public override void Dispose(ChromiumProcessManager p)
{
// Nothing to do
}
/// <summary>
/// Handles process start request.
/// </summary>
/// <param name="p">The Chromium process.</param>
/// <returns>A <see cref="Task"/> that completes when the start action is done.</returns>
public virtual Task StartAsync(ChromiumProcessManager p) => Task.FromException(InvalidOperation("start"));
public override Task WaitForExitAsync(ChromiumProcessManager p) => Task.FromException(InvalidOperation("wait for exit"));
private async Task StartCoreAsync(ChromiumProcessManager p)
{
var output = new StringBuilder();
void OnProcessDataReceivedWhileStarting(object sender, DataReceivedEventArgs e)
{
if (e.Data != null)
{
output.AppendLine(e.Data);
var match = Regex.Match(e.Data, "^DevTools listening on (ws:\\/\\/.*)");
if (match.Success)
{
p._startCompletionSource.TrySetResult(match.Groups[1].Value);
}
}
}
void OnProcessExitedWhileStarting(object sender, EventArgs e)
=> p._startCompletionSource.TrySetException(new MessageException($"Failed to launch Chromium! {output}"));
void OnProcessExited(object sender, EventArgs e) => Exited.EnterFrom(p, p._currentState);
p.Process.ErrorDataReceived += OnProcessDataReceivedWhileStarting;
p.Process.Exited += OnProcessExitedWhileStarting;
p.Process.Exited += OnProcessExited;
CancellationTokenSource cts = null;
try
{
p.Process.Start();
await Started.EnterFromAsync(p, this).ConfigureAwait(false);
p.Process.BeginErrorReadLine();
int timeout = p.Timeout;
if (timeout > 0)
{
cts = new CancellationTokenSource(timeout);
cts.Token.Register(() => p._startCompletionSource.TrySetException(
new MessageException($"Timed out after {timeout} ms while trying to connect to Chromium!")));
}
try
{
await p._startCompletionSource.Task.ConfigureAwait(false);
await Started.EnterFromAsync(p, this).ConfigureAwait(false);
}
catch
{
await Killing.EnterFromAsync(p, this).ConfigureAwait(false);
throw;
}
}
finally
{
cts?.Dispose();
p.Process.Exited -= OnProcessExitedWhileStarting;
p.Process.ErrorDataReceived -= OnProcessDataReceivedWhileStarting;
}
}
/// <summary>
/// Notifies that state machine is about to transition to another state.
/// </summary>
/// <param name="p">The Chromium process.</param>
protected virtual void Leave(ChromiumProcessManager p)
{
}
public override Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout)
{
Exited.EnterFrom(p, this);
return(Task.CompletedTask);
}
public override Task KillAsync(ChromiumProcessManager p) => WaitForExitAsync(p);
/// <summary> /// Handles wait for process exit request. /// </summary> /// <param name="p">The Chromium process.</param> /// <returns>A <see cref="Task"/> that completes when the wait finishes.</returns> public virtual Task WaitForExitAsync(ChromiumProcessManager p) => p._exitCompletionSource.Task;
public override Task KillAsync(ChromiumProcessManager p) => Killing.EnterFromAsync(p, this);
public override Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout) => WaitForExitAsync(p);
public Task EnterFromAsync(ChromiumProcessManager p, State fromState, TimeSpan timeout) => !TryEnter(p, fromState) ? p._currentState.ExitAsync(p, timeout) : ExitAsync(p, timeout);
protected override void Leave(ChromiumProcessManager p) => LogProcessCount(p, Interlocked.Decrement(ref _processCount));
public override Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout) => Exiting.EnterFromAsync(p, this, timeout);
/// <summary>
/// Handles process exit request.
/// </summary>
/// <param name="p">The Chromium process.</param>
/// <param name="timeout">The maximum waiting time for a graceful process exit.</param>
/// <returns>A <see cref="Task"/> that completes when the exit action is done.</returns>
public virtual Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout) => Task.FromException(InvalidOperation("exit"));
public override Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout) => Task.CompletedTask;
/// <summary>
/// Handles process kill request.
/// </summary>
/// <param name="p">The Chromium process.</param>
/// <returns>A <see cref="Task"/> that completes when the kill action is done.</returns>
public virtual Task KillAsync(ChromiumProcessManager p) => Task.FromException(InvalidOperation("kill"));
public override Task KillAsync(ChromiumProcessManager p) => Task.CompletedTask;
/// <summary> /// Handles disposal of process and temporary user directory. /// </summary> /// <param name="p">Process.</param> public virtual void Dispose(ChromiumProcessManager p) => Disposed.EnterFrom(p, this);
public override Task WaitForExitAsync(ChromiumProcessManager p) => Task.CompletedTask;
public override Task StartAsync(ChromiumProcessManager p) => Starting.EnterFromAsync(p, this);
public override Task ExitAsync(ChromiumProcessManager p, TimeSpan timeout) => throw new ObjectDisposedException(p.ToString());
public override Task KillAsync(ChromiumProcessManager p)
{
Exited.EnterFrom(p, this);
return(Task.CompletedTask);
}
public override Task KillAsync(ChromiumProcessManager p) => throw new ObjectDisposedException(p.ToString());
public override Task StartAsync(ChromiumProcessManager p) => p._startCompletionSource.Task;
public override void Dispose(ChromiumProcessManager p)
{
p._startCompletionSource.TrySetException(new ObjectDisposedException(p.ToString()));
base.Dispose(p);
}