{
RaiseDisconnected();
return(returnOnError);
}
if (!Monitor.TryEnter(s_ifrestartSync))
{
Thread.Sleep(300);
_ifrestartDoneEvent.WaitOne(TimeSpan.FromMinutes(1));
continue;
}
try
{
_ifrestartDoneEvent.Reset();
IfrestartResult res;
if (PlatformDetector.IsUnix)
{
_logger.LogVerbose(Message.SyncIfrestartStarting);
string lastLine = null;
ProcessHelper.StartProcessAndWaitForFinished(
"./ifrestart.sh",
string.Format("{0} {1}", callProps.RetryDelay, _remoteScannerInfo.IpAddress),
state =>
{
lastLine = state.Line;
return(false);
},
null);
_logger.LogVerbose(Message.SyncIfrestartDone, lastLine);
int i;
res = int.TryParse(lastLine, out i)
? (IfrestartResult)i
: IfrestartResult.Failed;
}
else
{
_logger.LogVerbose(Message.Common_Debug,
"Имитируем выполнение команды переподнятия сети");
Thread.Sleep(4000 + callProps.RetryDelay * 2 * 1000);
res = IfrestartResult.OkAfterRestart;
}
switch (res)
{
case IfrestartResult.OkAfterRestart:
_logger.LogVerbose(Message.SyncTryCallRemoteMethodAgain,
() =>
{
var methodInfo = (new StackTrace()).GetFrame(3).GetMethod();
return(new object[] { methodInfo.Name, tryCount + 1 });
});
continue;
default:
RaiseDisconnected();
return(returnOnError);
}
}
finally
{
Monitor.Exit(s_ifrestartSync);
_ifrestartDoneEvent.Set();
}
}
}
return(returnOnError);
}
