/// <summary>
/// Stops bitcoin daemon process when PID file exists.
/// </summary>
/// <remarks>If there is not PID file, no process is stopped.</remarks>
/// <param name="onlyOwned">Only stop if this node owns the process.</param>
public async Task StopAsync(bool onlyOwned)
{
Logger.LogDebug($"> {nameof(onlyOwned)}={onlyOwned}");
if (Process is null)
{
Logger.LogDebug("< Process is null.");
return;
}
// "process" variable is guaranteed to be non-null at this point.
ProcessAsync process = Process;
using var cts = new CancellationTokenSource(_reasonableCoreShutdownTimeout);
int?pid = await PidFile.TryReadAsync().ConfigureAwait(false);
// If the cached PID is PID, then we own the process.
if (pid.HasValue && (!onlyOwned || CachedPid == pid))
{
Logger.LogDebug($"User is responsible for the daemon process with PID {pid}. Stop it.");
try
{
bool isKilled = false;
try
{
// Stop Bitcoin daemon using RPC "stop" command.
// The command actually only initiates the bitcoind graceful shutdown procedure.
// Our time budget for the bitcoind to stop is given by "ReasonableCoreShutdownTimeout".
await RpcClient.StopAsync().ConfigureAwait(false);
}
catch (Exception ex)
{
Logger.LogWarning(ex);
process.Kill();
isKilled = true;
}
if (!isKilled)
{
Logger.LogDebug($"Wait until the process is stopped.");
await process.WaitForExitAsync(cts.Token).ConfigureAwait(false);
}
}
finally
{
Logger.LogDebug($"Wait until the process is stopped.");
process.Dispose();
Process = null;
PidFile.TryDelete();
}
}
else
{
Logger.LogDebug("User is NOT responsible for the daemon process.");
}
Logger.LogDebug("<");
}
public BitcoindRpcProcessBridge(IRPCClient rpcClient, string dataDir, bool printToConsole)
{
RpcClient = rpcClient;
Network = RpcClient.Network;
DataDir = dataDir;
PrintToConsole = printToConsole;
PidFile = new PidFile(Path.Combine(DataDir, NetworkTranslator.GetDataDirPrefix(Network)), PidFileName);
CachedPid = null;
Process = null;
}
public void ForceResetInvalidPidCtor()
{
var tmp = Path.GetTempFileName();
try {
File.WriteAllText(tmp, "-9999");
using (var l = new PidFile(tmp, PidFileMode.Forced)) {
Assert.True(l.IsAquired);
}
}
finally {
File.Delete(tmp);
}
}
public void WillNoAquireIfExists()
{
var tmp = Path.GetTempFileName();
try {
File.WriteAllText(tmp, "data");
using (var l = new PidFile(tmp)) {
Assert.False(l.IsAquired); // flag not set
}
Assert.True(File.Exists(tmp)); //will not delete
}
finally {
File.Delete(tmp);
}
}
public void CanGetCurrentPID()
{
var tmp = Path.GetTempFileName();
try {
File.WriteAllText(tmp, "1234");
using (var l = new PidFile(tmp)) {
Assert.False(l.IsAquired);
Assert.AreEqual(1234, l.GetCurrentLockPid());
}
}
finally {
File.Delete(tmp);
}
}
public void CanLockFileAndDeleteIt()
{
var tmp = Path.GetTempFileName();
File.Delete(tmp);
Assert.False(File.Exists(tmp));
using (var l = new PidFile(tmp)) {
Assert.True(l.IsAquired); // flag set
Assert.True(File.Exists(tmp)); //creates locker file
var pid = Process.GetCurrentProcess().Id;
using (var fs = new FileStream(tmp, FileMode.Open, FileAccess.Read, FileShare.ReadWrite)) {
using (var sr = new StreamReader(fs)) {
Assert.AreEqual(pid, Convert.ToInt32(sr.ReadToEnd())); // read shared and PID
}
}
}
Assert.False(File.Exists(tmp));
}
public void NotResetExistedPid()
{
var pid = Process.GetProcesses().First().Id;
var tmp = Path.GetTempFileName();
try
{
File.WriteAllText(tmp, pid.ToString());
using (var l = new PidFile(tmp, PidFileMode.Forced))
{
Assert.False(l.IsAquired);
}
}
finally
{
File.Delete(tmp);
}
}
public void CanResetPID()
{
var tmp = Path.GetTempFileName();
try {
File.WriteAllText(tmp, "1234");
using (var l = new PidFile(tmp)) {
Assert.False(l.IsAquired);
l.Reset();
Assert.False(l.IsAquired);
File.Delete(tmp);
l.Reset();
Assert.True(l.IsAquired);
}
}
finally {
File.Delete(tmp);
}
}
/// <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;
}
}
