private void OnErrorDataReceived(object sender, DataReceivedEventArgs e)
{
if (e.Data != null)
{
_log.WriteLineAsync(MessageCategory.Error, e.Data);
}
}
public async Task Run(CancellationToken ct = default(CancellationToken))
{
TaskUtilities.AssertIsOnBackgroundThread();
if (_runTask != null)
{
throw new InvalidOperationException("This host is already running.");
}
ct = CancellationTokenSource.CreateLinkedTokenSource(ct, _cts.Token).Token;
try {
_runTask = RunWorker(ct);
await _runTask;
} catch (OperationCanceledException) when(ct.IsCancellationRequested)
{
// Expected cancellation, do not propagate, just exit process
} catch (MessageTransportException ex) when(ct.IsCancellationRequested)
{
// Network errors during cancellation are expected, but should not be exposed to clients.
throw new OperationCanceledException(new OperationCanceledException().Message, ex);
} catch (Exception ex) {
var message = "Exception in RHost run loop:\n" + ex;
_log.WriteLineAsync(LogVerbosity.Minimal, MessageCategory.Error, message).DoNotWait();
Debug.Fail(message);
throw;
} finally {
// Signal cancellation to any callbacks that haven't returned yet.
_cts.Cancel();
_requests.Clear();
}
}
public static void RHostProcessStarted(this IActionLog log, ProcessStartInfo psi)
{
var sb = new StringBuilder();
sb.AppendLine(Invariant($"R Host process started: {psi.FileName}"));
if (psi.EnvironmentVariables.Count > 0)
{
sb.AppendLine("Environment variables:");
foreach (var variable in psi.Environment)
{
sb.Append(' ', 4).AppendLine(Invariant($"{variable.Key}={variable.Value}"));
}
}
log.WriteLineAsync(MessageCategory.General, sb.ToString());
}
public static void RHostProcessExited(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, "R Host process exited");
}
public static void EnterRLoop(this IActionLog log, int depth)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, Invariant($"Enter R loop, depth={depth}"));
}
public static void WatcherApplyRecoveryChange(this IActionLog log, string change)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, Invariant($"Apply recovery change: {change}"));
}
public static void WatcherStarted(this IActionLog log)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, "MsBuildFileSystemWatcher started");
}
public static void ExitRLoop(this IActionLog log, int depth)
{
log.WriteLineAsync(MessageCategory.General, Invariant($"Exit R loop, depth={depth}"));
}
public static void WatcherApplyChange(this IActionLog log, string change)
{
log.WriteLineAsync(MessageCategory.General, Invariant($"Apply change: {change}"));
}
public static void WatcherConsumeChangesStarted(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, "File system changes consumer started");
}
public static void WatcherConsumeChangesScheduled(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, "Consume file system changes scheduled");
}
public static void WatcherStarting(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, "MsBuildFileSystemWatcher starting");
}
public static void WatcherApplyRecoveryChange(this IActionLog log, string change)
{
log.WriteLineAsync(MessageCategory.General, $"Apply recovery change: {change}");
}
public static void Request(this IActionLog log, string request, int depth)
{
log.WriteLineAsync(LogVerbosity.Traffic, MessageCategory.General, Invariant($"[Request,depth={depth}]:{request}"));
}
public static void ConnectedToRHostWebSocket(this IActionLog log, string uri, int attempt)
{
log.WriteLineAsync(MessageCategory.General, Invariant($"Connected to R Web Host socket at {uri} on attempt #{attempt}"));
}
public static void FailedToConnectToRHost(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, Invariant($"Timed out waiting for RHost to connect"));
}
public static void WatcherApplyChangeFailed(this IActionLog log, string change, Exception exception)
{
log.WriteLineAsync(MessageCategory.Error, Invariant($"Failed to apply change '{change}':{exception}"));
}
public static void Response(this IActionLog log, string response, int depth)
{
log.WriteLineAsync(MessageCategory.General, Invariant($"[Response,depth={depth}]:{response}"));
}
public static void MsBuildAfterChangesApplied(this IActionLog log, ProjectRootElement rootElement)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, "File mirroring project after changes applied:" + Environment.NewLine + rootElement.RawXml);
}
public static void WatcherConsumeChangesFinished(this IActionLog log)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, "File system changes consumer finished");
}
public static void ApplyProjectChangesStarted(this IActionLog log)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.General, "Starting applying changes to file-mirroring project");
}
public static void WatcherApplyRecoveryChangeFailed(this IActionLog log, string change, Exception exception)
{
log.WriteLineAsync(LogVerbosity.Normal, MessageCategory.Error, Invariant($"Failed to apply recovery change '{change}', closing watcher:{exception}"));
}
public static void ApplyProjectChangesFinished(this IActionLog log)
{
log.WriteLineAsync(MessageCategory.General, "Finished applying changes to file-mirroring project");
}