public void ProcessTest()
{
var let = new LastExceptionTracker();
// Process first exception to process.
{
ExceptionInfo lastException = let.Process(new ArgumentOutOfRangeException());
Assert.IsType <ArgumentOutOfRangeException>(lastException.Exception);
Assert.Equal(1, lastException.ExceptionCount);
}
// Same exception encountered.
{
ExceptionInfo lastException = let.Process(new ArgumentOutOfRangeException());
Assert.IsType <ArgumentOutOfRangeException>(lastException.Exception);
Assert.Equal(2, lastException.ExceptionCount);
}
// Different exception encountered.
{
ExceptionInfo lastException = let.Process(new NotImplementedException());
Assert.IsType <NotImplementedException>(lastException.Exception);
Assert.Equal(1, lastException.ExceptionCount);
}
}
/// <summary>
/// This method can be called only once.
/// </summary>
public async Task StartAsync(CancellationToken cancel)
{
int ptcv = PrintToConsole ? 1 : 0;
string processPath = MicroserviceHelpers.GetBinaryPath("bitcoind");
string networkArgument = NetworkTranslator.GetCommandLineArguments(Network);
string args = $"{networkArgument} -datadir=\"{DataDir}\" -printtoconsole={ptcv}";
// Start bitcoind process.
Process = new ProcessAsync(ProcessStartInfoFactory.Make(processPath, args));
Process.Start();
// Store PID in PID file.
await PidFile.WriteFileAsync(Process.Id).ConfigureAwait(false);
CachedPid = Process.Id;
try
{
var exceptionTracker = new LastExceptionTracker();
// Try to connect to bitcoin daemon RPC until we succeed.
while (true)
{
try
{
TimeSpan timeSpan = await RpcClient.UptimeAsync(cancel).ConfigureAwait(false);
Logger.LogInfo("RPC connection is successfully established.");
Logger.LogDebug($"RPC uptime is: {timeSpan}.");
// Bitcoin daemon is started. We are done.
break;
}
catch (Exception ex)
{
ExceptionInfo exceptionInfo = exceptionTracker.Process(ex);
// Don't log extensively.
if (exceptionInfo.IsFirst)
{
Logger.LogInfo($"{Constants.BuiltinBitcoinNodeName} is not yet ready... Reason: {exceptionInfo.Exception.Message}");
}
if (Process is { } p&& p.HasExited)
{
throw new BitcoindException($"Failed to start daemon, location: '{p.StartInfo.FileName} {p.StartInfo.Arguments}'", ex);
}
}
if (cancel.IsCancellationRequested)
{
Logger.LogDebug("Bitcoin daemon was not started yet and user requested to cancel the operation.");
await StopAsync(onlyOwned : true).ConfigureAwait(false);
cancel.ThrowIfCancellationRequested();
}
// Wait a moment before the next check.
await Task.Delay(100, cancel).ConfigureAwait(false);
}
}
catch (Exception)
{
Process?.Dispose();
throw;
}
}
protected PeriodicRunner(TimeSpan period)
{
Period = period;
ExceptionTracker = new LastExceptionTracker();
}